In this work, we proposed a novel three-dimensional (3D) plasmonic nanostructure based on porous graphene/nickel foam (GNF) and gas-phase deposited Ag nanoparticles (NPs). Ag NPs with high density were directly deposited on the surface of 3D GNF by performing a novel cluster beam deposition approach. In comparison with traditional Ag substrate (SiO2/Ag), such hot-spots enriched 3D nanostructure showed extremely high electromagnetic field enhancement under incident light irradiation which could be used as a sensitive chemical sensor based on surface enhanced Raman scattering (SERS). The experimental results demonstrated that the proposed nanostructure showed superior SERS performance in terms of Raman signal reproducibility and sensitivity for the probe molecules. 3D full-wave simulation showed that the enhanced SERS performance in this 3D hierarchical plasmonic nanostructure was mainly obtained from the hot-spots between Ag NPs and the near-field coupling between Ag NPs and GNF scaffolds. This work can provide a novel assembled SERS substrate as a SERS-based chemical sensor in practical applications.
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April 2019
Research Article|
April 01 2019
Gas-phase deposited plasmonic nanoparticles supported on 3D-graphene/nickel foam for highly SERS detection†
Peng Mao;
Peng Mao
*
a
College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications
, Nanjing 210023, China
b
School of Physics and Astronomy, University of Birmingham
, B15 2TT, United Kingdom
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Qiang Chen;
Qiang Chen
*
c
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Centre of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Guang-hou Wang;
Guang-hou Wang
c
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Centre of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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Min Han
Min Han
c
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Centre of Advanced Microstructures, Nanjing University
, Nanjing 210093, China
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†
Part of the special issue for “the 19th International Symposium on Small Particles and Inorganic Clusters”.
Chin. J. Chem. Phys. 32, 200–206 (2019)
Article history
Received:
December 28 2018
Accepted:
March 21 2019
Citation
Peng Mao, Qiang Chen, Guang-hou Wang, Min Han; Gas-phase deposited plasmonic nanoparticles supported on 3D-graphene/nickel foam for highly SERS detection. Chin. J. Chem. Phys. 1 April 2019; 32 (2): 200–206. https://doi.org/10.1063/1674-0068/cjcp1812294
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