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Ultrasmall Copper Nanoparticles from a Hydrophobically Immobilized Surfactant Template

2009; American Chemical Society; Volume: 9; Issue: 6 Linguagem: Inglês

10.1021/nl900080f

1530-6992

Jonathan J. Brege, Christopher E. Hamilton, Christopher A. Crouse, Andrew R. Barron,

Nanotechnology research and applications

Ultrasmall copper nanoparticles are produced by N,N,N′,N′-tetramethyl-p-phenylenediamine (TMPDA) reduction of aqueous Cu2+ on a hydrophobically immobilized sodium dodecylbenzenesulfonate (SDBS) surfactant template in the presence of sodium citrate at room temperature. Single-walled carbon nanotubes (SWNTs) act as a scaffold controlling the size of the SDBS micelle, which in turn confines a limited number of copper ions near the nanotube surface. TMPDA reduction forms copper nanoparticles as confirmed by X-ray photoelectron spectroscopy and electron diffraction, whose size was determined by atomic force microscopy and transmission electron microscopy to be approximately 2 nm. Particles formed in the absence of the SWNT immobilizer range from 2 to 150 nm.