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Ultrathin Multifunctional Graphene-PVDF Layers for Multidimensional Touch Interactivity for Flexible Displays.

Ultrathin Multifunctional Graphene-PVDF Layers for Multidimensional Touch Interactivity for Flexible Displays.

Authors :
Gao S
Wu X
Ma H
Robertson J
Nathan A
Source :
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2017 Jun 07; Vol. 9 (22), pp. 18410-18416. Date of Electronic Publication: 2017 May 30.
Publication Year :
2017

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 nontransient force signals and avoiding force touch mis-registration by propagated stress.

Details

Language :
English
ISSN :
1944-8252
Volume :
9
Issue :
22
Database :
MEDLINE
Journal :
ACS applied materials & interfaces
Publication Type :
Academic Journal
Accession number :
28452224
Full Text :
https://doi.org/10.1021/acsami.7b03437