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

Tripathi, Rahul and Majji, Shanmukh Naidu and Ghosh, Rituparna and Nandi, Sukanta and Boruah, Buddha D and Misra, Abha (2017) Capacitive behavior of carbon nanotube thin film induced by deformed ZnO microspheres. In: NANOTECHNOLOGY, 28 (39).

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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 (similar to 79 ms) in a bendable configuration. In addition, the film shows a rapid relaxation time (similar to 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:	Journal Article
Publication:	NANOTECHNOLOGY
Additional Information:	Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	30 Sep 2017 09:21
Last Modified:	30 Sep 2017 09:21
URI:	http://eprints.iisc.ac.in/id/eprint/57916

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