Inorg. Chem., 47 (8), 2934–2936, 2008. 10.1021/ic800122v
Web Release Date: March 26, 2008

Copyright © 2008 American Chemical Society

Ultrasensitive SERS Nanoprobes for Hazardous Metal Ions Based on Trimercaptotriazine-Modified Gold Nanoparticles

Vitor M. Zamarion, Ronaldo A. Timm, Koiti Araki, and Henrique E. Toma*

Instituto de Quimica, Universidade de São Paulo, Caixa Postal 26077, CEP 05513-970 São Paulo, São Paulo, Brazil

Received January 22, 2008

Abstract:

Trimercaptotriazine-modified gold nanoparticles exhibit strong SERS effects,1 yielding vibrational profiles very sensitive to the presence of heavy metal ions. Because of the contrasting response observed for selected vibrational bands in the SERS profiles, they provide useful nanoprobes for Hg2+ and Cd2+ ions, allowing direct quantitative assays by employing relative peak intensity ratios instead of using internal standards.

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