Surface Enhanced Raman Spectroscopic Detection of Heavy Metal Ions

Chem. J. Chinese Universities

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Surface Enhanced Raman Spectroscopic Detection of Heavy Metal Ions

YUAN Ya-Xian, MA Jun-Yin, WANG Mei, YAO Jian-Lin, GU Ren-Ao

Department of Chemistry, Suzhou University, Suzhou 215006, China

Received:2006-03-14 Revised:1900-01-01 Online:2006-11-10 Published:2006-11-10
Contact: YAO Jian-Lin

Abstract

Abstract: The mercaptobenzoic acid (MBA) was served as the self-assemble modified and Raman-labeled molecules for the modification on a smooth gold surface and gold nanoparticles by self assemble monolayer method. By the interaction between heavy metal ions and the carboxyl groups from MBA attached to the gold surface and gold nanoparticles, the sandwich structure of "modified gold ubstrate/heavy metal ion/modified gold nanoparticles" was built for detection. The observation of nanoparticles in SEM images and the detection of surface enhanced Raman spectroscopy(SERS) of MBA in the sandwich structure indicated the existence of heavy metal ions in the solution. By using the strong chelation of EDTA with metal ions, the sandwich structure was immersed into EDTA solution to remove the heavy metal ions and the nanoparticles to obtain a fresh MBA modified gold substrate for the cyclic detection.

Key words: Heavy metal ion, Mercaptobenzoic acid, Surface enhanced Raman spectroscopy, Gold nanoparticles

CLC Number:

O647

TrendMD:

YUAN Ya-Xian, MA Jun-Yin, WANG Mei, YAO Jian-Lin, GU Ren-Ao. Surface Enhanced Raman Spectroscopic Detection of Heavy Metal Ions[J]. Chem. J. Chinese Universities, doi: .

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Surface Enhanced Raman Spectroscopic Detection of Heavy Metal Ions

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