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锥形氧化锌晶须：来自部分熔融底部源的{hkil}特定镶嵌孪晶VLS生长。

Tapered ZnO Whiskers: {hkil}-Specific Mosaic Twinning VLS Growth from a Partially Molten Bottom Source.

作者信息

Huang Bang-Hao, Shen Pouyan, Chen Shuei-Yuan

出版信息

Nanoscale Res Lett. 2009 Jun;4(6):503-512. doi: 10.1007/s11671-009-9273-2. Epub 2009 Feb 25.

DOI:10.1007/s11671-009-9273-2
PMID:20596385
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2894128/
Abstract

Zn particulates overlaid with wurtzite (W)-type ZnO condensates having nearly orthogonal {101̄1} and {112̄1} facets were found to self-catalyze unusual tapered W-ZnO whiskers upon isothermal atmospheric annealing, i.e., thermal oxidation, at 600 °C. Analytical electron microscopic observations indicated that such whiskers formed tapered slabs having mosaic {101̄1} and {21̄1̄1} twinned domains. The tapered whiskers can be rationalized by an alternative vapor-liquid-solid growth, i.e., {hkil}-specific coalescence twinning growth from the ZnO condensates taking advantage of a partially molten bottom source of Zn and the adsorption of atoms at the whisker tips and ledges under the influence of capillarity effect. The tapered whiskers having strong photoluminescence at 391 nm and with a considerable flexibility could have potential applications.

摘要

发现覆盖有纤锌矿（W）型ZnO凝聚物且具有近乎正交的{101̄1}和{112̄1}晶面的Zn颗粒，在600℃等温大气退火（即热氧化）时会自催化形成异常的锥形W-ZnO晶须。分析电子显微镜观察表明，此类晶须形成了具有镶嵌{101̄1}和{21̄1̄1}孪晶域的锥形平板。锥形晶须可通过一种替代的气-液-固生长方式来解释，即利用部分熔融的Zn底部源以及在毛细效应影响下晶须尖端和边缘处原子的吸附，从ZnO凝聚物中进行{hkil}特定的聚结孪晶生长。在391nm处具有强光致发光且具有相当柔韧性的锥形晶须可能具有潜在应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/13cba919dcea/1556-276X-4-503-8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/13cba919dcea/1556-276X-4-503-8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/e136742a9d8d/1556-276X-4-503-1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/7b9910aa1384/1556-276X-4-503-2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/2cb68fc4b4cb/1556-276X-4-503-5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/9984d5b80b96/1556-276X-4-503-6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/332b4bea3181/1556-276X-4-503-7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f15/3242496/13cba919dcea/1556-276X-4-503-8.jpg

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