石墨烯
热导率
石墨
材料科学
氧化石墨烯纸
电导率
氧化物
复合材料
氧化石墨
石墨烯纳米带
硅
纳米技术
光电子学
化学
物理化学
冶金
作者
Wanyoung Jang,Zhen Chen,Wenzhong Bao,Chun Ning Lau,Chris Dames
出处
期刊:Nano Letters
[American Chemical Society]
日期:2010-09-13
卷期号:10 (10): 3909-3913
被引量:300
摘要
The thermal conductivity of graphene and ultrathin graphite (thickness from 1 to ∼20 layers) encased within silicon dioxide was measured using a heat spreader method. The thermal conductivity increases with the number of graphene layers, approaching the in-plane thermal conductivity of bulk graphite for the thickest samples, while showing suppression below 160 W/m-K at room temperature for single-layer graphene. These results show the strong effect of the encasing oxide in disrupting the thermal conductivity of adjacent graphene layers, an effect that penetrates a characteristic distance of approximately 2.5 nm (∼7 layers) into the core layers at room temperature.
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