Mineralization of Gold Nanoparticles in a Block Copolymer Microemulsion | Zendy

Spatz Joachim P. | Zendy; Mößmer Stefan | Zendy; Möller Martin | Zendy

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Mineralization of Gold Nanoparticles in a Block Copolymer Microemulsion

Author(s) -

Spatz Joachim P.,

Mößmer Stefan,

Möller Martin

Publication year - 1996

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.19960021213

Subject(s) - micelle , microemulsion , copolymer , chemical engineering , particle size , polystyrene , nanoparticle , colloidal gold , materials science , chemistry , polymer , polymer chemistry , nanotechnology , aqueous solution , pulmonary surfactant , organic chemistry , composite material , engineering

Controlled mineralization of gold nanoparticles has been performed in a microemulsion of polystyrene‐ block ‐poly(2‐vinylpyridine). The starting point was the formation of a thermodynamically stable dispersion of HAuCl 4 in inverse micelles of the block copolymer in toluene, which became metastable when the gold was reduced. Kinetic control of the transformation allowed the following stages of the mineralization/coagulation process to be stabilized: 1) one gold particle per micelle, 2) aggregated micelles containing two or three gold particles, and 3) a state in which empty micelles coexist with larger polymer‐stabilized gold particles. Distinctive variations in the spectra were observed depending on the particle size and whether two particles had formed a couple with orientation‐dependent dipolar interactions.

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