Enhanced piezoelectric effect at the edges of stepped molybdenum disulfide nanosheets

We acknowledge funding from the Young 1000 Global Talent Recruitment Program of the Ministry of Education of China (KG and ML), the National Natural Science Foundation of China (grants no. 61502326, 41550110223, 11661131002, 11375127), the Jiangsu Government (grant no. BK20150343, BK20130280), the Ministry of Finance of China (grant no. SX21400213), the Young 973 National Program of the Chinese Ministry of Science and Technology (grant no. 2015CB932700) and the ERC Grant Hetero2D, the EU Graphene Flagship, EPSRC Grants EP/K01711X/1, EP/K017144/1, EP/L016087/1, EP/N010345/1, the Collaborative Innovation Center of Suzhou Nano Science & Technology, the Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices and the Priority Academic Program Development of Jiangsu Higher Education Institutions.