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Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique

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Enhanced Gas Sensing with Soft Functional Materials.

Susana I C J Palma¹, Carina Esteves¹, Ana C C S Pádua¹

¹UCIBIO, Departamento de Química, FCT-NOVA, Portugal.

ISOEN 2019 : 18Th International Symposium on Olfaction and Electronic Nose : 2019 Symposium Proceedings : ACROS Fukuoka, May 26-29, 2019. International Symposium on Olfaction and the Electronic Nose (18Th : 2019 : Fukuoka-Shi, Japan)

|August 8, 2022

Summary

This summary is machine-generated.

Researchers developed versatile gels from liquid crystals and ionic liquids for gas sensing. These novel biopolymeric gels can identify volatile organic compounds (VOCs) using combined optical and electrical signals.

Keywords:

biopolymer gel ionic liquid liquid crystal

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Area of Science:

Materials Science
Supramolecular Chemistry
Chemical Sensing

Background:

Self-assembly of liquid crystals and ionic liquids forms versatile gels.
Biopolymeric matrices stabilize these liquid crystal-ionic liquid droplets.
These gels offer tunable composition, structure, and function.

Purpose of the Study:

To characterize novel gels for gas sensor applications.
To explore the supramolecular structure for molecular recognition.
To utilize gels for distinguishing and identifying volatile organic compounds (VOCs).

Main Methods:

Fabrication of gels via self-assembly of liquid crystals and ionic liquids within a biopolymeric matrix.
Characterization of gel properties and supramolecular structure.
Integration of gels as sensing thin films in gas sensor devices.
Evaluation of gels' response to VOCs using distinct formulations.

Main Results:

Demonstrated the versatility of the gel system through tunable composition.
Explored the supramolecular structure for effective molecular recognition of VOCs.
Achieved combinatorial optical and electrical responses for VOC detection.
Successfully distinguished and identified various VOCs using the developed gas sensors.

Conclusions:

The developed biopolymeric gels show significant potential as sensing thin films.
The tunable supramolecular structure enables precise molecular recognition.
These gels offer a promising platform for advanced gas sensing technologies.