Samsung Advanced Institute of Technology, Suwon, 443-803, Republic of Korea.
School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon, 440-746, Republic of Korea.
Adv Mater. 2018 Sep;30(39):e1801210. doi: 10.1002/adma.201801210. Epub 2018 Aug 16.
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 MoS , MoSe , WS , WSe , 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.
最近，随着基于摩擦起电的应用的扩展，了解各种材料的摩擦起电充电行为变得至关重要。本研究使用摩擦纳米发电机的概念，调查了各种二维层状材料（包括 MoS2、MoSe2、WS2、WSe2、石墨烯和氧化石墨烯）的摩擦起电充电行为，并确认了二维材料在摩擦序列中的位置。还证明了结果与有效功函数明显相关。无论合成方法和从几百纳米（化学剥离和再堆叠薄膜）到几纳米（化学气相沉积薄膜）的薄膜厚度如何，充电极性都表明相似的行为。此外，通过化学掺杂可以成功地修饰摩擦起电充电特性。本研究为在摩擦电设备中利用二维材料提供了新的见解，允许制造薄而灵活的设备。
