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Copolysiloxane solvent detector using langmuir-blodgett surface potential method
Supian, F. L1, Yahaya, R2, Lim, D.C.K3.
A quick detection for volatile organic compounds (VOCs), especially in the indoor
environment is a must as the build-up level of VOCs is multiple times greater than outdoor
environment. By using a surface potential probe, we have analyzed the interaction between
copolysiloxane Langmuir-Blodgett (LB) thin films with several commercially used VOCs
solvent, specifically chloroform (CHCl3), isopropyl alcohol (IPA) and dichloromethane
(DCM). These copolysiloxane LB thin films, namely P50:50 and P25:75 had been deposited
onto aluminium-coated substrates. Subsequently, the surface potential (ΔV) of
copolysiloxane LB thin films were monitored during exposure to each solvent. Interaction
of these thin films with each solvent produced non-identical changes in ΔV values. In
addition, ∆Vmax value and halftime response for half ∆Vmax value (t50) were determined.
Later, a figure of merit, ƒ was calculated to determine the optimum sensing material per
solvent. The most promising candidates particularly as IPA solvent vapour sensors is P50:50
copolysiloxanes LB thin film that presented ΔVmax (106 mV), smallest halftime response for
half ∆Vmax value achieved, t50 (65 s), and considerable ƒ (1.631 mV/s), as compared to
others.
Affiliation:
- Universiti Pendidikan Sultan Idris, Malaysia
- Universiti Pendidikan Sultan Idris, Malaysia
- Universiti Pendidikan Sultan Idris, Malaysia
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Indexation |
Indexed by |
MyJurnal (2021) |
H-Index
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2 |
Immediacy Index
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0.000 |
Rank |
0 |
Indexed by |
Scopus 2020 |
Impact Factor
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CiteScore (1.3) |
Rank |
Q3 (Electrical and Electronic Engineering)) Q4 (Electronic, Optical and Magnetic Materials) |
Additional Information |
SJR (0.298) |
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