Please use this identifier to cite or link to this item: https://ir.sc.mahidol.ac.th/handle/123456789/739
Title: Investigation of thermal and methanol-vapor treatments for MgTPP as an optical gas sensor
Authors: Theeraporn Puntheeranurak
Keywords: Artificial olfaction;Chemical sensor;Gas sensor;Porphyrin
Issue Date: 2009
Publisher: 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009
Citation: ชีววิทยา
Series/Report no.: ;843-847
Abstract: In this paper, we have investigated the sensing properties of magnesium - 5,10,15,20 - tetraphenyl - porphyrin (MgTPP) to various volatile organic compounds (VOCs). The spin-coated MgTPP thin films were subjected to thermal annealing and methanol-vapor exposure to study the effects of pre-treatment on the sensing properties. Atomic force microscopy (AFM) has shown that both pre-treatment techniques have induced re-crystallization of the film, thereby improving the sensitivity over the as-deposited film. The thermally annealed films were found more effective than the methanol-vapor treated ones. The in-house optical sensor setup was applied to discriminate various VOCs and alcoholic beverages. Principal component analysis (PCA) confirms that the thermally annealed MgTPP thin film can distinguish several kinds of VOCs. Computational density functional theory (DFT) indicates that the interaction energy between analyte and sensing molecules can be used to explain comparative sensitivity.
Description: Scopus
URI: https://ir.sc.mahidol.ac.th/handle/123456789/739
ISSN: 978-142444630-8
Appears in Collections:Biology: International Proceedings

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