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6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends

The objective of the work is to study the effect of photon on the optical properties of dyed polyvinyl alcohol-trichloroacetic acid (PVA-TCA) blends prepared through solvent casting technique at radiotherapy dose. The films were cut into 2 × 2 cm2 and kept away from direct sunlight at room temperatu...

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Main Authors: Mustafa, Iskandar Shahrim, Megat Azman, Norhanisah, Abdul Rahman, Azhar, Ramli, Ramzun Maizan, Mohamed Kamari, Halimah
Format: Article
Language:English
English
Published: Penerbit Universiti Sains Malaysia 2013
Online Access:http://psasir.upm.edu.my/id/eprint/30248/1/6%20MV%20photon%20beam%20induced%20optical%20properties%20of%20dyed%20polyvinyl%20alcohol.pdf
http://psasir.upm.edu.my/id/eprint/30248/
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spelling my.upm.eprints.302482015-10-07T08:49:56Z http://psasir.upm.edu.my/id/eprint/30248/ 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends Mustafa, Iskandar Shahrim Megat Azman, Norhanisah Abdul Rahman, Azhar Ramli, Ramzun Maizan Mohamed Kamari, Halimah The objective of the work is to study the effect of photon on the optical properties of dyed polyvinyl alcohol-trichloroacetic acid (PVA-TCA) blends prepared through solvent casting technique at radiotherapy dose. The films were cut into 2 × 2 cm2 and kept away from direct sunlight at room temperature until irradiation process. The films were simultaneously irradiated with a 6 MV photon beam produced by linear accelerator Siemens MXE-2. The dose exposure given was set from 50 to 400 cGy. The optical properties were measured using the UV-visible spectrophotometer Shimadzu-1800, set at a wavelength range between 200 nm and 800 nm. The absorbance spectra were obtained with the existence of three absorbance band peaks at 273 nm, 444 nm and 582 nm. Initially, all absorbance increased with increasing dose applied. The results gained indicate that the optical energy band gap, Eg is equivalent to 5.20 eV while the absorption edge is 4.96 eV. These two parameters decreased with increasing dose. It is due to the increase of structural order between the conduction band and the valence band getting narrower. This also indicates that the film is undergoing a red shift. Hence, the value of Urbach energy, ΔE obtained is 0.089 eV, which increased with increasing dose since the lattice vibration depended on the applied dose. In conclusion, the PVA/TCA blends have a good optical characteristic in terms of dose response and optical transition. Penerbit Universiti Sains Malaysia 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30248/1/6%20MV%20photon%20beam%20induced%20optical%20properties%20of%20dyed%20polyvinyl%20alcohol.pdf Mustafa, Iskandar Shahrim and Megat Azman, Norhanisah and Abdul Rahman, Azhar and Ramli, Ramzun Maizan and Mohamed Kamari, Halimah (2013) 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends. Journal of Engineering Science, 9. pp. 61-69. ISSN 1823-3430; ESSN: 2180-4214 http://web.usm.my/jes/9_2013.html English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The objective of the work is to study the effect of photon on the optical properties of dyed polyvinyl alcohol-trichloroacetic acid (PVA-TCA) blends prepared through solvent casting technique at radiotherapy dose. The films were cut into 2 × 2 cm2 and kept away from direct sunlight at room temperature until irradiation process. The films were simultaneously irradiated with a 6 MV photon beam produced by linear accelerator Siemens MXE-2. The dose exposure given was set from 50 to 400 cGy. The optical properties were measured using the UV-visible spectrophotometer Shimadzu-1800, set at a wavelength range between 200 nm and 800 nm. The absorbance spectra were obtained with the existence of three absorbance band peaks at 273 nm, 444 nm and 582 nm. Initially, all absorbance increased with increasing dose applied. The results gained indicate that the optical energy band gap, Eg is equivalent to 5.20 eV while the absorption edge is 4.96 eV. These two parameters decreased with increasing dose. It is due to the increase of structural order between the conduction band and the valence band getting narrower. This also indicates that the film is undergoing a red shift. Hence, the value of Urbach energy, ΔE obtained is 0.089 eV, which increased with increasing dose since the lattice vibration depended on the applied dose. In conclusion, the PVA/TCA blends have a good optical characteristic in terms of dose response and optical transition.
format Article
author Mustafa, Iskandar Shahrim
Megat Azman, Norhanisah
Abdul Rahman, Azhar
Ramli, Ramzun Maizan
Mohamed Kamari, Halimah
spellingShingle Mustafa, Iskandar Shahrim
Megat Azman, Norhanisah
Abdul Rahman, Azhar
Ramli, Ramzun Maizan
Mohamed Kamari, Halimah
6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
author_facet Mustafa, Iskandar Shahrim
Megat Azman, Norhanisah
Abdul Rahman, Azhar
Ramli, Ramzun Maizan
Mohamed Kamari, Halimah
author_sort Mustafa, Iskandar Shahrim
title 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
title_short 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
title_full 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
title_fullStr 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
title_full_unstemmed 6 MV photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
title_sort 6 mv photon beam induced optical properties of dyed polyvinyl alcohol/trichloroacetic acid blends
publisher Penerbit Universiti Sains Malaysia
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/30248/1/6%20MV%20photon%20beam%20induced%20optical%20properties%20of%20dyed%20polyvinyl%20alcohol.pdf
http://psasir.upm.edu.my/id/eprint/30248/
http://web.usm.my/jes/9_2013.html
_version_ 1643830001542365184
score 13.211869

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