Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations
There are numerous applications for thin films based chemical pH sensors, in such areas as biomedical, military, environmental, food, and consumer products. pH sensitive films fabricated through the ionic self-assembled monolayers technique were made of polyelectrolyte polyallylamine hydrochloride a...
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2019-12-01
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doaj-bc7f11ba60b540ae92bf70a9b81dde912020-11-25T02:47:37ZengMDPI AGCoatings2079-64122019-12-011011810.3390/coatings10010018coatings10010018Response of Optically Transparent pH Sensing Films to Temperature and Temperature VariationsDaniela M. Topasna0Gregory A. Topasna1Department of Physics and Astronomy, Virginia Military Institute, Lexington, VA 24450, USADepartment of Physics and Astronomy, Virginia Military Institute, Lexington, VA 24450, USAThere are numerous applications for thin films based chemical pH sensors, in such areas as biomedical, military, environmental, food, and consumer products. pH sensitive films fabricated through the ionic self-assembled monolayers technique were made of polyelectrolyte polyallylamine hydrochloride and the water-soluble organic dye molecule Direct Yellow 4. The films were monitored in various environmental conditions and for selected periods, at temperatures varying between −13.7 and 46.2 °C. Absorbance measurements and atomic force microscopy performed before and after thermal treatment indicate that for optimized thickness and composition the films maintain their functionality and are not affected by long-term exposure at these temperatures.https://www.mdpi.com/2079-6412/10/1/18thin filmsoptical ph sensorsionic self-assembled monolayerlayer-by-layer assemblydyes |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Daniela M. Topasna Gregory A. Topasna |
spellingShingle |
Daniela M. Topasna Gregory A. Topasna Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations Coatings thin films optical ph sensors ionic self-assembled monolayer layer-by-layer assembly dyes |
author_facet |
Daniela M. Topasna Gregory A. Topasna |
author_sort |
Daniela M. Topasna |
title |
Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations |
title_short |
Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations |
title_full |
Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations |
title_fullStr |
Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations |
title_full_unstemmed |
Response of Optically Transparent pH Sensing Films to Temperature and Temperature Variations |
title_sort |
response of optically transparent ph sensing films to temperature and temperature variations |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2019-12-01 |
description |
There are numerous applications for thin films based chemical pH sensors, in such areas as biomedical, military, environmental, food, and consumer products. pH sensitive films fabricated through the ionic self-assembled monolayers technique were made of polyelectrolyte polyallylamine hydrochloride and the water-soluble organic dye molecule Direct Yellow 4. The films were monitored in various environmental conditions and for selected periods, at temperatures varying between −13.7 and 46.2 °C. Absorbance measurements and atomic force microscopy performed before and after thermal treatment indicate that for optimized thickness and composition the films maintain their functionality and are not affected by long-term exposure at these temperatures. |
topic |
thin films optical ph sensors ionic self-assembled monolayer layer-by-layer assembly dyes |
url |
https://www.mdpi.com/2079-6412/10/1/18 |
work_keys_str_mv |
AT danielamtopasna responseofopticallytransparentphsensingfilmstotemperatureandtemperaturevariations AT gregoryatopasna responseofopticallytransparentphsensingfilmstotemperatureandtemperaturevariations |
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