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Arvanitaki ES, Goulielmaki E, Gkirtzimanaki K, Niotis G, Tsakani E, Nenedaki E, Rouska I, Kefalogianni M, Xydias D, Kalafatakis I, Psilodimitrakopoulos S, Karagogeos D, Schumacher B, Stratakis E, Garinis GA. Microglia-derived extracellular vesicles trigger age-related neurodegeneration upon DNA damage. Proc Natl Acad Sci U S A 2024; 121:e2317402121. [PMID: 38635632 PMCID: PMC11047102 DOI: 10.1073/pnas.2317402121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 03/22/2024] [Indexed: 04/20/2024] Open
Abstract
DNA damage and neurodegenerative disorders are intimately linked but the underlying mechanism remains elusive. Here, we show that persistent DNA lesions in tissue-resident macrophages carrying an XPF-ERCC1 DNA repair defect trigger neuroinflammation and neuronal cell death in mice. We find that microglia accumulate dsDNAs and chromatin fragments in the cytosol, which are sensed thereby stimulating a viral-like immune response in Er1Cx/- and naturally aged murine brain. Cytosolic DNAs are packaged into extracellular vesicles (EVs) that are released from microglia and discharge their dsDNA cargo into IFN-responsive neurons triggering cell death. To remove cytosolic dsDNAs and prevent inflammation, we developed targeting EVs to deliver recombinant DNase I to Er1Cx/- brain microglia in vivo. We show that EV-mediated elimination of cytosolic dsDNAs is sufficient to prevent neuroinflammation, reduce neuronal apoptosis, and delay the onset of neurodegenerative symptoms in Er1Cx/- mice. Together, our findings unveil a causal mechanism leading to neuroinflammation and provide a rationalized therapeutic strategy against age-related neurodegeneration.
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Affiliation(s)
- Ermioni S. Arvanitaki
- Department of Biology, University of Crete, HeraklionGR71409, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - Evi Goulielmaki
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - Katerina Gkirtzimanaki
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - George Niotis
- Department of Biology, University of Crete, HeraklionGR71409, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - Edisona Tsakani
- Department of Biology, University of Crete, HeraklionGR71409, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - Electra Nenedaki
- Department of Biology, University of Crete, HeraklionGR71409, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - Iliana Rouska
- Department of Biology, University of Crete, HeraklionGR71409, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
| | - Mary Kefalogianni
- Department of Physics, University of Crete, HeraklionGR71003, Crete, Greece
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, HeraklionGR71110, Crete, Greece
| | - Dionysios Xydias
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, HeraklionGR71110, Crete, Greece
- Materials Science and Technology Department, University of Crete, HeraklionGR70013, Crete, Greece
| | - Ilias Kalafatakis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
- Medical School, Division of Basic Sciences, University of Crete, HeraklionGR71003, Crete, Greece
| | - Sotiris Psilodimitrakopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, HeraklionGR71110, Crete, Greece
| | - Domna Karagogeos
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
- Medical School, Division of Basic Sciences, University of Crete, HeraklionGR71003, Crete, Greece
| | - Björn Schumacher
- Institute for Genome Stability in Ageing and Disease, Medical Faculty, University and University Hospital of Cologne, Cologne50931, Germany
- Cologne Excellence Cluster for Cellular Stress Responses in Ageing-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne50931, Germany
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, HeraklionGR71110, Crete, Greece
| | - George A. Garinis
- Department of Biology, University of Crete, HeraklionGR71409, Crete, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, HeraklionGR70013, Crete, Greece
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Tsibidis GD, Stratakis E. Influence of antireflection Si coatings on the damage threshold of fused silica upon irradiation with mid-IR femtosecond laser pulses. Opt Lett 2023; 48:4841-4844. [PMID: 37707917 DOI: 10.1364/ol.501168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 08/23/2023] [Indexed: 09/15/2023]
Abstract
Recent progress in the development of high-power mid-IR laser sources and the exciting laser driven physical phenomena associated with the irradiation of solids via ultrashort laser pulses in that spectral region are aimed to potentially create novel capabilities for material processing. In particular, the investigation of the underlying physical processes and the evaluation of the optical breakdown threshold (OBT) following irradiation of bulk dielectric materials with mid-IR femtosecond (fs) pulses have been recently presented. In this Letter, we will explore the conditions that generate sufficient carrier excitation levels which lead to damage upon irradiation of a dielectric material (SiO2) coated with antireflection (AR) semiconducting films (Si) of variable thickness with fs pulses. Simulation results demonstrate that the reflectivity and transmissivity of the Si/SiO2 are thickness dependent which can be employed to modulate the damage threshold of the substrate. The study is to provide innovative routes for selecting material sizes that can be used for antireflection coatings and applications in the mid-IR region.
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Babaliari E, Ranella A, Stratakis E. Microfluidic Systems for Neural Cell Studies. Bioengineering (Basel) 2023; 10:902. [PMID: 37627787 PMCID: PMC10451731 DOI: 10.3390/bioengineering10080902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/05/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023] Open
Abstract
Whereas the axons of the peripheral nervous system (PNS) spontaneously regenerate after an injury, the occurring regeneration is rarely successful because axons are usually directed by inappropriate cues. Therefore, finding successful ways to guide neurite outgrowth, in vitro, is essential for neurogenesis. Microfluidic systems reflect more appropriately the in vivo environment of cells in tissues such as the normal fluid flow within the body, consistent nutrient delivery, effective waste removal, and mechanical stimulation due to fluid shear forces. At the same time, it has been well reported that topography affects neuronal outgrowth, orientation, and differentiation. In this review, we demonstrate how topography and microfluidic flow affect neuronal behavior, either separately or in synergy, and highlight the efficacy of microfluidic systems in promoting neuronal outgrowth.
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Affiliation(s)
- Eleftheria Babaliari
- Foundation for Research and Technology—Hellas (F.O.R.T.H.), Institute of Electronic Structure and Laser (I.E.S.L.), Vasilika Vouton, 70013 Heraklion, Greece;
| | - Anthi Ranella
- Foundation for Research and Technology—Hellas (F.O.R.T.H.), Institute of Electronic Structure and Laser (I.E.S.L.), Vasilika Vouton, 70013 Heraklion, Greece;
| | - Emmanuel Stratakis
- Foundation for Research and Technology—Hellas (F.O.R.T.H.), Institute of Electronic Structure and Laser (I.E.S.L.), Vasilika Vouton, 70013 Heraklion, Greece;
- Department of Physics, University of Crete, 70013 Heraklion, Greece
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Krause B, Konidakis I, Stratakis E, Pötschke P. Change of Conduction Mechanism in Polymer/Single Wall Carbon Nanotube Composites upon Introduction of Ionic Liquids and Their Investigation by Transient Absorption Spectroscopy: Implication for Thermoelectric Applications. ACS Appl Nano Mater 2023; 6:13027-13036. [PMID: 37533541 PMCID: PMC10391594 DOI: 10.1021/acsanm.3c01735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 06/14/2023] [Indexed: 08/04/2023]
Abstract
Polymer composites based on polycarbonate (PC) and polyether ether ketone (PEEK) filled with single-walled carbon nanotubes (SWCNTs, 0.5-2.0 wt %) were melt-mixed to investigate their suitability for thermoelectric applications. Both types of polymer composites exhibited positive Seebeck coefficients (S), indicative for p-type thermoelectric materials. As an additive to improve the thermoelectric performance, three different ionic liquids (ILs), specifically THTDPCl, BMIMPF6, and OMIMCl, were added with the aim to change the thermoelectric conduction type of the composites from p-type to n-type. It was found that in both composite types, among the three ILs employed, only the phosphonium-based IL THTDPCl was able to activate the p- to n-type switching. Moreover, it is revealed that for the thermoelectric parameters and performance, the SWCNT:lL ratio plays a role. In the selected systems, S-values between 61.3 μV/K (PEEK/0.75 wt % SWCNT) and -37.1 μV/K (PEEK/0.75 wt % SWCNT + 3 wt % THTDPCl) were reached. In order to shed light on the physical origins of the thermoelectric properties, the PC-based composites were studied using ultrafast laser time-resolved transient absorption spectroscopy (TAS). The TAS studies revealed that the introduction of ILs in the developed PC/CNT composites leads to the formation of biexcitons when compared to the IL-free composites. Moreover, no direct correlation between S and exciton lifetimes was found for the IL-containing composites. Instead, the exciton lifetime decreases while the conductivity seems to increase due to the availability of more free-charge carriers in the polymer matrix.
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Affiliation(s)
- Beate Krause
- Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Hohe Str. 6, 01069 Dresden, Germany
| | - Ioannis Konidakis
- Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), 70013 Heraklion-Crete, Greece
| | - Emmanuel Stratakis
- Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), 70013 Heraklion-Crete, Greece
| | - Petra Pötschke
- Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Hohe Str. 6, 01069 Dresden, Germany
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Zupin L, Psilodimitrakopoulos S, Celsi F, Papadimitriou L, Ranella A, Crovella S, Ricci G, Stratakis E, Pascolo L. Upside-Down Preference in the Forskolin-Induced In Vitro Differentiation of 50B11 Sensory Neurons: A Morphological Investigation by Label-Free Non-Linear Microscopy. Int J Mol Sci 2023; 24:ijms24098354. [PMID: 37176061 PMCID: PMC10179713 DOI: 10.3390/ijms24098354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/21/2023] [Accepted: 04/28/2023] [Indexed: 05/15/2023] Open
Abstract
In this study, we revealed a peculiar morphological feature of 50B11 nociceptive sensory neurons in in vitro culture related to the forskolin-induced differentiation of these cells growing upside-down on cover glass supports. Multi-photon non-linear microscopy was applied to monitor increased neurite arborization and elongation. Under live and unstained conditions, second harmonic generation (SHG) microscopy could monitor microtubule organization inside the cells while also correlating with the detection of cellular multi-photon autofluorescence, probably derived from mitochondria metabolites. Although the differentiated cells of each compartment did not differ significantly in tubulin or multi-photon autofluorescence contents, the upturned neurons were more elongated, presenting a higher length/width cellular ratio and longer neurites, indicative of differentiated cells. SHG originating from the axons' microtubules represented a proper tool to study neurons' inverted culture in live conditions without exogenous staining. This work represents the first instance of examining neuronal cell lines growing and differentiated in an upside-down orientation, allowing a possible improvement of 50B11 as a model in physiology studies of sensory neurons in peripheric nervous system disease (e.g., Fabry disease, Friedreich ataxia, Charcot-Marie-Tooth, porphyria, type 1 diabetes, Guillain-Barré syndrome in children) and analgesic drug screening.
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Affiliation(s)
- Luisa Zupin
- Institute for Maternal and Child Health IRCCS Burlo Garofolo, 34137 Trieste, Italy
| | - Sotiris Psilodimitrakopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 70013 Heraklion, Crete, Greece
| | - Fulvio Celsi
- Institute for Maternal and Child Health IRCCS Burlo Garofolo, 34137 Trieste, Italy
| | - Lina Papadimitriou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 70013 Heraklion, Crete, Greece
| | - Anthi Ranella
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 70013 Heraklion, Crete, Greece
| | - Sergio Crovella
- Biological Science Program, Department of Biological and Environmental Sciences, College of Arts and Sciences, University of Qatar, Doha 2713, Qatar
| | - Giuseppe Ricci
- Institute for Maternal and Child Health IRCCS Burlo Garofolo, 34137 Trieste, Italy
- Department of Medicine, Surgery and Health Sciences, University of Trieste, 34129 Trieste, Italy
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 70013 Heraklion, Crete, Greece
- Department of Physics, School of Sciences and Engineering, University of Crete, 71003 Heraklion, Crete, Greece
| | - Lorella Pascolo
- Institute for Maternal and Child Health IRCCS Burlo Garofolo, 34137 Trieste, Italy
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Cheruvathoor Poulose A, Zoppellaro G, Konidakis I, Serpetzoglou E, Stratakis E, Tomanec O, Beller M, Bakandritsos A, Zbořil R. Reply to: Primary role of photothermal heating in light-driven reduction of nitroarenes. Nat Nanotechnol 2023; 18:327-328. [PMID: 36997758 DOI: 10.1038/s41565-023-01353-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 02/14/2023] [Indexed: 06/19/2023]
Affiliation(s)
- Aby Cheruvathoor Poulose
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic
| | - Ioannis Konidakis
- Institute of Electronic Structure and Laser Foundation for Research and Technology, Heraklion, Greece
| | - Efthymis Serpetzoglou
- Institute of Electronic Structure and Laser Foundation for Research and Technology, Heraklion, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser Foundation for Research and Technology, Heraklion, Greece
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic
| | | | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic.
- Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB-Technical University of Ostrava, Ostrava-Poruba, Czech Republic.
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic.
- Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB-Technical University of Ostrava, Ostrava-Poruba, Czech Republic.
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7
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Sousa JPM, Stratakis E, Mano J, Marques PAAP. Anisotropic 3D scaffolds for spinal cord guided repair: Current concepts. Biomater Adv 2023; 148:213353. [PMID: 36848743 DOI: 10.1016/j.bioadv.2023.213353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023]
Abstract
A spinal cord injury (SCI) can be caused by unforeseen events such as a fall, a vehicle accident, a gunshot, or a malignant illness, which has a significant impact on the quality of life of the patient. Due to the limited regenerative potential of the central nervous system (CNS), SCI is one of the most daunting medical challenges of modern medicine. Great advances have been made in tissue engineering and regenerative medicine, which include the transition from two-dimensional (2D) to three-dimensional (3D) biomaterials. Combinatory treatments that use 3D scaffolds may significantly enhance the repair and regeneration of functional neural tissue. In an effort to mimic the chemical and physical properties of neural tissue, scientists are researching the development of the ideal scaffold made of synthetic and/or natural polymers. Moreover, in order to restore the architecture and function of neural networks, 3D scaffolds with anisotropic properties that replicate the native longitudinal orientation of spinal cord nerve fibres are being designed. In an effort to determine if scaffold anisotropy is a crucial property for neural tissue regeneration, this review focuses on the most current technological developments relevant to anisotropic scaffolds for SCI. Special consideration is given to the architectural characteristics of scaffolds containing axially oriented fibres, channels, and pores. By analysing neural cell behaviour in vitro and tissue integration and functional recovery in animal models of SCI, the therapeutic efficacy is evaluated for its successes and limitations.
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Affiliation(s)
- Joana P M Sousa
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal; Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), Heraklion, Greece; CICECO - Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, Aveiro 3810-193, Portugal
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), Heraklion, Greece
| | - João Mano
- CICECO - Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, Aveiro 3810-193, Portugal
| | - Paula A A P Marques
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal.
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Barroca N, da Silva DM, Pinto SC, Sousa JPM, Verstappen K, Klymov A, Fernández-San-Argimiro FJ, Madarieta I, Murua O, Olalde B, Papadimitriou L, Karali K, Mylonaki K, Stratakis E, Ranella A, Marques PAAP. Interfacing reduced graphene oxide with an adipose-derived extracellular matrix as a regulating milieu for neural tissue engineering. Biomater Adv 2023; 148:213351. [PMID: 36842343 DOI: 10.1016/j.bioadv.2023.213351] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 01/31/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Enthralling evidence of the potential of graphene-based materials for neural tissue engineering is motivating the development of scaffolds using various structures related to graphene such as graphene oxide (GO) or its reduced form. Here, we investigated a strategy based on reduced graphene oxide (rGO) combined with a decellularized extracellular matrix from adipose tissue (adECM), which is still unexplored for neural repair and regeneration. Scaffolds containing up to 50 wt% rGO relative to adECM were prepared by thermally induced phase separation assisted by carbodiimide (EDC) crosslinking. Using partially reduced GO enables fine-tuning of the structural interaction between rGO and adECM. As the concentration of rGO increased, non-covalent bonding gradually prevailed over EDC-induced covalent conjugation with the adECM. Edge-to-edge aggregation of rGO favours adECM to act as a biomolecular physical crosslinker to rGO, leading to the softening of the scaffolds. The unique biochemistry of adECM allows neural stem cells to adhere and grow. Importantly, high rGO concentrations directly control cell fate by inducing the differentiation of both NE-4C cells and embryonic neural progenitor cells into neurons. Furthermore, primary astrocyte fate is also modulated as increasing rGO boosts the expression of reactivity markers while unaltering the expression of scar-forming ones.
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Affiliation(s)
- Nathalie Barroca
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal.
| | - Daniela M da Silva
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal
| | - Susana C Pinto
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal
| | - Joana P M Sousa
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal
| | - Kest Verstappen
- Radboud University Nijmegen Medical Centre, Department of Regenerative Biomaterials, 6500HB Nijmegen, the Netherlands
| | - Alexey Klymov
- Radboud University Nijmegen Medical Centre, Department of Regenerative Biomaterials, 6500HB Nijmegen, the Netherlands
| | | | - Iratxe Madarieta
- TECNALIA, Basque Research and Technology Alliance (BRTA), E20009 Donostia-San Sebastian, Spain
| | - Olatz Murua
- TECNALIA, Basque Research and Technology Alliance (BRTA), E20009 Donostia-San Sebastian, Spain
| | - Beatriz Olalde
- TECNALIA, Basque Research and Technology Alliance (BRTA), E20009 Donostia-San Sebastian, Spain
| | - Lina Papadimitriou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Kanelina Karali
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Konstantina Mylonaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Anthi Ranella
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece.
| | - Paula A A P Marques
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal.
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Sarkar AS, Konidakis I, Gagaoudakis E, Maragkakis GM, Psilodimitrakopoulos S, Katerinopoulou D, Sygellou L, Deligeorgis G, Binas V, Oikonomou IM, Komninou P, Kiriakidis G, Kioseoglou G, Stratakis E. Liquid Phase Isolation of SnS Monolayers with Enhanced Optoelectronic Properties. Adv Sci (Weinh) 2023; 10:e2201842. [PMID: 36574469 PMCID: PMC9951343 DOI: 10.1002/advs.202201842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 11/20/2022] [Indexed: 06/17/2023]
Abstract
Recent advances in atomically thin two dimensional (2D) anisotropic group IVA -VI metal monochalcogenides (MMCs) and their fascinating intrinsic properties and potential applications are hampered due to an ongoing challenge of monolayer isolation. Among the most promising MMCs, tin (II) sulfide (SnS) is an earth-abundant layered material with tunable bandgap and anisotropic physical properties, which render it extraordinary for electronics and optoelectronics. To date, however, the successful isolation of atomically thin SnS single layers at large quantities has been challenging due to the presence of strong interlayer interactions, attributed to the lone-pair electrons of sulfur. Here, a novel liquid phase exfoliation approach is reported, which enables the overcome of such strong interlayer binding energy. Specifically, it demonstrates that the synergistic action of external thermal energy with the ultrasound energy-induced hydrodynamic force in solution gives rise to the systematic isolation of highly crystalline SnS monolayers (1L-SnS). It is shown that the exfoliated 1L-SnS crystals exhibit high carrier mobility and deep-UV spectral photodetection, featuring a fast carrier response time of 400 ms. At the same time, monolayer-based SnS transistor devices fabricated from solution present a high on/off ratio, complemented with a responsivity of 6.7 × 10-3 A W-1 and remarkable stability upon prolonged operation in ambient conditions. This study opens a new avenue for large-scale isolation of highly crystalline SnS and other MMC manolayers for a wide range of applications, including extended area nanoelectronic devices, printed from solution.
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Affiliation(s)
- Abdus Salam Sarkar
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
| | - Ioannis Konidakis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
| | - E. Gagaoudakis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
| | - G. M. Maragkakis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
- Department of PhysicsUniversity of CreteHeraklion710 03Greece
| | - S. Psilodimitrakopoulos
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
| | - D. Katerinopoulou
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
- Department of PhysicsUniversity of CreteHeraklion710 03Greece
| | - L. Sygellou
- Institute of Chemical Engineering Sciences (ICE‐HT)Foundation of Research and TechnologyHellas, P.O. Box 1414Rio Patras26504Greece
| | - G. Deligeorgis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
| | - Vassilios Binas
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
- Department of PhysicsUniversity of CreteHeraklion710 03Greece
| | - Ilias M. Oikonomou
- Department of PhysicsAristotle University of ThessalonikiThessaloniki54124Greece
| | - Philomela Komninou
- Department of PhysicsAristotle University of ThessalonikiThessaloniki54124Greece
| | - G. Kiriakidis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
| | - G. Kioseoglou
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
- Department of Materials Science and TechnologyUniversity of CreteHeraklion710 03Greece
| | - E. Stratakis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklion700 13Greece
- Department of PhysicsUniversity of CreteHeraklion710 03Greece
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Angelaki D, Kavatzikidou P, Fotakis C, Stratakis E, Ranella A. Laser-Structured Si and PLGA Inhibit the Neuro2a Differentiation in Mono- and Co-Culture with Glia. Tissue Eng Regen Med 2022; 20:111-125. [PMID: 36538193 PMCID: PMC9852401 DOI: 10.1007/s13770-022-00497-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/31/2022] [Accepted: 09/25/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The first step towards a successful neural tissue engineering therapy is the development of an appropriate scaffold and the in vitro study of the cellular response onto it. METHODS Here, we fabricated nano- and micro- patterned Si surfaces via direct ultrafast laser irradiation, as well as their replicas in the biodegradable poly(lactide-co-glycolide), in order to use them as culture substrates for neuronal cells. The differentiation of neuro2a cells on the Si platforms and their replicas was studied both in a mono-culture and in a co-culture with glial cells (Schwann-SW10). RESULTS It was found that the substrate's roughness inhibits the differentiation of the neuronal cells even in the presence of the differentiation medium, and the higher the roughness is, the more the differentiation gets limited. CONCLUSION Our results highlight the importance of the substrate's topography for the controlled growth and differentiation of the neuronal cells and their further study via protein screening methods could shed light on the factors that lead to limited differentiation; thus, contributing to the long standing request for culture substrates that induce cells to differentiate.
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Affiliation(s)
- Despoina Angelaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology- Hellas (IESL- FORTH), 711 10 Heraklion, Greece ,Department of Physics, University of Crete, 710 03 Heraklion, Greece
| | - Paraskevi Kavatzikidou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology- Hellas (IESL- FORTH), 711 10 Heraklion, Greece
| | - Costas Fotakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology- Hellas (IESL- FORTH), 711 10 Heraklion, Greece ,Department of Physics, University of Crete, 710 03 Heraklion, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology- Hellas (IESL- FORTH), 711 10 Heraklion, Greece ,Department of Physics, University of Crete, 710 03 Heraklion, Greece
| | - Anthi Ranella
- Institute of Electronic Structure and Laser, Foundation for Research and Technology- Hellas (IESL- FORTH), 711 10 Heraklion, Greece
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Florian C, Fuentes-Edfuf Y, Skoulas E, Stratakis E, Sanchez-Cortes S, Solis J, Siegel J. Influence of Heat Accumulation on Morphology Debris Deposition and Wetting of LIPSS on Steel upon High Repetition Rate Femtosecond Pulses Irradiation. Materials (Basel) 2022; 15:7468. [PMID: 36363059 PMCID: PMC9656394 DOI: 10.3390/ma15217468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/18/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
The fabrication of laser-induced periodic surface structures (LIPSS) over extended areas at high processing speeds requires the use of high repetition rate femtosecond lasers. It is known that industrially relevant materials such as steel experience heat accumulation when irradiated at repetition rates above some hundreds of kHz, and significant debris redeposition can take place. However, there are few studies on how the laser repetition rate influences both the debris deposition and the final LIPSS morphology. In this work, we present a study of fs laser-induced fabrication of low spatial frequency LIPSS (LSFL), with pulse repetition rates ranging from 10 kHz to 2 MHz on commercially available steel. The morphology of the laser-structured areas as well as the redeposited debris was characterized by scanning electron microscopy (SEM) and µ-Raman spectroscopy. To identify repetition rate ranges where heat accumulation is present during the irradiations, we developed a simple heat accumulation model that solves the heat equation in 1 dimension implementing a Forward differencing in Time and Central differencing in Space (FTCS) scheme. Contact angle measurements with water demonstrated the influence of heat accumulation and debris on the functional wetting behavior. The findings are directly relevant for the processing of metals using high repetition rate femtosecond lasers, enabling the identification of optimum conditions in terms of desired morphology, functionality, and throughput.
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Affiliation(s)
- Camilo Florian
- Instituto de Óptica (IO-CSIC), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 121, 28006 Madrid, Spain
| | - Yasser Fuentes-Edfuf
- Instituto de Óptica (IO-CSIC), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 121, 28006 Madrid, Spain
| | - Evangelos Skoulas
- Instituto de Estructura de la Materia (CSIC), Consejo Superior de Investigaciones Científicas, Serrano 121, 28006 Madrid, Spain
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Greece
| | - Santiago Sanchez-Cortes
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Greece
| | - Javier Solis
- Instituto de Óptica (IO-CSIC), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 121, 28006 Madrid, Spain
| | - Jan Siegel
- Instituto de Óptica (IO-CSIC), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 121, 28006 Madrid, Spain
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Manganas P, Kavatzikidou P, Kordas A, Babaliari E, Stratakis E, Ranella A. The role of mechanobiology on the Schwann cell response: A tissue engineering perspective. Front Cell Neurosci 2022; 16:948454. [PMID: 36035260 PMCID: PMC9399718 DOI: 10.3389/fncel.2022.948454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/14/2022] [Indexed: 11/13/2022] Open
Abstract
Schwann cells (SCs), the glial cells of the peripheral nervous system (PNS), do not only form myelin sheaths thereby insulating the electrical signal propagated by the axons, but also play an essential role in the regeneration of injured axons. SCs are inextricably connected with their extracellular environment and the mechanical stimuli that are received determine their response during development, myelination and injuries. To this end, the mechanobiological response of SCs is being actively researched, as it can determine the suitability of fabricated scaffolds for tissue engineering and regenerative medicine applications. There is growing evidence that SCs are sensitive to changes in the mechanical properties of the surrounding environment (such as the type of material, its elasticity and stiffness), different topographical features provided by the environment, as well as shear stress. In this review, we explore how different mechanical stimuli affect SC behaviour and highlight the importance of exploring many different avenues when designing scaffolds for the repair of PNS injuries.
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Affiliation(s)
- Phanee Manganas
- Tissue Engineering, Regenerative Medicine and Immunoengineering Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
| | - Paraskevi Kavatzikidou
- Tissue Engineering, Regenerative Medicine and Immunoengineering Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
- Ultrafast Laser Micro and Nano Processing Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
| | - Antonis Kordas
- Tissue Engineering, Regenerative Medicine and Immunoengineering Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion, Greece
| | - Eleftheria Babaliari
- Tissue Engineering, Regenerative Medicine and Immunoengineering Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
- Ultrafast Laser Micro and Nano Processing Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
| | - Emmanuel Stratakis
- Ultrafast Laser Micro and Nano Processing Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
| | - Anthi Ranella
- Tissue Engineering, Regenerative Medicine and Immunoengineering Laboratory, Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion, Greece
- *Correspondence: Anthi Ranella
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Cheruvathoor Poulose A, Zoppellaro G, Konidakis I, Serpetzoglou E, Stratakis E, Tomanec O, Beller M, Bakandritsos A, Zbořil R. Fast and selective reduction of nitroarenes under visible light with an earth-abundant plasmonic photocatalyst. Nat Nanotechnol 2022; 17:485-492. [PMID: 35347273 PMCID: PMC9117130 DOI: 10.1038/s41565-022-01087-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Reduction of nitroaromatics to the corresponding amines is a key process in the fine and bulk chemicals industry to produce polymers, pharmaceuticals, agrochemicals and dyes. However, their effective and selective reduction requires high temperatures and pressurized hydrogen and involves noble metal-based catalysts. Here we report on an earth-abundant, plasmonic nano-photocatalyst, with an excellent reaction rate towards the selective hydrogenation of nitroaromatics. With solar light as the only energy input, the chalcopyrite catalyst operates through the combined action of hot holes and photothermal effects. Ultrafast laser transient absorption and light-induced electron paramagnetic resonance spectroscopies have unveiled the energy matching of the hot holes in the valence band of the catalyst with the frontier orbitals of the hydrogen and electron donor, via a transient coordination intermediate. Consequently, the reusable and sustainable copper-iron-sulfide (CuFeS2) catalyst delivers previously unattainable turnover frequencies, even in large-scale reactions, while the cost-normalized production rate stands an order of magnitude above the state of the art.
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Affiliation(s)
- Aby Cheruvathoor Poulose
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic.
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic
| | - Ioannis Konidakis
- Institute of Electronic Structure and Laser Foundation for Research and Technology-Hellas, Heraklion, Greece
| | - Efthymis Serpetzoglou
- Institute of Electronic Structure and Laser Foundation for Research and Technology-Hellas, Heraklion, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser Foundation for Research and Technology-Hellas, Heraklion, Greece
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic
| | | | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic.
- Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB-Technical University of Ostrava, Ostrava-Poruba, Czech Republic.
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University, Olomouc, Czech Republic.
- Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB-Technical University of Ostrava, Ostrava-Poruba, Czech Republic.
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14
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Tsimvrakidis K, Konidakis I, Stratakis E. Laser-Induced Erasable and Re-Writable Waveguides within Silver Phosphate Glasses. Materials (Basel) 2022; 15:ma15092983. [PMID: 35591318 PMCID: PMC9105672 DOI: 10.3390/ma15092983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 02/04/2023]
Abstract
Femtosecond direct laser writing is a well-established and robust technique for the fabrication of photonic structures. Herein, we report on the fabrication of buried waveguides in AgPO3 silver metaphosphate glasses, as well as, on the erase and re-writing of those structures, by means of a single femtosecond laser source. Based on the fabrication procedure, the developed waveguides can be erased and readily re-inscribed upon further femtosecond irradiation under controlled conditions. Namely, for the initial waveguide writing the employed laser irradiation power was 2 J/cm2 with a scanning speed of 5 mm/s and a repetition rate of 200 kHz. Upon enhancing the power to 16 J/cm2 while keeping constant the scanning speed and reducing the repetition rate to 25 kHz, the so formed patterns were readily erased. Then, upon using a laser power of 2 J/cm2 with a scanning speed of 1 mm/s and a repetition rate of 200 kHz the waveguide patterns were re-written inside the glass. Scanning electron microscopy (SEM) images at the cross-section of the processed glasses, combined with spatial Raman analysis revealed that the developed write/erase/re-write cycle, does not cause any structural modification to the phosphate network, rendering the fabrication process feasible for reversible optoelectronic applications. Namely, it is proposed that this non-ablative phenomenon lies on the local relaxation of the glass network caused by the heat deposited upon pulsed laser irradiation. The resulted waveguide patterns Our findings pave the way towards new photonic applications involving infinite cycles of write/erase/re-write processes without the need of intermediate steps of typical thermal annealing treatments.
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Affiliation(s)
| | - Ioannis Konidakis
- Correspondence: (K.T.); (I.K.); Tel.: +30-2810392943 (K.T.); +30-2810392944 (I.K.)
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15
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Konidakis I, Karagiannaki A, Stratakis E. Advanced composite glasses with metallic, perovskite, and two-dimensional nanocrystals for optoelectronic and photonic applications. Nanoscale 2022; 14:2966-2989. [PMID: 35142770 DOI: 10.1039/d1nr07711b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This article reviews the tremendous advancement of the optoelectronic and photonic properties of inorganic oxide glasses upon the incorporation of metallic, perovskite, and two-dimensional nanocrystals within their matrix. In the first part, we present the exploitation of typical inorganic oxide glasses as hosting platforms for the incorporation of metallic nanoparticles. Such a method offers tremendous advantages in terms of inducing plasmonic features that enable the tunability of the photonic properties of the embedded materials. Along similar lines, due to their exceptional photoluminescence properties all inorganic lead halide perovskites show enormous potential for next generation light-emitting, optoelectronic and photonic devices. To date, however, their usage is limited significantly by their poor chemical stability upon exposure to moisture, and lead toxicity issues. A recent and highly promising approach for overcoming these important challenges is the encapsulation of perovskite nanocrystals within inorganic oxide glasses. Based on this, in the second section we focus on the recent advancements in perovskite glasses in terms of the developed fabrication procedures and the resulting optoelectronic features, while considering the production limitations. In the last part, we consider the development of composite two-dimensional materials glass architectures in terms of the available synthesis routes and the novelty of their optical and emission features. Finally, future perspectives on the described composite glass systems in terms of potential applications are summarized.
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Affiliation(s)
- I Konidakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 70013 Heraklion-Crete, Greece.
| | - A Karagiannaki
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 70013 Heraklion-Crete, Greece.
| | - E Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 70013 Heraklion-Crete, Greece.
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16
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Kostopoulou A, Brintakis K, Sygletou M, Savva K, Livakas N, Pantelaiou MA, Dang Z, Lappas A, Manna L, Stratakis E. Laser-Induced Morphological and Structural Changes of Cesium Lead Bromide Nanocrystals. Nanomaterials 2022; 12:nano12040703. [PMID: 35215031 PMCID: PMC8879588 DOI: 10.3390/nano12040703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 02/01/2023]
Abstract
Metal halide perovskite nanocrystals, an emerging class of materials for advanced photonic and optoelectronic applications, are mainly fabricated with colloidal chemistry routes. On the quest for new properties according to application needs, new perovskite systems of various morphologies and levels of doping and alloying have been developed, often also involving post-synthesis reactions. Recently, laser irradiation in liquids has been utilized as a fast method to synthesize or transform materials and interesting laser-induced transformations on nanocrystals were induced. These studies in general have been limited to small nanocrystals (~15 nm). In the case of halide perovskites, fragmentation or anion exchange have been observed in such laser-based processes, but no crystal structure transformations were actually observed or deliberately studied. Nanocrystals are more sensitive to light exposure compared to the corresponding bulk crystals. Additional factors, such as size, morphology, the presence of impurities, and others, can intricately affect the photon absorption and heat dissipation in nanocrystal suspensions during laser irradiation. All these factors can play an important role in the final morphologies and in the time required for these transformations to unfold. In the present work, we have employed a 513 nm femtosecond (fs) laser to induce different transformations in large nanocrystals, in which two phases coexist in the same particle (Cs4PbBr6/CsPbBr3 nanohexagons of ~100 nm), dispersed in dichlorobenzene. These transformations include: (i) the exfoliation of the primary nanohexagons and partial anion exchange; (ii) fragmentation in smaller nanocubes and partial anion exchange; (iii) side-by-side-oriented attachment, fusion, and formation of nanoplatelets and complete anion exchange; (iv) side-by-side attachment, fusion, and formation of nanosheets. Partial or complete Br-Cl anion exchange in the above transformations was triggered by the partial degradation of dichlorobenzene. In addition to the detailed analysis of the various nanocrystal morphologies observed in the various transformations, the structure–photoluminescence relationships for the different samples were analyzed and discussed.
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Affiliation(s)
- Athanasia Kostopoulou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
- Correspondence: (A.K.); (K.B.); (E.S.); Tel.: +30-2810-391874 (A.K.); +30-2810-391874 (K.B.); +30-2810-391274 (E.S.)
| | - Konstantinos Brintakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
- Correspondence: (A.K.); (K.B.); (E.S.); Tel.: +30-2810-391874 (A.K.); +30-2810-391874 (K.B.); +30-2810-391274 (E.S.)
| | - Maria Sygletou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
| | - Kyriaki Savva
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
| | - Nikolaos Livakas
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
| | - Michaila Akathi Pantelaiou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
| | - Zhiya Dang
- Nanochemistry, Istituto Italiano di Tecnologia, 16163 Genova, Italy; (Z.D.); (L.M.)
| | - Alexandros Lappas
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, 16163 Genova, Italy; (Z.D.); (L.M.)
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 71110 Heraklion, Greece; (M.S.); (K.S.); (N.L.); (M.A.P.); (A.L.)
- Department of Physics, University of Crete, 71003 Heraklion, Greece
- Correspondence: (A.K.); (K.B.); (E.S.); Tel.: +30-2810-391874 (A.K.); +30-2810-391874 (K.B.); +30-2810-391274 (E.S.)
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Vlahou M, Fraggelakis F, Manganas P, Tsibidis GD, Ranella A, Stratakis E. Fabrication of Biomimetic 2D Nanostructures through Irradiation of Stainless Steel Surfaces with Double Femtosecond Pulses. Nanomaterials 2022; 12:nano12040623. [PMID: 35214951 PMCID: PMC8876691 DOI: 10.3390/nano12040623] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 02/06/2023]
Abstract
Femtosecond laser induced changes on the topography of stainless steel with double pulses is investigated to reveal the role of parameters such as the fluence, the energy dose and the interpulse delay on the features of the produced patterns. Our results indicate that short pulse separation (Δτ = 5 ps) favors the formation of 2D Low Spatially Frequency Laser Induced Periodic Surface Structures (LSFL) while longer interpulse delays (Δτ = 20 ps) lead to 2D High Spatially Frequency LIPSS (HSFL). The detailed investigation is complemented with an analysis of the produced surface patterns and characterization of their wetting and cell-adhesion properties. A correlation between the surface roughness and the contact angle is presented which confirms that topographies of variable roughness and complexity exhibit different wetting properties. Furthermore, our analysis indicates that patterns with different spatial characteristics demonstrate variable cell adhesion response which suggests that the methodology can be used as a strategy towards the fabrication of tailored surfaces for the development of functional implants.
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Affiliation(s)
- Matina Vlahou
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece; (M.V.); (P.M.); (G.D.T.); (A.R.)
| | - Fotis Fraggelakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece; (M.V.); (P.M.); (G.D.T.); (A.R.)
- Correspondence: (F.F.); (E.S.)
| | - Phanee Manganas
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece; (M.V.); (P.M.); (G.D.T.); (A.R.)
| | - George D. Tsibidis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece; (M.V.); (P.M.); (G.D.T.); (A.R.)
| | - Anthi Ranella
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece; (M.V.); (P.M.); (G.D.T.); (A.R.)
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013 Heraklion, Crete, Greece; (M.V.); (P.M.); (G.D.T.); (A.R.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
- Correspondence: (F.F.); (E.S.)
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Anastasiadis SH, Chrissopoulou K, Stratakis E, Kavatzikidou P, Kaklamani G, Ranella A. How the Physicochemical Properties of Manufactured Nanomaterials Affect Their Performance in Dispersion and Their Applications in Biomedicine: A Review. Nanomaterials 2022; 12:nano12030552. [PMID: 35159897 PMCID: PMC8840392 DOI: 10.3390/nano12030552] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/29/2022] [Accepted: 02/01/2022] [Indexed: 11/21/2022]
Abstract
The growth in novel synthesis methods and in the range of possible applications has led to the development of a large variety of manufactured nanomaterials (MNMs), which can, in principle, come into close contact with humans and be dispersed in the environment. The nanomaterials interact with the surrounding environment, this being either the proteins and/or cells in a biological medium or the matrix constituent in a dispersion or composite, and an interface is formed whose properties depend on the physicochemical interactions and on colloidal forces. The development of predictive relationships between the characteristics of individual MNMs and their potential practical use critically depends on how the key parameters of MNMs, such as the size, shape, surface chemistry, surface charge, surface coating, etc., affect the behavior in a test medium. This relationship between the biophysicochemical properties of the MNMs and their practical use is defined as their functionality; understanding this relationship is very important for the safe use of these nanomaterials. In this mini review, we attempt to identify the key parameters of nanomaterials and establish a relationship between these and the main MNM functionalities, which would play an important role in the safe design of MNMs; thus, reducing the possible health and environmental risks early on in the innovation process, when the functionality of a nanomaterial and its toxicity/safety will be taken into account in an integrated way. This review aims to contribute to a decision tree strategy for the optimum design of safe nanomaterials, by going beyond the compromise between functionality and safety.
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Affiliation(s)
- Spiros H. Anastasiadis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (K.C.); (E.S.); (P.K.); (G.K.); (A.R.)
- Department of Chemistry, University of Crete, 700 13 Heraklion, Crete, Greece
- Correspondence: ; Tel.: +30-2810-391466
| | - Kiriaki Chrissopoulou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (K.C.); (E.S.); (P.K.); (G.K.); (A.R.)
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (K.C.); (E.S.); (P.K.); (G.K.); (A.R.)
- Department of Physics, University of Crete, 700 13 Heraklion, Crete, Greece
| | - Paraskevi Kavatzikidou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (K.C.); (E.S.); (P.K.); (G.K.); (A.R.)
| | - Georgia Kaklamani
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (K.C.); (E.S.); (P.K.); (G.K.); (A.R.)
| | - Anthi Ranella
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100, 700 13 Heraklion, Crete, Greece; (K.C.); (E.S.); (P.K.); (G.K.); (A.R.)
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Chalmantzi V, Simitzi C, Papadopoulos A, Bagli E, Murphy C, Stratakis E, Fotsis T. Culturing Human Pluripotent Stem Cells on Micropatterned Silicon Surfaces. Methods Mol Biol 2022; 2454:49-59. [PMID: 34907510 DOI: 10.1007/7651_2021_428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Human pluripotent stem cell culture conditions are constantly being optimized, thus providing insight to the environmental cues that affect cell choices. A wide variety of media, coating materials, and substrates is now available for use, serving different scientific needs. Factors such as material stiffness, roughness, and topography are being recognized to contribute or even direct the acquisition of specific phenotypes. Here, we describe the use of patterned silicon substrates coated with Matrigel for the propagation and differentiation of human pluripotent stem cells.
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Affiliation(s)
- Varvara Chalmantzi
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology-Hellas, Ioannina, Greece
| | - Chara Simitzi
- Institute of Electronic Structure and Laser (IESL), Foundation of Research and Technology Hellas (FORTH), Vassilika Vouton, Heraklion, Greece
- Institute of Materials Discovery, University College London, London, UK
| | - Angelos Papadopoulos
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology-Hellas, Ioannina, Greece
| | - Eleni Bagli
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology-Hellas, Ioannina, Greece
| | - Carol Murphy
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, UK
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology-Hellas, Ioannina, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation of Research and Technology Hellas (FORTH), Vassilika Vouton, Heraklion, Greece.
- Materials Science and Technology Department, University of Crete, Vassilika Voutes, Heraklion, Greece.
| | - Theodore Fotsis
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology-Hellas, Ioannina, Greece.
- Laboratory of Biological Chemistry, Medical School, University of Ioannina, Ioannina, Greece.
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20
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Maragkaki S, Lingos PC, Tsibidis GD, Deligeorgis G, Stratakis E. Impact of Pre-Patterned Structures on Features of Laser-Induced Periodic Surface Structures. Molecules 2021; 26:7330. [PMID: 34885913 PMCID: PMC8658884 DOI: 10.3390/molecules26237330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/16/2022] Open
Abstract
The efficiency of light coupling to surface plasmon polariton (SPP) represents a very important issue in plasmonics and laser fabrication of topographies in various solids. To illustrate the role of pre-patterned surfaces and impact of laser polarisation in the excitation of electromagnetic modes and periodic pattern formation, Nickel surfaces are irradiated with femtosecond laser pulses of polarisation perpendicular or parallel to the orientation of the pre-pattern ridges. Experimental results indicate that for polarisation parallel to the ridges, laser induced periodic surface structures (LIPSS) are formed perpendicularly to the pre-pattern with a frequency that is independent of the distance between the ridges and periodicities close to the wavelength of the excited SPP. By contrast, for polarisation perpendicular to the pre-pattern, the periodicities of the LIPSS are closely correlated to the distance between the ridges for pre-pattern distance larger than the laser wavelength. The experimental observations are interpreted through a multi-scale physical model in which the impact of the interference of the electromagnetic modes is revealed.
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Affiliation(s)
- Stella Maragkaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (P.C.L.); (G.D.T.); (G.D.)
| | - Panagiotis C. Lingos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (P.C.L.); (G.D.T.); (G.D.)
| | - George D. Tsibidis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (P.C.L.); (G.D.T.); (G.D.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
| | - George Deligeorgis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (P.C.L.); (G.D.T.); (G.D.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (P.C.L.); (G.D.T.); (G.D.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
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21
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Sarkar AS, Stratakis E. Dispersion behaviour of two dimensional monochalcogenides. J Colloid Interface Sci 2021; 594:334-341. [PMID: 33773385 DOI: 10.1016/j.jcis.2021.02.081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 02/03/2021] [Accepted: 02/18/2021] [Indexed: 11/15/2022]
Abstract
Solution processable two-dimensional (2D) materials have provided an ideal platform for both fundamental studies and wearable electronic applications. Apart from graphene and 2D dichalcogenides, IVA-VI metal monochalcogenides (MMCs) has emerged recently as a promising candidate for next generation electronic applications. However, the dispersion behavior, which is crucial for the quality, solubility and stability of MMCs, has been quite unexplored. Here, the exfoliation and the dispersion behavior of Germanium (II) monosulfide (GeS) and Tin (II) monosulfide (SnS) nanosheets has been investigated in a wide range of organic solvents. Nine different organic solvents were examined and analyzed, considering the solvent polarity, surface tension, and Hansen solubility parameters. A significant yield of isolated GeS and SnS flakes, namely ~16.4 and ~23.08 μg/ml in 2-propanol and N-Methyl-2-pyrrolidone respectively were attained. The isolated flakes are few-layers nanosheets with lateral sizes over a few hundreds of nanometers. The MMC colloids exhibit long-term stability, suggesting the MMCs applicability for scalable solution processable printed electronic device applications.
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Affiliation(s)
- Abdus Salam Sarkar
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, 700 13 Crete, Greece.
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, 700 13 Crete, Greece; Physics Department, University of Crete, Heraklion, 710 03 Crete, Greece.
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22
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Babaliari E, Kavatzikidou P, Mitraki A, Papaharilaou Y, Ranella A, Stratakis E. Combined effect of shear stress and laser-patterned topography on Schwann cell outgrowth: synergistic or antagonistic? Biomater Sci 2021; 9:1334-1344. [PMID: 33367414 DOI: 10.1039/d0bm01218a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Although the peripheral nervous system exhibits a higher rate of regeneration than that of the central nervous system through a spontaneous regeneration after injury, the functional recovery is fairly infrequent and misdirected. Thus, the development of successful methods to guide neuronal outgrowth, in vitro, is of great importance. In this study, a precise flow controlled microfluidic system with specific custom-designed chambers, incorporating laser-microstructured polyethylene terephthalate (PET) substrates comprising microgrooves, was fabricated to assess the combined effect of shear stress and topography on Schwann cells' behavior. The microgrooves were positioned either parallel or perpendicular to the direction of the flow inside the chambers. Additionally, the cell culture results were combined with computational flow simulations to calculate accurately the shear stress values. Our results demonstrated that wall shear stress gradients may be acting either synergistically or antagonistically depending on the substrate groove orientation relative to the flow direction. The ability to control cell alignment in vitro could potentially be used in the fields of neural tissue engineering and regenerative medicine.
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Affiliation(s)
- Eleftheria Babaliari
- Foundation for Research and Technology - Hellas (F.O.R.T.H.), Institute of Electronic Structure and Laser (I.E.S.L.) Vassilika Vouton, 70013 Heraklion, Greece.
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23
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Xydias D, Ziakas G, Psilodimitrakopoulos S, Lemonis A, Bagli E, Fotsis T, Gravanis A, Tzeranis DS, Stratakis E. Three-dimensional characterization of collagen remodeling in cell-seeded collagen scaffolds via polarization second harmonic generation. Biomed Opt Express 2021; 12:1136-1153. [PMID: 33680563 PMCID: PMC7901316 DOI: 10.1364/boe.411501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/24/2020] [Accepted: 12/01/2020] [Indexed: 05/08/2023]
Abstract
In this study, we use non-linear imaging microscopy to characterize the structural properties of porous collagen-GAG scaffolds (CGS) seeded with human umbilical vein endothelial cells (HUVECs), as well as human mesenchymal stem cells (hMSCs), a co-culture previously reported to form vessel-like structures inside CGS. The evolution of the resulting tissue construct was monitored over 10 days via simultaneous two- and three-photon excited fluorescence microscopy. Time-lapsed 2- and 3-photon excited fluorescence imaging was utilized to monitor the temporal evolution of the vascular-like structures up to 100 µm inside the scaffold up to 10 days post-seeding. 3D polarization-dependent second harmonic generation (PSHG) was utilized to monitor collagen-based scaffold remodeling and determine collagen fibril orientation up to 200 µm inside the scaffold. We demonstrate that polarization-dependent second harmonic generation can provide a novel way to quantify the reorganization of the collagen architecture in CGS simultaneously with key biomechanical interactions between seeded cells and CGS that regulate the formation of vessel-like structures inside 3D tissue constructs. A comparison between samples at different days in vitro revealed that gradually, the scaffolds developed an orthogonal net-like architecture, previously found in real skin.
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Affiliation(s)
- Dionysios Xydias
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Greece
- Department of Materials Science and Technology, School of Sciences and Engineering, University of Crete, Greece
| | - Georgios Ziakas
- Department of Materials Science and Technology, School of Sciences and Engineering, University of Crete, Greece
| | | | - Andreas Lemonis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Greece
| | - Eleni Bagli
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Ioannina, Greece
| | - Theodore Fotsis
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Ioannina, Greece
| | - Achille Gravanis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Greece
- Department of Pharmacology, School of Medicine, University of Crete, Greece
| | - Dimitrios S. Tzeranis
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Greece
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Cyprus, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Greece
- Department of Physics, School of Sciences and Engineering, University of Crete, Greece
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24
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Seo J, Lanara C, Choi JY, Kim J, Cho H, Chang Y, Kang K, Stratakis E, Choi IS. Neuronal Migration on Silicon Microcone Arrays with Different Pitches. Adv Healthc Mater 2021; 10:e2000583. [PMID: 32815647 DOI: 10.1002/adhm.202000583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/22/2020] [Indexed: 11/10/2022]
Abstract
Neuronal migration is a complicated but fundamental process for proper construction and functioning of neural circuits in the brain. Many in vivo studies have suggested the involvement of environmental physical features of a neuron in its migration, but little effort has been made for the in vitro demonstration of topography-driven neuronal migration. This work investigates migratory behaviors of primary hippocampal neurons on a silicon microcone (SiMC) array that presents 14 different pitch domains (pitch: 2.5-7.3 µm). Neuronal migration becomes the maximum at the pitch of around 3 µm, with an upper migration threshold of about 4 µm. Immunocytochemical studies indicate that the speed and direction of migration, as well as its probability of occurrence, are correlated with the morphology of the neuron, which is dictated by the pitch and shape of underlying SiMC structures. In addition to the effects on neuronal migration, the real-time imaging of migrating neurons on the topographical substrate reveals new in vitro modes of neuronal migration, which have not been observed on the conventional flat culture plate, but been suggested by in vivo studies.
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Affiliation(s)
- Jeongyeon Seo
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Christina Lanara
- Institute of Electronic Structure and Laser Foundation for Research and Technology Hellas (FORTH) Nikolaou Plastira 100 Heraklion Crete GR‐70013 Greece
| | - Ji Yu Choi
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Jungnam Kim
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Hyeoncheol Cho
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
| | - Young‐Tae Chang
- Department of Chemistry POSTECH Center for Self‐Assembly and Complexity Institute for Basic Science (IBS) Pohang 37673 Korea
| | - Kyungtae Kang
- Department of Applied Chemistry Kyung Hee University Yongin Gyeonggi 17104 Korea
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser Foundation for Research and Technology Hellas (FORTH) Nikolaou Plastira 100 Heraklion Crete GR‐70013 Greece
| | - Insung S. Choi
- Center for Cell‐Encapsulation Research Department of Chemistry KAIST Daejeon 34141 Korea
- Department of Bio and Brain Engineering KAIST Daejeon 34141 Korea
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25
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Chukova O, Nedilko SA, Nedilko SG, Voitenko T, Androulidaki M, Manousaki A, Papadopoulos A, Savva K, Stratakis E. Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates. Appl Nanosci 2020. [DOI: 10.1007/s13204-020-01503-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Abstract
The family of emerging low-symmetry and structural in-plane anisotropic two-dimensional (2D) materials has been expanding rapidly in recent years. As an important emerging anisotropic 2D material, the black phosphorene analog group IVA-VI metal monochalcogenides (MMCs) have been surged recently due to their distinctive crystalline symmetries, exotic in-plane anisotropic electronic and optical response, earth abundance, and environmentally friendly characteristics. In this article, the recent research advancements in the field of anisotropic 2D MMCs are reviewed. At first, the unique wavy crystal structures together with the optical and electronic properties of such materials are discussed. The Review continues with the various methods adopted for the synthesis of layered MMCs including micromechanical and liquid phase exfoliation as well as physical vapor deposition. The last part of the article focuses on the application of the structural anisotropic response of 2D MMCs in field effect transistors, photovoltaic cells nonlinear optics, and valleytronic devices. Besides presenting the significant research in the field of this emerging class of 2D materials, this Review also delineates the existing limitations and discusses emerging possibilities and future prospects.
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Affiliation(s)
- Abdus Salam Sarkar
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklionCrete700 13Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and LaserFoundation for Research and Technology‐HellasHeraklionCrete700 13Greece
- Physics DepartmentUniversity of CreteHeraklionCrete710 03Greece
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27
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Žemaitis A, Mimidis A, Papadopoulos A, Gečys P, Račiukaitis G, Stratakis E, Gedvilas M. Controlling the wettability of stainless steel from highly-hydrophilic to super-hydrophobic by femtosecond laser-induced ripples and nanospikes. RSC Adv 2020; 10:37956-37961. [PMID: 35515197 PMCID: PMC9057189 DOI: 10.1039/d0ra05665k] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/06/2020] [Indexed: 12/03/2022] Open
Abstract
Results on the manipulation of the wetting properties of stainless steel alloy surface by ultrashort pulse laser texturing are presented. The wide range of water droplet contact angles from highly-hydrophilic to super-hydrophobic was achieved by generation of laser-induced periodic surface structures (LIPSS) and nanospikes. In particular, the wetting state was controlled by accumulated laser fluence, which determines the carbon/oxygen content and nano-texture type of the surface after laser treatment. A super-hydrophobic water-repelling surface was generated. The simple, single-step laser processing technology was demonstrated as a promising tool for the large-scale industrial production of self-cleaning stainless steel. Results on the manipulation of the wetting properties of stainless steel alloy surface by ultrashort pulse laser texturing are presented.![]()
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Affiliation(s)
- Andrius Žemaitis
- Department of Laser Technologies (LTS), Center for Physical Sciences and Technology (FTMC) Savanoriu Ave. 231 02300 Vilnius Lithuania
| | - Alexandros Mimidis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH) N. Plastira 100, Vassilika Vouton 70013 Heraklion Crete Greece
| | - Antonis Papadopoulos
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH) N. Plastira 100, Vassilika Vouton 70013 Heraklion Crete Greece
| | - Paulius Gečys
- Department of Laser Technologies (LTS), Center for Physical Sciences and Technology (FTMC) Savanoriu Ave. 231 02300 Vilnius Lithuania
| | - Gediminas Račiukaitis
- Department of Laser Technologies (LTS), Center for Physical Sciences and Technology (FTMC) Savanoriu Ave. 231 02300 Vilnius Lithuania
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH) N. Plastira 100, Vassilika Vouton 70013 Heraklion Crete Greece
| | - Mindaugas Gedvilas
- Department of Laser Technologies (LTS), Center for Physical Sciences and Technology (FTMC) Savanoriu Ave. 231 02300 Vilnius Lithuania
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28
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Sarkar AS, Konidakis I, Demeridou I, Serpetzoglou E, Kioseoglou G, Stratakis E. Robust B-exciton emission at room temperature in few-layers of MoS 2:Ag nanoheterojunctions embedded into a glass matrix. Sci Rep 2020; 10:15697. [PMID: 32973224 PMCID: PMC7518262 DOI: 10.1038/s41598-020-72899-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 08/28/2020] [Indexed: 01/30/2023] Open
Abstract
Tailoring the photoluminescence (PL) properties in two-dimensional (2D) molybdenum disulfide (MoS2) crystals using external factors is critical for its use in valleytronic, nanophotonic and optoelectronic applications. Although significant effort has been devoted towards enhancing or manipulating the excitonic emission in MoS2 monolayers, the excitonic emission in few-layers MoS2 has been largely unexplored. Here, we put forward a novel nano-heterojunction system, prepared with a non-lithographic process, to enhance and control such emission. It is based on the incorporation of few-layers MoS2 into a plasmonic silver metaphosphate glass (AgPO3) matrix. It is shown that, apart from the enhancement of the emission of both A- and B-excitons, the B-excitonic emission dominates the PL intensity. In particular, we observe an almost six-fold enhancement of the B-exciton emission, compared to control MoS2 samples. This enhanced PL at room temperature is attributed to an enhanced exciton-plasmon coupling and it is supported by ultrafast time-resolved spectroscopy that reveals plasmon-enhanced electron transfer that takes place in Ag nanoparticles-MoS2 nanoheterojunctions. Our results provide a great avenue to tailor the emission properties of few-layers MoS2, which could find application in emerging valleytronic devices working with B excitons.
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Affiliation(s)
- Abdus Salam Sarkar
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 700 13, Heraklion, Crete, Greece.
| | - Ioannis Konidakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 700 13, Heraklion, Crete, Greece
| | - Ioanna Demeridou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 700 13, Heraklion, Crete, Greece
- Physics Department, University of Crete, 710 03, Heraklion, Crete, Greece
| | - Efthymis Serpetzoglou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 700 13, Heraklion, Crete, Greece
- Physics Department, University of Crete, 710 03, Heraklion, Crete, Greece
| | - George Kioseoglou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 700 13, Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, 710 03, Heraklion, Crete, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, 700 13, Heraklion, Crete, Greece.
- Physics Department, University of Crete, 710 03, Heraklion, Crete, Greece.
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29
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Barmina EV, Mukhametyanov BA, Uvarov OV, Vlasov II, Kudryavtsev OS, Kalachev YL, Skoulas E, Kourmoulakis G, Voronov VV, Stratakis E, Shafeev GA. Laser-Assisted Synthesis of Composite Nanoparticles of Perovskite BaTiO 3 in Aqueous Solutions and Their Optical Properties. Materials (Basel) 2020; 13:ma13184086. [PMID: 32937999 PMCID: PMC7560434 DOI: 10.3390/ma13184086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/27/2020] [Accepted: 09/10/2020] [Indexed: 11/16/2022]
Abstract
Experimental results are presented on laser-assisted synthesis of composite nanoparticles of perovskite BaTiO3 with gold nanoparticles using the technique of laser ablation in water and aqueous solution of hydrogen peroxide. Nanoparticles of BaTiO3 are generated by near IR laser radiation with pulse durations of 170 fs, 1 ps, and 200 ns. Nanoparticles of barium titanate BaTiO3 (BTO) have tetragonal structure for all used pulse durations. Two ways of synthesis are tested. In the first one a gold target is ablated in the colloidal solution of BaTiO3 nanoparticles. The second way consists of laser exposure of the mixture of colloidal solutions of nanoparticles of BaTiO3 and Au. Synthesized composite nanoparticles are characterized by optical spectroscopy, Raman spectroscopy, X-Ray diffractometry, and Transmission Electron Microscopy. Composite BaTiO3‑Au nanoparticles have the absorption band in the visible range of spectrum and demonstrate plasmonic luminescence.
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Affiliation(s)
- Ekaterina V Barmina
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Bulat A Mukhametyanov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Oleg V Uvarov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Igor I Vlasov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Oleg S Kudryavtsev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Yurii L Kalachev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Evangelos Skoulas
- Ιnstitute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, 71110 Crete, Greece, (E.S.)
- Department of Materials Science and Technology, University of Crete, Heraklion, 70013 Crete, Greece
| | - George Kourmoulakis
- Ιnstitute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, 71110 Crete, Greece, (E.S.)
- Department of Materials Science and Technology, University of Crete, Heraklion, 70013 Crete, Greece
| | - Valeriy V Voronov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
| | - Emmanuel Stratakis
- Ιnstitute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, 71110 Crete, Greece, (E.S.)
- Department of Physics, University of Crete, Heraklion, 70013 Crete, Greece
| | - Georgy A Shafeev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russia, (E.V.B.)
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31, Kashira Hwy, 115409 Moscow, Russia
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30
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Konidakis I, Brintakis K, Kostopoulou A, Demeridou I, Kavatzikidou P, Stratakis E. Highly luminescent and ultrastable cesium lead bromide perovskite patterns generated in phosphate glass matrices. Nanoscale 2020; 12:13697-13707. [PMID: 32573581 DOI: 10.1039/d0nr03254a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Owing to their exceptional optoelectronic properties, all-inorganic lead halide perovskites offer enormous potential for next generation photonic, light-emitting, and optoelectronic devices. However, their usage is significantly limited by their poor stability upon moisture exposure and lead toxicity issues. Moreover, many of the aforementioned applications rely on the development of confined perovskite patterns of various shapes and periodicities. Here we report a simple and low-temperature method enabling the controlled incorporation of photoluminescent all-inorganic metal halide PNCs into a silver phosphate glass (AgPO3) matrix which is transparent in most of the visible range. The developed fabrication protocol is based on a simple melting encapsulation process in which pre-synthesized perovskite crystals are inserted in the glass matrix, following the initial glass quenching. Using this novel approach, two types of composite perovskite glasses are prepared, one that hosts perovskite isles and the second in which a thin perovskite layer is embedded beneath the glass surface. Both types of composite glasses exhibit remarkable photoluminescence stability when compared to the ambient air-exposed perovskite crystals. More importantly, by means of a simple and fast cw-laser processing technique, we demonstrate the development of encapsulated dotted perovskite micropatterns within the composite perovskite glass. The ability of the proposed system to resolve stability and lead toxicity issues, coupled with the facile formation of highly luminescent perovskite patterns pave the way towards the broad exploitation of perovskite crystals in photonic applications.
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Affiliation(s)
- Ioannis Konidakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 71110 Heraklion, Crete, Greece.
| | - Konstantinos Brintakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 71110 Heraklion, Crete, Greece.
| | - Athanasia Kostopoulou
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 71110 Heraklion, Crete, Greece.
| | - Ioanna Demeridou
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 71110 Heraklion, Crete, Greece. and Physics Department, University of Crete, 71003 Heraklion, Crete, Greece
| | - Paraskevi Kavatzikidou
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 71110 Heraklion, Crete, Greece.
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), 71110 Heraklion, Crete, Greece. and Physics Department, University of Crete, 71003 Heraklion, Crete, Greece
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Angelaki D, Kavatzikidou P, Fotakis C, Stratakis E, Ranella A. Laser-induced topographies enable the spatial patterning of co-cultured peripheral nervous system cells. Mater Sci Eng C Mater Biol Appl 2020; 115:111144. [PMID: 32600731 DOI: 10.1016/j.msec.2020.111144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/20/2020] [Accepted: 05/29/2020] [Indexed: 12/15/2022]
Abstract
The peripheral nervous system comprises glia and neurons that receive the necessary cues for their adhesion and proliferation from their extracellular milieu. In this study, a spatial platform of pseudoperiodic morphologies including patterns of nano- and micro- structures on Si were developed via direct ultrafast-laser structuring and were used as substrates for the patterning of co-cultured neuronal cells. The response of murine Schwann (SW10) and Neuro2a (N2a) cells were investigated both in monocultures and in a glia and neuronal co-culture system. Our results denoted that different types of neural tissue cells respond differently to the underlying topography, but furthermore, the presence of the glial cells alters the adhesion behavior of the neuronal cells in their co-culture. Therefore, we envisage that direct laser structuring that enables spatial patterning of the cells of the nervous system in a controllable manner according to the research needs, could in the future be a useful tool for understanding neural network interfaces and their electrical activity, synaptic processes and myelin formation.
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Affiliation(s)
- D Angelaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion 711 10, Greece; Department of Physics, University of Crete, Heraklion 710 03, Greece.
| | - P Kavatzikidou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion 711 10, Greece.
| | - C Fotakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion 711 10, Greece; Department of Physics, University of Crete, Heraklion 710 03, Greece.
| | - E Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion 711 10, Greece; Department of Physics, University of Crete, Heraklion 710 03, Greece.
| | - A Ranella
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (IESL-FORTH), Heraklion 711 10, Greece.
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Tsibidis GD, Stratakis E. Ionisation processes and laser induced periodic surface structures in dielectrics with mid-infrared femtosecond laser pulses. Sci Rep 2020; 10:8675. [PMID: 32457397 PMCID: PMC7250856 DOI: 10.1038/s41598-020-65613-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 05/06/2020] [Indexed: 12/02/2022] Open
Abstract
Irradiation of solids with ultrashort pulses and laser processing in the mid-Infrared (mid-IR) spectral region is a yet predominantly unexplored field with a large potential for a wide range of applications. In this work, laser driven physical phenomena associated with processes following irradiation of fused silica (SiO2) with ultrashort laser pulses in the mid-IR region are investigated in detail. A multiscale modelling approach is performed that correlates conditions for formation of perpendicular or parallel to the laser polarisation low spatial frequency periodic surface structures for low and high intensity mid-IR pulses (not previously explored in dielectrics at those wavelengths), respectively. Results demonstrate a remarkable domination of tunneling effects in the photoionisation rate and a strong influence of impact ionisation for long laser wavelengths. The methodology presented in this work is aimed to shed light on the fundamental mechanisms in a previously unexplored spectral area and allow a systematic novel surface engineering with strong mid-IR fields for advanced industrial laser applications.
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Affiliation(s)
- George D Tsibidis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece.
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
- Department of Physics, University of Crete, 71003, Heraklion, Greece
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33
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Seo J, Youn W, Choi JY, Cho H, Choi H, Lanara C, Stratakis E, Choi IS. Neuro-taxis: Neuronal movement in gradients of chemical and physical environments. Dev Neurobiol 2020; 80:361-377. [PMID: 32304173 DOI: 10.1002/dneu.22749] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 04/13/2020] [Indexed: 12/15/2022]
Abstract
Environmental chemical and physical cues dynamically interact with migrating neurons and sprouting axons, and in particular, the gradients of environmental cues are regarded as one of the factors intimately involved in the neuronal movement. Since a growth cone was first described by Cajal, more than one century ago, chemical gradients have been suggested as one of the mechanisms by which the neurons determine proper paths and destinations. However, the gradients of physical cues, such as stiffness and topography, which also interact constantly with the neurons and their axons as a component of the extracellular environments, have rarely been noted regarding the guidance of neurons, despite their gradually increasingly reported influences in the case of nonneuronal-cell migration. In this review, we discuss chemical (i.e., chemo- and hapto-) and physical (i.e., duro-) taxis phenomena on the movement of neurons including axonal elongation. In addition, we suggest topotaxis, the most recently proposed physical-taxis phenomenon, as another potential mechanism in the neuronal movement, based on the reports of neuronal recognition of and responses to nanotopography.
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Affiliation(s)
| | - Wongu Youn
- Department of Chemistry, KAIST, Daejeon, Korea
| | - Ji Yu Choi
- Department of Chemistry, KAIST, Daejeon, Korea
| | | | | | - Christina Lanara
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, Crete, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, Crete, Greece.,Physics Department, University of Crete, Heraklion, Crete, Greece
| | - Insung S Choi
- Department of Chemistry, KAIST, Daejeon, Korea.,Department of Bio and Brain Engineering, KAIST, Daejeon, Korea
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Shih CY, Gnilitskyi I, Shugaev MV, Skoulas E, Stratakis E, Zhigilei LV. Effect of a liquid environment on single-pulse generation of laser induced periodic surface structures and nanoparticles. Nanoscale 2020; 12:7674-7687. [PMID: 32207758 DOI: 10.1039/d0nr00269k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The effect of a liquid environment on the fundamental mechanisms of surface nanostructuring and generation of nanoparticles by single pulse laser ablation is investigated in a closely integrated computational and experimental study. A large-scale molecular dynamics simulation of spatially modulated ablation of Cr in water reveals a complex picture of the dynamic interaction between the ablation plume and water. Ablation plume is found to be rapidly decelerated by the water environment, resulting the formation and prompt disintegration of a hot metal layer at the interface between the ablation and water. A major fraction of the ablation plume is laterally redistributed and redeposited back to the target, forming smooth frozen surface features. Good agreement between the shapes of the surface features predicted in the simulation and the ones generated in single pulse laser ablation experiments performed for Cr in water supports the mechanistic insights revealed in the simulation. The results of this study suggest that the presence of a liquid environment can eliminate the sharp features of the surface morphology, reduce the amount of the material removed from the target by more than an order of magnitude, and narrow down the nanoparticle size distribution as compared to laser ablation under vacuum. Moreover, the computational predictions of the effective incorporation of molecules constituting the liquid environment into the surface region of the irradiated target and the generation of high vacancy concentrations, exceeding the equilibrium levels by more than an order of magnitude, suggest a potential for hyperdoping of laser-generated surfaces by solutes present in the liquid environment.
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Affiliation(s)
- Cheng-Yu Shih
- Department of Materials Science and Engineering, University of Virginia, 395 McCormick Road, Charlottesville, Virginia 22904-4745, USA.
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Kostopoulou A, Brintakis K, Serpetzoglou E, Stratakis E. Laser-Assisted Fabrication for Metal Halide Perovskite-2D Nanoconjugates: Control on the Nanocrystal Density and Morphology. Nanomaterials (Basel) 2020; 10:E747. [PMID: 32295209 PMCID: PMC7221537 DOI: 10.3390/nano10040747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/02/2020] [Accepted: 04/09/2020] [Indexed: 12/24/2022]
Abstract
We report on a facile and rapid photo-induced process to conjugate graphene-based materials with metal-halide perovskite nanocrystals. We show that a small number of laser pulses is sufficient to decorate the 2-dimensional (2D) flakes with metal-halide nanocrystals without affecting their primary morphology. At the same time, the density of anchored nanocrystals could be finely tuned by the number of irradiation pulses. This facile and rapid room temperature method provides unique opportunities for the design and development of perovskite-2D nanoconjugates, exhibiting synergetic functionality by combining nanocrystals of different morphologies and chemical phases with various 2D materials.
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Affiliation(s)
- Athanasia Kostopoulou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
| | - Konstantinos Brintakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
| | - Efthymis Serpetzoglou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, 71110 Heraklion, Crete, Greece; (K.B.); (E.S.)
- Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
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36
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Pisani S, Genta I, Dorati R, Kavatzikidou P, Angelaki D, Manousaki A, Karali K, Ranella A, Stratakis E, Conti B. Biocompatible polymeric electrospun matrices: Micro–nanotopography effect on cell behavior. J Appl Polym Sci 2020. [DOI: 10.1002/app.49223] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Silvia Pisani
- Department of Drug SciencesUniversity of Pavia Pavia Italy
| | - Ida Genta
- Department of Drug SciencesUniversity of Pavia Pavia Italy
| | - Rossella Dorati
- Department of Drug SciencesUniversity of Pavia Pavia Italy
- Polymerix s.r.l., Parco Tecnico Scientifico, Via Taramelli 20 Pavia Italy
| | - Paraskevi Kavatzikidou
- Institute of Electronic Structure and LaserFoundation for Research and Technology ‐ Hellas Heraklion, Crete Greece
| | - Despoina Angelaki
- Institute of Electronic Structure and LaserFoundation for Research and Technology ‐ Hellas Heraklion, Crete Greece
| | - Aleka Manousaki
- Institute of Electronic Structure and LaserFoundation for Research and Technology ‐ Hellas Heraklion, Crete Greece
| | - Kanelina Karali
- Institute of Electronic Structure and LaserFoundation for Research and Technology ‐ Hellas Heraklion, Crete Greece
- Department of PhysicsUniversity of Crete Heraklion, Crete Greece
| | - Anthi Ranella
- Institute of Electronic Structure and LaserFoundation for Research and Technology ‐ Hellas Heraklion, Crete Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and LaserFoundation for Research and Technology ‐ Hellas Heraklion, Crete Greece
- Department of PhysicsUniversity of Crete Heraklion, Crete Greece
| | - Bice Conti
- Department of Drug SciencesUniversity of Pavia Pavia Italy
- Polymerix s.r.l., Parco Tecnico Scientifico, Via Taramelli 20 Pavia Italy
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37
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Papadimitriou L, Manganas P, Ranella A, Stratakis E. Biofabrication for neural tissue engineering applications. Mater Today Bio 2020; 6:100043. [PMID: 32190832 PMCID: PMC7068131 DOI: 10.1016/j.mtbio.2020.100043] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 12/28/2022] Open
Abstract
Unlike other tissue types, the nervous tissue extends to a wide and complex environment that provides a plurality of different biochemical and topological stimuli, which in turn defines the advanced functions of that tissue. As a consequence of such complexity, the traditional transplantation therapeutic methods are quite ineffective; therefore, the restoration of peripheral and central nervous system injuries has been a continuous scientific challenge. Tissue engineering and regenerative medicine in the nervous system have provided new alternative medical approaches. These methods use external biomaterial supports, known as scaffolds, to create platforms for the cells to migrate to the injury site and repair the tissue. The challenge in neural tissue engineering (NTE) remains the fabrication of scaffolds with precisely controlled, tunable topography, biochemical cues, and surface energy, capable of directing and controlling the function of neuronal cells toward the recovery from neurological disorders and injuries. At the same time, it has been shown that NTE provides the potential to model neurological diseases in vitro, mainly via lab-on-a-chip systems, especially in cases for which it is difficult to obtain suitable animal models. As a consequence of the intense research activity in the field, a variety of synthetic approaches and 3D fabrication methods have been developed for the fabrication of NTE scaffolds, including soft lithography and self-assembly, as well as subtractive (top-down) and additive (bottom-up) manufacturing. This article aims at reviewing the existing research effort in the rapidly growing field related to the development of biomaterial scaffolds and lab-on-a-chip systems for NTE applications. Besides presenting recent advances achieved by NTE strategies, this work also delineates existing limitations and highlights emerging possibilities and future prospects in this field.
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Affiliation(s)
- L. Papadimitriou
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - P. Manganas
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - A. Ranella
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - E. Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
- Physics Department, University of Crete, Heraklion, 71003, Crete, Greece
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38
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Demetzos C, Kavatzikidou P, Pippa N, Stratakis E. Nanomedicines and Nanosimilars: Looking for a New and Dynamic Regulatory "Astrolabe" Inspired System. AAPS PharmSciTech 2020; 21:65. [PMID: 31933006 DOI: 10.1208/s12249-019-1573-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/07/2019] [Indexed: 12/19/2022] Open
Abstract
The application of the nanotechnology in medicine and pharmaceutics opens new horizons in therapeutics. Several nanomedicines are in the market and an increasing number is in clinical trials. But which is the advantage of the medicines in nanoscale? The scientists and the regulatory authorities agree that the size and consequently the physiochemical/biological properties of nanomaterials play a key role in their safety and effectiveness. Additionally, all of them agree that a new scientific-based regulatory landscape is required for the establishment of nanomedicines in the market. The aim of this review is to investigate the parameters that the scientists and the regulatory authorities should take into account in order to build up a dynamic regulatory landscape for nanomedicines. For this reason, we propose an "astrolabe-like system" as the guide for establishing the regulatory approval process. Its function is based on the different physicochemical/biological properties in comparison to low molecular weight drugs.
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Perrakis G, Kakavelakis G, Kenanakis G, Petridis C, Stratakis E, Kafesaki M, Kymakis E. Efficient and environmental-friendly perovskite solar cells via embedding plasmonic nanoparticles: an optical simulation study on realistic device architectures. Opt Express 2019; 27:31144-31163. [PMID: 31684352 DOI: 10.1364/oe.27.031144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Solution-processed, lead halide-based perovskite solar cells have recently overcome important challenges, offering low-cost and high solar power conversion efficiencies. However, they still undergo unoptimized light collection due mainly to the thin (∼350 nm) polycrystalline absorber layers. Moreover, their high toxicity (due to the presence of lead in perovskite crystalline structures) makes it necessary that the thickness of the absorber layers to be further reduced. Here we address these issues via embedding spherical plasmonic nanoparticles of various sizes, composition, concentrations, and vertical positions, in realistic halide-based perovskite solar cells. We theoretically show that plasmon-enhanced near-field effects and scattering leads to a device photocurrent enhancement up to ∼7.3% when silver spheres are embedded inside the perovskite layer. An even further enhancement, up to ∼12%, is achieved with the combination of silver spheres in perovskite and aluminum spheres inside the hole transporting layer (PEDOT:PSS). The proper involvement of nanoparticles allows the employment of much thinner perovskite layers (up to 150 nm), reducing thus significantly the toxicity. Providing the requirements related to the design parameters of nanoparticles, our study establishes guidelines for a future development of highly-efficient, environmentally friendly and low-cost plasmonic perovskite solar cells.
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40
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Psilodimitrakopoulos S, Mouchliadis L, Paradisanos I, Kourmoulakis G, Lemonis A, Kioseoglou G, Stratakis E. Twist Angle mapping in layered WS 2 by Polarization-Resolved Second Harmonic Generation. Sci Rep 2019; 9:14285. [PMID: 31582759 PMCID: PMC6776617 DOI: 10.1038/s41598-019-50534-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/09/2019] [Indexed: 11/18/2022] Open
Abstract
Stacked atomically thin transition metal dichalcogenides (TMDs) exhibit fundamentally new physical properties compared to those of the individual layers. The twist angle between the layers plays a crucial role in tuning these properties. Having a tool that provides high-resolution, large area mapping of the twist angle, would be of great importance in the characterization of such 2D structures. Here we use polarization-resolved second harmonic generation (P-SHG) imaging microscopy to rapidly map the twist angle in large areas of overlapping WS2 stacked layers. The robustness of our methodology lies in the combination of both intensity and polarization measurements of SHG in the overlapping region. This allows the accurate measurement and consequent pixel-by-pixel mapping of the twist angle in this area. For the specific case of 30° twist angle, P-SHG enables imaging of individual layers.
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Affiliation(s)
- Sotiris Psilodimitrakopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece
| | - Leonidas Mouchliadis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece
| | - Ioannis Paradisanos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece.,Department of Physics, University of Crete, Heraklion, Crete, 71003, Greece
| | - George Kourmoulakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece.,Department of Materials Science and Technology, University of Crete, Heraklion, Crete, 71003, Greece
| | - Andreas Lemonis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece
| | - George Kioseoglou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece.,Department of Materials Science and Technology, University of Crete, Heraklion, Crete, 71003, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion, Crete, 71110, Greece. .,Department of Materials Science and Technology, University of Crete, Heraklion, Crete, 71003, Greece.
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41
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Petrović M, Maksudov T, Panagiotopoulos A, Serpetzoglou E, Konidakis I, Stylianakis MM, Stratakis E, Kymakis E. Limitations of a polymer-based hole transporting layer for application in planar inverted perovskite solar cells. Nanoscale Adv 2019; 1:3107-3118. [PMID: 36133594 PMCID: PMC9417823 DOI: 10.1039/c9na00246d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 06/21/2019] [Indexed: 05/31/2023]
Abstract
Planar inverted lead halide photovoltaics demonstrate remarkable photoconversion properties when employing poly(triarylamine) (PTAA) as a hole transporting layer. Herein, we elucidate the effect of ambient ultraviolet (UV) degradation on the structural and operational stability of the PTAA hole transporter through a series of rigorous optoelectrical characterization protocols. Due attention was given to the interplay between the polymer and perovskite absorber, both within the framework of a bilayer structure and fully assembled solar cells. The obtained results imply that UV degradation exerts a major influence on the structural integrity of PTAA, rather than on the interface with the perovskite light harvester. Moreover, UV exposure induced more adverse effects on tested samples than environmental humidity and oxygen, contributing more to the overall reduction of charge extraction properties of PTAA, as well as increased defect population upon prolonged UV exposure.
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Affiliation(s)
- Miloš Petrović
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University Heraklion 71410 Crete Greece
| | - Temur Maksudov
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University Heraklion 71410 Crete Greece
| | - Apostolos Panagiotopoulos
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University Heraklion 71410 Crete Greece
- Department of Materials Science and Technology, University of Crete Heraklion 71003 Crete Greece
| | - Efthymis Serpetzoglou
- Physics Department, University of Crete 71003 Heraklion Crete Greece
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH) 71110 Heraklion Crete Greece
| | - Ioannis Konidakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH) 71110 Heraklion Crete Greece
| | - Minas M Stylianakis
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University Heraklion 71410 Crete Greece
| | - Emmanuel Stratakis
- Department of Materials Science and Technology, University of Crete Heraklion 71003 Crete Greece
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH) 71110 Heraklion Crete Greece
| | - Emmanuel Kymakis
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University Heraklion 71410 Crete Greece
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Papadopoulos A, Skoulas E, Mimidis A, Perrakis G, Kenanakis G, Tsibidis GD, Stratakis E. Biomimetic Omnidirectional Antireflective Glass via Direct Ultrafast Laser Nanostructuring. Adv Mater 2019; 31:e1901123. [PMID: 31231905 DOI: 10.1002/adma.201901123] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 04/29/2019] [Indexed: 06/09/2023]
Abstract
Here, a single-step, biomimetic approach for the realization of omnidirectional transparent antireflective glass is reported. In particular, it is shown that circularly polarized ultrashort laser pulses produce self-organized nanopillar structures on fused silica (SiO2 ). The laser-induced nanostructures are selectively textured on the glass surface in order to mimic the spatial randomness, pillar-like morphology, as well as the remarkable antireflection properties found on the wings of the glasswing butterfly, Greta oto, and various Cicada species. The artificial structures exhibit impressive antireflective properties, both in the visible and infrared frequency ranges, which are remarkably stable over time. Accordingly, the laser-processed glass surfaces show reflectivity smaller than 1% for various angles of incidence in the visible spectrum for s-p linearly polarized configurations. However, in the near-infrared spectrum, the laser-textured glass shows higher transmittance compared to the pristine. It is envisaged that the current results will revolutionize the technology of antireflective transparent surfaces and impact numerous applications from glass displays to optoelectronic devices.
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Affiliation(s)
- Antonis Papadopoulos
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
- Materials Science and Technology Department, University of Crete, Vassilika Vouton, 71003, Heraklion, Crete, Greece
| | - Evangelos Skoulas
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
- Materials Science and Technology Department, University of Crete, Vassilika Vouton, 71003, Heraklion, Crete, Greece
| | - Alexandros Mimidis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
- Materials Science and Technology Department, University of Crete, Vassilika Vouton, 71003, Heraklion, Crete, Greece
| | - George Perrakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
- Materials Science and Technology Department, University of Crete, Vassilika Vouton, 71003, Heraklion, Crete, Greece
| | - George Kenanakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
| | - George D Tsibidis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology (FORTH), N. Plastira 100, Vassilika Vouton, 70013, Heraklion, Crete, Greece
- Materials Science and Technology Department, University of Crete, Vassilika Vouton, 71003, Heraklion, Crete, Greece
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Brintakis K, Gagaoudakis E, Kostopoulou A, Faka V, Argyrou A, Binas V, Kiriakidis G, Stratakis E. Ligand-free all-inorganic metal halide nanocubes for fast, ultra-sensitive and self-powered ozone sensors. Nanoscale Adv 2019; 1:2699-2706. [PMID: 36132711 PMCID: PMC9419230 DOI: 10.1039/c9na00219g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 05/22/2019] [Indexed: 05/30/2023]
Abstract
Ligand-free all-inorganic lead halide nanocubes have been investigated as ozone sensing materials operating at room temperature. It is found that the nanocubes, crystallined in the orthorhombic CsPbBr3 structure, can operate at room temperature, be self-powered and exhibit high sensitivity and remarkable repeatability. More importantly, they demonstrate higher sensitivity (54% in 187 ppb) and faster response and recovery times compared to hybrid lead mixed halide perovskite (CH3NH3PbI3-x Cl x ) layers, which is the only lead halide perovskite material tested for ozone sensing, to date. Following the exposure to an ozone environment, the stoichiometry and the morphology of the nanocubes remain unaltered. The facile and easy fabrication process together with the high responsivity and stability to the ozone environment makes the bare CsPbBr3 nanocubes a promising material for sensing applications. The sensing properties of the nanoparticulate metal halides presented here provide new exciting opportunities towards engineering reliable and cheap sensing elements for room-temperature operated and self-powered sensors.
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Affiliation(s)
- K Brintakis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
| | - E Gagaoudakis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
| | - A Kostopoulou
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
| | - V Faka
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
- University of Crete, Department of Materials Science and Technology 710 03 Heraklion Crete Greece
| | - A Argyrou
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Materials Science and Technology 710 03 Heraklion Crete Greece
| | - V Binas
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
- Crete Center for Quantum Complexity and Nanotechnology, Department of Physics, University of Crete 71003 Heraklion Greece
| | - G Kiriakidis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
| | - E Stratakis
- Institute of Electronic Structure & Laser (IESL), Foundation for Research and Technology (FORTH) Hellas P.O. Box 1385 Heraklion 70013 Crete Greece
- University of Crete, Department of Physics 710 03 Heraklion Crete Greece
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Zerva I, Katsoni E, Simitzi C, Stratakis E, Athanassakis I. Laser micro-structured Si scaffold-implantable vaccines against Salmonella Typhimurium. Vaccine 2019; 37:2249-2257. [DOI: 10.1016/j.vaccine.2019.02.080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 02/11/2019] [Accepted: 02/26/2019] [Indexed: 11/26/2022]
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Heuer-Jungemann A, Feliu N, Bakaimi I, Hamaly M, Alkilany A, Chakraborty I, Masood A, Casula MF, Kostopoulou A, Oh E, Susumu K, Stewart MH, Medintz IL, Stratakis E, Parak WJ, Kanaras AG. The Role of Ligands in the Chemical Synthesis and Applications of Inorganic Nanoparticles. Chem Rev 2019; 119:4819-4880. [PMID: 30920815 DOI: 10.1021/acs.chemrev.8b00733] [Citation(s) in RCA: 434] [Impact Index Per Article: 86.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The design of nanoparticles is critical for their efficient use in many applications ranging from biomedicine to sensing and energy. While shape and size are responsible for the properties of the inorganic nanoparticle core, the choice of ligands is of utmost importance for the colloidal stability and function of the nanoparticles. Moreover, the selection of ligands employed in nanoparticle synthesis can determine their final size and shape. Ligands added after nanoparticle synthesis infer both new properties as well as provide enhanced colloidal stability. In this article, we provide a comprehensive review on the role of the ligands with respect to the nanoparticle morphology, stability, and function. We analyze the interaction of nanoparticle surface and ligands with different chemical groups, the types of bonding, the final dispersibility of ligand-coated nanoparticles in complex media, their reactivity, and their performance in biomedicine, photodetectors, photovoltaic devices, light-emitting devices, sensors, memory devices, thermoelectric applications, and catalysis.
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Affiliation(s)
- Amelie Heuer-Jungemann
- School of Physics and Astronomy, Faculty of Engineering and Physical Sciences , University of Southampton , Southampton SO17 1BJ , U.K
| | - Neus Feliu
- Department of Laboratory Medicine (LABMED) , Karolinska Institutet , Stockholm 171 77 , Sweden.,Fachbereich Physik, CHyN , Universität Hamburg , 22607 Hamburg , Germany
| | - Ioanna Bakaimi
- School of Chemistry, Faculty of Engineering and Physical Sciences , University of Southampton , Southampton SO171BJ , U.K
| | - Majd Hamaly
- King Hussein Cancer Center , P. O. Box 1269, Al-Jubeiha, Amman 11941 , Jordan
| | - Alaaldin Alkilany
- Department of Pharmaceutics & Pharmaceutical Technology, School of Pharmacy , The University of Jordan , Amman 11942 , Jordan.,Fachbereich Physik, CHyN , Universität Hamburg , 22607 Hamburg , Germany
| | | | - Atif Masood
- Fachbereich Physik , Philipps Universität Marburg , 30357 Marburg , Germany
| | - Maria F Casula
- INSTM and Department of Chemical and Geological Sciences , University of Cagliari , 09042 Monserrato , Cagliari , Italy.,Department of Mechanical, Chemical and Materials Engineering , University of Cagliari , Via Marengo 2 , 09123 Cagliari , Italy
| | - Athanasia Kostopoulou
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , Heraklion , 71110 Crete , Greece
| | - Eunkeu Oh
- KeyW Corporation , Hanover , Maryland 21076 , United States.,Optical Sciences Division, Code 5600 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Kimihiro Susumu
- KeyW Corporation , Hanover , Maryland 21076 , United States.,Optical Sciences Division, Code 5600 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Michael H Stewart
- Optical Sciences Division, Code 5600 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , Heraklion , 71110 Crete , Greece
| | - Wolfgang J Parak
- Fachbereich Physik, CHyN , Universität Hamburg , 22607 Hamburg , Germany
| | - Antonios G Kanaras
- School of Physics and Astronomy, Faculty of Engineering and Physical Sciences , University of Southampton , Southampton SO17 1BJ , U.K
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Ziv A, Tzaguy A, Sun Z, Yochelis S, Stratakis E, Kenanakis G, Schatz GC, Lauhon LJ, Seidman DN, Paltiel Y, Yerushalmi R. Broad-band high-gain room temperature photodetectors using semiconductor-metal nanofloret hybrids with wide plasmonic response. Nanoscale 2019; 11:6368-6376. [PMID: 30888369 DOI: 10.1039/c9nr00385a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Semiconducting nanowires are widely studied as building blocks for electro-optical devices; however, their limited cross-section and hence photo-response hinder the utilization of their full potential. Herein, we present an opto-electronic device for broad spectral detection ranging from the visible (VIS) to the short wavelength infra-red (SWIR) regime, using SiGe nanowires coupled to a broadband plasmonic antenna. The plasmonic amplification is obtained by deposition of a metallic nanotip at the edge of a nanowire utilizing a bottom-up synthesis technique. The metallic nanotip is positioned such that both optical plasmonic modes and electrical detection paths are coupled, resulting in a specific detectivity improvement of ∼1000 compared to conventional SiGe NWs. Detectivity and high gain are also measured in the SWIR regime owing to the special plasmonic response. Furthermore, the temporal response is improved by ∼1000. The fabrication process is simple and scalable, and it relies on low-resolution and facile fabrication steps with minimal requirements for top-down techniques.
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Affiliation(s)
- Amir Ziv
- Department of Applied Physics, the Hebrew University, Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem, 91904, Israel.
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Kostopoulou A, Vernardou D, Savva K, Stratakis E. All-inorganic lead halide perovskite nanohexagons for high performance air-stable lithium batteries. Nanoscale 2019; 11:882-889. [PMID: 30608506 DOI: 10.1039/c8nr10009h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
All-inorganic Cs4PbBr6 perovskite nanohexagons, pre-synthesized by a room temperature co-precipitation method, have been electrochemically investigated in a conventional aqueous electrolyte for potential application as an anode material in Li-ion batteries. The nanohexagons were uniformly deposited on ITO precoated glass substrate and subsequently annealed at ambient air to form a mechanically stable perovskite layer. These perovskite layers showed excellent performance during continuous Li-ion intercalation/deintercalation scans in an aqueous electrolyte, exhibiting a diffusion coefficient of 7.34 × 10-8 cm2 s-1, a specific discharge capacity of 377 mA h g-1, a capacity retention of 75% and coulombic efficiency that deteriorated to 98% after 100 scans. A water-triggered transformation of the Cs4PbBr6 to the CsPb2Br5 was initially observed followed by a reversible Li intercalation/deintercalation in the CsPb2Br5 structure for 40 consecutive scans. Following this period, an irreversible conversion reaction of CsPb2Br5 to CsBr and PbBr2 took place. The excellent electrochemical performance observed is promising towards the potential application of all-inorganic perovskite nanocrystals for air-stable, lithium storage applications.
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Affiliation(s)
- A Kostopoulou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology - Hellas, Heraklion, 71110 Crete, Greece.
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Alexaki K, Kostopoulou A, Sygletou M, Kenanakis G, Stratakis E. Unveiling the Structure of MoS x Nanocrystals Produced upon Laser Fragmentation of MoS 2 Platelets. ACS Omega 2018; 3:16728-16734. [PMID: 31458302 PMCID: PMC6643385 DOI: 10.1021/acsomega.8b01390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 09/13/2018] [Indexed: 06/10/2023]
Abstract
Transition-metal dichalcogenide MoS2 nanostructures have attracted tremendous attention due to their unique properties, which render them efficient nanoscale functional components for multiple applications ranging from sensors and biomedical probes to energy conversion and storage devices. However, despite the wide application range, the possibility to tune their size, shape, and composition is still a challenge. At the same time, the correlation of the structure with the optoelectronic properties is still unresolved. Here, we propose a new method to synthesize various morphologies of molybdenum sulfide nanocrystals, on the basis of ultrashort-pulsed laser fragmentation of MoS2 platelets. Depending on the irradiation conditions, multiple MoS x morphologies in the form of nanoribbons, nanospheres, and photoluminescent quantum dots are obtained. Besides the detailed structural analysis of the various crystals formed, the structure-property relation is investigated and discussed.
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Affiliation(s)
- Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology Hellas, Nikolaou Plastira 100, Heraklion, Crete, GR-70013, Greece.
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Sygletou M, Kyriazi ME, Kanaras AG, Stratakis E. Anion exchange in inorganic perovskite nanocrystal polymer composites. Chem Sci 2018; 9:8121-8126. [PMID: 30542562 PMCID: PMC6238712 DOI: 10.1039/c8sc02830c] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 08/29/2018] [Indexed: 11/21/2022] Open
Abstract
We demonstrate a facile, low-cost and room-temperature method of anion exchange in cesium lead bromide nanocrystals (CsPbBr3 NCs), embedded into a polymer matrix. The anion exchange occurs upon exposure of the solid CsPbBr3 NCs/PDMS nanocomposite to a controlled anion precursor gas atmosphere. The rate and extent of the anion exchange reaction can be controlled via the variation of either the exposure time or the relative concentration of the anion precursor gas. Post-synthesis chemical transformation of perovskite nanocrystal-polymer composites is not readily achievable using conventional methods of anion exchange, which renders the gas-assisted strategy extremely useful. We envisage that this work will enable the development of solid-state perovskite NC optoelectronic devices.
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Affiliation(s)
- Maria Sygletou
- Institute of Electronic Structure and Laser , Foundation for Research and Technology - Hellas , Heraklion , 71110 , Crete , Greece . ;
| | - Maria-Eleni Kyriazi
- Physics and Astronomy , Faculty of Physical Sciences and Engineering , University of Southampton , Southampton , SO171BJ , UK
| | - Antonios G Kanaras
- Physics and Astronomy , Faculty of Physical Sciences and Engineering , University of Southampton , Southampton , SO171BJ , UK
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser , Foundation for Research and Technology - Hellas , Heraklion , 71110 , Crete , Greece . ;
- Department of Materials Science and Technology , University of Crete , Heraklion 71003 , Crete , Greece
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