Issue 6, 2010

Sensing of polycyclic aromatic hydrocarbons with cyclodextrin inclusion complexes on silver nanoparticles by surface-enhanced Raman scattering

Abstract

We have developed a new type of surface-enhanced Raman scattering (SERS) substrate that consists of per-6-deoxy-(6-thio)-β-cyclodextrin (CD-SH) modified by silver nanoparticles (AgNPs) for sensing of polycyclic aromatic hydrocarbons (PAHs), a kind of environmental pollutant, with very low affinity to metallic surfaces. The designed system can induce some PAH molecules (anthracene and pyrene) to insert into the hydrophobic cavity of β-CD, which enables one to detect SERS of PAHs because the analytes are very close to the AgNPs surface, which is the zone of electromagnetic enhancement. The measured spectra can easily distinguish the two kinds of PAH compounds in a mixture by their own characteristic peaks. In addition, we carried out selective detection of PAHs by SERS of the inclusion complexes with different concentrations in the presence of CD-SH functionalized AgNPs. Moreover, this sensing platform has been applied to quantitative detection of PAH in a mixture consisting of anthracene and pyrene. The CD molecule has the feature of high selectivity due to its size of cavity, significantly enhancing the sensitivity of the system after CD-SH adsorbs on AgNPs via the terminal thiol. This proposed method for the detection of PAHs holds great potential in environmental analytical chemistry.

Graphical abstract: Sensing of polycyclic aromatic hydrocarbons with cyclodextrin inclusion complexes on silver nanoparticles by surface-enhanced Raman scattering

Article information

Article type
Paper
Submitted
09 Feb 2010
Accepted
23 Mar 2010
First published
19 Apr 2010

Analyst, 2010,135, 1389-1394

Sensing of polycyclic aromatic hydrocarbons with cyclodextrin inclusion complexes on silver nanoparticles by surface-enhanced Raman scattering

Y. Xie, X. Wang, X. Han, X. Xue, W. Ji, Z. Qi, J. Liu, B. Zhao and Y. Ozaki, Analyst, 2010, 135, 1389 DOI: 10.1039/C0AN00076K

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