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具有高能{001}面的单晶TiO纳米刷结构的动力学控制制备

Kinetically Controlled Fabrication of Single-Crystalline TiO Nanobrush Architectures with High Energy {001} Facets.

作者信息

Fan Lisha, Gao Xiang, Lee Dongkyu, Guo Er-Jia, Lee Shinbuhm, Snijders Paul C, Ward Thomas Z, Eres Gyula, Chisholm Matthew F, Lee Ho Nyung

机构信息

Oak Ridge National Laboratory Oak Ridge TN 37831 USA.

出版信息

Adv Sci (Weinh). 2017 Apr 5;4(8):1700045. doi: 10.1002/advs.201700045. eCollection 2017 Aug.

DOI:10.1002/advs.201700045
PMID:28852622
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5566339/
Abstract

This study demonstrates that precise control of nonequilibrium growth conditions during pulsed laser deposition (PLD) can be exploited to produce single-crystalline anatase TiO nanobrush architectures with large surface areas terminated with high energy {001} facets. The data indicate that the key to nanobrush formation is controlling the atomic surface transport processes to balance defect aggregation and surface-smoothing processes. High-resolution scanning transmission electron microscopy data reveal that defect-mediated aggregation is the key to TiO nanobrush formation. The large concentration of defects present at the intersection of domain boundaries promotes aggregation of PLD growth species, resulting in the growth of the single-crystalline nanobrush architecture. This study proposes a model for the relationship between defect creation and growth mode in nonequilibrium environments, which enables application of this growth method to novel nanostructure design in a broad range of materials.

摘要

本研究表明，在脉冲激光沉积（PLD）过程中，对非平衡生长条件进行精确控制，可用于制备具有大表面积且以高能{001}面为终端的单晶锐钛矿TiO纳米刷结构。数据表明，纳米刷形成的关键在于控制原子表面传输过程，以平衡缺陷聚集和表面平滑过程。高分辨率扫描透射电子显微镜数据显示，缺陷介导的聚集是TiO纳米刷形成的关键。在畴界交叉处存在的大量缺陷促进了PLD生长物种的聚集，从而导致了单晶纳米刷结构的生长。本研究提出了一种非平衡环境中缺陷产生与生长模式之间关系的模型，这使得这种生长方法能够应用于广泛材料的新型纳米结构设计。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/6e9a46cdf750/ADVS-4-na-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/1daa8bd19b49/ADVS-4-na-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/01d094e53eec/ADVS-4-na-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/d991b842edb0/ADVS-4-na-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/6e9a46cdf750/ADVS-4-na-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/1daa8bd19b49/ADVS-4-na-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/01d094e53eec/ADVS-4-na-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/d991b842edb0/ADVS-4-na-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2f22/5566339/6e9a46cdf750/ADVS-4-na-g004.jpg

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本文引用的文献

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