1. Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen Guangdong 518055 China
2. Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education and School of Materials Science and Engineering Xiangtan University Xiangtan Hunan 411105 China
3. Faculty of Materials Science and Chemistry China University of Geosciences Wuhan Hubei 430074 China
4. Department of Mechanical Engineering University of Washington Seattle WA 98195‐2600 USA
5. Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong 518055 China