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题名: Structure-thermal property correlation of aligned silicon dioxide nanorod arrays
作者: Zhu, J; Zhu, Y(朱煜); Wu, XW; Song, HL(宋贺伦); Zhang, YH(张耀辉); Wang, XJ
通讯作者: Wang, XJ
刊名: APPLIED PHYSICS LETTERS
发表日期: 2016
DOI: 10.1063/1.4953625
卷: 108, 期:23
收录类别: SCI ; EI
文章类型: 期刊论文
部门归属: 系统集成与IC设计部
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.
关键词[WOS]: GLANCING ANGLE DEPOSITION ; THIN-FILMS ; MICROPOROUS MEMBRANES ; CONDUCTIVITY ; NANOWIRES ; AEROGELS
语种: 英语
JCR小类分区: 二区
WOS记录号: WOS:000378924700014
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/4527
Appears in Collections:系统集成与IC设计部_张耀辉团队_期刊论文

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Recommended Citation:
Zhu, J,Zhu, Y,Wu, XW,et al. Structure-thermal property correlation of aligned silicon dioxide nanorod arrays[J]. APPLIED PHYSICS LETTERS,2016,108(23).
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