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J Nanosci Nanotechnol

Title:		"An artificial nose based on M-porphyrin (M = Mg, Zn) thin film and optical spectroscopy"
Author(s):		Kladsomboon S; Pratontep S; Puntheeranurak T; Kerdcharoen T;
Address:		"Department of Physics, Center of Nanoscience, Faculty of Science, Mahidol University, Bangkok 10400, Thailand"
Journal Title:		J Nanosci Nanotechnol
Year:		2011
Volume:		11
Issue:		12
Page Number:		10589 - 10594
DOI:		10.1166/jnn.2011.4048
ISSN/ISBN:		1533-4880 (Print) 1533-4880 (Linking)
Abstract:		"Artificial nose has recently become an emerging instrument for quality assurance in the food industry. These paper present the optical gas sensors based on Magnesium-5, 10, 15, 20-tetra phenyl-porphyrin (MgTPP) and Zinc-5, 10, 15, 20-tetra phenyl-porphyrin (ZnTPP) thin films and their application as an artificial nose. Based on the measurement of optical absorbance response using a general UV-Vis spectroscopy, this artificial nose was tested to discriminate various volatile organic compounds (VOCs) and Thai beverages. Atomic force microscopy (AFM) and X-rays diffraction (XRD) were used to confirm the polycrystalline structure of the sensing materials. Density functional theory (DFT) calculations reveal that MgTPP interacts more strongly with the VOCs than ZnTPP, especially with methanol. The classification results of VOCs and Thai beverage vapors using the principal component analysis indicate that both MgTPP and ZnTPP-based artificial noses can be an efficient tool for quality assurance of alcoholic beverages"
Keywords:
Notes:		"PubMed-not-MEDLINEKladsomboon, Sumana Pratontep, Sirapat Puntheeranurak, Theeraporn Kerdcharoen, Teerakiat eng 2012/03/14 J Nanosci Nanotechnol. 2011 Dec; 11(12):10589-94. doi: 10.1166/jnn.2011.4048"