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.
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