期刊
NANO LETTERS
卷 15, 期 3, 页码 1660-1666出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl504276u
关键词
Transition metal dichalcogenides; 2D materials; strain engineering; photoluminescence; excitonics; magnetism
类别
资金
- Arizona State University, Research Seeding Program
- National Natural Science Foundation of China [91233120]
- National Basic Research Program of China [2011CB921901]
- NSFC [10974037]
- NBRPC [2010CB934102]
- CAS Strategy Pilot program [XDA 09020300]
- China Postdoctoral Science Foundation [2013M540127]
Creating materials with ultimate control over their physical properties is vital for a wide range of applications. From a traditional materials design perspective, this task often requires precise control over the atomic composition and structure. However, owing to their mechanical properties, low-dimensional layered materials can actually withstand a significant amount of strain and thus sustain elastic deformations before fracture. This, in return, presents a unique technique for tuning their physical properties by strain engineering. Here, we find that local strain induced on ReSe2, a new member of the transition metal dichalcogenides family, greatly changes its magnetic, optical, and electrical properties. Local strain induced by generation of wrinkle (1) modulates the optical gap as evidenced by red-shifted photoluminescence peak, (2) enhances light emission, (3) induces magnetism, and (4) modulates the electrical properties. The results not only allow us to create materials with vastly different properties at the nanoscale, but also enable a wide range of applications based on 2D materials, including strain sensors, stretchable electrodes, flexible field-effect transistors, artificial-muscle actuators, solar cells, and other spintronic, electromechanical, piezoelectric, photonic devices.
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