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Infrared and Ultraviolet-visible Spectroscopic Studies of Plasma Polymerized 1, 1, 3, 3 - Tetramethoxypropane Thin Films by Tamanna Afroze; A.H. Bhuiyan is a Engineering article available to read on EtoBox.

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## UV-Vis spectroscopy Plasma polymerized 1, 1, 3, 3-tetramethoxy-propane (PPTMP) thin films of different thicknesses were prepared through glow discharge of 1, 1, 3, 3-tetramethoxypropane using a capacitively coupled reactor. The scanning electron micrographs show that as-deposited PPTMP thin films are smooth, uniform and pinhole free. Infrared spectroscopic investigation indicates the formation of conjugation along with C = O bonds in as deposited PPTMP thin films. Apart from aliphatic conjugation of C = C and C = O bonds there is formation of C-O-C bond owing to rearrangement of oxygen due to heat treatment of PPTMP thin films. A red shift in the maximum absorption wavelength of the ultra violet-visible spectra for all the PPTMP thin films is observed compared to the monomer maximum absorption wavelength. The absorption coefficient, allowed direct transition, E qd , allowed indirect transition and E qi , energy gaps were determined. The E qd and E qi are found to be about 2.92 to 3.16 eV and 0.80 to 1.53 eV respectively, for as deposited PPTMP samples of different thicknesses. The E qi of two samples of different thicknesses heat treated at 673 K for 1 hour is 0.55 and 0.65 eV .

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Author

Tamanna Afroze; A.H. Bhuiyan

Publisher

Elsevier Science; Elsevier ; Elsevier Sequoia; Elsevier BV (ISSN 0040-6090)

Published

2011

Language

EN

Field

Engineering (Physical Sciences)