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Copper Nanoparticles Grafted on a Silicon Wafer and Their Excellent Surface‐Enhanced Raman Scattering
Author(s) -
Shao Qi,
Que Ronghui,
Shao Mingwang,
Cheng Liang,
Lee ShuitTong
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201102943
Subject(s) - materials science , wafer , raman scattering , copper , rhodamine 6g , silicon , nanoparticle , raman spectroscopy , nanotechnology , optoelectronics , chemical engineering , analytical chemistry (journal) , optics , metallurgy , chromatography , fluorescence , physics , engineering , chemistry
Copper nanoparticles grafted on a silicon wafer are fabricated by reducing copper ions with silicon–hydrogen bonds and assembling them in situ on the Si wafer. The nanoparticles, with an average size of 20 nm, grow uniformly and densely on the Si wafer, and they are used as substrates for surface‐enhanced Raman scattering. These substrates exhibit excellent enhancement in the low concentration detection (1 × 10 −9 M ) of rhodamine 6G with an enhancement factor (EF) of 2.29 × 10 7 and a relative standard deviation (RSD) of <20%. They are also employed to detect sudan‐I dye with distinguished sensitivity and uniformity. The results are interesting and significant because Cu substrates are otherwise thought to be poor. These effects might provide new ways to think about surface‐enhanced Raman scattering based on Cu substrates.