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SERS and FDTD simulation of gold nanoparticles grafted on germanium wafer via galvanic displacement
Author(s) -
Zhang Zhaoshun,
Liao Fan,
Ma Shuzhen,
Gao Suning,
Shao Mingwang
Publication year - 2015
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5727
Subject(s) - rhodamine 6g , galvanic cell , materials science , raman scattering , reproducibility , finite difference time domain method , wafer , nanoparticle , germanium , substrate (aquarium) , aqueous solution , raman spectroscopy , electric field , nanotechnology , analytical chemistry (journal) , optoelectronics , silicon , chemistry , optics , chromatography , molecule , physics , metallurgy , oceanography , organic chemistry , quantum mechanics , geology
Uniform and dense Au nanoparticles grown on Ge (Au/Ge) were fabricated by a facile galvanic displacement method and employed as surface‐enhanced Raman scattering (SERS) substrates. The substrates exhibited excellent reproducibility in the detection of rhodamine 6G aqueous solution with a relative standard deviation of <20%. The substrate showed a high Raman enhancement factor of 3.44 × 10 6 . This superior SERS sensitivity was numerical confirmed by the three‐dimensional finite‐difference time‐domain method, which demonstrated a stronger electric field intensity (| E / E 0 | 2 ) distribution around the Au nanoparticles grown on Ge. This facile and low‐cost prepared Au/Ge substrate with high SERS sensitivity and reproducibility might have potential applications in monitoring in situ reaction in aqueous solution. Copyright © 2014 John Wiley & Sons, Ltd.
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