题目：

Piezoelectricity in Two Dimensions: Graphene vs. Molybdenum Disulfide

作者：

Xiaoxue Song¹, Fei Hui¹, Theresia Knobloch^1,2, Bingru Wang¹, Zhongchao Fan^3,4, Tibor Grasser², Xu Jing¹,Yuanyuan Shi¹, Mario Lanza^1,*

单位：

¹Institute of Functional Nano and Soft Materials, Collaborative Innovation Center of Suzhou Nanoscience and Technology, Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren-Ai Road, Suzhou 215123, China.

²Institute of Microelectronics, TU Wien, Gusshausstrasse 27-29, 1040 Vienna, Austria

³Engineering Research Center for Semiconductor Integrated Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

⁴School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China

摘要：

The synthesis of piezoelectric two-dimensional (2D) materials is very attractive for implementing advanced energy harvesters and transducers, as these materials provide enormously large areas for the exploitation of the piezoelectric effect. Among all 2D materials, molybdenum disulfide (MoS₂) has shown the largest piezoelectric activity. However, all research papers in this field studied just a single material, and this may raise concerns because different setups could provide different values depending on experimental parameters (e.g., probes used and areas analyzed). By using conductive atomic force microscopy, here we in situ demonstrate that the piezoelectric currents generated in MoS₂ are gigantic (65mA/cm²), while the same experiments in graphene just showed noise currents. These results provide the most reliable comparison yet reported on the piezoelectric effect in graphene and MoS₂.

影响因子：

3.411

分区情况：

二区

链接：

http://aip.scitation.org/doi/abs/10.1063/1.5000496