Cargando…

Hierarchical ZnO Nanostructures with Blooming Flowers Driven by Screw Dislocations

Hierarchical ZnO nanostructures with a large yield were fabricated by a simple thermal evaporation method. For the first time, novel ZnO flowers were observed blooming at certain sites of a variety of spines, identified as Zn-terminated polar (0001) planes or tips. The spines for as-synthesized hier...

Descripción completa

Detalles Bibliográficos
Autores principales: Huang, Chengzi, Shi, Run, Amini, Abbas, Wu, Zefei, Xu, Shuigang, Zhang, Linfei, Cao, Wei, Feng, Jiangwei, Song, Haisheng, Shi, Yantao, Wang, Ning, Cheng, Chun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4316161/
https://www.ncbi.nlm.nih.gov/pubmed/25648112
http://dx.doi.org/10.1038/srep08226
Descripción
Sumario:Hierarchical ZnO nanostructures with a large yield were fabricated by a simple thermal evaporation method. For the first time, novel ZnO flowers were observed blooming at certain sites of a variety of spines, identified as Zn-terminated polar (0001) planes or tips. The spines for as-synthesized hierarchical structures can be nanowires, nanobelts, nanodendrites, nanobrushes, etc. This growth phenomenon determines the key role of polar sites in the fabrication of hierarchical structures. The spiral feature of ZnO flowers indicates an unusual screw dislocation driven growth mechanism, which is attributed to a high concentration of Zn vapor.