Journal
NANO LETTERS
Volume 13, Issue 6, Pages 2931-2936Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl4013166
Keywords
Transition metal dichalcogenide; strain; absorption; photoluminescence; second harmonic generation; crystallographic orientation
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Funding
- National Science Foundation Grant [DMR-0907477, DMR-0349201]
- Research Corporation Scialog Program at Case Western Reserve University
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0907477] Funding Source: National Science Foundation
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We demonstrate the continuous tuning of the electronic structure of atomically thin MoS2 on flexible substrates by applying a uniaxial tensile strain. A redshift at a rate of similar to 70 meV per percent applied strain for direct gap transitions, and at a rate 1.6 times larger for indirect gap transitions, has been determined by absorption and photoluminescence spectroscopy. Our result, in excellent agreement with first principles calculations, demonstrates the potential of two-dimensional crystals for applications in flexible electronics and optoelectronics.
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