Scotch Tape Optical Vapor Sensor for Ethanol-Methanol Mixtures

A simple optical vapor sensor based on conventional Scotch adhesive tape, for analyzing ethanol-methanol mixtures, is proposed and demonstrated. The sensing signal relies on the variation of optical power transmitted through the tape, resulting from the response of the adhesive material to vapor sor...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 19; no. 24; p. 5381
Main Author Angulo Barrios, Carlos
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 06.12.2019
MDPI
Subjects
Adhesive strength
Adhesives
Alcohol
Ethanol
Lasers
Light
Optical measuring instruments
Polymers
Selectivity
Sensors
Vapors
VOCs
Volatile organic compounds
methanol
Scotch tape
scattering
ethanol
optical sensor
vapor sensor
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Summary:A simple optical vapor sensor based on conventional Scotch adhesive tape, for analyzing ethanol-methanol mixtures, is proposed and demonstrated. The sensing signal relies on the variation of optical power transmitted through the tape, resulting from the response of the adhesive material to vapor sorption. The optical sensor exhibits high selectivity for ethanol vapor over methanol vapor. When exposed to vapors from ethanol-methanol liquid mixtures, the sensor shows a linear detection range of 0-100 vol%, and detection limits of 8.8 vol% ethanol and 17.6 vol% methanol. Repeatability, reproducibility, reversibility, and sensitivity to other volatile organic compounds are also studied.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s19245381