Gao, S;
Wu, X;
Ma, H;
Robertson, J;
Nathan, A;
(2017)
Ultrathin Multi-functional Graphene-PVDF Layers for Multi-dimensional Touch Interactivity for Flexible Displays.
ACS Applied Materials and Interfaces
, 9
(22)
pp. 18410-18416.
10.1021/acsami.7b03437.
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Abstract
This paper presents a flexible graphene/polyvinylidene difluoride (PVDF)/graphene sandwich for three-dimensional touch interactivity. Here, x-y plane touch is sensed using graphene capacitive elements, while force sensing in the z-direction is by a piezoelectric PVDF/graphene sandwich. By employing different frequency bands for the capacitive- and force-induced electrical signals, the two stimuli are detected simultaneously, achieving three-dimensional touch sensing. Static force sensing and elimination of propagated stress are achieved by augmenting the transient piezo output with the capacitive touch, thus overcoming the intrinsic inability of the piezoelectric material in detecting non-transient force signals and avoiding force touch mis-registration by propagated stress.
| Type: | Article |
|---|---|
| Title: | Ultrathin Multi-functional Graphene-PVDF Layers for Multi-dimensional Touch Interactivity for Flexible Displays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsami.7b03437 |
| Publisher version: | http://doi.org/10.1021/acsami.7b03437 |
| Language: | English |
| Additional information: | © 2017 American Chemical Society. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Graphene, PVDF, Multi-functional film, Multi-dimensional sensing, Static Force Detection and Propagated Stress Elimination |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1554751 |
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