title: Nonaqueous phase synthesis of copper nanoparticles.
abstract: Copper nanoparticles were synthesized in a nonaqueous solution of cetyltrimethylammonium bromide with isopropanol as a solvent. Cetyltrimethylammonium bromide in isopropanol is observed to play a role as a catalyst where isopropanol is the reducing agent. The surface plasmon band characteristic for Cu nanoparticles can be observed at approximately 560 nm in the UV-visible spectra at molar ratios for Cu2+: cetyltrimethylammonium bromide of 1:15 and 1:30. On the other hand, at molar ratios of 1:0.25 and 1:1 the presence of peak at approximately 310 nm can be attributed to oligomeric clusters of Cu0. Formation of Cu0 was further confirmed from the X-ray diffraction analysis. The diffractograms exhibited peaks at 2theta = approximately 41.6 degrees, approximately 51.6 degrees, and approximately 74.3 degrees, corresponding to Cu0. At lower concentration of cetyltrimethylammonium bromide (i.e., Cu2+: cetyltrimethylammonium bromide = 1:0.25) higher degree of size dispersity (particles between approximately 5-20 nm) can be noted from transmission electron micrograph. On the other hand, at the highest concentration of cetyltrimethylammonium bromide (i.e., Cu2+: cetyltrimethylammonium bromide = 1:30), formation of finer sized particles with a lower degree of size variation, approximately 2-10 nm, can be observed.
authors.affiliation: Department of Chemistry, University of Pune, Pune, India.
authors.forename: Anjali A
authors.initials: AA
authors.lastname: Athawale
authors.forename: Prachi P
authors.initials: PP
authors.lastname: Katre
authors.forename: Megha B
authors.initials: MB
authors.lastname: Majumdar
mesh_terms: D019840:2-Propanol / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D003300:Copper / Q000032:analysis / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods; D043942:Nanotubes / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D044367:Phase Transition; D012997:Solvents / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D002593:Cetrimonium Compounds; D012997:Solvents; D014867:Water; D003300:Copper; D019840:2-Propanol; D000077286:Cetrimonium