TY - JOUR
T1 - Mechanical Stability of Flexible Graphene-Based Displays
AU - Anagnostopoulos, George
AU - Pappas, Panagiotis Nektarios
AU - Li, Zheling
AU - Kinloch, Ian A.
AU - Young, Robert J.
AU - Novoselov, Konstantin S
AU - Lu, Ching Yu
AU - Pugno, Nicola
AU - Parthenios, John
AU - Galiotis, Costas
AU - Papagelis, Konstantinos
PY - 2016/8/5
Y1 - 2016/8/5
N2 - 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.
AB - 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.
KW - CVD graphene
KW - mechanical performance
KW - Raman spectroscopy
KW - touch panel displays
KW - wrinkles
U2 - 10.1021/acsami.6b05227
DO - 10.1021/acsami.6b05227
M3 - Article
AN - SCOPUS:84984876934
SN - 1944-8244
VL - 8
SP - 22605
EP - 22614
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 34
ER -