CUED Publications database

Capacitive behavior of carbon nanotube thin film induced by deformed ZnO microspheres.

Tripathi, R and Majji, SN and Ghosh, R and Nandi, S and Boruah, BD and Misra, A (2017) Capacitive behavior of carbon nanotube thin film induced by deformed ZnO microspheres. Nanotechnology, 28. 395101-.

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Abstract

Multiwalled carbon nanotubes (CNTs) are uniformly distributed with piezoelectric microspheres. This leads to a large strain gradient due to an induced capacitive response, providing a 250% enhancement in electromechanical response compared with pristine CNTs. The fabricated large-area flexible thin film exhibits excellent pressure sensitivity, which can even detect an arterial pulse with a much faster response time (∼79 ms) in a bendable configuration. In addition, the film shows a rapid relaxation time (∼0.4 s), high stability and excellent durability with a rapid loading-unloading cycle. The dominant contribution of piezoelectric microspheres in a CNT matrix as opposed to nanoparticles showed a much higher sensitivity due to the large change in capacitance. Therefore, hybrid microstructures have various potential applications in wearable smart electronics, including detection of human motion and wrist pulses.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 03 Jun 2019 20:04
Last Modified: 01 Apr 2021 03:46
DOI: 10.1088/1361-6528/aa7df7