The production of graphene nanosheets decorated with silver nanoparticles for use in transparent, conductive films |
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Authors: | Hsi-Wen Tien Yuan-Li Huang Shin-Yi Yang Jen-Yu Wang Chen-Chi M Ma |
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Affiliation: | Department of Chemical Engineering, National Tsing-Hua University, Hsin-Chu 30043, Taiwan |
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Abstract: | Aggregation and restacking of graphene nanosheets (GNS) can be efficiently inhibited by decorating the silver nanoparticles on the surface of GNS to form GNS/silver (GNS-Ag) composites, which can construct high transparent and electrically conductive thin films. Silver nanoparticles act as a useful nanospacer and conductor, which not only increase the interlayer distance but also improve the electrical conductivity between layers. A two-step reduction process using sodium borohydride and ethylene glycol was also demonstrated reducing graphene oxide to GNS efficiently. The GNS-Ag composite films showed a maximum sheet resistance of 93 Ω□−1, while maintaining up to 78% light transmittance, which was two order of magnitude lower than that of GNS (8.2 × 103 Ω□−1, 81%), and the value of DC conductivity to optical conductivity ratio was 13.5 instead of 0.25. |
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