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Layer-by-Layer Spra...
Layer-by-Layer Spray-Coating of Cellulose Nanofibrils and Silver Nanoparticles for Hydrophilic Interfaces
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- Chen, Qing (författare)
- DESY, D-22607 Hamburg, Germany.;Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei 230026, Peoples R China.
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- Brett, Calvin (författare)
- KTH,Teknisk mekanik,Wallenberg Wood Science Center,DESY, D-22607 Hamburg, Germany.
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- Chumakov, Andrei (författare)
- DESY, D-22607 Hamburg, Germany.
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- Gensch, Marc (författare)
- DESY, D-22607 Hamburg, Germany.;Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany.
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- Schwartzkopf, Matthias (författare)
- DESY, D-22607 Hamburg, Germany.
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- Koerstgens, Volker (författare)
- Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany.
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- Söderberg, Daniel (författare)
- KTH,Wallenberg Wood Science Center,Teknisk mekanik,Fiberprocesser
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- Plech, Anton (författare)
- Karlsruhe Inst Technol KIT, Inst Photon Sci & Synchrotron Radiat, D-76021 Karlsruhe, Germany.
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- Zhang, Peng (författare)
- Sun Yat Sen Univ, Sch Mat Sci & Engn, PCFM Lab, Guangzhou 510275, Peoples R China.
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- Mueller-Buschbaum, Peter (författare)
- Tech Univ Munich, Phys Dept, Lehrstuhl Funkt Mat, D-85748 Garching, Germany.;Tech Univ Munich, Heinz Maier Leibniz Zentrum MLZ, D-85748 Garching, Germany.
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- Roth, Stephan V. (författare)
- KTH,Fiber- och polymerteknologi,DESY, D-22607 Hamburg, Germany.
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DESY, D-22607 Hamburg, Germany;Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei 230026, Peoples R China. Teknisk mekanik (creator_code:org_t)
- 2021-01-06
- 2021
- Engelska.
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Ingår i: ACS Applied Nano Materials. - : American Chemical Society (ACS). - 2574-0970. ; 4:1, s. 503-513
- Relaterad länk:
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https://doi.org/10.1...
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https://pubs.acs.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Silver nanoparticles (AgNPs) and AgNP-based composite materials have attracted growing interest due to their structure-dependent optical, electrical, catalytic, and stimuli-responsive properties. For practical applications, polymeric materials are often combined with AgNPs to provide flexibility and offer a scaffold for homogenous distribution of the AgNPs. However, the control over the assembly process of AgNPs on polymeric substrates remains a big challenge. Herein, we report the fabrication of AgNP/cellulose nanofibril (CNF) thin films via layer-by-layer (LBL) spray-coating. The morphology and self-assembly of AgNPs with increasing number of spray cycles are characterized by atomic force microscopy (AFM), grazing-incidence small-angle X-ray scattering (GISAXS), and grazing-incidence wide-angle X-ray scattering (GIWAXS). We deduce that an individual AgNP (radius = 15 +/- 3 nm) is composed of multiple nanocrystallites (diameter = 2.4 +/- 0.9 nm). Our results suggest that AgNPs are assembled into large agglomerates on SiO2 substrates during spray-coating, which is disadvantageous for AgNP functionalization. However, the incorporation of CNF substrates contributes to a more uniform distribution of AgNP agglomerates and individual AgNPs by its network structure and by absorbing the partially dissolved AgNP agglomerates. Furthermore, we demonstrate that the spray-coating of the AgNP/CNF mixture results in similar topography and agglomeration patterns of AgNPs compared to depositing AgNPs onto a precoated CNF thin film. Contact-angle measurements and UV/vis spectroscopy suggest that the deposition of AgNPs onto or within CNFs could increase the hydrophilicity of AgNP-containing surfaces and the localized surface plasmon resonance (LSPR) intensity of AgNP compared to AgNPs sprayed on SiO(2 )substrates, suggesting their potential applications in antifouling coatings or label-free biosensors. Thereby, our approach provides a platform for a facile and scalable production of AgNP/CNF films with a low agglomeration rate by two different methods as follows: (1) multistep layer-by-layer (LBL) spray-coating and (2) direct spray-coating of the AgNP/CNF mixture. We also demonstrate the ability of CNFs as a flexible framework for directing the uniform assembly of AgNPs with tailorable wettability and plasmonic properties.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- silver nanoparticles
- self-assembly
- cellulose nanofibrils
- layer-by-layer deposition
- spray-coating
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Chen, Qing
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Brett, Calvin
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Chumakov, Andrei
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Gensch, Marc
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Schwartzkopf, Ma ...
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Koerstgens, Volk ...
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Söderberg, Danie ...
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Plech, Anton
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Zhang, Peng
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Mueller-Buschbau ...
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Roth, Stephan V.
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