期刊
NANO ENERGY
卷 35, 期 -, 页码 26-35出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.03.019
关键词
Graphene nanomesh; Thermoelectric; Thermal conductivity; Bilayer graphene nanostructures; Block copolymer
类别
资金
- Global Frontier Research Program - Korean Government (MEST) [2011-0032156]
- R AMP
- D Convergence Program of NST (National Research Council of Science AMP
- Technology) of the Republic of Korea
- Korea Institute of Science and Technology (KIST)
- MITEI Seed Fund
- Ministry of Science & ICT (MSIT), Republic of Korea [2E27281] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2011-0032156] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
When graphene is shrunk into similar to 10 nm scale graphene nanoribbons or nanomesh structures, it is expected that not only electrical properties but also thermal conductivity and thermoelectric property are significantly altered due to the quantum confinement effect and extrinsic phonon-edge scattering. Here, we fabricate large-area, sub-10 nm single-and bilayer graphene nanomeshes from block copolymer self-assembly and measure the thermal conductivity, thermoelectric and electrical transport properties to experimentally verify the effect of sub-10 nm quantum confinement, phonon-edge scattering and cross-plane coupling. Among the large variety of the samples, bilayer graphene nanomesh having 8 nm-neck width showed significantly low thermal conductivity down to similar to 78 W m(-1) K-1, which is the lowest thermal conductivity for suspended graphene nanostructures, and a high thermopower value of -520 mu V K-1, while it still shows the comparably high carrier mobility. Classical and quantum mechanical calculations successfully supported our nanomesh approach, which can achieve high thermoelectric properties based on the significantly reduced thermal conductivity and higher thermopower due to the confined geometry.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据