Extracting superconducting single-crystal Nb mesowires out of NbSe2 by a crystal-lattice collapse method.
The author reports a conceptually new approach to superconducting niobium (Nb) mesowires in high yields from layered compounds (NbSe2) by solid-state pyrolysis. High-resolution transmission electron microscopy and selected-area electron diffraction demonstrate that the mesowires are single crystalline, grow along the [001] direction, and have specific facets. Unlike the previous electrodeposition routes within templates, a possible vapor-solid interaction mechanism was first proposed for component-selective epitaxial growth of one-dimensional Nb lattices where vapor-assisted collapse of NbSe2 crystal structure occurs through disposing of Se vapor phase matrix at enhanced temperatures.
Li
Jian-Min
JM
Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China. phyjmli@zju.edu.cn
D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D009556:Niobium / Q000737:chemistry*; D010316:Particle Size; D012643:Selenium / Q000737:chemistry*; D013499:Surface Properties
D046911:Macromolecular Substances; D009556:Niobium; D012643:Selenium