期刊
SCIENTIFIC REPORTS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep10087
关键词
-
资金
- Science Fund for Creative Research Groups of the National Natural Science Foundation of China [10821201]
- National Natural Science Foundation of China [11374029, 50902037, 51172055, 51372056, 11234011]
- Fundamental Research Funds for the Central University [HIT.BRETIII.201220, HIT, NSRIF.2012045, HIT.ICRST.2010008]
- Foundation of the National Key Laboratory of Science and Technology on Advanced Composite in Special Environment in HIT
- International Science & Technology Cooperation Program of China [2012DFR50020]
- Program for New Century Excellent Talents in University [NCET-13-0174]
- Foundation for the Author of National Excellent Doctoral Dissertation of P.R. China [201214]
- Beijing Nova Program [Z121103002512017]
By understanding the growth mechanism of nanomaterials, the morphological features of nanostructures can be rationally controlled, thereby achieving the desired physical properties for specific applications. Herein, the growth habits of aluminum nitride (AlN) nanostructures and single crystals synthesized by an ultrahigh-temperature, catalyst-free, physical vapor transport process were investigated by transmission electron microscopy. The detailed structural characterizations strongly suggested that the growth of AlN nanostructures including AlN nanowires and nanohelixes follow a sequential and periodic rotation in the growth direction, which is independent of the size and shape of the material. Based on these experimental observations, an helical growth mechanism that may originate from the coeffect of the polar-surface and dislocation-driven growth is proposed, which offers a new insight into the related growth kinetics of low-dimensional AlN structures and will enable the rational design and synthesis of novel AlN nanostructures. Further, with the increase of temperature, the growth process of AlN grains followed the helical growth model.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据