期刊
NANOSCALE
卷 4, 期 3, 页码 860-863出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nr10997a
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- CREATE from NRF in Singapore
The Raman signal of adsorbed molecules can be significantly enhanced by utilizing metallic structures with high-density Raman hot spots used as surface enhanced Raman scattering (SERS) substrates. In this work, we develop a simple, convenient and tunable method to fabricate high-density Ag or Au nanogaps on Si wafers. These nanogaps can serve as Raman hot spots, leading to dramatic enhancement of the Raman signal. The high-density nanogaps can be formed by repeating the electroless deposition of Ag NPs (or Au NPs) and coating of p-aminothiophenol (PATP, a Raman probe) on the deposited Ag NPs (or Au NPs) through the self-assembly process. After removal of PATP by O-2 plasma, the as-fabricated SERS substrate can be reused for the detection of other molecules.
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