Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3665184
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Funding
- Ministry of Education of China [708068]
- National Natural Science Foundation of China [11074211, 51172191, 51006086, 11074213, 51176161]
- Center for Defect Physics in Structural Materials, an Energy Frontier Research Center
- U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences
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Based on folded graphene nanoribbons, we report a thermal conductance modulator which performs analogous operations as the rheostat in electronic circuits. This fundamental device can controllably and reversibly modulate the thermal conductance by varying the geometric structures and its tuning range can be up to 40% of the conductance of unfolded nanoribbons (similar to 1 nm wide and 7-15 nm long). Under this modulation, the conductance shows a linearly dependence on the folded angle, while undergoes a transition with the variation of the inter-layer distance. This primary thermal device may have great potential applications for phononic circuits and nanoscale thermal management. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665184]
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