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Freeze‐Align and Heat‐Fuse: Microwires and Networks from Nanoparticle Suspensions
Author(s) -
Zhang Haifei,
Lee JunYoung,
Ahmed Adham,
Hussain Irshad,
Cooper Andrew I.
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200705512
Subject(s) - materials science , colloid , polystyrene , particle (ecology) , polymer , nanoparticle , nanotechnology , aqueous solution , surface charge , chemical engineering , metal , fuse (electrical) , composite material , metallurgy , chemistry , oceanography , engineering , geology , electrical engineering
Staying in line : Aqueous colloids (particle diameter 10–500 nm) are directionally frozen and freeze‐dried to produce aligned microwires, which can be fused together by heat treatment with complete retention of the morphology. The method is generic: by controlling surface charge, the approach can be applied to metals, metal oxides, and organic polymers. A single microwire formed by the assembly of polystyrene colloids is shown.