Nanoparticulate copper--routes towards oxidative stability.
A modified polyol-based reduction method in ethylene glycol that incorporates poly(N-vinylpyrrolidone) (PVP, M(av) = 10,000; 40,000; 55,000) as polymeric anti-agglomerant alongside a reducing additive (N(2)H(4) x H(2)O, NaBH(4), NaH(2)PO(2) x H(2)O) has been employed to investigate the influence of synthetic parameters on the purity, morphology and stability of an array of polymer-coated copper nanoparticles. While data point to ethylene glycol being capable of acting as a reductant in this system, the use of NaH(2)PO(2) x H(2)O as co-reductant in tandem with the presence of PVP (M(av) 40,000) has rendered nanoparticles with a mean size distribution of 9.6 +/- 1.0 nm that exhibit stability towards oxidation for several months. These data allow us to probe fundamentally how oxidatively stable nano-copper might be achieved.
Engels
Volker
V
The University Chemical Laboratories, Lensfield Road, Cambridge CB2 1EW, UK.
Benaskar
Faysal
F
Jefferson
David A
DA
Johnson
Brian F G
BF
Wheatley
Andrew E H
AE
D003300:Copper / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011760:Pyrrolidinones / Q000737:chemistry
D010710:Phosphates; D011760:Pyrrolidinones; D011092:Polyethylene Glycols; C042670:N-vinyl-2-pyrrolidinone; D003300:Copper; C018279:sodium phosphate