Title: Fabrication of Janus graphene hybrids with controlled structure and high stability

Authors: Yaling Li; Jiao Wu; Kun Qian; Jingjing Wan; Ying Wang; Baohong Liu; Xiaojing Zhang

Addresses: Center for Bio-Nano-Chips and Diagnostics in Translational Medicine, School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China ' Center for Bio-Nano-Chips and Diagnostics in Translational Medicine, School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China ' Center for Bio-Nano-Chips and Diagnostics in Translational Medicine, School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China ' Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry and Institute of Biomedical Science, Fudan University, 220 Handan Road, Shanghai 200433, China ' Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry and Institute of Biomedical Science, Fudan University, 220 Handan Road, Shanghai 200433, China ' Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry and Institute of Biomedical Science, Fudan University, 220 Handan Road, Shanghai 200433, China ' Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA

Abstract: Janus hybrids, the anisotropic materials, have displayed very strong potentials in diverse research fields like life science and photology due to their unique properties. In this study, using graphene as an efficient nanoparticles (NPs) carrier, we present the fabrication of two-dimensional (2D) Janus hybrids (gold NPs/graphene) superstructures through a rapid, solventless sputtering method in 10-30 seconds. The micropores in graphene (~0.5 nm) is much smaller than the sputtered gold NPs, which can allow the sheet material to mesh gold NPs in one side to form a Janus structure. The size and morphology of gold NPs can be fine controlled on graphene by adjusting the sputtering current and time, while the resulting graphene hybrids enjoy tunable NPs area density and desirable thermal stability. The performance of hybrids has also been explored through standard electrochemical experiments.

Keywords: graphene; gold; nanoparticle; hybrids; Janus; sputtering; size; stability; morphology; area density.

DOI: 10.1504/IJNM.2017.083851

International Journal of Nanomanufacturing, 2017 Vol.13 No.2, pp.139 - 151

Received: 20 Jan 2015
Accepted: 04 Jan 2016
Published online: 25 Apr 2017 *

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