A microemulsion method for preparing colloidal copper nanoparticles in
microemulsion is reported. The obtained copper carbonate CuCO3⋅Cu(OH)2 nanoparticle
and copper oxide CuO nanoparticle were characterized by powder X-ray diffraction
(XRD), atomic force microscopy(AFM),transmission electron microscopy (TEM) and Xray
fluorescent(XRF) analysis, the purity of material and average particle size about 10
nanometer.. A microemulsion is thermodynamically stable ,optically isotropic derision
of two immiscible liquids consisting of nano-size (CuSO4.5H2O) domains of one or
both liquids in the other (white oil),stabilized by an interfacial film of the surface-active
molecules. The materials mixed to have new immiscible solution , add chemical materials
to reduce surface tension and to reduced interfacial atomic bonds to very low level , the
very fine dispersed spherical micelles in microemulsion are thermodynamically stable
due to a combination of very low interfacial tension very small nanoparticles diameter of
(2-5) nm. Addition another of chemical material as react agent or reduced agent and
precipitate agent to product final material CuCO3⋅Cu(OH)2.Synthesis of monodispersed
CuCO3⋅Cu(OH)2 nanoparticles with refractive index similar to glass plates by using
ultrasonic spray pyrolysis technique by method .Yielding homogeneous ,low defect thin
films of high transparency ,that can be used as color filters for liquid crystal displays .