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Scherer F, Wille S, Saure L, Schütt F, Wellhäußer B, Adelung R, Kern M. Investigation of Mechanical Properties of Polymer-Infiltrated Tetrapodal Zinc Oxide in Different Variants. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2112. [PMID: 38730918 PMCID: PMC11084298 DOI: 10.3390/ma17092112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 04/28/2024] [Accepted: 04/28/2024] [Indexed: 05/13/2024]
Abstract
The aim of this study was to evaluate the influence of weight ratio, the shape of the precursor particles, and the application of a phosphate-monomer-containing primer on the mechanical properties of polymer infiltrated ceramic networks (PICNs) using zinc oxide. Two different types of zinc oxide particles were used as precursors to produce zinc oxide networks by sintering, each with two different densities resulting in two different weight ratios of the PICNs. For each of these different networks, two subgroups were built: one involving the application of a phosphate-monomer-containing primer prior to the infiltration of Bis-GMA/TEGDMA and one without. Elastic modulus and flexural strength were determined by using the three-point bending test. Vertical substance loss determined by the chewing simulation was evaluated with a laser scanning microscope. There was a statistically significant influence of the type of precursor particles on the flexural strength and in some cases on the elastic modulus. The application of a primer lead to a significant increase in the flexural strength and in most cases also in the elastic modulus. A higher weight ratio of zinc oxide led to a significantly higher elastic modulus. Few statistically significant differences were found for the vertical substance loss. By varying the shape of the particles and the weight fraction of zinc oxide, the mechanical properties of the investigated PICN can be controlled. The use of a phosphate-monomer-containing primer strengthens the bond between the infiltrated polymer and the zinc oxide, thus increasing the strength of the composite.
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Affiliation(s)
- Franziska Scherer
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105 Kiel, Germany; (S.W.); (M.K.)
| | - Sebastian Wille
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105 Kiel, Germany; (S.W.); (M.K.)
| | - Lena Saure
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany; (L.S.); (F.S.); (R.A.)
| | - Fabian Schütt
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany; (L.S.); (F.S.); (R.A.)
| | - Benjamin Wellhäußer
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105 Kiel, Germany; (S.W.); (M.K.)
| | - Rainer Adelung
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany; (L.S.); (F.S.); (R.A.)
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Arnold-Heller-Straße 16, 24105 Kiel, Germany; (S.W.); (M.K.)
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2
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Saure LM, Kohlmann N, Qiu H, Shetty S, Shaygan Nia A, Ravishankar N, Feng X, Szameit A, Kienle L, Adelung R, Schütt F. Hybrid Aeromaterials for Enhanced and Rapid Volumetric Photothermal Response. ACS NANO 2023; 17:22444-22455. [PMID: 37963588 PMCID: PMC10690840 DOI: 10.1021/acsnano.3c05329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 10/05/2023] [Indexed: 11/16/2023]
Abstract
Conversion of light into heat is essential for a broad range of technologies such as solar thermal heating, catalysis and desalination. Three-dimensional (3D) carbon nanomaterial-based aerogels have been shown to hold great promise as photothermal transducer materials. However, until now, their light-to-heat conversion is limited by near-surface absorption, resulting in a strong heat localization only at the illuminated surface region, while most of the aerogel volume remains unused. We present a fabrication concept for highly porous (>99.9%) photothermal hybrid aeromaterials, which enable an ultrarapid and volumetric photothermal response with an enhancement by a factor of around 2.5 compared to the pristine variant. The hybrid aeromaterial is based on strongly light-scattering framework structures composed of interconnected hollow silicon dioxide (SiO2) microtubes, which are functionalized with extremely low amounts (in order of a few μg cm-3) of reduced graphene oxide (rGO) nanosheets, acting as photothermal agents. Tailoring the density of rGO within the framework structure enables us to control both light scattering and light absorption and thus the volumetric photothermal response. We further show that by rapid and repeatable gas activation, these transducer materials expand the field of photothermal applications, like untethered light-powered and light-controlled microfluidic pumps and soft pneumatic actuators.
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Affiliation(s)
- Lena M. Saure
- Functional Nanomaterials and Synthesis and Real Structure, Department
for
Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Niklas Kohlmann
- Functional Nanomaterials and Synthesis and Real Structure, Department
for
Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Haoyi Qiu
- Functional Nanomaterials and Synthesis and Real Structure, Department
for
Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Shwetha Shetty
- Materials
Research Centre, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Ali Shaygan Nia
- Department
of Chemistry and Food Chemistry, Center for Advancing Electronics
Dresden (cfaed), Dresden University of Technology, 01062 Dresden, Germany
| | - Narayanan Ravishankar
- Materials
Research Centre, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Xinliang Feng
- Department
of Chemistry and Food Chemistry, Center for Advancing Electronics
Dresden (cfaed), Dresden University of Technology, 01062 Dresden, Germany
| | - Alexander Szameit
- Department for Physics and Department of Life,
Light & Matter, University of Rostock, 18059 Rostock, Germany
| | - Lorenz Kienle
- Functional Nanomaterials and Synthesis and Real Structure, Department
for
Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
- Kiel
Nano, Surface and Interface Science KiNSIS, Kiel University, Christian-Albrechts-Platz
4, 24118 Kiel, Germany
| | - Rainer Adelung
- Functional Nanomaterials and Synthesis and Real Structure, Department
for
Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
- Kiel
Nano, Surface and Interface Science KiNSIS, Kiel University, Christian-Albrechts-Platz
4, 24118 Kiel, Germany
| | - Fabian Schütt
- Functional Nanomaterials and Synthesis and Real Structure, Department
for
Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
- Kiel
Nano, Surface and Interface Science KiNSIS, Kiel University, Christian-Albrechts-Platz
4, 24118 Kiel, Germany
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3
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Sanders SL, Douglas LD, Sill TE, Stewart K, Pieniazek N, Li C, Walters E, Al-Hashimi M, Fang L, Davidson RD, Banerjee S. Tetrapodal textured Janus textiles for accessible menstrual health. iScience 2023; 26:108224. [PMID: 38107878 PMCID: PMC10725076 DOI: 10.1016/j.isci.2023.108224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/15/2023] [Accepted: 10/12/2023] [Indexed: 12/19/2023] Open
Abstract
Menstruating individuals without access to adequate hygiene products often improvise with alternatives that pose health risks and limit their participation in society. We describe here a menstrual hygiene product based on low-cost materials, which are integrated onto fabrics to imbue unidirectional permeability. A body-facing "Janus" fabric top layer comprising ZnO tetrapods spray-coated onto polyester mosquito netting imparts hierarchical texturation, augmenting the micron-scale texturation derived from the weave of the underlying fabric. The asymmetric coating establishes a gradient in wettability, which underpins flash spreading and unidirectional permeability. The hygiene product accommodates a variety of absorptive media, which are sandwiched between the Janus layer and a second outward-facing coated densely woven fabric. An assembled prototype demonstrates outstanding ability to wick saline solutions and a menstrual fluid simulant while outperforming a variety of commercially alternatives. The results demonstrate a versatile menstrual health product that provides a combination of dryness, discretion, washability, and safety.
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Affiliation(s)
- Sarah L. Sanders
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Lacey D. Douglas
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Tiffany E. Sill
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Kaylyn Stewart
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Noah Pieniazek
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Chenxuan Li
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
| | - Eve Walters
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | | | - Lei Fang
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
| | - Rachel D. Davidson
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Sarbajit Banerjee
- Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
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Schadte P, Rademacher F, Andresen G, Hellfritzsch M, Qiu H, Maschkowitz G, Gläser R, Heinemann N, Drücke D, Fickenscher H, Scherließ R, Harder J, Adelung R, Siebert L. 3D-printed wound dressing platform for protein administration based on alginate and zinc oxide tetrapods. NANO CONVERGENCE 2023; 10:53. [PMID: 37971675 PMCID: PMC10654273 DOI: 10.1186/s40580-023-00401-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 10/24/2023] [Indexed: 11/19/2023]
Abstract
Wound treatment requires a plethora of independent properties. Hydration, anti-bacterial properties, oxygenation and patient-specific drug delivery all contribute to the best possible wound healing. Three-dimensional (3D) printing has emerged as a set of techniques to realize individually adapted wound dressings with open porous structure from biomedically optimized materials. To include all the desired properties into the so-called bioinks is still challenging. In this work, a bioink system based on anti-bacterial zinc oxide tetrapods (t-ZnO) and biocompatible sodium alginate is presented. Additive manufacturing of these hydrogels with high t-ZnO content (up to 15 wt.%) could be realized. Additionally, protein adsorption on the t-ZnO particles was evaluated to test their suitability as carriers for active pharmaceutical ingredients (APIs). Open porous and closed cell printed wound dressings were tested for their cell and skin compatibility and anti-bacterial properties. In these categories, the open porous constructs exhibited protruding t-ZnO arms and proved to be anti-bacterial. Dermatological tests on ex vivo skin showed no negative influence of the alginate wound dressing on the skin, making this bioink an ideal carrier and evaluation platform for APIs in wound treatment and healing.
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Affiliation(s)
- Philipp Schadte
- Functional Nanomaterials, Department for Material Science, Kiel University, Kiel, Germany
| | - Franziska Rademacher
- Department of Dermatology, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Gerrit Andresen
- Institute for Infection Medicine, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Marie Hellfritzsch
- Department of Pharmaceutics and Biopharmaceutics, Kiel University, Kiel, Germany
| | - Haoyi Qiu
- Functional Nanomaterials, Department for Material Science, Kiel University, Kiel, Germany
| | - Gregor Maschkowitz
- Institute for Infection Medicine, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Regine Gläser
- Department of Dermatology, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Nina Heinemann
- Department of Dermatology, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Daniel Drücke
- Department of Reconstructive Surgery, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Helmut Fickenscher
- Institute for Infection Medicine, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Regina Scherließ
- Department of Pharmaceutics and Biopharmaceutics, Kiel University, Kiel, Germany
- Kiel Nano, Surface and Interface Science - KiNSIS, Kiel University, Kiel, Germany
| | - Jürgen Harder
- Department of Dermatology, Kiel University and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Rainer Adelung
- Functional Nanomaterials, Department for Material Science, Kiel University, Kiel, Germany.
- Kiel Nano, Surface and Interface Science - KiNSIS, Kiel University, Kiel, Germany.
| | - Leonard Siebert
- Functional Nanomaterials, Department for Material Science, Kiel University, Kiel, Germany.
- Kiel Nano, Surface and Interface Science - KiNSIS, Kiel University, Kiel, Germany.
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5
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Orudzhev F, Muslimov A, Selimov D, Gulakhmedov RR, Lavrikov A, Kanevsky V, Gasimov R, Krasnova V, Sobola D. Oxygen Vacancies and Surface Wettability: Key Factors in Activating and Enhancing the Solar Photocatalytic Activity of ZnO Tetrapods. Int J Mol Sci 2023; 24:16338. [PMID: 38003527 PMCID: PMC10671779 DOI: 10.3390/ijms242216338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/06/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023] Open
Abstract
This paper reports on the high photocatalytic activity of ZnO tetrapods (ZnO-Ts) using visible/solar light and hydrodynamic water flow. It was shown that surface oxygen defects are a key factor in the photocatalytic activity of the ZnO-Ts. The ability to control the surface wettability of the ZnO-Ts and the associated concentration of surface defects was demonstrated. It was demonstrated that the photocatalytic activity during the MB decomposition process under direct and simulated sunlight is essentially identical. This presents excellent prospects for utilizing the material in solar photocatalysis.
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Affiliation(s)
- Farid Orudzhev
- Smart Materials Laboratory, Dagestan State University, 367000 Makhachkala, Russia; (D.S.); (R.R.G.)
| | - Arsen Muslimov
- Federal Research Center “Crystallography and Photonics”, Russian Academy of Sciences, 119333 Moscow, Russia; (A.M.); (A.L.); (V.K.); (V.K.)
| | - Daud Selimov
- Smart Materials Laboratory, Dagestan State University, 367000 Makhachkala, Russia; (D.S.); (R.R.G.)
| | - Rashid R. Gulakhmedov
- Smart Materials Laboratory, Dagestan State University, 367000 Makhachkala, Russia; (D.S.); (R.R.G.)
| | - Alexander Lavrikov
- Federal Research Center “Crystallography and Photonics”, Russian Academy of Sciences, 119333 Moscow, Russia; (A.M.); (A.L.); (V.K.); (V.K.)
| | - Vladimir Kanevsky
- Federal Research Center “Crystallography and Photonics”, Russian Academy of Sciences, 119333 Moscow, Russia; (A.M.); (A.L.); (V.K.); (V.K.)
| | - Rashid Gasimov
- Institute of Radiation Problems of Azerbaijan National Academy of Sciences, AZ1143 Baku, Azerbaijan
| | - Valeriya Krasnova
- Federal Research Center “Crystallography and Photonics”, Russian Academy of Sciences, 119333 Moscow, Russia; (A.M.); (A.L.); (V.K.); (V.K.)
| | - Dinara Sobola
- Department of Physics, Faculty of Electrical Engineering and Communication, Brno University of Technology, 61600 Brno, Czech Republic
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6
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Ilickas M, Mardosaite R, Cesano F, Cravanzola S, Barolo C, Scarano D, Viscardi G, Rackauskas S. ZnO tetrapod morphology influence on UV sensing properties. NANOTECHNOLOGY 2023; 35:015502. [PMID: 37748455 DOI: 10.1088/1361-6528/acfcbf] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 09/24/2023] [Indexed: 09/27/2023]
Abstract
The aim of this work was to investigate how ZnO tetrapod (ZnO-T) morphology, structure, and surface charge properties (i.e. Debye length) influence their UV sensing properties, shedding light on the underlying photoresponse mechanisms. ZnO-Ts were synthesized and centrifuged to obtain three different fractions with tuned morphology, which were characterized by scanning electron microscopy, transmission electron microscopy, and high-resolution transmission electron microscopy microscopies, x-ray diffraction analysis, Brunauer-Emmett-Teller measurements, FTIR and UV-vis spectroscopies. ZnO-T UV sensors were fabricated and tested comparing among ZnO-T fractions and commercial ZnO nanoparticles. ZnO-T photoresponse was mostly influenced by ZnO-T leg diameter, with the optimal value close to the double Debye length. We also demonstrated how fractionating ZnO-Ts for morphology optimization can increased the responsivity by 2 orders of magnitude. Moreover, ZnO-T showed 3 orders of magnitude higher responsivity compared to commercial ZnO nanopowder. These results are beneficial for the engineering of efficient UV sensors and contribute to a deeper understanding the overall mechanism governing UV photoresponse.
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Affiliation(s)
- Mindaugas Ilickas
- Institute of Materials Science, Kaunas University of Technology, K. Barsausko St. 59, 51423 Kaunas, Lithuania
| | - Rasa Mardosaite
- Institute of Materials Science, Kaunas University of Technology, K. Barsausko St. 59, 51423 Kaunas, Lithuania
- Department of Physics, Kaunas University of Technology, Studentu St. 50, 51368 Kaunas, Lithuania
| | - Federico Cesano
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy
| | - Sara Cravanzola
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy
| | - Claudia Barolo
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy
| | - Domenica Scarano
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy
| | - Guido Viscardi
- Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Via Pietro Giuria 7, I-10125 Turin, Italy
| | - Simas Rackauskas
- Institute of Materials Science, Kaunas University of Technology, K. Barsausko St. 59, 51423 Kaunas, Lithuania
- Department of Physics, Kaunas University of Technology, Studentu St. 50, 51368 Kaunas, Lithuania
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7
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Sumaya MU, Maria KH, Toma F, Zubair M, Chowdhury M. Effect of stabilizer content in different solvents on the synthesis of ZnO nanoparticles using the chemical precipitation method. Heliyon 2023; 9:e20871. [PMID: 37867854 PMCID: PMC10585300 DOI: 10.1016/j.heliyon.2023.e20871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/05/2023] [Accepted: 10/09/2023] [Indexed: 10/24/2023] Open
Abstract
Zinc Oxide (ZnO) nanoparticles (NPs) have been synthesized by a simple chemical precipitation method. The effect of monoethanolamine (MEA) content in different solvents on ZnO NPs synthesis and their structural properties has been investigated. The NPs synthesized by using isopropanol (IPA) with 15 ml MEA as a stabilizer under the most favorable conditions (deposition time, td = 120 min, temperature = 60 °C) showed good structural properties. Synthesized NPs exhibited beneficial structural properties after annealing. The hexagonal wurtzite crystal structure of ZnO NPs was verified by XRD. Different models were used to calculate structural parameters such as crystallite size, strain, stress, and energy density for all the reflection peaks of XRD corresponding to ZnO lying in the range 2θ = 15⁰-80⁰. The crystallite size of the ZnO nanoparticles was found to be 50-60 nm. FTIR and EDX confirmed the presence of ZnO NPs in the samples. SEM micrograph of all the samples revealed that the grain sizes decrease gradually with the increase of the amount of MEA. UV-Visible diffuse reflectance spectroscopy results provide evidence that the ZnO NPs possess broader absorption bands, together with high band gap energy. The ZnO NPs synthesized with IPA solvent have the highest transmittance and band gap energy of 3.3eV. According to DLS data, various content of MEA stabilizer in solvent affects the hydrodynamic size of ZnO NPs.
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Affiliation(s)
| | | | - F.T.Z. Toma
- Experimental Physics Division, Atomic Energy Centre, Dhaka-1000, Bangladesh
| | - M.A. Zubair
- Department of Nanomaterials and Ceramic Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh
| | - M.T. Chowdhury
- Institute of Energy Science, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, P.O Box 3787, Dhaka-1000, Bangladesh
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8
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Hauck M, Saure LM, Zeller-Plumhoff B, Kaps S, Hammel J, Mohr C, Rieck L, Nia AS, Feng X, Pugno NM, Adelung R, Schütt F. Overcoming Water Diffusion Limitations in Hydrogels via Microtubular Graphene Networks for Soft Actuators. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302816. [PMID: 37369361 DOI: 10.1002/adma.202302816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/22/2023] [Accepted: 06/23/2023] [Indexed: 06/29/2023]
Abstract
Hydrogel-based soft actuators can operate in sensitive environments, bridging the gap of rigid machines interacting with soft matter. However, while stimuli-responsive hydrogels can undergo extreme reversible volume changes of up to ≈90%, water transport in hydrogel actuators is in general limited by their poroelastic behavior. For poly(N-isopropylacrylamide) (PNIPAM) the actuation performance is even further compromised by the formation of a dense skin layer. Here it is shown, that incorporating a bioinspired microtube graphene network into a PNIPAM matrix with a total porosity of only 5.4% dramatically enhances actuation dynamics by up to ≈400% and actuation stress by ≈4000% without sacrificing the mechanical stability, overcoming the water transport limitations. The graphene network provides both untethered light-controlled and electrically powered actuation. It is anticipated that the concept provides a versatile platform for enhancing the functionality of soft matter by combining responsive and 2D materials, paving the way toward designing soft intelligent matter.
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Affiliation(s)
- Margarethe Hauck
- Functional Nanomaterials, Department of Materials Science, Kiel University, 24143, Kiel, Germany
| | - Lena M Saure
- Functional Nanomaterials, Department of Materials Science, Kiel University, 24143, Kiel, Germany
| | - Berit Zeller-Plumhoff
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, 24118, Kiel, Germany
| | - Sören Kaps
- Functional Nanomaterials, Department of Materials Science, Kiel University, 24143, Kiel, Germany
| | - Jörg Hammel
- Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Caprice Mohr
- Functional Nanomaterials, Department of Materials Science, Kiel University, 24143, Kiel, Germany
| | - Lena Rieck
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Ali Shaygan Nia
- Department of Chemistry and Food Chemistry, Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062, Dresden, Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle, Germany
| | - Xinliang Feng
- Department of Chemistry and Food Chemistry, Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, 01062, Dresden, Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle, Germany
| | - Nicola M Pugno
- Laboratory for Bioinspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, Trento, I-38123, Italy
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Rainer Adelung
- Functional Nanomaterials, Department of Materials Science, Kiel University, 24143, Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, 24118, Kiel, Germany
| | - Fabian Schütt
- Functional Nanomaterials, Department of Materials Science, Kiel University, 24143, Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, 24118, Kiel, Germany
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9
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Poschmann MM, Siebert L, Lupan C, Lupan O, Schütt F, Adelung R, Stock N. Surface Conversion of ZnO Tetrapods Produces Pinhole-Free ZIF-8 Layers for Selective and Sensitive H 2 Sensing Even in Pure Methane. ACS APPLIED MATERIALS & INTERFACES 2023; 15:38674-38681. [PMID: 37527811 PMCID: PMC10436243 DOI: 10.1021/acsami.3c06317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 07/07/2023] [Indexed: 08/03/2023]
Abstract
As the necessary transition to a supply of renewable energy moves forward rapidly, hydrogen (H2) becomes increasingly important as a green chemical energy carrier. The manifold applications associated with the use of hydrogen in the energy sector require sensor materials that can efficiently detect H2 in small quantities and in gas mixtures. As a possible candidate, we here present a metal-organic framework (MOF, namely ZIF-8) functionalized metal-oxide gas sensor (MOS, namely ZnO). The gas sensor is based on single-crystalline tetrapodal ZnO (t-ZnO) microparticles, which are coated with a thin layer of ZIF-8 ([Zn(C4H5N2)2]) by a ZnO conversion reaction to obtain t-ZnO@ZIF-8 (core@shell) composites. The vapor-phase synthesis enables ZIF-8 thickness control as shown by powder X-ray diffraction, thermogravimetric analysis, and N2 sorption measurements. Gas-sensing measurements of a single microrod of t-ZnO@ZIF-8 composite demonstrate the synergistic benefits of both MOS sensors and MOFs, resulting in an outstanding high selectivity, sensitivity (S ≅ 546), and response times (1-2 s) to 100 ppm H2 in the air at a low operation temperature of 100 °C. Under these conditions, no response to acetone, n-butanol, methane, ethanol, ammonia, 2-propanol, and carbon dioxide was observed. Thereby, the sensor is able to reliably detect H2 in mixtures with air and even methane, with the latter being highly important for determining the H2 dilution level in natural gas pipelines, which is of great importance to the energy sector.
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Affiliation(s)
- Mirjam
P. M. Poschmann
- Institute
for Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
| | - Leonard Siebert
- Department
of Materials Science, Chair for Functional Nanomaterials, Faculty
of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Cristian Lupan
- Department
of Microelectronics and Biomedical Engineering, Center
for Nanotechnology and Nanosensors, Technical
University of Moldova, 168 Stefan cel Mare Avenue, MD-2004 Chisinau, Republic of Moldova
| | - Oleg Lupan
- Department
of Materials Science, Chair for Functional Nanomaterials, Faculty
of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
- Department
of Microelectronics and Biomedical Engineering, Center
for Nanotechnology and Nanosensors, Technical
University of Moldova, 168 Stefan cel Mare Avenue, MD-2004 Chisinau, Republic of Moldova
| | - Fabian Schütt
- Department
of Materials Science, Chair for Functional Nanomaterials, Faculty
of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Rainer Adelung
- Department
of Materials Science, Chair for Functional Nanomaterials, Faculty
of Engineering, Kiel University, Kaiserstraße 2, D-24143 Kiel, Germany
| | - Norbert Stock
- Institute
for Inorganic Chemistry, Kiel University, Max-Eyth-Straße 2, 24118 Kiel, Germany
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10
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Ilickas M, Marčinskas M, Peckus D, Mardosaitė R, Abakevičienė B, Tamulevičius T, Račkauskas S. ZnO UV Sensor Photoresponse Enhancement by Coating Method Optimization. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2023. [DOI: 10.1016/j.jpap.2023.100171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
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11
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Ejsmont A, Goscianska J. Hydrothermal Synthesis of ZnO Superstructures with Controlled Morphology via Temperature and pH Optimization. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16041641. [PMID: 36837292 PMCID: PMC9960931 DOI: 10.3390/ma16041641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/12/2023] [Accepted: 02/14/2023] [Indexed: 05/14/2023]
Abstract
Zinc oxide, as a widely used material in optics, electronics, and medicine, requires a complete overview of different conditions for facile and easily reproducible syntheses. Two types of optimization of ZnO hydrothermal preparation from zinc acetate and sodium hydroxide solution are presented, which allowed for obtaining miscellaneous morphologies of materials. The first was a temperature-controlled synthesis from 100 to 200 °C, using citric acid as a capping agent. The formation of hexagonal rods at the lowest temperature was evidenced, which agglomerated to flower-like structures at 110 and 120 °C. It was followed by transformation to flake-like roses at 160 °C, up to disordered structures composed of nanosized plates (>180 °C). The transformations were generated through a temperature change, which had an impact on the diffusion effect of hydroxide and citrate complexes. The second optimization was the hydrothermal synthesis free of organic additives and it included only a pH variation from 7.5 to 13.5. It was found that by utilizing a slow-dropping process and varying amounts of NaOH solutions, it is possible to obtain well-formed hexagonal pellets at pH 8.0-8.5. Strongly basic conditions of pH 11.0 and 13.5 impeded superstructure formations, giving small elongated particles of ZnO. All samples were characterized by high phase purity and crystallinity, with a specific surface area of 18-37 m2/g, whereas particle size distribution indicated a predominance of small particles (<1 μm).
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12
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Büter A, Maschkowitz G, Baum M, Mishra YK, Siebert L, Adelung R, Fickenscher H. Antibacterial Activity of Nanostructured Zinc Oxide Tetrapods. Int J Mol Sci 2023; 24:ijms24043444. [PMID: 36834854 PMCID: PMC9964984 DOI: 10.3390/ijms24043444] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/11/2023] Open
Abstract
Zinc oxide (ZnO) tetrapods as microparticles with nanostructured surfaces show peculiar physical properties and anti-infective activities. The aim of this study was to investigate the antibacterial and bactericidal properties of ZnO tetrapods in comparison to spherical, unstructured ZnO particles. Additionally, killing rates of either methylene blue-treated or untreated tetrapods and spherical ZnO particles for Gram-negative and Gram-positive bacteria species were determined. ZnO tetrapods showed considerable bactericidal activity against Staphylococcus aureus, and Klebsiella pneumoniae isolates, including multi-resistant strains, while Pseudomonas aeruginosa and Enterococcus faecalis remained unaffected. Almost complete elimination was reached after 24 h for Staphylococcus aureus at 0.5 mg/mL and Klebsiella pneumoniae at 0.25 mg/mL. Surface modifications of spherical ZnO particles by treatment with methylene blue even improved the antibacterial activity against Staphylococcus aureus. Nanostructured surfaces of ZnO particles provide active and modifiable interfaces for the contact with and killing of bacteria. The application of solid state chemistry, i.e., the direct matter-to-matter interaction between active agent and bacterium, in the form of ZnO tetrapods and non-soluble ZnO particles, can add an additional principle to the spectrum of antibacterial mechanisms, which is, in contrast to soluble antibiotics, depending on the direct local contact with the microorganisms on tissue or material surfaces.
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Affiliation(s)
- Aike Büter
- Institute for Infection Medicine, University Medical Center Schleswig-Holstein, Christian-Albrecht University of Kiel, 24105 Kiel, Germany
| | - Gregor Maschkowitz
- Institute for Infection Medicine, University Medical Center Schleswig-Holstein, Christian-Albrecht University of Kiel, 24105 Kiel, Germany
| | - Martina Baum
- Functional Nanomaterials, Institute of Material Science, Christian-Albrecht University of Kiel, 24143 Kiel, Germany
| | - Yogendra Kumar Mishra
- Smart Materials, NanoSYD, Mads Clausen Institute, University of Southern Denmark, 6400 Sønderburg, Denmark
| | - Leonard Siebert
- Functional Nanomaterials, Institute of Material Science, Christian-Albrecht University of Kiel, 24143 Kiel, Germany
- Kiel Nano, Surface and Interface Science (KiNSIS), Christian-Albrecht University of Kiel, 24118 Kiel, Germany
| | - Rainer Adelung
- Functional Nanomaterials, Institute of Material Science, Christian-Albrecht University of Kiel, 24143 Kiel, Germany
- Kiel Nano, Surface and Interface Science (KiNSIS), Christian-Albrecht University of Kiel, 24118 Kiel, Germany
| | - Helmut Fickenscher
- Institute for Infection Medicine, University Medical Center Schleswig-Holstein, Christian-Albrecht University of Kiel, 24105 Kiel, Germany
- Correspondence: ; Tel.: +49-431-500-15300
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13
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Habib A, Ikram M, Haider A, Ul-Hamid A, Shahzadi I, Haider J, Kanoun MB, Goumri-Said S, Nabgan W. Experimental and theoretical study of catalytic dye degradation and bactericidal potential of multiple phase Bi and MoS 2 doped SnO 2 quantum dots †. RSC Adv 2023; 13:10861-10872. [PMID: 37033429 PMCID: PMC10077344 DOI: 10.1039/d3ra00698k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 03/30/2023] [Indexed: 04/08/2023] Open
Abstract
In the present study, different concentrations (1 and 3%) of Bi were incorporated into a fixed amount of molybdenum disulfide (MoS2) and SnO2 quantum dots (QDs) by co-precipitation technique. This research aimed to increase the efficacy of dye degradation and bactericidal behavior of SnO2. The high recombination rate of SnO2 can be decreased upon doping with two-dimensional materials (MoS2 nanosheets) and Bi metal. These binary dopants-based SnO2 showed a significant role in methylene blue (MB) dye degradation in various pH media and antimicrobial potential as more active sites are provided by nanostructured MoS2 and Bi3+ is responsible for producing a variety of different oxygen vacancies within SnO2. The prepared QDs were described via morphology, optical characteristics, elemental composition, functional group, phase formation, crystallinity, and d-spacing. In contrast, antimicrobial activity was checked at high and low dosages against Escherichia coli (E. coli) and the inhibition zone was calculated utilizing a Vernier caliper. Furthermore, prepared samples have expressed substantial antimicrobial effects against E. coli. To further explore the interactions between the MB and Bi/MoS2–SnO2 composite, we modeled and calculated the MB adsorption using density functional theory and the Heyd–Scuseria–Ernzerhof hybrid (HSE06) approach. There is a relatively strong interaction between the MB molecule and Bi/MoS2–SnO2 composite. In the present study, different concentrations (1 and 3%) of Bi were incorporated into a fixed amount of molybdenum disulfide and SnO2 quantum dots by co-precipitation technique. This research aimed to increase the efficacy of dye degradation and bactericidal behavior of SnO2.![]()
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Affiliation(s)
- Ayesha Habib
- Solar Cell Applications Research Lab, Department of Physics, Government College University LahoreLahore54000PunjabPakistan
| | - Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University LahoreLahore54000PunjabPakistan
| | - Ali Haider
- Department of Clinical Sciences, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture (MNSUA) Multan66000Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, Research Institute, King Fahd University of Petroleum & MineralsDhahran31261Saudi Arabia
| | - Iram Shahzadi
- Faculty of Pharmacy, The University of Lahore54000Pakistan
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of SciencesTianjin 300308China
| | - Mohammed Benali Kanoun
- Department of Mathematics and Sciences, College of Humanities and Sciences, Prince Sultan UniversityP.O. Box 66833Riyadh 11586Saudi Arabia
| | - Souraya Goumri-Said
- Physics Department, College of Science and General Studies, Alfaisal UniversityP.O. Box 50927Riyadh 11533Saudi Arabia
| | - Walid Nabgan
- Departament d’Enginyeria Química, Universitat Rovira i VirgiliAv Països Catalans 2643007TarragonaSpain
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14
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Liu Y, Yang X. Effects of Fe doping on the magnetic and absorption spectrum of graphene-like ZnO monolayer from first-principles calculations. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2022.111742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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In Vitro Evaluation of Zinc Oxide Tetrapods as a New Material Component for Glaucoma Implants. Life (Basel) 2022; 12:life12111805. [DOI: 10.3390/life12111805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/03/2022] [Accepted: 11/05/2022] [Indexed: 11/09/2022] Open
Abstract
In our previous study we were able to show that zinc oxide (ZnO) tetrapods inhibit wound healing processes. Therefore, the aim of this study was to test the antiproliferative effect of two types of porous polydimethylsiloxane (PDMS)/ tetrapodal zinc oxide (ZnO-T) materials, as well as their usability for glaucoma implants. To find the best implant material, two different porous PDMS/ZnO-T materials were examined. One consisted of 3D interconnected PDMS coarse-pored foams with protruding ZnO-T particles; the other consisted of fine-pored 3D interconnected ZnO-T networks homogeneously coated by a thin PDMS film in the nanometer range. Fibroblast cell viability was investigated for both materials via MTT dye, and some implant material samples were further processed for electron microscopy. Both PDMS/ZnO-T materials showed reduced cell viability in the MTT staining. Furthermore, the electron microscopy revealed barely any fibroblasts growing on the implant materials. At the surface of the fine-pored implant material, however, fibroblasts could not be observed in the etched control samples without ZnO-T. It was found that post-processing of the material to the final stent diameter was highly challenging and that the fabrication method, therefore, had to be adapted. In conclusion, we were able to demonstrate the antiproliferative potential of the two different PDMS/ZnO-T materials. Furthermore, smaller pore size (in the range of tens of micrometers) in the implant material seems to be preferable.
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16
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Zinc Oxide Tetrapods Modulate Wound Healing and Cytokine Release In Vitro—A New Antiproliferative Substance in Glaucoma Filtering Surgery. Life (Basel) 2022; 12:life12111691. [DOI: 10.3390/life12111691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/14/2022] [Accepted: 10/19/2022] [Indexed: 01/03/2023] Open
Abstract
Glaucoma filtering surgery is applied to reduce intraocular pressure (IOP) in cases of uncontrolled glaucoma. However, postoperative fibrosis reduces the long-term success of both standard trabeculectomy and microstents. The aim of this study was to test the antiproliferative and anti-inflammatory potential of ZnO-tetrapods (ZnO-T) on human Tenon’s fibroblasts (HTFs) for glaucoma surgery. The toxicity of ZnO-T on HTFs was determined using an MTT test. For analysis of fibroblast proliferation, migration, and transdifferentiation, cultures were stained for Ki67, alpha-smooth muscle actin (α-SMA), and p-SMAD. A fully quantitative multiplex ELISA was used to determine the concentrations of different cytokines, platelet-derived growth factor (PDGF), and hepatocyte growth factor (HGF) in culture supernatants with and without previous ZnO-T treatment. Treatment with higher concentrations (10 and 20 µg/mL) was associated with HTF toxicity, as shown in the wound healing assay. Furthermore, the number of Ki67, α-SMA-positive, and pSMAD-positive cells, as well as IL-6 and HGF in supernatants, were significantly reduced following incubation with ZnO-T. In conclusion, we were able to show the antiproliferative and anti-inflammatory potentials of ZnO-T. Therefore, the use of ZnO-T may provide a new approach to reducing postoperative fibrosis in glaucoma filtering surgery.
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17
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Knoepfel A, Liu N, Hou Y, Sujani S, dos Reis BR, White R, Wang K, Poudel B, Gupta S, Priya S. Development of Tetrapod Zinc Oxide-Based UV Sensor for Precision Livestock Farming and Productivity. BIOSENSORS 2022; 12:837. [PMID: 36290974 PMCID: PMC9599082 DOI: 10.3390/bios12100837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/01/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
In order to ensure the health and welfare of livestock, there has been an emphasis on precision farming of ruminant animals. Monitoring the life index of ruminant animals is of importance for intelligent farming. Here, a wearable sensor for monitoring ultraviolet (UV) radiation is demonstrated to understand the effect of primary and secondary photosensitization on dairy animals. Thin films of wide bandgap semiconductor zinc oxide (ZnO) comprising multilevel of nanostructures from microparticles (MP) to nanoparticles (NP), and tetrapod (T-ZnO), were prepared as the UV sensing active materials. The sensitivity was evaluated by exposing the films to various radiation sources, i.e., 365 nm (UV A), 302 nm (UV B), and 254 nm (UV C), and measuring the electrical resistance change. T-ZnO is found to exhibit higher sensitivity and stable response (on/off) upon exposure to UV A and UV B radiation, which is attributed to their higher surface area, aspect ratio, porosity, and interconnective networks inducing a high density of chemical interaction sites and consequently improved photocurrent generation. A wearable sensor using T-ZnO is packaged and attached to a collar for dynamic monitoring of UV response on ruminant animals (e.g., sheep in this study). The excellent performance of T-ZnO wearable sensors for ruminant animals also holds the potential for a wider range of applications such as residential buildings and public spaces.
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Affiliation(s)
- Abbey Knoepfel
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Na Liu
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Yuchen Hou
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Sathya Sujani
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Barbara Roqueto dos Reis
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Robin White
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Kai Wang
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Bed Poudel
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Sanju Gupta
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Shashank Priya
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA 16802, USA
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18
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Zhu H, Shen Y, Zhang Q, Fang Q, Chen L, Yang X, Wang B. Recycled Bifunctional Heterostructure Material: g-GaN/SnS for Photocatalytic Decomposition of Water and Efficient Detection of NO 2. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:10886-10892. [PMID: 36001800 DOI: 10.1021/acs.langmuir.2c01725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Recently, the energy crisis and environmental pollution problems have become increasingly severe. There is an urgent need to develop a class of multifunctional materials that can both produce clean energy and detect harmful gases. Herein, we propose a g-GaN/SnS heterostructure and explored its dual-optimal performance in photocatalytic hydrogen production and gas detection. Our results demonstrated that the g-GaN/SnS heterostructure has a suitable type II band alignment and excellent absorption in the visible range, which both indicate its potential application in photocatalysis. Furthermore, when the g-GaN/SnS heterostructure acted as a gas detection material, it was consistently susceptible to NO2 gas molecules, according to charge transfer. Additionally, it has a very suitable material recovery time (∼0.5 h) when used for NO2 detection, illustrating the recyclability of the material. Interestingly, the applied electric field of -0.4 V/Å can greatly increase the absorption coefficient in the visible range to 150% of the original. Also, the applied electric field of 0.6 V/Å can substantially enhance the gas detection sensitivity by 27% compared to the case without the electric field. Thus, the g-GaN/SnS heterostructure we proposed not only has the advantage of being bifunctional but also has the potential to be recycled.
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Affiliation(s)
- Hua Zhu
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China
| | - Yang Shen
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China
- School of Materials Science and Engineering, Zhejiang University, Zhejiang 310027, China
| | - Qihao Zhang
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China
| | - Qianglong Fang
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China
| | - Liang Chen
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China
| | - Xiaodong Yang
- Key Laboratory of Ecophysics and Department of Physics, Shihezi University, Xinjiang 832003, China
| | - Baolin Wang
- College of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
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19
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Kiyomi Y, Shiraiwa N, Nakazawa T, Fukawa A, Oshio K, Takase K, Ito T, Shingubara S, Shimizu T. Fabrication and UV photoresponse of ordered ZnO nanonets using monolayer colloidal crystal template. MICRO AND NANO ENGINEERING 2022. [DOI: 10.1016/j.mne.2022.100160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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20
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Islam M, Dolle C, Sadaf A, Weidler PG, Sharma B, Eggeler YM, Mager D, Korvink JG. Electrospun carbon nanofibre-assisted patterning of metal oxide nanostructures. MICROSYSTEMS & NANOENGINEERING 2022; 8:71. [PMID: 35782293 PMCID: PMC9240016 DOI: 10.1038/s41378-022-00409-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 03/14/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
This work establishes carbon nanofibre-mediated patterning of metal oxide nanostructures, through the combination of electrospinning and vapor-phase transport growth. Electrospinning of a suitable precursor with subsequent carbonization results in the patterning of catalyst gold nanoparticles embedded within carbon nanofibres. During vapor-phase transport growth, these nanofibres allow preferential growth of one-dimensional metal oxide nanostructures, which grow radially outward from the nanofibril axis, yielding a hairy caterpillar-like morphology. The synthesis of metal oxide caterpillars is demonstrated using zinc oxide, indium oxide, and tin oxide. Source and substrate temperatures play the most crucial role in determining the morphology of the metal oxide caterpillars, whereas the distribution of the nanofibres also has a significant impact on the overall morphology. Introducing the current methodology with near-field electrospinning further facilitates user-defined custom patterning of metal oxide caterpillar-like structures.
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Affiliation(s)
- Monsur Islam
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christian Dolle
- Microscopy of Nanoscale Structures & Mechanisms (MNM), Laboratory for Electron Microscopy (LEM), Karlsruhe Institute of Technology, Engesserstr. 7, D-76131 Karlsruhe, Germany
| | - Ahsana Sadaf
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Peter G. Weidler
- Institut für Funktionelle Grenzflächen, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Bharat Sharma
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Yolita M. Eggeler
- Microscopy of Nanoscale Structures & Mechanisms (MNM), Laboratory for Electron Microscopy (LEM), Karlsruhe Institute of Technology, Engesserstr. 7, D-76131 Karlsruhe, Germany
| | - Dario Mager
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Jan G. Korvink
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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21
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Phenol removal and hydrogen production from water: Silver nanoparticles decorated on polyaniline wrapped zinc oxide nanorods. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.02.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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22
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Fabrication and Modelling of a Reservoir-Based Drug Delivery System for Customizable Release. Pharmaceutics 2022; 14:pharmaceutics14040777. [PMID: 35456611 PMCID: PMC9025308 DOI: 10.3390/pharmaceutics14040777] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 03/29/2022] [Accepted: 03/29/2022] [Indexed: 01/27/2023] Open
Abstract
Localized therapy approaches have emerged as an alternative drug administration route to overcome the limitations of systemic therapies, such as the crossing of the blood–brain barrier in the case of brain tumor treatment. For this, implantable drug delivery systems (DDS) have been developed and extensively researched. However, to achieve an effective localized treatment, the release kinetics of DDS needs to be controlled in a defined manner, so that the concentration at the tumor site is within the therapeutic window. Thus, a DDS, with patient-specific release kinetics, is crucial for the improvement of therapy. Here, we present a computationally supported reservoir-based DDS (rDDS) development towards patient-specific release kinetics. The rDDS consists of a reservoir surrounded by a polydimethylsiloxane (PDMS) microchannel membrane. By tailoring the rDDS, in terms of membrane porosity, geometry, and drug concentration, the release profiles can be precisely adapted, with respect to the maximum concentration, release rate, and release time. The release is investigated using a model dye for varying parameters, leading to different distinct release profiles, with a maximum release of up to 60 days. Finally, a computational simulation, considering exemplary in vivo conditions (e.g., exchange of cerebrospinal fluid), is used to study the resulting drug release profiles, demonstrating the customizability of the system. The establishment of a computationally supported workflow, for development towards a patient-specific rDDS, in combination with the transfer to suitable drugs, could significantly improve the efficacy of localized therapy approaches.
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Graphene Oxide Framework Structures and Coatings: Impact on Cell Adhesion and Pre-Vascularization Processes for Bone Grafts. Int J Mol Sci 2022; 23:ijms23063379. [PMID: 35328815 PMCID: PMC8955516 DOI: 10.3390/ijms23063379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/04/2022] [Accepted: 03/17/2022] [Indexed: 02/01/2023] Open
Abstract
Graphene oxide (GO) is a promising material for bone tissue engineering, but the validation of its molecular biological effects, especially in the context of clinically applied materials, is still limited. In this study, we compare the effects of graphene oxide framework structures (F-GO) and reduced graphene oxide-based framework structures (F-rGO) as scaffold material with a special focus on vascularization associated processes and mechanisms in the bone. Highly porous networks of zinc oxide tetrapods serving as sacrificial templates were used to create F-GO and F-rGO with porosities >99% consisting of hollow interconnected microtubes. Framework materials were seeded with human mesenchymal stem cells (MSC), and the cell response was evaluated by confocal laser scanning microscopy (CLSM), deoxyribonucleic acid (DNA) quantification, real-time polymerase chain reaction (RT-PCR), enzyme-linked immunosorbent assay (ELISA), and alkaline phosphatase activity (ALP) to define their impact on cellular adhesion, osteogenic differentiation, and secretion of vascular growth factors. F-GO based scaffolds improved adhesion and growth of MSC as indicated by CLSM and DNA quantification. Further, F-GO showed a better vascular endothelial growth factor (VEGF) binding capacity and improved cell growth as well as the formation of microvascular capillary-like structures in co-cultures with outgrowth endothelial cells (OEC). These results clearly favored non-reduced graphene oxide in the form of F-GO for bone regeneration applications. To study GO in the context of a clinically used implant material, we coated a commercially available xenograft (Bio-Oss® block) with GO and compared the growth of MSC in monoculture and in coculture with OEC to the native scaffold. We observed a significantly improved growth of MSC and formation of prevascular structures on coated Bio-Oss®, again associated with a higher VEGF binding capacity. We conclude that graphene oxide coating of this clinically used, but highly debiologized bone graft improves MSC cell adhesion and vascularization.
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Wang X, Xu S, Chalmers E, Chen X, Liu Y, Liu X. Entangled ZnO on Ultrathin Hollow Fibers for UV-Aided Pollutant Decomposition. ACS APPLIED MATERIALS & INTERFACES 2022; 14:10769-10781. [PMID: 35188732 PMCID: PMC9098110 DOI: 10.1021/acsami.1c21554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/09/2022] [Indexed: 06/14/2023]
Abstract
Zinc oxide (ZnO), a widely used ultraviolet (UV) degrading substance, offers high selectivity for wastewater treatment, but the leaching of ZnO into water could cause secondary contamination. Using porous substrates to fix and load ZnO is a promising technical method to improve the water purification efficiency and recycling durability of ZnO. However, limited by the slow kinetics and shielding effects, it is challenging to use traditional techniques to introduce ZnO into the interior of a hollow structure. Here, inspired by an ancient dyeing procedure, we formed a unique single-molecule bio-interfacial entanglement as an absorption layer to capture the catalyst for ZnO electroless deposition (ELD) on the surface of natural ultrathin hollow-structured Kapok fibers. With curcumin serving as a linking bridge, ELD allowed the spontaneous formation of intensive ZnO nanocrystals on both the outer and inner walls. ZnO-kapok as the catalyst for ultraviolet photodecomposition of organic pollutants (methylene blue (MB) and phenol as model pollutants) delivered a decomposition efficiency of 80% and outstanding durability. Further modification of the ZnO-kapok catalyst by doping with reduced graphene oxide (rGO) showed an improvement in photodegradation performance of 90% degradation under 2-h irradiation with 21.85 W/dm2 light power. Moreover, to the best of our knowledge, this is the first report featuring ZnO loading on both the outer and inner walls of a fiber-structured hollow kapok material, which provides inspiration for immobilization of metallic oxides on hollow-structured materials for further applications in renewable catalysis, chemical engineering, and energy storage fields.
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Affiliation(s)
- Xi Wang
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Shaojun Xu
- UK
Catalysis Hub, Research Complex at Harwell, Didcot OX11 0FA, U.K.
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, U.K.
| | - Evelyn Chalmers
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Xiaogang Chen
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Yong Liu
- School
of Textile, Tiangong University, No. 399 Bin Shui Xi Road, Xi Qing District, Tianjin 300387, P. R. China
| | - Xuqing Liu
- Department
of Materials, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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25
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Kovács Z, Molnár C, Gyulavári T, Magyari K, Tóth ZR, Baia L, Pap Z, Hernádi K. Solvothermal synthesis of ZnO spheres: tuning the structure and morphology from nano- to micro-meter range and its impact on their photocatalytic activity. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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26
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Kumar S Kumar S, Kaushik RD, Purohit LP. ZnO-CdO nanocomposites incorporated with graphene oxide nanosheets for efficient photocatalytic degradation of bisphenol A, thymol blue and ciprofloxacin. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127332. [PMID: 34607025 DOI: 10.1016/j.jhazmat.2021.127332] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 09/11/2021] [Accepted: 09/21/2021] [Indexed: 05/27/2023]
Abstract
The widespread existence of different organic contaminants mostly phenolic compounds, organic dyes and antibiotics in water bodies initiated by the various industrial wastes that raised great scientific concern and public awareness as well recently owing to their prospective capability to spread these contaminants resistant gene and pose hazard to human. In the present study, a series of nanostructured ZnO-CdO incorporated with reduced graphene oxide (ZCG nanocomposites) were successfully synthesized by a simple refluxing method and characterized by using the X-ray diffraction (XRD), Raman spectroscopy, FT-IR spectroscopy, photoluminescence spectroscopy, field emission-scanning microscope (FE-SEM) and UV-visible diffused reflectance spectroscopy (DRS) for the photocatalytic degradation of bisphenol A (BPA), thymol blue (ThB) and ciprofloxacin (CFn) with illumination of UV light. The maximum degradation and mineralization of BPA, ThB and CFn was achieved around 98.5%, 98.38% and 99.28% over the ZCG-5 nanocomposite photocatalyst after UV light irradiation for 180 min, 120 min and 75 min, respectively. The superior photocatalytic activity of ZCG-5 ascribed to enhance adsorption capacity, effective separation of charge carriers consequential for the production of more ROS after incorporation of RGO nanosheets with ZnO-CdO in photocatalyst. The conceivable photocatalytic degradation mechanism of BPA, ThB and CFn was elucidated through ROS identification and the assessment of photocatalyst stability by reusability, EEO (kwh/m3order) and UV light dose (mJ/cm2) were evaluated. The plausible photocatalytic degradation pathways were proposed for the degradation of BPA, ThB and CFn via GC-MS analysis. The present work investigates the efficient removal of BPA, ThB and CFn using ZCG nanocomposites as photocatalyst.
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Affiliation(s)
- Sonu Kumar S Kumar
- Department of Chemistry, Gurukula Kangri (Deemed University), Haridwar, India
| | - R D Kaushik
- Department of Chemistry, Gurukula Kangri (Deemed University), Haridwar, India
| | - L P Purohit
- Department of Physics, Gurukula Kangri (Deemed University), Haridwar, India.
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27
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Asaithambi S, Balaji V, Karuppaiah M, Sakthivel P, Muhil Eswari K, Yuvakkumar R, Selvakumar P, Velauthapillai D, Ravi G. The electrochemical energy storage and photocatalytic performances analysis of rare earth metal (Tb and Y) doped SnO2@CuS composites. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103442] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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28
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Kohlmann N, Hansen L, Lupan C, Schürmann U, Reimers A, Schütt F, Adelung R, Kersten H, Kienle L. Fabrication of ZnO Nanobrushes by H 2-C 2H 2 Plasma Etching for H 2 Sensing Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:61758-61769. [PMID: 34907774 DOI: 10.1021/acsami.1c18679] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Zinc oxide has widespread use in diverse applications due to its distinct properties. Many of these applications benefit from controlling the morphology on the nanoscale, where for example gas sensing is strongly enhanced for high surface-to-volume ratios. In this work the formation of novel ZnO nanobrushes by plasma etching treatment as a new approach is presented. The morphology and structure of the ZnO nanobrushes are studied in detail by transmission and scanning electron microscopy. It is revealed that ZnO nanobrush structures are fabricated by self-patterned preferential etching of ZnO microtetrapods in a hydrogen-acetylene plasma. The etching process was found to be most effective at 1% C2H2 admixture. Nanowire arrays are formed enabled by sidewall passivation due to a-C:H deposition. The nanobrush structures are further stabilized by simultaneous deposition of a SiOx layer from the opposite direction. Highly sensitive (gas response S = 148), selective, and fast (response time 15 s, recovery time 6 s) hydrogen sensors are fabricated from single nanobrushes. Single nanobrush sensors show enhanced sensing performance in increased gas response S of at least 10 times and improved response as well as recovery times when compared to nonporous single ZnO nanorod sensors due to the small diameters (≈50 nm) of the formed nanowires as well as the strongly enhanced surface-to-volume ratio of the nanobrushes by a factor of more than 10.
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Affiliation(s)
- Niklas Kohlmann
- Institute for Materials Science, Kiel University, 24143 Kiel, Germany
| | - Luka Hansen
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Cristian Lupan
- Center for Nanotechnology and Nanosensors, Department of Microelectronics and Biomedical Engineering, Technical University of Moldova, Chişinǎu 2004, Moldova
| | - Ulrich Schürmann
- Institute for Materials Science, Kiel University, 24143 Kiel, Germany
| | - Armin Reimers
- Institute for Materials Science, Kiel University, 24143 Kiel, Germany
| | - Fabian Schütt
- Institute for Materials Science, Kiel University, 24143 Kiel, Germany
| | - Rainer Adelung
- Institute for Materials Science, Kiel University, 24143 Kiel, Germany
| | - Holger Kersten
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Lorenz Kienle
- Institute for Materials Science, Kiel University, 24143 Kiel, Germany
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29
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Kumar S, Kaushik R, Purohit L. Hetro-nanostructured Se-ZnO sustained with RGO nanosheets for enhanced photocatalytic degradation of p-Chlorophenol, p-Nitrophenol and Methylene blue. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119219] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Hindenlang B, Gapeeva A, Baum MJ, Kaps S, Saure LM, Rasch F, Hammel J, Moosmann J, Storm M, Adelung R, Schütt F, Zeller-Plumhoff B. Evaporation kinetics in highly porous tetrapodal zinc oxide networks studied using in situ SRµCT. Sci Rep 2021; 11:20272. [PMID: 34642393 PMCID: PMC8511110 DOI: 10.1038/s41598-021-99624-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/23/2021] [Indexed: 11/08/2022] Open
Abstract
Tetrapodal zinc oxide (t-ZnO) is used to fabricate polymer composites for many different applications ranging from biomedicine to electronics. In recent times, macroscopic framework structures from t-ZnO have been used as a versatile sacrificial template for the synthesis of multi-scaled foam structures from different nanomaterials such as graphene, hexagonal boron nitride or gallium nitride. Many of these fabrication methods rely on wet-chemical coating processes using nanomaterial dispersions, leading to a strong interest in the actual coating mechanism and factors influencing it. Depending on the type of medium (e.g. solvent) used, different results regarding the homogeneity of the nanomaterial coating can be achieved. In order to understand how a medium influences the coating behavior, the evaporation process of water and ethanol is investigated in this work using in situ synchrotron radiation-based micro computed tomography (SRµCT). By employing propagation-based phase contrast imaging, both the t-ZnO network and the medium can be visualized. Thus, the evaporation process can be monitored non-destructively in three dimensions. This investigation showed that using a polar medium such as water leads to uniform evaporation and, by that, a homogeneous coating of the entire network.
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Affiliation(s)
- Birte Hindenlang
- Institute of Metallic Biomaterials, Helmholtz Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502, Geesthacht, Germany.
| | - Anna Gapeeva
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Martina J Baum
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Sören Kaps
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Lena M Saure
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Florian Rasch
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Jörg Hammel
- Institute of Materials Physics, Helmholtz Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502, Geesthacht, Germany
| | - Julian Moosmann
- Institute of Materials Physics, Helmholtz Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502, Geesthacht, Germany
| | - Malte Storm
- Diamond Light Source Ltd., Diamond House, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK
| | - Rainer Adelung
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Fabian Schütt
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany.
| | - Berit Zeller-Plumhoff
- Institute of Metallic Biomaterials, Helmholtz Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502, Geesthacht, Germany.
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31
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Reddeppa M, Nam DJ, Bak NH, Pasupuleti KS, Woo H, Kim SG, Oh JE, Kim MD. Proliferation of the Light and Gas Interaction with GaN Nanorods Grown on a V-Grooved Si(111) Substrate for UV Photodetector and NO 2 Gas Sensor Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:30146-30154. [PMID: 34143594 DOI: 10.1021/acsami.1c04469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Although excellent milestones of III-nitrides in optoelectronic devices have been achieved, the focus on the optimization of their geometrical structure for multiple applications is very rare. To address this issue, we exclusively designed a prototype device to enhance the photoconversion efficiency and gas interaction capabilities of GaN nanorods (NRs) grown on a V-grooved Si(100) substrate with Si(111) facets for photodetector and gas sensor applications. Photoluminescence studies have demonstrated an increased surface-to-volume ratio and light trapping for GaN NRs grown on V-grooved Si(111). GaN NRs on V-grooved Si(100) with Si(111) facets exhibited high photodetection performance in terms of photoresponsivity (217 mA/cm2), detectivity (3 × 1013 Jones), and external quantum efficiency (2.73 × 105%) compared to GaN NRs grown on plain Si(111). Owing to the robust interconnection between NRs and a high surface-to-volume ratio, the GaN NRs grown on V-grooved Si(100) with Si(111) facets probed for NO2 detection with the assistance of photonic energy. The photo-assisted sensing makes it possible to detect NO2 gas at the ppb level at room temperature, resulting in significant power reduction. The device showed high selectivity to NO2 against other target gases, such as NO, H2S, H2, NH3, and CO. The device showed excellent long-term stability at room temperature; the humidity effect on the device performance was also examined. The excellent device performance was due to the following: (i) benefited from the V-grooved Si structure, GaN NRs significantly trapped the incident light, which promoted high photocurrent conversion efficiency and (ii) GaN NRs grown on V-grooved Si(100) with Si(111) facets increased the surface-to-volume ratio and thus improved the gas interaction with a better diffusion ratio and high light trapping, which resulted in increased response/recovery times. These results represent an important forward step in prototype devices for multiple applications in materials research.
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Affiliation(s)
- Maddaka Reddeppa
- Institute of Quantum Systems, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Dong-Jin Nam
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Na-Hyun Bak
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | | | | | - Song-Gang Kim
- Department of Information and Communications, Joongbu University, 305 Donghen-ro, Goyang, Kyunggi-do 10279, Republic of Korea
| | - Jae-Eung Oh
- School of Electrical and Computer Engineering, Hangyang University, Ansan 15588, Republic of Korea
| | - Moon-Deock Kim
- Institute of Quantum Systems, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
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32
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Yang D, Gopal RA, Lkhagvaa T, Choi D. Oxidizing agent impacting on growth of ZnO tetrapod nanostructures and its characterization. ENVIRONMENTAL RESEARCH 2021; 197:111032. [PMID: 33757823 DOI: 10.1016/j.envres.2021.111032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/04/2021] [Accepted: 03/10/2021] [Indexed: 06/12/2023]
Abstract
In this paper, the fabrication of ZnO tetrapod was investigated. It was synthesized by the thermal oxidation technique using metal zinc powder mixed with oxidizing agents such as hydrogen peroxide (H2O2) and ammonium persulfate ((NH4)2S2O8). The furnace heating temperature reached at 1000 °C in the air. The average diameter and length of a tetrapod leg for mixture with H2O2 from SEM were 45.3 nm and 1.57 μm, respectively. The oxygen vacancy (36%) of ZnO tetrapod with H2O2 was higher than 33% of ZnO tetrapod with only Zn. Growth mechanism of ZnO tetrapod was processed via the formation of Zn nucleus and growing the wurtzite structure. The growing directions of ZnO crystal conformed with the [0001] direction. ZnO tetrapod showed up the high resolution TEM image with the lattice spacing 0.252 nm. From these results, this work was indicated that H2O2 solution was a better oxidizing reaction helper to make ZnO tetrapod nanostructures than anything else.
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Affiliation(s)
- Daejeong Yang
- School of Materials Science and Engineering, Hongik University, 2639, Sejong-ro, Jochiwon-eup Sejong City, 30016, South Korea
| | - Ramu Adam Gopal
- School of Materials Science and Engineering, Hongik University, 2639, Sejong-ro, Jochiwon-eup Sejong City, 30016, South Korea
| | - Telmenbayar Lkhagvaa
- School of Mechanical Engineering and Transportation, Mongolian University of Science and Technology, 34, Ulaanbaatar, Mongolia
| | - Dongjin Choi
- School of Materials Science and Engineering, Hongik University, 2639, Sejong-ro, Jochiwon-eup Sejong City, 30016, South Korea.
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33
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Choudhary S, Vashisht G, Malik R, Dong CL, Chen CL, Kandasami A, Annapoorni S. Photo generated charge transport studies of defects-induced shuttlecock-shaped ZnO/Ag hybrid nanostructures. NANOTECHNOLOGY 2021; 32:305708. [PMID: 33857921 DOI: 10.1088/1361-6528/abf87c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
We report the stimulating effects of interfacial charge transfer process between spherical Ag nanoparticles and shuttlecock-shaped ZnO nanostructures observed by UV-visible spectroscopy and x-ray absorption spectroscopy. In specific, ZnO nanorods and shuttlecock-shaped ZnO/Ag nanostructures were developed using a simple chemical colloidal method and characterized for structural variations using XRD. The observed red shift in plasmonic peak and the increase in Urbach energy signify interfacial interactions and increased randomness in the hybrid ZnO/Ag nanostructures. Simultaneously, the enhanced intensity of deep-level emission in the ZnO/Ag hybrid suggests the increased recombination rate of electron-hole pairs. The red and blue emissions evolving with temperature subsequently suggests the presence of oxygen vacancies or zinc interstitials in the system. The decrease in intensities and emerging features in O K-edge and Zn L-edge indicates the charge transfer from Ag to ZnO at the interface of ZnO/Ag hybrids. Moreover, the differences in absorption edges with alternating light on/off conditions were analyzed for the exploitation of this ZnO-based system in various applications.
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Affiliation(s)
- Siddharth Choudhary
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - Garima Vashisht
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
| | - Rakesh Malik
- ARSD College, University of Delhi, Delhi 110021, India
| | - Chung-Li Dong
- Department of Physics, Tamkang University, Tamsui 25137, Taiwan
| | - Chi-Liang Chen
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Asokan Kandasami
- Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - S Annapoorni
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India
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34
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Arndt C, Hauck M, Wacker I, Zeller-Plumhoff B, Rasch F, Taale M, Nia AS, Feng X, Adelung R, Schröder RR, Schütt F, Selhuber-Unkel C. Microengineered Hollow Graphene Tube Systems Generate Conductive Hydrogels with Extremely Low Filler Concentration. NANO LETTERS 2021; 21:3690-3697. [PMID: 33724848 PMCID: PMC8155331 DOI: 10.1021/acs.nanolett.0c04375] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 02/11/2021] [Indexed: 05/05/2023]
Abstract
The fabrication of electrically conductive hydrogels is challenging as the introduction of an electrically conductive filler often changes mechanical hydrogel matrix properties. Here, we present an approach for the preparation of hydrogel composites with outstanding electrical conductivity at extremely low filler loadings (0.34 S m-1, 0.16 vol %). Exfoliated graphene and polyacrylamide are microengineered to 3D composites such that conductive graphene pathways pervade the hydrogel matrix similar to an artificial nervous system. This makes it possible to combine both the exceptional conductivity of exfoliated graphene and the adaptable mechanical properties of polyacrylamide. The demonstrated approach is highly versatile regarding porosity, filler material, as well as hydrogel system. The important difference to other approaches is that we keep the original properties of the matrix, while ensuring conductivity through graphene-coated microchannels. This novel approach of generating conductive hydrogels is very promising, with particular applications in the fields of bioelectronics and biohybrid robotics.
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Affiliation(s)
- Christine Arndt
- Biocompatible
Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany
- Institute
for Molecular Systems Engineering (IMSE), Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Margarethe Hauck
- Functional
Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany
| | - Irene Wacker
- Cryo
Electron Microscopy, Centre for Advanced Materials (CAM), Heidelberg University, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Berit Zeller-Plumhoff
- Institute
of Metallic Biomaterials, Helmholtz-Zentrum
Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
| | - Florian Rasch
- Functional
Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany
| | - Mohammadreza Taale
- Institute
for Molecular Systems Engineering (IMSE), Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Ali Shaygan Nia
- Department
of Chemistry and Food Chemistry, Center for Advancing Electronics
Dresden (cfaed), Technische Universität
Dresden, 01062 Dresden, Germany
| | - Xinliang Feng
- Department
of Chemistry and Food Chemistry, Center for Advancing Electronics
Dresden (cfaed), Technische Universität
Dresden, 01062 Dresden, Germany
| | - Rainer Adelung
- Functional
Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany
| | - Rasmus R. Schröder
- Cryo
Electron Microscopy, Centre for Advanced Materials (CAM), Heidelberg University, Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Fabian Schütt
- Functional
Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany
| | - Christine Selhuber-Unkel
- Institute
for Molecular Systems Engineering (IMSE), Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
- Max
Planck School Matter to Life, Jahnstraße 29, 69120 Heidelberg, Germany
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35
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Abstract
The interest in advanced photocatalytic technologies with metal oxide-based nanomaterials has been growing exponentially over the years due to their green and sustainable characteristics. Photocatalysis has been employed in several applications ranging from the degradation of pollutants to water splitting, CO2 and N2 reductions, and microorganism inactivation. However, to maintain its eco-friendly aspect, new solutions must be identified to ensure sustainability. One alternative is creating an enhanced photocatalytic paper by introducing cellulose-based materials to the process. Paper can participate as a substrate for the metal oxides, but it can also form composites or membranes, and it adds a valuable contribution as it is environmentally friendly, low-cost, flexible, recyclable, lightweight, and earth abundant. In term of photocatalysts, the use of metal oxides is widely spread, mostly since these materials display enhanced photocatalytic activities, allied to their chemical stability, non-toxicity, and earth abundance, despite being inexpensive and compatible with low-cost wet-chemical synthesis routes. This manuscript extensively reviews the recent developments of using photocatalytic papers with nanostructured metal oxides for environmental remediation. It focuses on titanium dioxide (TiO2) and zinc oxide (ZnO) in the form of nanostructures or thin films. It discusses the main characteristics of metal oxides and correlates them to their photocatalytic activity. The role of cellulose-based materials on the systems’ photocatalytic performance is extensively discussed, and the future perspective for photocatalytic papers is highlighted.
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36
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Ferreira NS, Sasaki JM, Silva RS, Attah-Baah JM, Macêdo MA. Visible-Light-Responsive Photocatalytic Activity Significantly Enhanced by Active [ VZn+ VO+] Defects in Self-Assembled ZnO Nanoparticles. Inorg Chem 2021; 60:4475-4496. [PMID: 33710867 DOI: 10.1021/acs.inorgchem.0c03327] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Defect influences on the photoactivity of ZnO nanoparticles prepared by a powdered coconut water (ACP) assisted synthesis have been studied. The crystalline phase and morphology of ZnO nanoparticles were effectively controlled by adjusting the calcination temperature (400-700 °C). An induced transition of hybrid Zn5(CO3)2(OH)6/ZnO nanoparticles to single-phase ZnO nanoparticles was obtained at 480 °C. The morphological analysis revealed a formation of ZnO nanoparticles with semispherical (∼6.5 nm)- and rod-like (∼96 nm) shapes when the calcination temperatures were 400 and 700 °C, respectively. Photoluminescence characterizations revealed several defects types in the samples with VZn and VO+ being in the self-assembly of semispherical- and rod-like ZnO nanoparticles. The photocatalytic activity of the ZnO nanoparticles was examined by assessing the degradation of methylene blue in an aqueous solution under low-intensity visible-light irradiation (∼3 W m-2). The results point toward the self-assembly of semispherical- and rod-like ZnO nanoparticles that had significantly better photocatalytic activity (∼31%) in comparison to that of spherical-agglomerated- or near-spherical-like species within 120 min of irradiation. The possible photocatalytic mechanism is discussed in detail, and the morphology-driven intrinsic [VZn+VO+] defects are proposed to be among the active sites of the ZnO nanoparticles enhancing the photocatalytic activity.
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Affiliation(s)
- Nilson S Ferreira
- Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil.,Laboratório de Corrosão e Nanotecnologia (LCNT), Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil
| | - José M Sasaki
- Departamento de Física, Universidade Federal do Ceará, 60455-760 Fortaleza, Ceará, Brazil
| | - Romualdo S Silva
- Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil.,Laboratório de Corrosão e Nanotecnologia (LCNT), Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil
| | - John M Attah-Baah
- Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil.,Laboratório de Corrosão e Nanotecnologia (LCNT), Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil
| | - Marcelo A Macêdo
- Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil.,Laboratório de Corrosão e Nanotecnologia (LCNT), Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil
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Kumar S, Kaushik R, Purohit L. Novel ZnO tetrapod-reduced graphene oxide nanocomposites for enhanced photocatalytic degradation of phenolic compounds and MB dye. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114814] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Huang X, Lai M, Zhao Z, Yang Y, Li J, Song H, He J, Ma Y, Liu B. Fiber optic evanescent wave humidity sensor based on SiO 2/TiO 2 bilayer films. APPLIED OPTICS 2021; 60:2158-2165. [PMID: 33690310 DOI: 10.1364/ao.416286] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/09/2021] [Indexed: 06/12/2023]
Abstract
A SiO2/TiO2 bilayer thin-film-based fiber optic humidity sensor was fabricated via a modified dip coating process with enhanced sensitivity. SiO2 film was coated on the surface of the fiber core, followed by deposition of the TiO2 layer on SiO2. The relative humidity (RH) is measured by modulation in intensity of the transmitted laser at room temperature. The optical fiber humidity sensor based on SiO2/TiO2 film shows two-segmented linearity in measurement with sensitivities of 5.35 and 1.94 µW/% RH at 15%-50% RH and 50%-95% RH, respectively. The response time and recovery time are 25 s and 50 s, respectively. To our knowledge, the superior response time and recovery time of the sensor in our study were achieved over those fiber optic humidity sensors reported with modulation in intensity. Furthermore, this fiber optic humidity sensor has a good reproducibility and long-term stability. The sensing mechanism is attributed to effects of moisture on the refractive index and the light absorption coefficient of SiO2 film and modulation in the transmission characteristic of evanescent waves in the optical fiber.
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Ezhilmaran B, Dhanasekar M, Bhat SV. Solution processed transparent anatase TiO 2 nanoparticles/MoO 3 nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications. NANOSCALE ADVANCES 2021; 3:1047-1056. [PMID: 36133282 PMCID: PMC9419760 DOI: 10.1039/d0na00780c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 12/17/2020] [Indexed: 05/04/2023]
Abstract
Ultraviolet (UV) photodetectors are considered as the major players in energy saving technology of the future. Efforts are needed to further develop such devices, which are capable of operating efficiently at low driving potential as well as with weak illumination. Herein, we report an all-oxide, highly transparent TiO2/MoO3 bilayer film, with nanoparticulate anatase TiO2 as the platform, fabricated by a simple solution based method and demonstrate its use in UV photodetection. Photoconductivity measurement with 352 nm light reveals the self-powered UV detection capability of the device due to the built-in potential at the bilayer interface. The device exhibits a high photoresponsivity (46.05 A W-1), detectivity (2.84 × 1012 Jones) and EQE (16 223%) even with a weak illumination of 76 μW cm-2, at a low bias of only -1 V. The self-powered performance of the bilayer device is comparable to that of commercial Si photodetectors as well as other such UV detectors reported based on metal oxide heterojunctions. The improved and faster photoresponse shown by the device is due to the formation of an effective heterojunction, as evidenced by XPS, electrochemical and I-V studies. It can be further attributed to the better charge transport through the densely aligned nanostructures, reduced recombination and the better mobility of anatase TiO2 nanoparticles. The performance is best-in-class and proves the potential of the transparent heterojunction to be used in highly responsive, self-powered UV detectors for low bias, low light applications.
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Affiliation(s)
- Bhuvaneshwari Ezhilmaran
- SRM Research Institute, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
| | - M Dhanasekar
- SRM Research Institute, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
| | - S Venkataprasad Bhat
- SRM Research Institute, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology Kattankulathur Kancheepuram-603203 India
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Development of Polythiourethane/ZnO-Based Anti-Fouling Materials and Evaluation of the Adhesion of Staphylococcus aureus and Candida glabrata Using Single-Cell Force Spectroscopy. NANOMATERIALS 2021; 11:nano11020271. [PMID: 33494168 PMCID: PMC7909824 DOI: 10.3390/nano11020271] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/08/2021] [Accepted: 01/13/2021] [Indexed: 11/16/2022]
Abstract
The attachment of bacteria and other microbes to natural and artificial surfaces leads to the development of biofilms, which can further cause nosocomial infections. Thus, an important field of research is the development of new materials capable of preventing the initial adhesion of pathogenic microorganisms. In this work, novel polymer/particle composite materials, based on a polythiourethane (PTU) matrix and either spherical (s-ZnO) or tetrapodal (t-ZnO) shaped ZnO fillers, were developed and characterized with respect to their mechanical, chemical and surface properties. To then evaluate their potential as anti-fouling surfaces, the adhesion of two different pathogenic microorganism species, Staphylococcus aureus and Candida glabrata, was studied using atomic force microscopy (AFM). Our results show that the adhesion of both S. aureus and C. glabrata to PTU and PTU/ZnO is decreased compared to a model surface polydimethylsiloxane (PDMS). It was furthermore found that the amount of both s-ZnO and t-ZnO filler had a direct influence on the adhesion of S. aureus, as increasing amounts of ZnO particles resulted in reduced adhesion of the cells. For both microorganisms, material composites with 5 wt.% of t-ZnO particles showed the greatest potential for anti-fouling with significantly decreased adhesion of cells. Altogether, both pathogens exhibit a reduced capacity to adhere to the newly developed nanomaterials used in this study, thus showing their potential for bio-medical applications.
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Jin SE, Jin HE. Antimicrobial Activity of Zinc Oxide Nano/Microparticles and Their Combinations against Pathogenic Microorganisms for Biomedical Applications: From Physicochemical Characteristics to Pharmacological Aspects. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:263. [PMID: 33498491 PMCID: PMC7922830 DOI: 10.3390/nano11020263] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/15/2021] [Accepted: 01/17/2021] [Indexed: 12/31/2022]
Abstract
Zinc oxide (ZnO) nano/microparticles (NPs/MPs) have been studied as antibiotics to enhance antimicrobial activity against pathogenic bacteria and viruses with or without antibiotic resistance. They have unique physicochemical characteristics that can affect biological and toxicological responses in microorganisms. Metal ion release, particle adsorption, and reactive oxygen species generation are the main mechanisms underlying their antimicrobial action. In this review, we describe the physicochemical characteristics of ZnO NPs/MPs related to biological and toxicological effects and discuss the recent findings of the antimicrobial activity of ZnO NPs/MPs and their combinations with other materials against pathogenic microorganisms. Current biomedical applications of ZnO NPs/MPs and combinations with other materials are also presented. This review will provide the better understanding of ZnO NPs/MPs as antibiotic alternatives and aid in further development of antibiotic agents for industrial and clinical applications.
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Affiliation(s)
- Su-Eon Jin
- Research Institute for Medical Sciences, College of Medicine, Inha University, Incheon 22212, Korea
| | - Hyo-Eon Jin
- College of Pharmacy, Ajou University, Suwon 16499, Korea
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Schmitt C, Rasch F, Cossais F, Held-Feindt J, Lucius R, Vázquez AR, Nia AS, Lohe MR, Feng X, Mishra YK, Adelung R, Schütt F, Hattermann K. Glial cell responses on tetrapod-shaped graphene oxide and reduced graphene oxide 3D scaffolds in brain in vitro and ex vivo models of indirect contact. Biomed Mater 2020; 16:015008. [DOI: 10.1088/1748-605x/aba796] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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43
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Zhou M, Wu B, Zhang X, Cao S, Ma P, Wang K, Fan Z, Su M. Preparation and UV Photoelectric Properties of Aligned ZnO-TiO 2 and TiO 2-ZnO Core-Shell Structured Heterojunction Nanotubes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:38490-38498. [PMID: 32846492 DOI: 10.1021/acsami.0c03550] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Large-area horizontal-aligned ZnO nanotubes (ZNTs), TiO2 nanotubes (TNTs), TiO2-ZnO core-shell nanotubes (TZNTs) and ZnO-TiO2 core-shell nanotubes (ZTNTs) were successfully synthesized by electrospinning combined with pulsed-laser deposition. The morphology, structure, and composition of the samples were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, and Raman spectroscopy. The photoluminescence (PL) spectra of these samples indicate that the addition of a TiO2 layer greatly decreases the recombination of photogenerated carriers in the heterojunction nanotubes. The photodetectors (PDs) were fabricated by assembling horizontally ordered nanotubes on the gold interdigital electrode, and their ultraviolet (UV) detection performances were compared. The test results at room temperature show that the PD with aligned ZTNTs have the best UV response and a short response recovery time. In addition, the performance of ZTNT PDs and TZNT PDs are further improved under heating. The photo/dark current ratio, responsivity (Rλ), detectivity (D*), and external quantum efficiency (EQE) of ZTNTs increased to 388, 450 uA·W-1, 1.1 × 1010 cm·Hz1/2·W-1, and 0.15%, respectively, under the condition of 365 nm UV radiation with a power density of 4.9 mW·cm-2 and a 1 V bias at 90 °C. The UV response mechanism and structural superiority of the horizontally ordered coaxial heteronanotube were also discussed. In addition, this work provides an important method for the design of other ordered nanomaterials and structures, which have a wide range of applications in the fields of sensors, transistors, transparent flexible electrodes, and other multifunctional devices.
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Affiliation(s)
- Ming Zhou
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Bozhi Wu
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Xueting Zhang
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Shiquan Cao
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Pengpeng Ma
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Kaiping Wang
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Zhengpeng Fan
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Maogen Su
- Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China
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Zhao H, Ouyang B, Han L, Mishra YK, Zhang Z, Yang Y. Conjuncted photo-thermoelectric effect in ZnO-graphene nanocomposite foam for self-powered simultaneous temperature and light sensing. Sci Rep 2020; 10:11864. [PMID: 32681111 PMCID: PMC7368035 DOI: 10.1038/s41598-020-68790-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 06/22/2020] [Indexed: 11/29/2022] Open
Abstract
The self-powered sensors are more and more important in current society. However, detecting both light and temperature signals simultaneously without energy waste and signal interference is still a challenge. Here, we report a ZnO/graphene nanocomposite foam-based self-powered sensor, which can realize the simultaneous detection of light and temperature by using the conjuncted photo-thermoelectric effect in ZnO-graphene nanocomposite foam sensor. The output current under light, heating and cooling of the device with the best ZnO/graphene ratio (8:1) for the foam can reach 1.75 µA, 1.02 µA and 0.70 µA, respectively, which are approximately three fold higher than them of devices with other ZnO/graphene ratios. The ZnO-graphene nanocomposite foam device also possesses excellent thermoelectric and photoelectric performances for conjuncted lighting and heating detection without mutual interference. The ZnO-graphene nanocomposite foam device exhibits a new designation on the road towards the fabrication of low cost and one-circuit-based multifunction sensors and systems.
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Affiliation(s)
- Huiqi Zhao
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Bangsen Ouyang
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Lu Han
- School of Materials and Metallurgy, University of Science and Technology Liaoning, 185 Qianshan Zhong Road, Anshan, 114051, People's Republic of China.
| | - Yogendra Kumar Mishra
- Mads Clausen Institute, NanoSYD, University of Southern Denmark, Alsion 2, 6400, Sønderborg, Denmark
| | - Zhiqiang Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, 185 Qianshan Zhong Road, Anshan, 114051, People's Republic of China
| | - Ya Yang
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, People's Republic of China.
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
- Center On Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, Guangxi, People's Republic of China.
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Rodrigues J, Hoppe M, Ben Sedrine N, Wolff N, Duppel V, Kienle L, Adelung R, Mishra YK, Correia MR, Monteiro T. ZnAl 2O 4 decorated Al-doped ZnO tetrapodal 3D networks: microstructure, Raman and detailed temperature dependent photoluminescence analysis. NANOSCALE ADVANCES 2020; 2:2114-2126. [PMID: 36132514 PMCID: PMC9417638 DOI: 10.1039/c9na00730j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 03/18/2020] [Indexed: 06/15/2023]
Abstract
3D networks of Al-doped ZnO tetrapods decorated with ZnAl2O4 particles synthesised by the flame transport method were investigated in detail using optical techniques combined with morphological/structural characterisation. Low temperature photoluminescence (PL) measurements revealed spectra dominated by near band edge (NBE) recombination in the UV region, together with broad visible bands whose peak positions shift depending on the ZnO : Al mixing ratios. A close inspection of the NBE region evidences the effective doping of the ZnO structures with Al, as corroborated by the broadening and shift of its peak position towards the expected energy associated with the exciton bound to Al. Both temperature and excitation density-dependent PL results pointed to an overlap of multiple optical centres contributing to the broad visible band, with the peak position dependent on the Al content. While in the reference sample the wavelength of the green band remained unchanged with temperature, in the case of the composites, the deep level emission showed a blue shift with increasing temperature, likely due to distinct thermal quenching of the overlapping emitting centres. This assumption was further validated by the time-resolved PL data, which clearly exposed the presence of more than one optical centre in this spectral region. PL excitation analysis demonstrated that the luminescence features of the Al-doped ZnO/ZnAl2O4 composites revealed noticeable changes not only in deep level recombination, but also in the material's bandgap when compared with the ZnO reference sample. At room temperature, the ZnO reference sample exhibited free exciton resonance at ∼3.29 eV, whereas the peak position for the Al-doped ZnO/ZnAl2O4 samples occurred at ∼3.38 eV due to the Burstein-Moss shift, commonly observed in heavily doped semiconductors. Considering the energy shift observed and assuming a parabolic conduction band, a carrier concentration of ∼1.82 ×1019 cm-3 was estimated for the Al-doped ZnO/ZnAl2O4 samples.
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Affiliation(s)
- Joana Rodrigues
- i3N & Physics Department, Universidade de Aveiro 3810-193 Aveiro Portugal
| | - Matthias Hoppe
- Functional Nanomaterials, Institute for Materials Science, Kiel University Kaiserstr. 2 D-24143, Kiel Germany
| | - Nabiha Ben Sedrine
- i3N & Physics Department, Universidade de Aveiro 3810-193 Aveiro Portugal
| | - Niklas Wolff
- Synthesis and Real Structure, Institute for Materials Science, Kiel University Kaiserstr. 2 D-24143, Kiel Germany
| | - Viola Duppel
- Max Planck Institute for Solid State Research Heisenbergstr. 1 D-70569 Stuttgart Germany
| | - Lorenz Kienle
- Synthesis and Real Structure, Institute for Materials Science, Kiel University Kaiserstr. 2 D-24143, Kiel Germany
| | - Rainer Adelung
- Functional Nanomaterials, Institute for Materials Science, Kiel University Kaiserstr. 2 D-24143, Kiel Germany
| | - Yogendra K Mishra
- Mads Clausen Institute, NanoSYD, University of Southern Denmark Alsion 2 6400 Sønderborg Denmark
| | - Maria R Correia
- i3N & Physics Department, Universidade de Aveiro 3810-193 Aveiro Portugal
| | - Teresa Monteiro
- i3N & Physics Department, Universidade de Aveiro 3810-193 Aveiro Portugal
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Rasch F, Schmitt C, Saure LM, Meyer R, Adamski V, Dengiz D, Scherließ R, Lucius R, Synowitz M, Mishra YK, Hattermann K, Adelung R, Held-Feindt J, Schütt F. Macroscopic Silicone Microchannel Matrix for Tailored Drug Release and Localized Glioblastoma Therapy. ACS Biomater Sci Eng 2020; 6:3388-3397. [DOI: 10.1021/acsbiomaterials.0c00094] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Florian Rasch
- Chair for Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Christina Schmitt
- Department of Anatomy, Kiel University, Otto-Hahn-Platz 8, 24118 Kiel, Germany
| | - Lena M. Saure
- Chair for Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Rieke Meyer
- Department of Neurosurgery, University Medical Center Schleswig-Holstein UKSH, Campus Kiel, Arnold-Heller-Str. 3, House D, 24105 Kiel, Germany
| | - Vivian Adamski
- Department of Neurosurgery, University Medical Center Schleswig-Holstein UKSH, Campus Kiel, Arnold-Heller-Str. 3, House D, 24105 Kiel, Germany
| | - Duygu Dengiz
- Chair for Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Regina Scherließ
- Department of Pharmaceutics and Biopharmaceutics, Kiel University, Grasweg 9a, 24118 Kiel, Germany
| | - Ralph Lucius
- Department of Anatomy, Kiel University, Otto-Hahn-Platz 8, 24118 Kiel, Germany
| | - Michael Synowitz
- Department of Neurosurgery, University Medical Center Schleswig-Holstein UKSH, Campus Kiel, Arnold-Heller-Str. 3, House D, 24105 Kiel, Germany
| | - Yogendra K. Mishra
- Mads Clausen Institute, NanoSYD, University of Southern Denmark, Alsion 2, 6400 Sønderborg, Denmark
| | - Kirsten Hattermann
- Department of Anatomy, Kiel University, Otto-Hahn-Platz 8, 24118 Kiel, Germany
| | - Rainer Adelung
- Chair for Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
| | - Janka Held-Feindt
- Department of Neurosurgery, University Medical Center Schleswig-Holstein UKSH, Campus Kiel, Arnold-Heller-Str. 3, House D, 24105 Kiel, Germany
| | - Fabian Schütt
- Chair for Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiser Str. 2, 24143 Kiel, Germany
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Schütt F, Zapf M, Signetti S, Strobel J, Krüger H, Röder R, Carstensen J, Wolff N, Marx J, Carey T, Schweichel M, Terasa MI, Siebert L, Hong HK, Kaps S, Fiedler B, Mishra YK, Lee Z, Pugno NM, Kienle L, Ferrari AC, Torrisi F, Ronning C, Adelung R. Conversionless efficient and broadband laser light diffusers for high brightness illumination applications. Nat Commun 2020; 11:1437. [PMID: 32188852 PMCID: PMC7080714 DOI: 10.1038/s41467-020-14875-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 02/03/2020] [Indexed: 11/15/2022] Open
Abstract
Laser diodes are efficient light sources. However, state-of-the-art laser diode-based lighting systems rely on light-converting inorganic phosphor materials, which strongly limit the efficiency and lifetime, as well as achievable light output due to energy losses, saturation, thermal degradation, and low irradiance levels. Here, we demonstrate a macroscopically expanded, three-dimensional diffuser composed of interconnected hollow hexagonal boron nitride microtubes with nanoscopic wall-thickness, acting as an artificial solid fog, capable of withstanding ~10 times the irradiance level of remote phosphors. In contrast to phosphors, no light conversion is required as the diffuser relies solely on strong broadband (full visible range) lossless multiple light scattering events, enabled by a highly porous (>99.99%) non-absorbing nanoarchitecture, resulting in efficiencies of ~98%. This can unleash the potential of lasers for high-brightness lighting applications, such as automotive headlights, projection technology or lighting for large spaces.
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Affiliation(s)
- Fabian Schütt
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany.
| | - Maximilian Zapf
- Institute for Solid State Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743, Jena, Germany
| | - Stefano Signetti
- Laboratory of Bio-inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, I-38123, Trento, Italy
| | - Julian Strobel
- Synthesis and Real Structure, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Helge Krüger
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Robert Röder
- Institute for Solid State Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743, Jena, Germany
| | - Jürgen Carstensen
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Niklas Wolff
- Synthesis and Real Structure, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Janik Marx
- Institute of Polymers and Composites, Hamburg University of Technology, Denickestr. 15, 21073, Hamburg, Germany
| | - Tian Carey
- Cambridge Graphene Centre, University of Cambridge, 9, JJ Thomson Avenue, Cambridge, CB3 0FA, UK
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, Wood Lane, London, W12 0BZ, UK
| | - Marleen Schweichel
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Maik-Ivo Terasa
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Leonard Siebert
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Hyo-Ki Hong
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Sören Kaps
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Bodo Fiedler
- Institute of Polymers and Composites, Hamburg University of Technology, Denickestr. 15, 21073, Hamburg, Germany
| | - Yogendra Kumar Mishra
- SDU NanoSYD, Mads Clausen Institute, University of Southern Denmark, Alsion 2, 6400, Sønderborg, Denmark
| | - Zonghoon Lee
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Nicola M Pugno
- Laboratory of Bio-inspired, Bionic, Nano, Meta Materials & Mechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, I-38123, Trento, Italy
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road E1 4NS, London, UK
- Ket-Lab, Edoardo Amaldi Foundation, via del Politecnico snc, I-00133, Roma, Italy
| | - Lorenz Kienle
- Synthesis and Real Structure, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany
| | - Andrea C Ferrari
- Cambridge Graphene Centre, University of Cambridge, 9, JJ Thomson Avenue, Cambridge, CB3 0FA, UK
| | - Felice Torrisi
- Cambridge Graphene Centre, University of Cambridge, 9, JJ Thomson Avenue, Cambridge, CB3 0FA, UK
- Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, Wood Lane, London, W12 0BZ, UK
| | - Carsten Ronning
- Institute for Solid State Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743, Jena, Germany
| | - Rainer Adelung
- Functional Nanomaterials, Institute for Materials Science, Kiel University, Kaiserstr. 2, 24143, Kiel, Germany.
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48
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Antony A, P P, Kityk IV, Ozga K, Jedryka J, Myronchuk G, Kulkarni SD, Sanjeev G, Petwal VC, Verma VP, Dwivedi J. Defect engineering, microstructural examination and improvement of ultrafast third harmonic generation in GaZnO nanostructures: a study of e-beam irradiation. Phys Chem Chem Phys 2020; 22:4252-4265. [PMID: 32044896 DOI: 10.1039/c9cp06323d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Electron beam induced effects on defect engineering and structural, morphological and optical properties of Ga doped ZnO (GaZnO) nanostructures for improved ultrafast nonlinear optical properties are presented. A microstructural analysis was carried out based on the Scherrer, Williamson-Hall, and size-strain models. All three models reveal a peak broadening effect upon electron beam irradiation (EBI) and the crystallite size of the films shows a decrease of 30% compared to unirradiated nanostructures. The decrease in intensity, variation in the peak position and broadening of the Raman E2H mode confirm that the EBI treatment introduces disorder into the nanostructures. The interband gap emissions observed in photoluminescence spectra are primarily due to defect-related emissions originating from intrinsic defects such as Zni, Oi, VZn, VO, VZn+, VO+ and OZn. The O1s core-level spectra show that the peak related to oxygen vacancy defects is suppressed upon EBI. Surface morphology studies reveal that the nucleation barriers of GaZnO nanostructures are reduced upon irradiation treatment resulting in a coalescence mechanism. Third harmonic generation studies show that higher electron-beam doses lead to the occurrence of enhanced THG signals due to a drastic change in the occupation of localized defect levels. Thermally induced nonlinear optical studies depict an improved χ(3) of 1.71 × 10-3 esu upon irradiation due to enhanced FCA induced TPA mechanism and non-radiative transitions which indicates the credibility of the grown films in photonic devices.
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Affiliation(s)
- Albin Antony
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
| | - Poornesh P
- Department of Physics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India.
| | - I V Kityk
- Chair of Automatic, Electrotechnical and Optoelectronics, Faculty of Electrical Engineering, Czestochowa University of Technology, Armii Krajowej 17, PL-42-201 Czestochowa, Poland
| | - K Ozga
- Chair of Automatic, Electrotechnical and Optoelectronics, Faculty of Electrical Engineering, Czestochowa University of Technology, Armii Krajowej 17, PL-42-201 Czestochowa, Poland
| | - J Jedryka
- Chair of Automatic, Electrotechnical and Optoelectronics, Faculty of Electrical Engineering, Czestochowa University of Technology, Armii Krajowej 17, PL-42-201 Czestochowa, Poland
| | - G Myronchuk
- Solid State Physics Department, Eastern European University, Voli 6, Luck, Ukraine
| | - Suresh D Kulkarni
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Ganesh Sanjeev
- Department of Physics, Mangalore University, Mangalore, Karnataka 574199, India
| | - Vikash Chandra Petwal
- Industrial Accelerator Section, PSIAD, Raja Ramanna Centre for Advanced Technology, Indore, 452012, M.P., India
| | - Vijay Pal Verma
- Industrial Accelerator Section, PSIAD, Raja Ramanna Centre for Advanced Technology, Indore, 452012, M.P., India
| | - Jishnu Dwivedi
- Industrial Accelerator Section, PSIAD, Raja Ramanna Centre for Advanced Technology, Indore, 452012, M.P., India
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Thermally induced structural metamorphosis of ZnO:Rb nanostructures for antibacterial impacts. Colloids Surf B Biointerfaces 2020; 188:110821. [PMID: 31999966 DOI: 10.1016/j.colsurfb.2020.110821] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 12/22/2019] [Accepted: 01/21/2020] [Indexed: 11/24/2022]
Abstract
In this work, we report on the synthesis of pure and Rb doped ZnO (ZnO:Rb) nanoparticles by a simple combustion technique followed by thermal treatment in an open-air atmosphere. The prepared samples were characterized using UV-vis spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), photoluminescence, Raman spectroscopy and scanning electron microscopy. The wurtzite hexagonal phase structure of ZnO and a secondary phase of Rb2ZnO2 was observed after doping ZnO with Rb. FTIR and DSC confirmed the functional groups and the thermal stability of the ZnO samples. Field emission scanning electron microscope showed an irregular shaped agglomerated morphology for the ZnO:Rb samples. The chemical states of the undoped and Rb doped samples were identified using X-ray photoelectron spectroscopy for both pure and ZnO:Rb samples. In addition, ZnO:Rb samples exhibit good antimicrobial activities against Bacillus subtilis with a change in antibacterial behaviour as compared to pure ZnO structures indicating their multifunctional applications.
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50
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Dhanalakshmi M, Saravanakumar K, Prabavathi SL, Muthuraj V. Iridium doped ZnO nanocomposites: Synergistic effect induced photocatalytic degradation of methylene blue and crystal violet. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2019.107601] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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