Bi-SERS sensing and enhancement by Au-Ag bimetallic non-alloyed nanoparticles on amorphous and crystalline silicon substrate.
作者： Chee Leong Tan , Soo Kyung Lee , Yong Tak Lee
DOI: 10.1364/OE.23.006254
关键词:
摘要: We have demonstrated Au-Ag bimetallic non-alloy nanoparticles (BNNPs) on thin a-Si film and c-Si substrate for high SERS enhancement, low cost, sensitivity reproducible with bi-SERS sensing properties where two different peak Au NPs Ag are observed single substrate. The isolated NPs, uniform size spacing distribution, suitable density hotspot enhancement. enhancement factor of BNNPs is 2.9 times higher compared to similar substrates due the increase localized surface plasmon resonance effect. However there a decrement intensity at specific wavenumbers when surrounding refractive index increases out-phase hybridization NPs. distinct changes peaks independently show possible application bi-molecular sensing.
osapublishing.org
harvard.edu参考文章(25)
Jeffrey N. Anker, W. Paige Hall, Olga Lyandres, Nilam C. Shah, Jing Zhao, Richard P. Van Duyne, Biosensing with plasmonic nanosensors Nature Materials. ,vol. 7, pp. 442- 453 ,(2008) , 10.1038/NMAT2162
Z. Y. Jiang, X. X. Jiang, S. Su, X. P. Wei, S. T. Lee, Y. He, Silicon-based reproducible and active surface-enhanced Raman scattering substrates for sensitive, specific, and multiplex DNA detection Applied Physics Letters. ,vol. 100, pp. 203104- ,(2012) , 10.1063/1.3701731
Harry A. Atwater, Albert Polman, Plasmonics for improved photovoltaic devices Nature Materials. ,vol. 9, pp. 205- 213 ,(2010) , 10.1038/NMAT2629
Howard R. Stuart, Dennis G. Hall, Island size effects in nanoparticle-enhanced photodetectors Applied Physics Letters. ,vol. 73, pp. 3815- 3817 ,(1998) , 10.1063/1.122903
Yao He, Chunhai Fan, Shuit-Tong Lee, Silicon nanostructures for bioapplications Nano Today. ,vol. 5, pp. 282- 295 ,(2010) , 10.1016/J.NANTOD.2010.06.008
Chad E. Talley, Joseph B. Jackson, Chris Oubre, Nathaniel K. Grady, Christopher W. Hollars, Stephen M. Lane, Thomas R. Huser, Peter Nordlander, Naomi J. Halas, Surface-enhanced Raman scattering from individual au nanoparticles and nanoparticle dimer substrates. Nano Letters. ,vol. 5, pp. 1569- 1574 ,(2005) , 10.1021/NL050928V
Benito Rodríguez-González, Andrew Burrows, Masashi Watanabe, Christopher J. Kiely, Luis M. Liz Marzán, Multishell bimetallic AuAg nanoparticles: synthesis, structure and optical properties Journal of Materials Chemistry. ,vol. 15, pp. 1755- 1759 ,(2005) , 10.1039/B500556F
Emil Prodan, Corey Radloff, Naomi J Halas, Peter Nordlander, A hybridization model for the plasmon response of complex nanostructures. Science. ,vol. 302, pp. 419- 422 ,(2003) , 10.1126/SCIENCE.1089171
Jing Tang, Fung Suong Ou, Huei Pei Kuo, Min Hu, William F. Stickle, Zhiyong Li, R. Stanley Williams, Silver-coated Si nanograss as highly sensitive surface-enhanced Raman spectroscopy substrates Applied Physics A. ,vol. 96, pp. 793- 797 ,(2009) , 10.1007/S00339-009-5305-0
K. R. Catchpole, A. Polman, Plasmonic solar cells Optics Express. ,vol. 16, pp. 21793- 21800 ,(2008) , 10.1364/OE.16.021793