title: Mechanical Stability of Flexible Graphene-Based Displays.
abstract: The mechanical behavior of a prototype touch panel display, which consists of two layers of CVD graphene embedded into PET films, is investigated in tension and under contact-stress dynamic loading. In both cases, laser Raman spectroscopy was employed to assess the stress transfer efficiency of the embedded graphene layers. The tensile behavior was found to be governed by the "island-like" microstructure of the CVD graphene, and the stress transfer efficiency was dependent on the size of graphene "islands" but also on the yielding behavior of PET at relatively high strains. Finally, the fatigue tests, which simulate real operation conditions, showed that the maximum temperature gradient developed at the point of "finger" contact after 80 000 cycles does not exceed the glass transition temperature of the PET matrix. The effect of these results on future product development and the design of new graphene-based displays are discussed.
authors: Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ICE-HT), Patras 265 04, Greece.
authors: George
authors: G
authors: Anagnostopoulos
authors: Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ICE-HT), Patras 265 04, Greece.
authors: Panagiotis-Nektarios
authors: PN
authors: Pappas
authors: Zheling
authors: Z
authors: Li
authors: Ian A
authors: IA
authors: Kinloch
authors: Robert J
authors: RJ
authors: Young
authors: Kostya S
authors: KS
authors: Novoselov
authors: Ching Yu
authors: CY
authors: Lu
authors: Laboratory of Bio-Inspired and Graphene Nanomechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento , Via Mesiano 77, I-38123 Trento, Italy.|Center for Materials and Microsystems, Fondazione Bruno Kessler , I-38123 Trento, Italy.|School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom.
authors: Nicola
authors: N
authors: Pugno
authors: Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ICE-HT), Patras 265 04, Greece.
authors: John
authors: J
authors: Parthenios
authors: Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ICE-HT), Patras 265 04, Greece.
authors: Costas
authors: C
authors: Galiotis
authors: Institute of Chemical Engineering Sciences, Foundation for Research and Technology - Hellas (FORTH/ICE-HT), Patras 265 04, Greece.
authors: Konstantinos
authors: K
authors: Papagelis
keywords: CVD graphene; Raman spectroscopy; mechanical performance; touch panel displays; wrinkles