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Synthesis of Single‐Crystalline Platinum Nanorods within a Soft Crystalline Surfactant–Pt II Complex
Author(s) -
Krishnaswamy Rema,
Remita Hynd,
ImpérorClerc Marianne,
Even Catherine,
Davidson Patrick,
Pansu Brigitte
Publication year - 2006
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600127
Subject(s) - nanorod , platinum , transmission electron microscopy , dispersity , materials science , pulmonary surfactant , ammonium bromide , chemical engineering , lamellar structure , inorganic chemistry , chemistry , crystallography , nanotechnology , polymer chemistry , organic chemistry , catalysis , engineering
10.1002/cphc.200600127.abs Single‐crystalline platinum nanorods, monodisperse in diameter, are synthesized through a simple process at room temperature, in cetyltrimethyl ammonium bromide (CTAB) solution. The complexation of the CTA + surfactant ion with tetrachloroplatinate in the presence of hexanol leads to the formation of a precipitate with a lamellar crystalline structure. The reduction of Pt II metal ions to Pt 0 is carried out using γ radiolysis. Transmission electron microscopy (TEM) observations of the nanoparticles extracted from the solution, three weeks after radiolysis, revealed single‐crystalline Pt nanorods, monodisperse in diameter (3–4 nm) and 20–60 nm long. By following the shape of the nanorods at various stages of the growth, it was found that the single‐crystalline nanorods grow by coalescence of spherical seeds 3–4 nm in diameter. This suggests an aggregative mechanism similar to that recently observed for silver particles in solution.