Document Detail


Use of a fractal-like gold nanostructure in surface-enhanced raman spectroscopy for detection of selected food contaminants.
MedLine Citation:
PMID:  18828599     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The safety of imported seafood products because of the contamination of prohibited substances, including crystal violet (CV) and malachite green (MG), raised a great deal of concern in the United States. In this study, a fractal-like gold nanostructure was developed through a self-assembly process and the feasibility of using surface-enhanced Raman spectroscopy (SERS) coupled with this nanostructure for detection of CV, MG, and their mixture (1:1) was explored. SERS was capable of characterizing and differentiating CV, MG, and their mixture on fractal-like gold nanostructures quickly and accurately. The enhancement factor of the gold nanostructures could reach an impressive level of approximately 4 x 10(7), and the lowest detectable concentration for the dye molecules was at approximately 0.2 ppb level. These results indicate that SERS coupled with fractal-like gold nanostructures holds a great potential as a rapid and ultra-sensitive method for detecting trace amounts of prohibited substances in contaminated food samples.
Authors:
Lili He; Nam-Jung Kim; Hao Li; Zhiqiang Hu; Mengshi Lin
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Publication Detail:
Type:  Evaluation Studies; Journal Article     Date:  2008-10-02
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  56     ISSN:  1520-5118     ISO Abbreviation:  J. Agric. Food Chem.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-07     Completed Date:  2008-12-31     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9843-7     Citation Subset:  IM    
Affiliation:
Food Science Program, Division of Food Systems and Bioengineering, University of Missouri, Columbia, Missouri 65211, USA.
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MeSH Terms
Descriptor/Qualifier:
Food Contamination / analysis*
Gentian Violet / analysis*
Gold / chemistry
Rosaniline Dyes / analysis*
Sensitivity and Specificity
Spectrum Analysis, Raman / methods*
Chemical
Reg. No./Substance:
0/Rosaniline Dyes; 10309-95-2/malachite green; 548-62-9/Gentian Violet; 7440-57-5/Gold

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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