Recently, as applications based on triboelectricity have expanded, understanding the triboelectric charging behavior of various materials has become essential. This study investigates the triboelectric charging behaviors of various 2D layered materials, including MoS2, MoSe2, WS2, WSe2, graphene, and graphene oxide in a triboelectric series using the concept of a triboelectric nanogenerator, and confirms the position of 2D materials in the triboelectric series. It is also demonstrated that the results are obviously related to the effective work functions. The charging polarity indicates the similar behavior regardless of the synthetic method and film thickness ranging from a few hundred nanometers (for chemically exfoliated and restacked films) to a few nanometers (for chemical vapor deposited films). Further, the triboelectric charging characteristics could be successfully modified via chemical doping. This study provides new insights to utilize 2D materials in triboelectric devices, allowing thin and flexible device fabrication.
|Publication status||Published - 2018 Sept 26|
Bibliographical noteFunding Information:
M.S. and S.K. contributed equally to this work. This work was financially supported by the Industrial Strategic Technology Development Program (Grant No. 10052668, Development of wearable self-powered energy source and low-power wireless communication system for a pacemaker), the Technology Innovation Program (Grant No. 10065730, Flexible power module and system development for wearable devices), and the “Human Resources Program in Energy Technology (Grant No. 20174030201800)” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Trade, Industry & Energy, (MOTIE, Korea).
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering