CUI Shao-hui, FU Ting-zhao, WANG Huan etc. Surface-enhanced Raman Scattering Based on Silicon Nanostructures[J]. Chinese Journal of Luminescence, 2018,39(4): 481-487
CUI Shao-hui, FU Ting-zhao, WANG Huan etc. Surface-enhanced Raman Scattering Based on Silicon Nanostructures[J]. Chinese Journal of Luminescence, 2018,39(4): 481-487 DOI: 10.3788/fgxb20183904.0481.
Surface-enhanced Raman Scattering Based on Silicon Nanostructures
In order to achieve high-sensitivity surface-enhanced Raman scattering(SERS) at a low cost
a kind of SERS substrate based on the nanostructures of silicon was fabricated. The monocrystalline silicon was treated with low-energy reactive ion implantation. Highly steep nanostructures were fabricated on the surface of the monocrystalline silicon. Then the treated silicon was decorated with silver employing the way of electron beam evaporation. Ag nanoparticles and hot spots formed on the side walls of nanostructures. The substrates with 40 nm-thickness silver obtain the most powerful Raman signal and reach a limit of 10
-14
mol/L by employing the R6G as the probe molecule. We also analyze the stability and repeatability of the substrates. The characteristic peaks located at 614 cm
-1
and 1 650 cm
-1
own relative standard deviation of 12.3% and 14.3%
respectively. The substrates can obtain the characteristic signal of R6G as well after a month. This method is simple and cost-effective and the demonstrated SERS substrates offer the advantages of high-sensitivity
high-repeatability and high-stability.
关键词
Keywords
references
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