Share This Article:

Different Interaction Mechanisms of Evaporated Porphyrin Films Exposed to NO2

Full-Text HTML XML Download Download as PDF (Size:3463KB) PP. 441-457
DOI: 10.4236/ampc.2018.811030    326 Downloads   557 Views Citations


In this work, metal free and zinc tetraphenylporphyrin films were employed as nitrogen dioxide (NO2) gas sensors. The films were vacuum evaporated and the sensor response was evaluated as changes in the optical absorption spectra, hydrophobic properties and conductivity at different gas concentrations. From UV-Vis results, important changes in the absorption peaks were observed after gas exposure. The morphology of the films before and after gas interaction was obtained by using scanning electron and atomic force microscopy. The films morphology showed a degradation after gas adsorption for the metal free system but gas entrapment for the zinc porphyrin film. In order to elucidate the gas adsorption phenomena, density functional theory calculations were also performed. Here, it was observed that the porphyrin chemical structure not only affects the gas coordination sites which affect the porphyrin electronic distribution and packing arrangement, but also, determines the gas detection mechanism for sensing applications.

Cite this paper

Rivera, M. , Rivera, M. , Rivera, J. , Amelines-Sarria, O. and Wang, Y. (2018) Different Interaction Mechanisms of Evaporated Porphyrin Films Exposed to NO2. Advances in Materials Physics and Chemistry, 8, 441-457. doi: 10.4236/ampc.2018.811030.

Copyright © 2019 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.