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Dual‐Activity Controlled Asymmetric Synthesis of Superconducting Lead Hemispheres**
Author(s) -
Lu X. L.,
Wang W.,
Zhang G. Q.,
Li X. G.
Publication year - 2007
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200700011
Subject(s) - materials science , fabrication , nanotechnology , superconductivity , pulmonary surfactant , bromide , chemical engineering , nanostructure , colloid , organic chemistry , condensed matter physics , chemistry , physics , medicine , alternative medicine , pathology , engineering
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.