A novel gas sensor using polymer dispersed liquid crystal doped with carbon nanotubes

Author

Yu-Tse Lai ; Yao-Joe Yang

Author_Institution

Nat. Taiwan Univ., Taipei, Taiwan

fYear

2013

fDate

20-24 Jan. 2013

Firstpage

977

Lastpage

980

Abstract

This work presents the development of a novel chemical sensor using a sensing film which consists of polymer dispersed liquid crystal (PDLC) doped with carbon nanotubes (CNT) for acetone detection. The sensing element comprises a PDLC sensing film and planar interdigital electrode pairs. Chemical gas can be easily detected by measuring the changes in the electrical resistance of the sensing film caused by the orientational ordering transitions of CNT and LC. Also, the PDLC film in the rubbery state can be easily packaged and stabilized against gravitational forces and mechanical shock. The advantages of the proposed sensor include robust, high sensing range, and short response time.

Keywords

carbon nanotubes; electric resistance measurement; electrochemical electrodes; gas sensors; interdigital transducers; organic compounds; polymer dispersed liquid crystals; thin film sensors; C; CNT; PDLC sensing film; acetone detection; carbon nanotube; chemical sensor; electrical resistance measurement; gas sensor; gravitational force stability; mechanical shock; planar interdigital electrode pair; polymer dispersed liquid crystal; Carbon nanotubes; Chemicals; Electrodes; Films; Liquid crystals; Polymers; Sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Micro Electro Mechanical Systems (MEMS), 2013 IEEE 26th International Conference on

Conference_Location

Taipei

ISSN

1084-6999

Print_ISBN

978-1-4673-5654-1

Type

conf

DOI

10.1109/MEMSYS.2013.6474410

Filename

6474410