Shelled-isolated nanoparticle-enhanced Raman spectroscopy

  title={Shelled-isolated nanoparticle-enhanced Raman spectroscopy},
  author={Jian Feng Li and Yi Fan Huang and Yong Ding and Song Bo Li and Zhi Lin Yang and Xiao Shun Zhou and Feng Ru Fan and Wei Zhang and Zhi You Zhou and De Yin Wu and Bin R{\'e}n and Zhong Lin Wang and Zhong Qun Tian},
S1. Supplementary Methods S1.1. Preparation of Au@SiO2 core-shell NPs We first synthesized Au NPs with a diameter of about 55 nm as cores by a standard sodium citrate reduction method. A freshly prepared aqueous solution of 1 mM (3-Aminopropyl) trimethoxysilane (APS) was added to the gold sol under vigorous magnetic stirring in 15 min, ensuring complete complexation of the amine groups with the gold surface. Then a 0.54 wt% sodium silicate solution was added to the sol, again under vigorous… CONTINUE READING


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