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Dehydration Sensing of a Polyvinyl Alcohol Film via Plasmonic Nanoparticles

Published online by Cambridge University Press:  24 January 2019

Milana O. Lisunova
Milana O. Lisunova*
Affiliation:
School of Materials Science and Engineering and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA30332, USA MicroElectronics-Photonics Program, Institute for Nanoscience and Engineering and Ralph E. Martin Department of Chemical Engineering, 3202 Bell Engineering Center, University of Arkansas, Fayetteville, AR72701, USA
*
*(Email: milanalisunova33@gmail.com)
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Abstract

In situ, real-time monitoring of a dehydration of poly(vinyl alcohol) (PVA) film is researched. The technique based on the incorporation plasmonic nanocages (NCs) between the two identical layers of PVA, (PVA)/NCs/(PVA) film, and its sensitivity to the variation of the refractive index of the surrounding PVA film via desorption water. The dehydration time increases from 180 (s) to 1800 (s) as the content of the PVA in the films increases twice, from (PVA)/NCs/(PVA) to (PVA)2/NCs/(PVA)2. Such effect could be explained by different rate of the molecules desorption from the PVA based films. Specifically, the dehydration rate is of 0.22 (vol% per s) and 0.026 (vol% per s) for (PVA)/NCs/(PVA) and (PVA)2/NCs/(PVA)2 films, respectively. The dehydration rate constant reduces from -50×10-4 (s-1) to -4.3 ×10-4 (s-1) as the content of PVA increases from (PVA)/NCs/(PVA) to (PVA)2/NCs/(PVA)2 films, respectively.

Keywords

plasmonicAuwaterpolymersensor
Type
Articles
Information
MRS Advances , Volume 4 , Issue 5-6: Nanomaterials , 2019 , pp. 299 - 304
Copyright
Copyright © Materials Research Society 2019 

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