Journal
OPTICAL REVIEW
Volume 20, Issue 5, Pages 361-366Publisher
OPTICAL SOC JAPAN
DOI: 10.1007/s10043-013-0065-7
Keywords
Ag nanoparticles; self-assembled substrate; surface enhanced Raman scattering
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Funding
- National Science Foundation of China [10974183, 11104252]
- Ministry of Education of China [20114101110003]
- Science and Technology innovation team of Zhengzhou [2011-03]
- Science and Technology Program of Henan Province [112102310543, 122300410162]
- Natural Science Foundation of Henan Educational Committee [12A140002]
- Fudan University [KL2011-01]
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Uniform and reproducible substrates for surface enhanced Raman scattering (SERS) are fabricated by self-assembly of Ag nanoparticles (NPs) on 3-aminopropyltrimethoxysilane (APTES) modified glass. Experimental results indicate that the Ag NPs with a narrow size distribution were assembled as a sub-monolayer which exhibits an excellent SERSactivity. The SERS enhancement factor is estimated to be 7.5 x 10(6) and the detection limit for crystal violet (CV) solution is about similar to 10(-11) M. The uniformity and reproducibility of the SERS signals are tested by point-to-point and batch-to-batch measurements. It is confirmed that the self-assembled Ag NPs substrates has a high SERS reproducibility and a low standard deviation with respect to the Ag NPs on non-functionalized glass substrates. The self-assembled Ag NPs substrates can be widely used for the application of chemical and biochemical sensing. (C) 2013 The Japan Society of Applied Physics
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