1
|
Klos MAH, González-García L, Kraus T. Mechanically Robust, Inkjet-Printable Polymer Nanocomposites with Hybrid Gold Nanoparticles and Metal-like Conductivity. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38859578 DOI: 10.1021/acsami.4c04692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Hybrid core-shell nanoparticles with metal cores and conductive polymer shells yield materials that are sinter-free and highly conductive but mechanically weak. Conventional composites of such nanoparticles are electrically insulating. Here, we introduce microscale phase-separated nanocomposites of hybrid gold-PEDOT:PPS particles in insulating poly(vinyl alcohol) (PVA). They combine electrical conductivities of up to 2.1 × 105 S/m at 10 vol % PVA with increased mechanical adhesion on polyethylene terephthalate and glass substrates. We studied the effects of the PVA molecular weight, hydrolyzation degree, and volume fraction. Composites with 10 vol % highly hydrolyzed PVA at a MW of 89-98 kDa had the highest conductivities and stabilities; highly hydrolyzed PVA even increased the conductivity of the hybrid particle layers. We propose the formation of hydrogen bonds between PVA and PEDOT:PSS that lead to demixing and the formation of stable, structured composites. Finally, we demonstrated the inkjet-printability of inks containing PVA in water with viscosities of 1.6-2.0 Pa s at 50.1 s-1 and prepared bending-resistant electrical leads.
Collapse
Affiliation(s)
- Michael A H Klos
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Saarland University, Colloid and Interface Chemistry, Campus D2 2, 66123 Saarbrücken, Germany
| | - Lola González-García
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Saarland University, Department of Materials Science and Engineering, Campus D2 2, 66123 Saarbrücken, Germany
| | - Tobias Kraus
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Saarland University, Colloid and Interface Chemistry, Campus D2 2, 66123 Saarbrücken, Germany
| |
Collapse
|
2
|
Liu WC, Prentice JCA, Patrick CE, Watt AAR. Enhancing Conductivity of Silver Nanowire Networks through Surface Engineering Using Bidentate Rigid Ligands. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4150-4159. [PMID: 38197866 PMCID: PMC10811619 DOI: 10.1021/acsami.3c15207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/11/2024]
Abstract
Solution processable metallic nanomaterials present a convenient way to fabricate conductive structures, which are necessary in all electronic devices. However, they tend to require post-treatments to remove the bulky ligands around them to achieve high conductivity. In this work, we present a method to formulate a post-treatment free conductive silver nanowire ink by controlling the type of ligands around the silver nanowires. We found that bidentate ligands with a rigid molecular structure were effective in improving the conductivity of the silver nanowire networks as they could maximize the number of linkages between neighboring nanowires. In addition, DFT calculations also revealed that ligands with good LUMO to silver energy alignment were more effective. Because of these reasons, fumaric acid was found to be the most effective ligand and achieved a large reduction in sheet resistance of 70% or higher depending on the nanowire network density. The concepts elucidated from this study would also be applicable to other solution processable nanomaterials systems such as quantum dots for photovoltaics or LEDs which also require good charge transport being neighboring nanoparticles.
Collapse
Affiliation(s)
- Wing Chung Liu
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United
Kingdom
| | - Joseph C. A. Prentice
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United
Kingdom
| | - Christopher E. Patrick
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United
Kingdom
| | - Andrew A. R. Watt
- Department of Materials, University of Oxford, 16 Parks Road, Oxford OX1 3PH, United
Kingdom
| |
Collapse
|
3
|
Engel LF, González-García L, Kraus T. Consolidation and performance gains in plasma-sintered printed nanoelectrodes. NANOSCALE ADVANCES 2023; 5:4124-4132. [PMID: 37560420 PMCID: PMC10408613 DOI: 10.1039/d3na00293d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/02/2023] [Indexed: 08/11/2023]
Abstract
We report on the unusual, advantageous ageing of flexible transparent electrodes (FTEs) that were self-assembled from oleylamine-capped gold nanospheres (AuNPs) by direct nanoimprinting of inks with different particle concentrations (cAu = 3 mg mL-1 to 30 mg mL-1). The resulting lines were less than 2.5 μm wide and consisted of disordered particle assemblies. Small-Angle X-ray Scattering confirmed that particle packing did not change with ink concentration. Plasma sintering converted the printed structures into lines with a thin, electrically conductive metal shell and a less conductive hybrid core. We studied the opto-electronic performance directly after plasma sintering and after fourteen days of storage at 22 °C and 55% rH in the dark. The mean optical transmittance T̄400-800 in the range from 400 nm to 800 nm increased by up to ≈ 3%, while the sheet resistance Rsh strongly decreased by up to ≈ 82% at all concentrations. We correlated the changes with morphological changes visible in scanning and transmission electron microscopy and identified two sequential ageing stages: (I) post-plasma relaxation effects in and consolidation of the shell, and (II) particle re-organization, de-mixing, coarsening, and densification of the core with plating of Au from the core onto the shell, followed by solid-state de-wetting (ink concentrations cAu < 15 mg mL-1) or stability (cAu ≥ 15 mg mL-1). The plating of Au from the hybrid core improved the FTEs' Figure of Merit FOM = T̄400-800·Rsh-1 by up to ≈ 5.8 times and explains the stable value of ≈ 3.3%·Ωsq-1 reached after 7 days of ageing at cAu = 30 mg mL-1.
Collapse
Affiliation(s)
- Lukas F Engel
- INM - Leibniz Institute for New Materials, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
| | - Lola González-García
- INM - Leibniz Institute for New Materials, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
- Department of Materials Science and Engineering, Saarland University, Campus D2 2 66123 Saarbrücken Germany
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-269
- Colloid and Interface Chemistry, Saarland University, Campus D2 2 66123 Saarbrücken Germany +49 (0)681-9300-389
| |
Collapse
|
4
|
Hoffmann M, Schedel CA, Mayer M, Rossner C, Scheele M, Fery A. Heading toward Miniature Sensors: Electrical Conductance of Linearly Assembled Gold Nanorods. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13091466. [PMID: 37177011 PMCID: PMC10179793 DOI: 10.3390/nano13091466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/17/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023]
Abstract
Metal nanoparticles are increasingly used as key elements in the fabrication and processing of advanced electronic systems and devices. For future device integration, their charge transport properties are essential. This has been exploited, e.g., in the development of gold-nanoparticle-based conductive inks and chemiresistive sensors. Colloidal wires and metal nanoparticle lines can also be used as interconnection structures to build directional electrical circuits, e.g., for signal transduction. Our scalable bottom-up, template-assisted self-assembly creates gold-nanorod (AuNR) lines that feature comparably small widths, as well as good conductivity. However, the bottom-up approach poses the question about the consistency of charge transport properties between individual lines, as this approach leads to heterogeneities among those lines with regard to AuNR orientation, as well as line defects. Therefore, we test the conductance of the AuNR lines and identify requirements for a reliable performance. We reveal that multiple parallel AuNR lines (>11) are necessary to achieve predictable conductivity properties, defining the level of miniaturization possible in such a setup. With this system, even an active area of only 16 µm2 shows a higher conductance (~10-5 S) than a monolayer of gold nanospheres with dithiolated-conjugated ligands and additionally features the advantage of anisotropic conductance.
Collapse
Affiliation(s)
- Marisa Hoffmann
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
- Physical Chemistry of Polymeric Materials, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany
- Center for Advancing Electronics Dresden, Technische Universität Dresden, Helmholtzstr. 18, 01069 Dresden, Germany
| | - Christine Alexandra Schedel
- Institute of Physical and Theoretical Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Martin Mayer
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
| | - Christian Rossner
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
- Dresden Center for Intelligent Materials (DCIM), Technische Universität Dresden, 01069 Dresden, Germany
| | - Marcus Scheele
- Institute of Physical and Theoretical Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, Hohe Str. 6, 01069 Dresden, Germany
- Physical Chemistry of Polymeric Materials, Technische Universität Dresden, Bergstr. 66, 01069 Dresden, Germany
- Center for Advancing Electronics Dresden, Technische Universität Dresden, Helmholtzstr. 18, 01069 Dresden, Germany
| |
Collapse
|
5
|
Plasmonic stimulation of gold nanorods for the photothermal control of engineered living materials. BIOMATERIALS ADVANCES 2023; 147:213332. [PMID: 36801796 DOI: 10.1016/j.bioadv.2023.213332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/16/2023]
Abstract
Engineered living materials (ELMs) encapsulate microorganisms within polymeric matrices for biosensing, drug delivery, capturing viruses, and bioremediation. It is often desirable to control their function remotely and in real time and so the microorganisms are often genetically engineered to respond to external stimuli. Here, we combine thermogenetically engineered microorganisms with inorganic nanostructures to sensitize an ELM to near infrared light. For this, we use plasmonic gold nanorods (AuNR) that have a strong absorption maximum at 808 nm, a wavelength where human tissue is relatively transparent. These are combined with Pluronic-based hydrogel to generate a nanocomposite gel that can convert incident near infrared light into heat locally. We perform transient temperature measurements and find a photothermal conversion efficiency of 47 %. Steady-state temperature profiles from local photothermal heating are quantified using infrared photothermal imaging and correlated with measurements inside the gel to reconstruct spatial temperature profiles. Bilayer geometries are used to combine AuNR and bacteria-containing gel layers to mimic core-shell ELMs. The thermoplasmonic heating of an AuNR-containing hydrogel layer that is exposed to infrared light diffuses to the separate but connected hydrogel layer with bacteria and stimulates them to produce a fluorescent protein. By tuning the intensity of the incident light, it is possible to activate either the entire bacterial population or only a localized region.
Collapse
|
6
|
Słoma M. 3D printed electronics with nanomaterials. NANOSCALE 2023; 15:5623-5648. [PMID: 36880539 DOI: 10.1039/d2nr06771d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A large variety of printing, deposition and writing techniques have been incorporated to fabricate electronic devices in the last decades. This approach, printed electronics, has gained great interest in research and practical applications and is successfully fuelling the growth in materials science and technology. On the other hand, a new player is emerging, additive manufacturing, called 3D printing, introducing a new capability to create geometrically complex constructs with low cost and minimal material waste. Having such tremendous technology in our hands, it was just a matter of time to combine advances of printed electronics technology for the fabrication of unique 3D structural electronics. Nanomaterial patterning with additive manufacturing techniques can enable harnessing their nanoscale properties and the fabrication of active structures with unique electrical, mechanical, optical, thermal, magnetic and biological properties. In this paper, we will briefly review the properties of selected nanomaterials suitable for electronic applications and look closer at the current achievements in the synergistic integration of nanomaterials with additive manufacturing technologies to fabricate 3D printed structural electronics. The focus is fixed strictly on techniques allowing as much as possible fabrication of spatial 3D objects, or at least conformal ones on 3D printed substrates, while only selected techniques are adaptable for 3D printing of electronics. Advances in the fabrication of conductive paths and circuits, passive components, antennas, active and photonic components, energy devices, microelectromechanical systems and sensors are presented. Finally, perspectives for development with new nanomaterials, multimaterial and hybrid techniques, bioelectronics, integration with discrete components and 4D-printing are briefly discussed.
Collapse
Affiliation(s)
- Marcin Słoma
- Micro- and Nanotechnology Division, Institute of Metrology and Biomedical Engineering, Faculty of Mechatronics, Warsaw University of Technology, 8 Sw. A Boboli St., 02-525 Warsaw, Poland.
| |
Collapse
|
7
|
Silvestre R, Llinares Llopis R, Contat Rodrigo L, Serrano Martínez V, Ferri J, Garcia-Breijo E. Low-Temperature Soldering of Surface Mount Devices on Screen-Printed Silver Tracks on Fabrics for Flexible Textile Hybrid Electronics. SENSORS (BASEL, SWITZERLAND) 2022; 22:5766. [PMID: 35957322 PMCID: PMC9370845 DOI: 10.3390/s22155766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/29/2022] [Accepted: 07/30/2022] [Indexed: 06/15/2023]
Abstract
The combination of flexible-printed substrates and conventional electronics leads to flexible hybrid electronics. When fabrics are used as flexible substrates, two kinds of problems arise. The first type is related to the printing of the tracks of the corresponding circuit. The second one concerns the incorporation of conventional electronic devices, such as integrated circuits, on the textile substrate. Regarding the printing of tracks, this work studies the optimal design parameters of screen-printed silver tracks on textiles focused on printing an electronic circuit on a textile substrate. Several patterns of different widths and gaps between tracks were tested in order to find the best design parameters for some footprint configurations. With respect to the incorporation of devices on textile substrates, the paper analyzes the soldering of surface mount devices on fabric substrates. Due to the substrate's nature, low soldering temperatures must be used to avoid deformations or damage to the substrate caused by the higher temperatures used in conventional soldering. Several solder pastes used for low-temperature soldering are analyzed in terms of joint resistance and shear force application. The results obtained are satisfactory, demonstrating the viability of using flexible hybrid electronics with fabrics. As a practical result, a simple single-layer circuit was implemented to check the results of the research.
Collapse
Affiliation(s)
- Rocío Silvestre
- Textile Research Institute (AITEX), 03801 Alicante, Spain; (R.S.); (V.S.M.); (J.F.)
| | - Raúl Llinares Llopis
- Departamento de Comunicaciones, Universitat Politècnica de València, 03801 Alcoy, Spain;
| | - Laura Contat Rodrigo
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain;
| | | | - Josué Ferri
- Textile Research Institute (AITEX), 03801 Alicante, Spain; (R.S.); (V.S.M.); (J.F.)
| | - Eduardo Garcia-Breijo
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain;
| |
Collapse
|
8
|
Conductive coatings based on concentrated silver organosols stabilized with Tergitol NP4/Aerosol OT mixture. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Yaraki MT, Zahed Nasab S, Zare I, Dahri M, Moein Sadeghi M, Koohi M, Tan YN. Biomimetic Metallic Nanostructures for Biomedical Applications, Catalysis, and Beyond. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00285] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
| | - Shima Zahed Nasab
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 143951561, Iran
| | - Iman Zare
- Research and Development Department, Sina Medical Biochemistry Technologies Co. Ltd., Shiraz 7178795844, Iran
| | - Mohammad Dahri
- Student Research Committee, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz 71345, Iran
| | - Mohammad Moein Sadeghi
- Student Research Committee, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz 71345, Iran
| | - Maedeh Koohi
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan 45371-38791, Islamic Republic of Iran
| | - Yen Nee Tan
- Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, U.K
- Newcastle Research and Innovation Institute, Newcastle University in Singapore, 80 Jurong East Street 21, No. 05-04, 609607, Singapore
| |
Collapse
|
10
|
Feng F, Hong H, Gao X, Ren T, Ma Y, Feng P. Effectiveness of Oxygen during Sintering of Silver Thin Films Derived by Nanoparticle Ink. NANOMATERIALS 2022; 12:nano12111908. [PMID: 35683763 PMCID: PMC9181983 DOI: 10.3390/nano12111908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/28/2022] [Accepted: 05/29/2022] [Indexed: 12/23/2022]
Abstract
Silver nanoparticle (NP) inks have been widely used in the ink-jet printing field because of their excellent properties during low-temperature sintering. However, the organic dispersant used to prevent the aggregation and sedimentation of NPs can hinder the sintering process and result in the high resistivity of sintered films. In this study, silver thin films derived from silver NP ink with polyvinylpyrrolidone (PVP) dispersant were sintered in different atmospheres of pure nitrogen, air, and pure oxygen. The effect of the oxygen content in the sintering atmosphere on the thermal properties of the ink, the electrical resistivity and microstructure of the sintered films, and the amount of organic residue were studied by using differential scanning calorimetry, the four-point probe method, scanning electron microscopy, Fourier transform infrared spectroscopy, etc. The mechanism of optimizing the film resistivity by influencing the decomposition of the PVP dispersant and the microstructure evolution of the silver thin films through the sintering atmosphere was discussed. The results demonstrated that an oxygen-containing atmosphere could be effective for silver NPs in two ways. First, the oxygen content could enhance the diffusion ability of silver atoms, thus accelerating the stage transition of microstructural evolution at low temperatures. Second, the oxygen content could enable the PVP to decompose at a temperature much lower than in conditions of pure nitrogen, thus helping to finalize the densification of a silver film with a low resistivity of 2.47 μΩ·cm, which is approximately 1.5-fold that of bulk silver. Our findings could serve as a foundation for the subsequent establishment of ink-jet printing equipment and the optimization of the sintering process for printing silver patterns on flexible substrates.
Collapse
Affiliation(s)
- Feng Feng
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (F.F.); (H.H.); (T.R.)
| | - Haofeng Hong
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (F.F.); (H.H.); (T.R.)
| | - Xing Gao
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (F.F.); (H.H.); (T.R.)
- Shenzhen Jinzhou Precision Technology Corp., Shenzhen 518116, China
- Correspondence: (X.G.); (P.F.)
| | - Tian Ren
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (F.F.); (H.H.); (T.R.)
| | - Yuan Ma
- Shenzhen Tsingding Technology Co., Ltd., Shenzhen 518133, China;
| | - Pingfa Feng
- Division of Advanced Manufacturing, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; (F.F.); (H.H.); (T.R.)
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
- Correspondence: (X.G.); (P.F.)
| |
Collapse
|
11
|
Rogolino A, Claes N, Cizaurre J, Marauri A, Jumbo-Nogales A, Lawera Z, Kruse J, Sanromán-Iglesias M, Zarketa I, Calvo U, Jimenez-Izal E, Rakovich YP, Bals S, Matxain JM, Grzelczak M. Metal-Polymer Heterojunction in Colloidal-Phase Plasmonic Catalysis. J Phys Chem Lett 2022; 13:2264-2272. [PMID: 35239345 PMCID: PMC8935371 DOI: 10.1021/acs.jpclett.1c04242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
Plasmonic catalysis in the colloidal phase requires robust surface ligands that prevent particles from aggregation in adverse chemical environments and allow carrier flow from reagents to nanoparticles. This work describes the use of a water-soluble conjugated polymer comprising a thiophene moiety as a surface ligand for gold nanoparticles to create a hybrid system that, under the action of visible light, drives the conversion of the biorelevant NAD+ to its highly energetic reduced form NADH. A combination of advanced microscopy techniques and numerical simulations revealed that the robust metal-polymer heterojunction, rich in sulfonate functional groups, directs the interaction of electron-donor molecules with the plasmonic photocatalyst. The tight binding of polymer to the gold surface precludes the need for conventional transition-metal surface cocatalysts, which were previously shown to be essential for photocatalytic NAD+ reduction but are known to hinder the optical properties of plasmonic nanocrystals. Moreover, computational studies indicated that the coating polymer fosters a closer interaction between the sacrificial electron-donor triethanolamine and the nanoparticles, thus enhancing the reactivity.
Collapse
Affiliation(s)
- Andrea Rogolino
- Galilean
School of Higher Education, University of
Padova, 35122 Padova, Italy
| | - Nathalie Claes
- EMAT-University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Judit Cizaurre
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) Lardizabal Pasealekua 3, 20018 Donostia-San Sebastián, Spain
| | - Aimar Marauri
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) Lardizabal Pasealekua 3, 20018 Donostia-San Sebastián, Spain
| | - Alba Jumbo-Nogales
- Centro
de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-Sebastián, Spain
| | - Zuzanna Lawera
- Centro
de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-Sebastián, Spain
| | - Joscha Kruse
- Centro
de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-Sebastián, Spain
| | - María Sanromán-Iglesias
- Centro
de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-Sebastián, Spain
| | - Ibai Zarketa
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) Lardizabal Pasealekua 3, 20018 Donostia-San Sebastián, Spain
| | - Unai Calvo
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) Lardizabal Pasealekua 3, 20018 Donostia-San Sebastián, Spain
| | - Elisa Jimenez-Izal
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) Lardizabal Pasealekua 3, 20018 Donostia-San Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, Bilbao 48009, Spain
| | - Yury P. Rakovich
- Centro
de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-Sebastián, Spain
- Ikerbasque,
Basque Foundation for Science, Bilbao 48009, Spain
| | - Sara Bals
- EMAT-University
of Antwerp, Groenenborgerlaan
171, B-2020 Antwerp, Belgium
| | - Jon M. Matxain
- Kimika
Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU) Lardizabal Pasealekua 3, 20018 Donostia-San Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-Sebastián, Spain
| | - Marek Grzelczak
- Centro
de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-Sebastián, Spain
| |
Collapse
|
12
|
Traynor DJ, Ureña-Horno E, Hobson JJ, Croft EJ, Edwards SE, Rannard SP, Giardiello M. Aqueous (co)polymer stabilisers for size-controlled 2–5 nm gold nanoparticle synthesis with tuneable catalytic activity. NEW J CHEM 2022. [DOI: 10.1039/d2nj03257k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tuneable (co)polymer composition and architecture influences both AuNP size during synthesis and catalytic activity for the reduction of 4-Nitrophenol.
Collapse
Affiliation(s)
- Daniel J. Traynor
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Elena Ureña-Horno
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - James J. Hobson
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Centre of Excellence for Long-acting Therapeutics, University of Liverpool, West Derby Street, Liverpool L7 8TX, UK
| | - Elliot J. Croft
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Stephanie E. Edwards
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Steve P. Rannard
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Centre of Excellence for Long-acting Therapeutics, University of Liverpool, West Derby Street, Liverpool L7 8TX, UK
| | - Marco Giardiello
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| |
Collapse
|
13
|
Zámbó D, Rusch P, Lübkemann F, Bigall NC. Noble-Metal Nanorod Cryoaerogels with Electrocatalytically Active Surface Sites. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57774-57785. [PMID: 34813701 PMCID: PMC8662650 DOI: 10.1021/acsami.1c16424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Noble-metal-based electrocatalysts usually contain small nanoparticle building blocks to ensure a high specific surface area as the scene for the surface processes. Here, we show that relatively large noble-metal nanorods are also promising candidates to build up functional macrostructures with prominent electrocatalytic activity. After optimizing and upscaling the syntheses of gold nanorods and gold bipyramid-templated silver nanorods, cryoaerogels are fabricated on a conductive substrate via flash freezing and subsequent freeze drying. The versatile cryoaerogelation technique allows the formation of macrostructures with dendritic, open-pore structure facilitating the increase of the accessible nanorod surfaces. It is demonstrated via electrochemical oxidation and stripping test experiments that noble-metal surface sites are electrochemically active in redox reactions. Furthermore, gold nanorod cryoaerogels offer a platform for redox sensing, ethanol oxidation reaction, as well as glucose sensing. Compared to their simply drop-cast and dried counterparts, the noble-metal nanorod cryoaerogels offer enhanced activity due to the open porosity of the fabricated nanostructure while maintaining structural stability.
Collapse
Affiliation(s)
- Dániel Zámbó
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
- Centre
for Energy Research, Institute of Technical
Physics and Materials Science, Konkoly-Thege M. str. 29-33, 1121 Budapest, Hungary
| | - Pascal Rusch
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
| | - Franziska Lübkemann
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
| | - Nadja C. Bigall
- Institute
of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30519 Hanover, Germany
- Cluster
of Excellence PhoenixD (Photonics, Optics and Engineering −
Innovation Across Disciplines), Leibniz
Universität Hannover, 30167 Hanover, Germany
| |
Collapse
|
14
|
Escudero A, González-García L, Strahl R, Kang DJ, Drzic J, Kraus T. Large-Scale Synthesis of Hybrid Conductive Polymer-Gold Nanoparticles Using "Sacrificial" Weakly Binding Ligands for Printing Electronics. Inorg Chem 2021; 60:17103-17113. [PMID: 34735769 DOI: 10.1021/acs.inorgchem.1c02350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe the gram-scale synthesis of hybrid gold nanoparticles with a shell of conductive polymers. A large-scale synthesis of hexadecyltrimethylammonium bromide (CTAB)-capped gold nanoparticles (AuNP@CTAB) was followed by ligand exchange with conductive polymers based on thiophene in a 10 L reactor equipped with a jacket to ensure a constant temperature of 40 °C and a mechanical stirrer. Slow and controlled reduction of the gold precursors and the presence of small amounts of silver nitrate are revealed to be the critical synthesis variables to obtain particles with a sufficiently narrow size distribution. Batches of approximately 10 g of faceted AuNP@CTAB with tunable average particle sizes from 54 to 85 nm were obtained per batch. Ligand exchange with poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) in the same reactor then yielded hybrid Au@PEDOT:PSS nanoparticles. They were used to formulate sinter-free inks for the inkjet printing of conductive structures without the need for a sintering step.
Collapse
Affiliation(s)
- Alberto Escudero
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.,Departamento de Química Inorgánica and Instituto de Investigaciones Químicas (IIQ), Universidad de Sevilla─CSIC, Calle Américo Vespucio 49, 41092 Seville, Spain
| | - Lola González-García
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Robert Strahl
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Dong Jin Kang
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Juraj Drzic
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Tobias Kraus
- INM─Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.,Colloid and Interface Chemistry, Saarland University, 66123 Saarbrücken, Germany
| |
Collapse
|
15
|
Jeon Y, Kim D, Kwon G, Lee K, Oh CS, Kim UJ, You J. Detection of nanoplastics based on surface-enhanced Raman scattering with silver nanowire arrays on regenerated cellulose films. Carbohydr Polym 2021; 272:118470. [PMID: 34420729 DOI: 10.1016/j.carbpol.2021.118470] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/18/2021] [Accepted: 07/16/2021] [Indexed: 01/03/2023]
Abstract
Plastic pollution has steadily become a global issue due to its ubiquity and degradation into micro and nanoparticles. Herein, we report the construction of surface-enhanced Raman scattering (SERS)-active array substrates with regenerated cellulose (RC) and plasmonic nanoparticles (AuNRs and AgNWs) via a simple vacuum-assisted filtration method using a silicon mask for rapid nanoplastic detection. The AgNWs/RC film exhibited a SERS intensity of crystal violet approximately six times higher than that of the AuNRs/RC film with a high enhancement factor of 1.8 × 107. Moreover, the AgNWs/RC film exhibits a better SERS activity for polystyrene nanoplastic detection than the AuNRs/RC film because the dense AgNW network structures are well suited for nanoplastic detection. The AgNWs/RC film can detect PS nanoplastics down to 0.1 mg/mL with a good reproducibility of the SERS signal. The low-cost, flexible, and highly sensitive AgNWs/RC films could provide an efficient and rapid SERS-based method for nanoplastic detection.
Collapse
Affiliation(s)
- Youngho Jeon
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
| | - Dabum Kim
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
| | - Goomin Kwon
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
| | - Kangyun Lee
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
| | - Chang-Sik Oh
- Department of Horticultural Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
| | - Ung-Jin Kim
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
| | - Jungmok You
- Department of Plant & Environmental New Resources and Graduate School of Biotechnology, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea.
| |
Collapse
|
16
|
Abdolmaleki H, Kidmose P, Agarwala S. Droplet-Based Techniques for Printing of Functional Inks for Flexible Physical Sensors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006792. [PMID: 33772919 DOI: 10.1002/adma.202006792] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 12/06/2020] [Indexed: 05/16/2023]
Abstract
Printed electronics (PE) is an emerging technology that uses functional inks to print electrical components and circuits on variety of substrates. This technology has opened up new possibilities to fabricate flexible, bendable, and form-fitting devices at low-cost and fast speed. There are different printing technologies in use, among which droplet-based techniques are of great interest as they provide the possibility of printing computer-controlled design patterns with high resolution, and greater production flexibility. Nanomaterial inks form the heart of this technology, enabling different functionalities. To this end, intensive research has been carried out on formulating inks with conductive, semiconductive, magnetic, piezoresistive, and piezoelectric properties. Here, a detailed landscape view on different droplet-based printing technologies (inkjet, aerosol jet, and electrohydrodynamic jet) is provided, with comprehensive discussion on their working principals. This is followed by a detailed research overview of different functional inks (metal, carbon, polymer, and ceramic). Different sintering methods and common substrates being used in printed electronics are also discussed, followed by an in-depth review of different physical sensors fabricated by droplet-based techniques. Finally, the challenges facing the field are considered and a perspective on possible ways to overcome them is provided.
Collapse
Affiliation(s)
- Hamed Abdolmaleki
- Department of Engineering, Aarhus University, Finlandsgade 22, Aarhus, 8200, Denmark
| | - Preben Kidmose
- Department of Engineering, Aarhus University, Finlandsgade 22, Aarhus, 8200, Denmark
| | - Shweta Agarwala
- Department of Engineering, Aarhus University, Finlandsgade 22, Aarhus, 8200, Denmark
| |
Collapse
|
17
|
Steiner AM, Lissel F, Fery A, Lauth J, Scheele M. Perspektiven gekoppelter organisch‐anorganischer Nanostrukturen für Ladungs‐ und Energietransferanwendungen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.201916402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anja Maria Steiner
- Institut Physikalische Chemie und Physik der Polymere Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
| | - Franziska Lissel
- Institut Makromolekulare Chemie Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
- Technische Universität Dresden Mommsenstr. 4 01064 Dresden Deutschland
| | - Andreas Fery
- Institut Physikalische Chemie und Physik der Polymere Leibniz-Institut für Polymerforschung Hohe Str. 6 01069 Dresden Deutschland
- Technische Universität Dresden Mommsenstr. 4 01064 Dresden Deutschland
| | - Jannika Lauth
- Leibniz-Universität Hannover Institut für Physikalische Chemie und Elektrochemie Callinstr. 3A 30167 Hannover Deutschland
| | - Marcus Scheele
- Eberhard-Karls-Universität Tübingen Institut für Physikalische und Theoretische Chemie Auf der Morgenstelle 18 72076 Tübingen Deutschland
| |
Collapse
|
18
|
Steiner AM, Lissel F, Fery A, Lauth J, Scheele M. Prospects of Coupled Organic-Inorganic Nanostructures for Charge and Energy Transfer Applications. Angew Chem Int Ed Engl 2021; 60:1152-1175. [PMID: 32173981 PMCID: PMC7821299 DOI: 10.1002/anie.201916402] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 12/20/2022]
Abstract
We review the field of organic-inorganic nanocomposites with a focus on materials that exhibit a significant degree of electronic coupling across the hybrid interface. These nanocomposites undergo a variety of charge and energy transfer processes, enabling optoelectronic applications in devices which exploit singlet fission, triplet energy harvesting, photon upconversion or hot charge carrier transfer. We discuss the physical chemistry of the most common organic and inorganic components. Based on those we derive synthesis and assembly strategies and design criteria on material and device level with a focus on photovoltaics, spin memories or optical upconverters. We conclude that future research in the field should be directed towards an improved understanding of the binding motif and molecular orientation at the hybrid interface.
Collapse
Affiliation(s)
- Anja Maria Steiner
- Institute for Physical Chemistry and Polymer PhysicsLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
| | - Franziska Lissel
- Institute of Macromolecular ChemistryLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
- Technische Universität DresdenMommsenstr. 401064DresdenGermany
| | - Andreas Fery
- Institute for Physical Chemistry and Polymer PhysicsLeibniz Institute of Polymer ResearchHohe Str. 601069DresdenGermany
- Technische Universität DresdenMommsenstr. 401064DresdenGermany
| | - Jannika Lauth
- Leibniz Universität HannoverInstitute of Physical Chemistry and ElectrochemistryCallinstr. 3A30167HannoverGermany
| | - Marcus Scheele
- Eberhard Karls-Universität TübingenInstitute of Physical and Theoretical ChemistryAuf der Morgenstelle 1872076TübingenGermany
| |
Collapse
|
19
|
Zhang J, Fu B, Song C, Shang W, Tao P, Deng T. Ethylene glycol nanofluids dispersed with monolayer graphene oxide nanosheet for high-performance subzero cold thermal energy storage. RSC Adv 2021; 11:30495-30502. [PMID: 35479859 PMCID: PMC9041135 DOI: 10.1039/d1ra04484b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/31/2021] [Indexed: 11/21/2022] Open
Abstract
Ethylene glycol (EG) nanofluids have been intensively explored as one of the most promising solid–liquid phase change materials for subzero cold thermal energy storage (CTES). However, the prepared nanofluids usually suffer from a large supercooling degree, a long freezing period, reduced storage capacity and poor dispersion stability. Herein, we overcome these issues by developing stable EG nanofluids that are uniformly dispersed with low concentrations of monolayer ethanol-wetted graphene oxide nanosheets. The homogeneously dispersed monolayer sheet not only improves the thermal conductivity of the nanofluids (12.1%) but also provides the heterogeneous nucleation sites to trigger the crystal formation, thereby shortening the freezing time and reducing the supercooling degree. Compared with the base fluid, the nanofluids have reduced the supercooling degree by 87.2%, shortened the freezing time by 78.2% and maintained 98.5% of the latent heat. Moreover, the EG nanofluids have retained their initial stable homogeneous dispersion after repeated freezing/melting for 50 cycles, which ensures consistent CTES behavior during long-period operations. The facile preparation process, low loading requirement and consistent superior thermophysical properties would make the EG nanofluids loaded with monolayer graphene oxide sheets promising coolants for high-performance phase change-based CTES. Homogeneously dispersed monolayer graphene oxide sheet in ethylene glycol solution enable a high-performance cold thermal energy storage.![]()
Collapse
Affiliation(s)
- Jingyi Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Benwei Fu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| |
Collapse
|
20
|
Wang X, Xu D, Jaquet B, Yang Y, Wang J, Huang H, Chen Y, Gerhard C, Zhang K. Structural Colors by Synergistic Birefringence and Surface Plasmon Resonance. ACS NANO 2020; 14:16832-16839. [PMID: 33290653 DOI: 10.1021/acsnano.0c05599] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
One-dimensional nanomaterials including cellulose nanocrystals (CNCs) and gold nanorods (GNRs) are widely used in optical materials due to their respective inherent features: birefringence with accompanying light retardation and surface plasmon resonance (SPR). Herein, we successfully combine these properties of both nanorods to generate synergistic and readily tunable structural colors in hybrid composite polymer films. CNCs and GNRs are embedded either in the same or in separate films after unidirectional alignment in dynamic hydrogels. By synergistically leveraging CNCs and GNRs with diverse amounts in hybrid films or stacked separate films, wide-ranging structural colors are obtained, far beyond those from films solely with aligned CNCs or GNRs. Higher GNR contents enhance light absorption at 520 nm with promoted magenta colors, while more CNCs affect the overall phase retardation with light absorption between 400 and 700 nm between crossed polarizers. Moreover, adjusting the angles between films solely with CNCs or GNRs via a stacking/rotating technique successively manipulates colors with flexible film combinations. By rotating the films with aligned GNRs (0-180°), light absorption can traverse from ∼500 to 650 nm. Thus, tuning the adjustable synergism of birefringence of CNCs and SPR of GNRs provides great potential for structural colors, which enlightens inspirations for designing functional optical materials.
Collapse
Affiliation(s)
- Xiaojie Wang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Dan Xu
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Bea Jaquet
- Faculty of Engineering and Health, University of Applied Sciences and Arts, Von-Ossietzky-Straße 99, 37085 Göttingen, Germany
| | - Yang Yang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, People's Republic of China
| | - Jiaxiu Wang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Heqin Huang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| | - Ye Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China
| | - Christoph Gerhard
- Faculty of Engineering and Health, University of Applied Sciences and Arts, Von-Ossietzky-Straße 99, 37085 Göttingen, Germany
| | - Kai Zhang
- Wood Technology and Wood Chemistry, Department of Wood Technology and Wood-based Composites, Georg-August-University of Göttingen, Büsgenweg 4, D-37077 Göttingen, Germany
| |
Collapse
|
21
|
Backes IK, González-Garcı A L, Holtsch A, Müller F, Jacobs K, Kraus T. Molecular Origin of Electrical Conductivity in Gold-Polythiophene Hybrid Particle Films. J Phys Chem Lett 2020; 11:10538-10547. [PMID: 33290078 DOI: 10.1021/acs.jpclett.0c02831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hybrid electronic materials combine inorganic metals and semiconductors with π-conjugated polymers. The orientation of the polymer molecules in relation to the inorganic components is crucial for electrical material properties and device performance, but little is known of the configuration of π-conjugated polymers that bind to inorganic surfaces. Highly curved surfaces are common when using nanoscale components, for example, metal nanocrystal cores covered with conductive polymers. It is important to understand their effect on molecular arrangement. Here, we compare the molecular structures and electrical conductivities of well-defined nanoscale gold spheres and rods with shells of the covalently bound polythiophene PTEBS (poly[2-(3-thienyl)-ethyloxy-4-butylsulfonate]). We prepared aqueous sinter-free inks from the particles and printed them. The particles formed highly conductive films immediately after drying. Films with spherical metal cores consistently had 40% lower conductivities than films based on nanorods. Raman and X-ray photoelectron spectroscopy revealed differences in the gold-sulfur bonds of PTEBS on rods and spheres. The fractions of bond sulfur groups implied differences in the alignment of PTEBS with the surface. More polymer molecules were bound in an edge-on configuration on spheres than on rods, where almost all polymers aligned "face-on" with the metal surface. This leads to different interface resistances: gold-polythiophene-gold interfaces between rods with π-π-tacked face-on PTEBS apparently foster electron transport along the surface-normal direction, while edge-on PTEBS does not. Molecular confinement thus increases the conductivity of hybrid inks based on highly curved nanostructures.
Collapse
Affiliation(s)
- Indra K Backes
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | | | - Anne Holtsch
- Experimental Physics and Center for Biophysics, Campus E2 9, Saarland University, 66123 Saarbrücken, Germany
| | - Frank Müller
- Experimental Physics and Center for Biophysics, Campus E2 9, Saarland University, 66123 Saarbrücken, Germany
| | - Karin Jacobs
- Experimental Physics and Center for Biophysics, Campus E2 9, Saarland University, 66123 Saarbrücken, Germany
| | - Tobias Kraus
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Colloid and Interface Chemistry, Saarland University, Campus D2 2, 66123 Saarbrücken, Germany
| |
Collapse
|
22
|
Maikranz E, Spengler C, Thewes N, Thewes A, Nolle F, Jung P, Bischoff M, Santen L, Jacobs K. Different binding mechanisms of Staphylococcus aureus to hydrophobic and hydrophilic surfaces. NANOSCALE 2020; 12:19267-19275. [PMID: 32935690 DOI: 10.1039/d0nr03134h] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Bacterial adhesion to surfaces is a crucial step in initial biofilm formation. In a combined experimental and computational approach, we studied the adhesion of the pathogenic bacterium Staphylococcus aureus to hydrophilic and hydrophobic surfaces. We used atomic force microscopy-based single-cell force spectroscopy and Monte Carlo simulations to investigate the similarities and differences of adhesion to hydrophilic and hydrophobic surfaces. Our results reveal that binding to both types of surfaces is mediated by thermally fluctuating cell wall macromolecules that behave differently on each type of substrate: on hydrophobic surfaces, many macromolecules are involved in adhesion, yet only weakly tethered, leading to high variance between individual bacteria, but low variance between repetitions with the same bacterium. On hydrophilic surfaces, however, only few macromolecules tether strongly to the surface. Since during every repetition with the same bacterium different macromolecules bind, we observe a comparable variance between repetitions and different bacteria. We expect these findings to be of importance for the understanding of the adhesion behaviour of many bacterial species as well as other microorganisms and even nanoparticles with soft, macromolecular coatings, used e.g. for biological diagnostics.
Collapse
Affiliation(s)
- Erik Maikranz
- Theoretical Physics, Saarland University, Center for Biophysics, 66123 Saarbrücken, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Kang DJ, Jüttke Y, González-García L, Escudero A, Haft M, Kraus T. Reversible Conductive Inkjet Printing of Healable and Recyclable Electrodes on Cardboard and Paper. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000928. [PMID: 32462772 DOI: 10.1002/smll.202000928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
Conductive inkjet printing with metal nanoparticles is irreversible because the particles are sintered into a continuous metal film. The resulting structures are difficult to remove or repair and prone to cracking. Here, a hybrid ink is used to obviate the sintering step and print interconnected particle networks that become highly conductive immediately after drying. It is shown that reversible conductive printing is possible on low-cost cardboard samples after applying standard paper industry coats that are adapted in terms of surface energy and porosity. The conductivity of the printed films approaches that of sintered standard inks on the same substrate, but the mobility of the hybrid particle film makes them less sensitive to cracks during bending and folding of the substrate. Damages that occur can be partially repaired by wetting the film such that particle mobility is increased and particles move to bridge insulating gaps in the film. It is demonstrated that the conductive material can be recovered from the cardboard at the end of its life time and be redispersed to recycle the particles and reuse them in conductive inks.
Collapse
Affiliation(s)
- Dong Jin Kang
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
| | - Yvonne Jüttke
- PTS - Papiertechnische Stiftung, Pirnaer Straße 37, Heidenau, 01809, Germany
| | - Lola González-García
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
| | - Alberto Escudero
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
| | - Marcel Haft
- PTS - Papiertechnische Stiftung, Pirnaer Straße 37, Heidenau, 01809, Germany
| | - Tobias Kraus
- INM - Leibniz Institute for New Materials, Campus D2 2, Saarbrücken, 66123, Germany
- Colloid and Interface Chemistry, Saarland University, Saarbrücken, 66123, Germany
| |
Collapse
|
24
|
Controlled phage therapy by photothermal ablation of specific bacterial species using gold nanorods targeted by chimeric phages. Proc Natl Acad Sci U S A 2020; 117:1951-1961. [PMID: 31932441 PMCID: PMC6994977 DOI: 10.1073/pnas.1913234117] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
New methods for detecting and killing antibiotic-resistant, Gram-negative bacteria are of prime interest for a wide variety of applications. While phages have long been considered as potential antibacterial agents, many concerns about phage therapy stem from the fact that phages are replicating, evolvable entities whose biology is poorly understood in most cases. These concerns could be addressed by destroying the phage immediately upon use. We accomplish this by conjugating phages to gold nanorods, whose excitation by near-infrared light causes localized heating that essentially cooks nearby bacteria. Thus, the phages deliver gold nanorods to the targeted bacteria, and the nanorods destroy both bacteria and phages simultaneously. This strategy transforms phages from an evolving biological entity into a controlled, drug-like reagent. The use of bacteriophages (phages) for antibacterial therapy is under increasing consideration to treat antimicrobial-resistant infections. Phages have evolved multiple mechanisms to target their bacterial hosts, such as high-affinity, environmentally hardy receptor-binding proteins. However, traditional phage therapy suffers from multiple challenges stemming from the use of an exponentially replicating, evolving entity whose biology is not fully characterized (e.g., potential gene transduction). To address this problem, we conjugate the phages to gold nanorods, creating a reagent that can be destroyed upon use (termed “phanorods”). Chimeric phages were engineered to attach specifically to several Gram-negative organisms, including the human pathogens Escherichia coli, Pseudomonas aeruginosa, and Vibrio cholerae, and the plant pathogen Xanthomonas campestris. The bioconjugated phanorods could selectively target and kill specific bacterial cells using photothermal ablation. Following excitation by near-infrared light, gold nanorods release energy through nonradiative decay pathways, locally generating heat that efficiently kills targeted bacterial cells. Specificity was highlighted in the context of a P. aeruginosa biofilm, in which phanorod irradiation killed bacterial cells while causing minimal damage to epithelial cells. Local temperature and viscosity measurements revealed highly localized and selective ablation of the bacteria. Irradiation of the phanorods also destroyed the phages, preventing replication and reducing potential risks of traditional phage therapy while enabling control over dosing. The phanorod strategy integrates the highly evolved targeting strategies of phages with the photothermal properties of gold nanorods, creating a well-controlled platform for systematic killing of bacterial cells.
Collapse
|
25
|
Akhtartavan S, Karimi M, Sattarahmady N, Heli H. An electrochemical signal-on apta-cyto-sensor for quantitation of circulating human MDA-MB-231 breast cancer cells by transduction of electro-deposited non-spherical nanoparticles of gold. J Pharm Biomed Anal 2019; 178:112948. [PMID: 31704128 DOI: 10.1016/j.jpba.2019.112948] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 10/18/2019] [Accepted: 10/20/2019] [Indexed: 11/29/2022]
Abstract
A highly simple, sensitive, specific and low-cost electrochemical apta-cyto-sensor for determination of circulating human MDA-MB-231 breast cancer cells was fabricated. Non-spherical nanoparticles of gold were electro-deposited in the presence of ethosuximide as a shape directing and size controlling agent. The nanoparticles had dimensions ranging 50-150 nm, and covered the underlying surface with a roughness factor of 8.03. The Non-spherical nanoparticles were then employed as the apta-cyto-sensor transducer. A 83-mer DNA aptamer that is specific to capturing the cell surface proteins was immobilized on the transducer surface, and binding with the cells was followed using the ferro/ferricyanide redox marker. The aptamer was immobilized within ∼200 min on the transducer surface. The cells were quantified with an equation of regression of ΔIp(μA) = (1.028 ± 0.027) log (C (cell mL-1)) + (0.2199 ± 0.0944), a sensitivity of 1.028 μA (log (concentration / cell mL-1))-1 and a quantitation limit of 2 cell mL-1, in a concentration range of 5 to 2 × 106 cell mL-1. The apta-cyto-sensor selectivity was also evaluated toward AsPC-1, Calu-6, HeLa, MCF-7 and melanoma B16/F10 cell lines. The apta-cyto-sensor had a fabrication reproducibility of 4.2%, regeneration capability of 5.1%, a stability of 35 days, and a potential application for the detection of MDA-MB-231 cells in the spiked blood serum samples with a sensitivity of 0.8975 μA (log (concentration / cell mL-1))-1 and a quantitation limit of 5 cell mL-1, in a concentration range of 10 to 1 × 103 cell mL-1. The apta-cyto-sensor would be applicable for breast cancer diagnosis at early stage.
Collapse
Affiliation(s)
- S Akhtartavan
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M Karimi
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - N Sattarahmady
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - H Heli
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| |
Collapse
|
26
|
Mozaffari S, Li W, Dixit M, Seifert S, Lee B, Kovarik L, Mpourmpakis G, Karim AM. The role of nanoparticle size and ligand coverage in size focusing of colloidal metal nanoparticles. NANOSCALE ADVANCES 2019; 1:4052-4066. [PMID: 36132098 PMCID: PMC9417622 DOI: 10.1039/c9na00348g] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 09/05/2019] [Indexed: 05/10/2023]
Abstract
Controlling the size distribution of nanoparticles is important for many applications and typically involves the use of ligands during synthesis. In this study, we show that the mechanism of size focusing involves a dependence of the growth rate on the size of the nanoparticles and the ligand coverage on the surface of the nanoparticles. To demonstrate these effects, we used in situ small angle X-ray scattering (SAXS) and population balance kinetic modeling (PBM) to investigate the evolution of size distribution during the synthesis of colloidal Pd metal nanoparticles. Despite temporal overlap of nucleation and growth, our in situ SAXS show size focusing of the distribution under different synthetic conditions (different concentrations of metal and ligand as well as solvent type). To understand the mechanism of size focusing using PBM, we systematically studied how the evolution of the nanoparticle size distribution is affected by nucleation rate, and dependence of the growth rate constant on ligand surface coverage, and size of the nanoparticles. We show that continuous nucleation contributes to size defocusing. However, continuous nucleation results in different reaction times for the nanoparticle population leading to time and size-dependent ligand surface coverage. Using density functional theory (DFT) calculations and Brønsted-Evans-Polanyi relations, we show that as the population grows, larger nanoparticles grow more slowly than smaller ones due to lower intrinsic activity and higher ligand coverage on the surface. Therefore, despite continuous nucleation, the faster growth of smaller nanoparticles in the population leads to size focusing. The size focusing behaviour (due to faster growth of smaller nanoparticles) was found to be model independent and similar results were demonstrated under different nucleation and growth pathways (e.g. growth via ion reduction on the surface and/or monomer addition). Our results provide a microscopic connection between kinetics and thermodynamics of nanoparticle growth and metal-ligand binding, and their effect on the size distribution of colloidal nanoparticles.
Collapse
Affiliation(s)
- Saeed Mozaffari
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University Blacksburg VA 24060 USA
| | - Wenhui Li
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University Blacksburg VA 24060 USA
| | - Mudit Dixit
- Department of Chemical Engineering, University of Pittsburgh Pittsburgh Pennsylvania 15261 USA
| | - Soenke Seifert
- Advanced Photon Source, Argonne National Laboratory Argonne IL 60439 USA
| | - Byeongdu Lee
- X-ray Science Division, Argonne National Laboratory Argonne IL 60439 USA
| | - Libor Kovarik
- Environmental Molecular Science Laboratory, Pacific Northwest National Laboratory Richland Washington 99352 USA
| | - Giannis Mpourmpakis
- Department of Chemical Engineering, University of Pittsburgh Pittsburgh Pennsylvania 15261 USA
| | - Ayman M Karim
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University Blacksburg VA 24060 USA
| |
Collapse
|
27
|
Popovetskiy PS, Arymbaeva AT, Bordzilovskiy DS, Mayorov AP, Maksimovskiy EA, Bulavchenko AI. Synthesis and Electrophoretic Concentration of Silver Nanoparticles in Water-in-Oil Emulsions of Sodium Bis(2-Ethylhexyl) Sulfosuccinate and Preparation of Conductive from Them Coatings by Selective Laser Sintering. COLLOID JOURNAL 2019. [DOI: 10.1134/s1061933x19040112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
28
|
Popovetskiy PS, Bulavchenko AI, Arymbaeva AT, Bulavchenko OA, Petrova NI. Synthesis and Electrophoretic Concentration of Ag–Cu Nanoparticles of the Core–Shell Type in an AOT Microemulsion in n-Decane. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419080235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
29
|
Zhang P, Reiser B, González-García L, Beck S, Drzic J, Kraus T. Drying of electrically conductive hybrid polymer-gold nanorods studied with in situ microbeam GISAXS. NANOSCALE 2019; 11:6538-6543. [PMID: 30907898 DOI: 10.1039/c8nr09872g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Gold nanorods (AuNRs) with conductive polymer shells are interesting colloidal building blocks for electronics. Hybrid particles with AuNR cores and poly(3,4-ethylenedioxythiophene) or polystyrene sulfonate (PEDOT:PSS) shells were prepared as stable aqueous dispersions. Film formation during the drying of such dispersions is known to affect the electric conductivity of the material. We observed the mechanisms of drying in thin, spray-coated films with grazing incidence small-angle X-ray scattering (GISAXS). A sparse, uniform monolayer formed because the anisotropic shape of the AuNR inhibited "coffee-ring" effects. We used generalized two-dimensional correlation (2DC) spectroscopy to analyze the GISAXS data and to decipher the microscopic structure formation of the film during drying. Four major scattering peaks were attributed to porous PEDOT, PSS, Au, and the substrate layer. Their time-dependent intensity indicated the sequence of film formation: AuNRs with mobile shells arranged on the substrate first, and PEDOT and then PSS dried sequentially around the gold core. We discuss the final phase-separation of PEDOT:PSS on the hybrid rods.
Collapse
Affiliation(s)
- Peng Zhang
- INM-Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany.
| | | | | | | | | | | |
Collapse
|
30
|
Arenas-Guerrero P, Delgado ÁV, Donovan KJ, Scott K, Bellini T, Mantegazza F, Jiménez ML. Determination of the size distribution of non-spherical nanoparticles by electric birefringence-based methods. Sci Rep 2018; 8:9502. [PMID: 29934624 PMCID: PMC6015062 DOI: 10.1038/s41598-018-27840-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 06/11/2018] [Indexed: 12/03/2022] Open
Abstract
The in situ determination of the size distribution of dispersed non-spherical nanoparticles is an essential characterization tool for the investigation and use of colloidal suspensions. In this work, we test a size characterization method based on the measurement of the transient behaviour of the birefringence induced in the dispersions by pulsed electric fields. The specific shape of such relaxations depends on the distribution of the rotational diffusion coefficient of the suspended particles. We analyse the measured transient birefringence with three approaches: the stretched-exponential, Watson-Jennings, and multi-exponential methods. These are applied to six different types of rod-like and planar particles: PTFE rods, goethite needles, single- and double-walled carbon nanotubes, sodium montmorillonite particles and gibbsite platelets. The results are compared to electron microscopy and dynamic light scattering measurements. The methods here considered provide good or excellent results in all cases, proving that the analysis of the transient birefringence is a powerful tool to obtain complete size distributions of non-spherical particles in suspension.
Collapse
Affiliation(s)
| | - Ángel V Delgado
- Department of Applied Physics, Univ. Granada, Granada, 18071, Spain
| | - Kevin J Donovan
- School of Physics and Astronomy, Queen Mary Univ. London, London, E14NS, UK
| | - Kenneth Scott
- School of Physics and Astronomy, Queen Mary Univ. London, London, E14NS, UK
| | - Tommaso Bellini
- Department Med. Biotechnol. and Translat. Med., Univ. Milan, Milan, I20090, Italy
| | - Francesco Mantegazza
- Department Medicina e Chirurgia, Univ. Milano-Bicocca, Vedano al Lambro, MB, 20854, Italy
| | - María L Jiménez
- Department of Applied Physics, Univ. Granada, Granada, 18071, Spain.
| |
Collapse
|
31
|
Esquivel R, Canale I, Ramirez M, Hernández P, Zavala-Rivera P, Álvarez-Ramos E, Lucero-Acuña A. Poly(N-isopropylacrylamide)-coated gold nanorods mediated by thiolated chitosan layer: thermo-pH responsiveness and optical properties. E-POLYMERS 2018. [DOI: 10.1515/epoly-2017-0135] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
AbstractA core-shell of colloidal metal-responsive polymer provides an innovative model in functional materials. These core-shell nanocomposites offer the possibility to control some properties, such as particle size, surface plasmon resonance and morphology. In this research, we demonstrate the successful synthesis and functionality of gold nanorods (GNR) coated with the polymers chitosan (Ch) and poly(N-isopropylacrylamide) (PNIPAM). The polymer coatings are performed using a two-step method. First, GNR were coated with a thiolated chitosan (GNR-Ch) by replacing hexadecyltrimethylammonium bromide with a chitosan thiomer. Structural modification of GNR-Ch was monitored by Fourier transform infrared spectroscopy. Then a second polymeric coating was done by in situ free radical polymerization of N-isopropylacrylamide (NIPAM) on GNR-Ch to obtain the nanocomposite GNR-Ch-PNIPAM. The nanocomposite average size was analyzed by dynamic light scattering. The evolution of ζ potentials during the coatings was measured using electrophoretic mobility. GNR-Ch-PNIPAM presented a collapsed structure when heated above the lower critical solution temperature. The particle size of GNR-Ch-PNIPAM was manipulated by changing the pH. Plasmonic properties were evaluated by UV-Vis spectroscopy. Results showed an important blue shift due to the PNIPAM coating thickness. Thermo- and pH-responsive properties of the nanocomposite GNR-Ch-PNIPAM could be used as a drug delivery system.
Collapse
Affiliation(s)
- Reynaldo Esquivel
- Nanotechnology Graduate Program, Department of Physics, University of Sonora, Hermosillo 83000, Mexico
- National Council of Science and Technology of Mexico, Ciudad de Mexico, 03940, Mexico
| | - Iván Canale
- Nanotechnology Graduate Program, Department of Physics, University of Sonora, Hermosillo 83000, Mexico
| | - Maricela Ramirez
- General Hospital, National Medical Center “La Raza”, Mexican Social Security Institute, Mexico City, Mexico
| | - Pedro Hernández
- Nanotechnology Graduate Program, Department of Physics, University of Sonora, Hermosillo 83000, Mexico
| | - Paul Zavala-Rivera
- Department of Chemical and Metallurgical Engineering, University of Sonora, Hermosillo 83000, Mexico, Tel.: +52-662-259-2105
| | - Enrique Álvarez-Ramos
- Nanotechnology Graduate Program, Department of Physics, University of Sonora, Hermosillo 83000, Mexico
| | - Armando Lucero-Acuña
- Department of Chemical and Metallurgical Engineering, University of Sonora, Hermosillo 83000, Mexico, Tel.: +52-662-259-2105
| |
Collapse
|
32
|
Kanelidis I, Kraus T. The role of ligands in coinage-metal nanoparticles for electronics. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:2625-2639. [PMID: 29259877 PMCID: PMC5727811 DOI: 10.3762/bjnano.8.263] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 11/06/2017] [Indexed: 06/02/2023]
Abstract
Coinage-metal nanoparticles are key components of many printable electronic inks. They can be combined with polymers to form conductive composites and have been used as the basis of molecular electronic devices. This review summarizes the multidimensional role of surface ligands that cover their metal cores. Ligands not only passivate crystal facets and determine growth rates and shapes; they also affect size and colloidal stability. Particle shapes can be tuned via the ligand choice while ligand length, size, ω-functionalities, and chemical nature influence shelf-life and stability of nanoparticles in dispersions. When particles are deposited, ligands affect the electrical properties of the resulting film, the morphology of particle films, and the nature of the interfaces. The effects of the ligands on sintering, cross-linking, and self-assembly of particles in electronic materials are discussed.
Collapse
Affiliation(s)
- Ioannis Kanelidis
- INM – Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
| | - Tobias Kraus
- INM – Leibniz Institute for New Materials, Campus D2 2, 66123 Saarbrücken, Germany
- Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| |
Collapse
|
33
|
Review of Recent Inkjet-Printed Capacitive Tactile Sensors. SENSORS 2017; 17:s17112593. [PMID: 29125584 PMCID: PMC5713153 DOI: 10.3390/s17112593] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 10/20/2017] [Accepted: 11/07/2017] [Indexed: 11/17/2022]
Abstract
Inkjet printing is an advanced printing technology that has been used to develop conducting layers, interconnects and other features on a variety of substrates. It is an additive manufacturing process that offers cost-effective, lightweight designs and simplifies the fabrication process with little effort. There is hardly sufficient research on tactile sensors and inkjet printing. Advancements in materials science and inkjet printing greatly facilitate the realization of sophisticated tactile sensors. Starting from the concept of capacitive sensing, a brief comparison of printing techniques, the essential requirements of inkjet-printing and the attractive features of state-of-the art inkjet-printed tactile sensors developed on diverse substrates (paper, polymer, glass and textile) are presented in this comprehensive review. Recent trends in inkjet-printed wearable/flexible and foldable tactile sensors are evaluated, paving the way for future research.
Collapse
|