Spray Coating of Two-Dimensional Suspended Film of Vanadium Oxide-Coated Carbon Nanotubes for Fabrication of a Large Volume Infrared Bolometer

Nandi, S and Misra, A (2019) Spray Coating of Two-Dimensional Suspended Film of Vanadium Oxide-Coated Carbon Nanotubes for Fabrication of a Large Volume Infrared Bolometer. In: ACS Applied Materials and Interfaces, 12 (1). pp. 1315-1321.

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Abstract

A novel spray coating and transfer method is developed for fabricating a suspended bolometer of vanadium oxide-coated multiwalled carbon nanotubes (VCNTs). A parametric study was performed to evaluate the effect of the substrate, modulation frequency, and temperature on the bolometric performance and revealed that the performance of the bolometer solely does not depend on the substrate parameter but modulation frequency and bias current as a function of temperature also play a key attribute. The TCR (temperature coefficient of resistance) of the suspended VCNT bolometer is �-0.41/K which is �486 higher than the reported suspended multiwalled CNTs at 300 K. Moreover, the suspended bolometer has a voltage responsivity of �67.42 ± 5.46 V/W (�7.68 times that of unsuspended) at 200 K. Thus, the study presents an efficient method to develop the suspended bolometer that has not been realized so far to obtain much higher TCR and responsivity. © 2019 American Chemical Society.

Item Type:	Journal Article
Publication:	ACS Applied Materials and Interfaces
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society
Keywords:	Bolometers; Carbon nanotubes; Coatings; Fabrication; Frequency modulation; Infrared detectors; Multiwalled carbon nanotubes (MWCN); Nanotubes; Oxides; Temperature, freestanding; Large volumes; Modulation frequencies; Spray coating; Substrate parameters; Temperature coefficient of resistance; Vanadium oxides; Voltage responsivity, Vanadium compounds
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	24 Jan 2020 10:29
Last Modified:	24 Jan 2020 10:29
URI:	http://eprints.iisc.ac.in/id/eprint/64365

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