Issue 43, 2020

Drawing WS2 thermal sensors on paper substrates

Abstract

Paper based thermoresistive sensors are fabricated by rubbing WS2 powder against a piece of standard copier paper, like the way a pencil is used to write on paper. The abrasion between the layered material and the rough paper surface erodes the material, breaking the weak van der Waals interlayer bonds, yielding a film of interconnected platelets. The resistance of WS2 presents a strong temperature dependence, as expected for a semiconductor material in which charge transport is due to thermally activated carriers. This strong temperature dependence makes the paper supported WS2 devices extremely sensitive to small changes in temperature. This exquisite thermal sensitivity, and their fast response times to sudden temperature changes, is exploited thereby demonstrating the usability of a WS2-on-paper thermal sensor in a respiration monitoring device.

Graphical abstract: Drawing WS2 thermal sensors on paper substrates

Supplementary files

Article information

Article type
Paper
Submitted
18 Aug. 2020
Accepted
22 Okt. 2020
First published
23 Okt. 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2020,12, 22091-22096

Drawing WS2 thermal sensors on paper substrates

M. Lee, A. Mazaheri, H. S. J. van der Zant, R. Frisenda and A. Castellanos-Gomez, Nanoscale, 2020, 12, 22091 DOI: 10.1039/D0NR06036D

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