Synthesis of single-crystalline NdB₆ submicroawls via a simple flux-controlled self-catalyzed method

Abstract

Neodymium hexaboride (NdB 6 ) submicroawls have been fabricated via a simple flux-controlled selfcatalyzed method using neodymium (Nd) powders and boron trichloride (BCl 3 ) as starting materials at 1000 C. Scanning electron microscopy (SEM) reveals that the submicroawls are tapered, with a length of 2-5 mm and a diameter ranging from approximately 0.1-0.3 mm at the roots and 5-50 nm at the tips.Transmission electron microscopy (TEM) shows that the submicroawls are single crystalline with the preferred growth direction along [001]. For systematic research, we have discussed the morphological change of NdB 6 submicron structures by varying reaction temperatures, catalysts and duration.Moreover, a multistage growth model of the NdB 6 submicroawls is proposed.

Preparation and growth mechanism of one-dimensional NdB6 nanostructures: nanobelts, nanoawls, and nanotubes

“…Nanoawl. Based on our previous work, 33,34 we propose that the combination of self-catalyzed and vapor-solid growth is responsible for the growth of NdB 6 nanoawls. Fig.…”

“…In order to conrm the growth directions of these 1D nanostructures, we have measured more than one sample. In our previous work, 33 the growth directions of two NdB 6 submicroawls are determined to be both the [001] directions. Thus, we have measured three different NdB 6 submicroawls or nanoawls with the same growth directions.…”