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Gold nanoparticles-peptide based gas sensor arrays for the detection of food aromas.
MedLine Citation:
PMID:  23261699     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A gas sensor array based on peptide modified gold nanoparticles deposited onto 20MHz quartz crystal microbalances has been realized. Glutathione and its constituting aminoacids and dipeptides have been used as ligands. A great increase in sensitivity (2 orders of magnitude) was achieved using gold nanoparticles versus monolayer modified QCMs. The sensors have been charachterised in terms of sensitivity for hexane, water, trimethylammine and ethanol. Highest sensitivity was found for water. The ability to discriminate typical food aromas as cis-3-hexenol, isopentylacetate, ethylacetate, and terpinen-4-ol dissolved in different solvents was studied using a gas sensor array constituted by gold nanoparticles modified with the glutathione peptides, thioglycolic acid and an heptapeptide. The array was found able to discriminate the food aromas, the response being dependent on the polarity of the solvent used. Tests on real olive oil samples gave a satisfactory separation among samples having defects versus non defected samples demonstrating that this approach has high potential for the development of gas sensor arrays to be used in real samples.
Authors:
D Compagnone; G C Fusella; M Del Carlo; P Pittia; E Martinelli; L Tortora; R Paolesse; C Di Natale
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-22
Journal Detail:
Title:  Biosensors & bioelectronics     Volume:  42C     ISSN:  1873-4235     ISO Abbreviation:  Biosens Bioelectron     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-12-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9001289     Medline TA:  Biosens Bioelectron     Country:  -    
Other Details:
Languages:  ENG     Pagination:  618-625     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Affiliation:
Department of Food Sciences, University of Teramo, via C. Lerici 1, Mosciano S.A. 64023, Italy. Electronic address: dcompagnone@unite.it.
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