Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10623998 | Ceramics International | 2016 | 8 Pages |
Abstract
Lanthanum-praseodymium hexaboride (LaxPr1âxB6) nanoawls have been fabricated via a simple flux-controlled method using lanthanum (La) powders, praseodymium (Pr) powders and boron trichloride (BCl3) gas as starting materials at 1050 °C. Scanning electron microscopy (SEM) shows that the tapered nanoawls have a length of 2-10 μm and a diameter ranging from 50 to 300 nm at the roots and 10-80 nm at the tips. Transmission electron microscopy (TEM) reveals that the nanoawls are single crystalline with the preferred growth direction along [110]. Raman spectra indicate that the T1u mode splitting effect occurs in this ternary rare-earth hexaboride. In addition, a concentration gradient is necessary to create these awl-like structures where the combination of self-catalyzed and vapor-solid growth is responsible for the growth of tapered LaxPr1âxB6 nanoawls.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Wei Han, Hao Zhang, Jian Chen, Yanming Zhao, Qinghua Fan, Qidong Li, Xudong Liu, Xinghao Lin,