This work was supported by the National Natural Science Foundation of China (50421201 and 10334090) and the National Basic Research Program of China (2006CB601003 and 2006CB922005).
Dual-Activity Controlled Asymmetric Synthesis of Superconducting Lead Hemispheres**†
Article first published online: 20 JUL 2007
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 17, Issue 13, pages 2198–2202, September, 2007
How to Cite
Lu, X. L., Wang, W., Zhang, G. Q. and Li, X. G. (2007), Dual-Activity Controlled Asymmetric Synthesis of Superconducting Lead Hemispheres**. Adv. Funct. Mater., 17: 2198–2202. doi: 10.1002/adfm.200700011
- Issue published online: 23 AUG 2007
- Article first published online: 20 JUL 2007
- Manuscript Revised: 25 MAR 2007
- Manuscript Received: 3 JAN 2007
- National Natural Science Foundation of China. Grant Numbers: 50421201, 10334090
- National Basic Research Program of China. Grant Numbers: 2006CB601003, 2006CB922005
A binary surfactant mixture of cetyltrimethylammonium bromide and polyvinyl pyrrolidone is used as the tailoring agent in the fabrication of lead micro/nanostructures. Electron microscopy studies indicate that the morphologies of the products can be efficiently controlled in this simple one-step synthetic procedure. Intriguingly, well-defined asymmetric functional colloids, Pb hemispheres, are obtained for the first time, and a dual-activity-controlled growth process is proposed to explain their formation. The magnetization measurements show that the as-prepared samples are superconducting with the same transition temperature as bulk Pb. These findings prove the unique morphology tailoring efficacy of mixed surfactants, which could be used to obtain more variform structures or architectures in the fabrication of advanced materials.