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Issue 12, 2007
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SERS detection of environmental pollutants in humic acid–gold nanoparticle composite materials

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Abstract

Humic acid (HA) solutions provide an unexpected medium for direct fabrication of gold nanoparticles (HA–AuNP) and a clear window for surface-enhanced Raman scattering (SERS) with many potential applications in the ultrasensitive chemical analysis of environmental pollutants. It is demonstrated that the HA–AuNP fabrication can be easily achieved in a wide range of pH (2 to 12). The background SERS spectra of HA is relatively weak in absolute intensity, allowing the detection of the enhanced Raman signal from trace amount of contaminants. An in-situ approach is illustrated where the HA–AuNP fabrication is carried out with a HA solution containing the target pollutant. The technique may allow for the direct detection of organic pollutants present in the humic fraction of soil.

Graphical abstract: SERS detection of environmental pollutants in humic acid–gold nanoparticle composite materials

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Article information


Submitted
25 Jul 2007
Accepted
06 Sep 2007
First published
24 Sep 2007

Analyst, 2007,132, 1210-1214
Article type
Paper

SERS detection of environmental pollutants in humic acid–gold nanoparticle composite materials

R. A. Alvarez-Puebla, D. S. dos Santos, Jr. and R. F. Aroca, Analyst, 2007, 132, 1210
DOI: 10.1039/B711361G

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