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    Langmuir-Blodgett assembly of transparent graphene oxide-silver microwire hybrid films with an antibacterial property

    Year: 2017

    Journal: New Carbon Mater., Volume 32, AUG, page 344–351

    Authors: Shi Li-fang; Liu Jun-zhe; Yang Jun-he; Cai Ling-fei; Shi Li-yun; Qiu Han-xun

    Organizations: NSFC [51102170, 51272157]; Shanghai Pujiang Talent Project [13PJ1406400]; China Postdoctoral Science Foundation [2012M520912]; Shanghai Postdoctoral Science Foundation [13R21415500]; Shanghai Committee of Science and Technology [15JC1490700]

    Keywords: Graphene oxide; Ag MW; E. coli; Transparent; Antibacterial

    Silver microwires (AgMWs) were made amphiphilic by non-covalent functionalization with poly (vinyl pyrrolidone) and hexadecyl mercaptan. The Langmuir-Blodgett (LB) technique was used to transfer graphene oxide (GO) and the functionalized AgMWs (F-AgMWs) onto a quartz substrate to obtain GO-AgMW hybrid films. The films had a high optical transparency and an antibacterial property against Escherichia coli (E. coli). It is proposed that the GO layer not only acts as an adhesive layer for AgMWs, but also is acidic, which provides an ideal reaction condition for AgMWs to release the Ag+ ions that fight E. coli. The influence of pH value on the antibacterial property of the hybrid films was investigated in order to verify the proposed mechanism. Further development of this method may provide a way to produce next generation transparent multifunctional thin films with antibacterial properties.
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