We report direct imaging of nanoscale thermal transport in single and few-layer graphene with approximately 50 nm lateral resolution using high vacuum scanning thermal microscopy. We observed increased heat transport in suspended graphene where heat is conducted by ballistic phonons, compared to adjacent areas of supported graphene, and observed decreasing thermal conductance of supported graphene with increased layer number. Our nanothermal images suggest a mean-free-path of thermal phonons in supported graphene below 100 nm.
机构:
Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA
Harvard Univ, Dept Phys, Cambridge, MA 02138 USAOklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA
Borunda, Mario F.
Hennig, H.
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Harvard Univ, Dept Phys, Cambridge, MA 02138 USAOklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA
Hennig, H.
Heller, Eric J.
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Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USAOklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA
机构:
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua UniversityKey Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua University
Zhi-Ke Liu
Yang Shen
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Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua UniversityKey Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua University
Yang Shen
Han-Ling Li
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Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua UniversityKey Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua University
Han-Ling Li
Bing-Yang Cao
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Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua UniversityKey Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua University
机构:
Univ Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USAUniv Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA
Karna, Pravin
Bin Hoque, Md Shafkat
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Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USAUniv Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA
Bin Hoque, Md Shafkat
Thakur, Sandip
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Univ Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USAUniv Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA
Thakur, Sandip
Hopkins, Patrick E.
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机构:
Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA
Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA
Univ Virginia, Dept Phys, Charlottesville, VA 22904 USAUniv Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA
Hopkins, Patrick E.
Giri, Ashutosh
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Univ Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USAUniv Rhode Isl, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA
机构:
Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USAUniv Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA
Li, Xun
Lee, Sangyeop
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Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA
Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15261 USAUniv Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA