TY - GEN
T1 - Investigation of thermal and methanol-vapor treatments for MgTPP as an optical gas sensor
AU - Kladsomboon, Sumana
AU - Pratontep, Sirapat
AU - Puntheeranurak, Theerapom
AU - Kerdcharoen, Teerakiat
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - Artificial olfaction
KW - Chemical sensor
KW - Gas sensor
KW - Porphyrin
UR - https://www.scopus.com/pages/publications/70349679328
U2 - 10.1109/NEMS.2009.5068707
DO - 10.1109/NEMS.2009.5068707
M3 - Conference contribution
AN - SCOPUS:70349679328
SN - 9781424446308
T3 - 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009
SP - 843
EP - 847
BT - 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009
T2 - 4th IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS 2009
Y2 - 5 January 2009 through 8 January 2009
ER -