The Preparation And UV-vis Absorption Of Nano Copper

Because of the special physical and chemical properties, the nanocopper materialis a kind of important functional materials with good performance in many aspects,such as the electricity conducting, the catalysis, the lubrication, and the antisepsis. Inthis work, glycol and hydrazine hydrate were employed as solvent and reductantrespectively to prepare a series of copper sol. It was found that when glycol was usedas solvent, the nanocopper of small sizes, perfect uniformity, and fine dispersion alsocan be obtained even without the addition of surfactant, and it had the characteristicsof plasmon resonance. The optimum condition influencing the absorption peak ofplasmon resonance was attained by varying the reaction condition.Due to the excitation of plasmon resonance, metal particles can generate stronglocal field, and currently it is a hotspot in nanomaterials area. When the plasmonresonance occures due to the interaction between the incident light and thenanoparticles, it can give rise to the strong absorption of nanoparticles to incidentlight and the enhancement in the intensity of the electric field around the nanoparticles.At present, a large number of works, aiming at the issue metioned above, especially inthe region of biological molecular detection, have been done. In this chapter, theoptical properties of moleculars and metal particles were discussed in detail by theinvestigation on supermolecules consisting of nanocopper particles and methyl orangedye molecules, i.e., azo dye methyl orange owning storage performance in thesurrounding of nanocopper particles. It was noted that because of the effect of thenanocopper particles, the characteristic peak position of dye methyl orangeblueshifted, which was monitored by the UV-Vis absorption spectra. Thisphenomenon has the potential for the study on dielectric materials with theperformance of high density optical data storage.The quantum size effect and surface effect of metal nanoparticles were quiteobvious. The complex interaction between metal nanoparticles and oxide affected thesurface electromagnetic field distribution of the nanoparticles, which influenced the plasmon resonnace of metal nanoparticles. Because the incident wave was absorbedand transmitted selectly, metal nanoparticles dispersed in Inorganic oxide thin filmspossessed excellent nonlinear optical properties, and materials with these propertieshad a promissing future and wide application in optical communication. The SiO2particles with different sizes were prepared by the ammonia catalytic method of TEOS.And it showed excellent photonic crystal properties. The plasmon resonanceabsorption peak of the system of nanocopper redshifted and widened due to the effectof the silica solution and the photonic crystal film.