Intrinsic anisotropy of thermal conductance in graphene nanoribbons

Yong Xu; Xiaobin Chen; Bing-Lin Gu; Wenhui Duan
December 2009
Applied Physics Letters;12/7/2009, Vol. 95 Issue 23, p233116
Academic Journal
Thermal conductance of graphene nanoribbons (GNRs) with the width varying from 0.5 to 35 nm is systematically investigated using nonequilibrium Green’s function method. Anisotropic thermal conductance is observed with the room temperature thermal conductance of zigzag GNRs up to ∼30% larger than that of armchair GNRs. At room temperature, the anisotropy is found to disappear when the width is larger than 100 nm. This intrinsic anisotropy originate from different boundary condition at ribbon edges, and can be used to tune thermal conductance, which have important implications for the applications of GNRs in nanoelectronics and thermoelectricity.


Related Articles

  • Snap-Through Instability of Graphene on Substrates. Teng Li; Zhao Zhang // Nanoscale Research Letters;Jan2010, Vol. 5 Issue 1, p169 

    We determine the graphene morphology regulated by substrates with herringbone and checkerboard surface corrugations. As the graphene–substrate interfacial bonding energy and the substrate surface roughness vary, the graphene morphology snaps between two distinct states: (1) closely...

  • Commercial Applications & Uses of Graphene. de La Fuente, Jesus // Nanotechnology Law & Business;Winter2013, Vol. 10, p118 

    Graphene is one of the most recently developed nanomaterials and is receiving widespread attention in academic and corporate research labs. An industry is emerging to supply graphene materials, and there are various possible applications for graphene-based products. In this article, executive...

  • Atomic scale investigation of the abnormal transport properties in bilayer graphene nanoribbon. Li, Yong-Jun; Li, Ming-Da; Liu, Jian-Shuang; Sun, Qing-Qing; Zhou, Peng; Wang, Peng-Fei; Ding, Shi-Jin; Wei Zhang, David // Applied Physics Letters;1/2/2012, Vol. 100 Issue 1, p013110 

    We investigate the transport properties of bilayer AA-stacking zigzag graphene nanoribbons (bi-zGNRs) and observe abnormal I-V characteristics which are sensitive to the number of carbon chains across the ribbons. Combining the chirality selective rule of Dirac electrons in graphene and the...

  • Enhanced thermoelectric performance of graphene nanoribbons. Zheng, H.; Liu, H. J.; Tan, X. J.; Lv, H. Y.; Pan, L.; Shi, J.; Tang, X. F. // Applied Physics Letters;2/27/2012, Vol. 100 Issue 9, p093104 

    The thermoelectric properties of a series of armchair and zigzag graphene nanoribbons with narrow width are examined using nonequilibrium Green function method and molecular dynamics simulations. It is found that these nanoribbons are rather stable when the edge atoms are passivated by hydrogen...

  • High Performance Graphene Nano-ribbon Thermoelectric Devices by Incorporation and Dimensional Tuning of Nanopores. Sharafat Hossain, Md; Al-Dirini, Feras; Hossain, Faruque M.; Skafidas, Efstratios // Scientific Reports;6/19/2015, p11297 

    Thermoelectric properties of Graphene nano-ribbons (GNRs) with nanopores (NPs) are explored for a range of pore dimensions in order to achieve a high performance two-dimensional nano-scale thermoelectric device. We reduce thermal conductivity of GNRs by introducing pores in them in order to...

  • Dwell time in graphene-based magnetic barrier nanostructures. Gong, Yiyang; Guo, Yong // Journal of Applied Physics;Sep2009, Vol. 106 Issue 6, p064317-1 

    The authors have investigated the dwell time of electrons tunneling through nonuniform magnetically modulated graphene monolayer. Two types of models, i.e., the square magnetic barrier and the δ-function magnetic barrier, are introduced to simulate the magnetic modulation realized by...

  • The peculiar transport properties in p-n junctions of doped graphene nanoribbons. Zhang, D. H.; Yao, K. L.; Gao, G. Y. // Journal of Applied Physics;Jul2011, Vol. 110 Issue 1, p013718 

    Two kinds of junctions based on doped graphene nanoribbons (GNRs) are designed and studied in this article. One is the N-doped armchair GNR (AGNR) joined directly by B-doped AGNRs, and another is similar, but there is an undoped AGNR between them. The transport properties are calculated using...

  • Charge transfer between reduced graphene oxide sheets on insulating substrates. Shen, Yue; Zhang, Xueqiang; Wang, Ying; Zhou, Xuejiao; Hu, Jun; Guo, Shouwu; Zhang, Yi // Applied Physics Letters;7/29/2013, Vol. 103 Issue 5, p053107 

    Understanding the electrical communications between graphene sheets placed on insulating substrates is of great value to rational design of functional graphene nanoelectronics. In this paper, we report charge transfer between reduced graphene oxide (rGO) sheets separated in hundreds of...

  • Conductance fluctuations as a function of sliding motion in bilayer graphene nanoribbon junction: A first-principles investigation. Zheng, Jiming; Guo, Ping; Ren, Zhaoyu; Jiang, Zhenyi; Bai, Jintao; Zhang, Zhiyong // Applied Physics Letters;8/20/2012, Vol. 101 Issue 8, p083101 

    A bilayer graphene nanoribbon based strain sensor is designed and investigated via first principles simulations. The interlayer sliding induces dramatically oscillation of current in order of several magnitudes. Electronic structure analysis attributes this oscillation of current to periodic...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics