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Bile salt incorporated polypyrrole thin film for ethanol sensing

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Title Bile salt incorporated polypyrrole thin film for ethanol sensing
 
Creator Sharma, Partha P D
Sarkar, D
 
Subject Polypyrrole
Bile salt
Composite
Sensing
Ethanol
 
Description 203-208
Polypyrrole (PPy)-bile salt composite was
used for sensing ethanol vapor. PPy was synthesized by interface polymerization
for subsequent fabrication of thin film of its composite with bile salt, by
in-situ co-dispersion method and then exposed to ethanol vapour. Sensing was
visualized through changes in morphological, structural and optical
characterizations. The ethanol exposed film showed larger agglomeration as
revealed in its surface morphology on
scanning electron microscope (SEM) and greater crystallinity as seen through
X-Ray diffraction (XRD). Fourier transform infra red (FTIR) and nuclear
magnetic resonance spectroscopy (NMR) of the ethanol incorporated film also
gave signature of the presence of bile salt and alcohol. Alcohol incorporation
pattern resulted in increase in electrical conductance from 7.08539 × 10-5 mA/V to 8.0356 × 10-5 mA/V, as determined
from current voltage characterizations. Average
molecular weight (Mn) obtained from gel permeation chromatography
changed from 6160 to 10300 on ethanol intake.
Photoluminescence (PL) intensity was quenched and the PL peak shifted from 430
to 409 on ethanol exposure. Changes in morphological, structural, optical and
electrical properties of the composite on ethanol exposure showed its
prospective application for sensing ethanol.
 
Date 2015-05-14T11:43:36Z
2015-05-14T11:43:36Z
2015-04
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://hdl.handle.net/123456789/31532
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJBB Vol.52(2) [April 2015]