期刊
NANO LETTERS
卷 17, 期 12, 页码 7647-7651出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b03669
关键词
Molybdenum disulfide; elastic properties; ultrathin membranes; micro-Brillouin light scattering
类别
资金
- Severo Ochoa Program (MINECO) [SEV-2013-0295]
- CERCA Programme/Generalitat de Catalunya
- Spanish MICINN projects PHENTOM [FIS2015-70862-P]
- Spanish MINECO project WINCOST [ENE2016-80788-C5-1-R]
- Foundation for Polish Science [Homing/2016-1/2]
- Alexander von Humboldt foundation
The performance gain-oriented nanostructurization has opened a new pathway for tuning mechanical features of solid matter vital for application and maintained performance. Simultaneously, the mechanical evaluation has been pushed down to dimensions way below 1 mu m. To date, the most standard technique to study the mechanical properties of suspended 2D materials is based on nanoindentation experiments. In this work, by means of micro-Brillouin light scattering we determine the mechanical properties, that is, Young modulus and residual stress, of polycrystalline few nanometers thick MoS2 membranes in a simple, contact-less, nondestructive manner. The results show huge elastic softening compared to bulk MoS2, which is correlated with the sample morphology and the residual stress.
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