Journal
NANO LETTERS
Volume 9, Issue 6, Pages 2239-2242Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl900080f
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Funding
- Robert A. Welch Foundation
- Air Force Office Scientific Research [FA8650-05-D-5807]
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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.
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