Structure-thermal property correlation of aligned silicon dioxide nanorod arrays

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	Structure-thermal property correlation of aligned silicon dioxide nanorod arrays
	Zhu, Jie 1,2; Zhu, Yu 3; Wu, Xuewang 1; Song, Helun 3; Zhang, Yaohui 3; Wang, Xiaojia 1
刊名	APPLIED PHYSICS LETTERS
	2016-06-06
卷号	108 期号:23
英文摘要	Quantitative characterization of thermal properties of nanorod (NR) arrays appears to be challenging due to the complex combination of high volume of air voids, anisotropy, and structural non-uniformity. This work investigates the structure-thermal property correlation of arrays consisting of either vertically aligned or slanted silicon dioxide (SiO2) NRs, fabricated by the dynamic shadowing growth technique. We apply the frequency-dependent time-domain thermoreflectance method to quantify the thermal properties of SiO2 NR arrays that may possess inhomogeneity along the depth direction. The effective thermal conductivities of four SiO2 NR array films and one reference capping layer for the SiO2 NR array are obtained. The impact of the structure on the effective thermal conductivities of the SiO2 NR array is discussed. The lowest effective thermal conductivity among all samples in this work is found to be 0.13 W m(-1) K-1 for the slanted NR array. We attribute the reduction in the effective thermal conductivity of the NR array to the discontinuous nature of SiO2 NRs, which reduces the density of the thermal transport channels and thus prevents heat flux from propagating downwards along the through-plane direction. The results from this work facilitate the potential applications of NR-array-based thermal insulators for micro-thermal devices. Published by AIP Publishing.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	GLANCING ANGLE DEPOSITION ; THIN-FILMS ; MICROPOROUS MEMBRANES ; CONDUCTIVITY ; NANOWIRES ; AEROGELS
收录类别	SCI
语种	英语
WOS记录号	WOS:000378924700014
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/112453]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Univ Minnesota, Dept Mech Engn, 111 Church St SE, Minneapolis, MN 55455 USA 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Suzhou Inst Nanotechnol & Nanobion, Suzhou 215123, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Jie,Zhu, Yu,Wu, Xuewang,et al. Structure-thermal property correlation of aligned silicon dioxide nanorod arrays[J]. APPLIED PHYSICS LETTERS,2016,108(23).
APA	Zhu, Jie,Zhu, Yu,Wu, Xuewang,Song, Helun,Zhang, Yaohui,&Wang, Xiaojia.(2016).Structure-thermal property correlation of aligned silicon dioxide nanorod arrays.APPLIED PHYSICS LETTERS,108(23).
MLA	Zhu, Jie,et al."Structure-thermal property correlation of aligned silicon dioxide nanorod arrays".APPLIED PHYSICS LETTERS 108.23(2016).