Synthesis And Structural Characterization Of C/Cu Shell/Core Nano Materials

Cu nanomaterials show new great prospects in some application fields such as conductive ink, efficient catalysts and lubricants. However, the sensitive surface activities contribute to easily oxidization of Cu nano materials seriously which limit its application fields and values.In this paper, C/Cu shell/core nanowires and nanoparticles deposited on quartz glass, which are synthesized by organic metal vapor deposition using acetylacetone copper (Cu(acac)2) as the precursor carried by Hydrogen, are characterized by XRD, Raman, SEM, TEM, EDS, PL and UV. Application of C/Cu shell/core nanoparticles in conductive ink is investigated by ink-jet printer (Dimatix283) and homemade screen printing.Conclusions of main researches show as follows:1. Results changed with increasing deposition temperature, firstly, Color of C/Cu shell/core nanowires is tawny on the quartz glass when the deposition temperature is400℃, then the products turn to dark red at450℃, they include some approximately200nm core/shell particles mixed with a small amount of length of about1um core/shell nanorods mainly. After temperature rising, nanowires disappear and nanoparticles appear gradually. When the deposition temperature is up to600℃, products of black deposition are formed by nanoparticles under100nm.2. It finds that short rods appear on the quartz according to study the influence of reaction time on the morphology of the product. The short rod, with rough surface, has adsorbed many tiny particles, which shape is mace-like, but the bottom is smoother with300nm in diameter. Lengths of mace-like nanorods increase with the reaction time marching longer. When the reaction time is at4h, small particles disappear adsorbed on the nanowires.3. The more quantity of Cu(acac)2, the longer length of the nanowires. Morphologies change with the variation of quantity of source and length of nanowires. Much more the mass of Cu(acac)2, the more C source and Cu source will be obtained. Changes of morphologies of nanowires indicate that Cu atoms permeate the C shell and form the longer Cu nanowires as the core through the Ostwald ripening mechanism.4. The optical properties of C/Cu shell/core nanowires and nanoparticles have close relationship with the morphology of particles and the thickness of the carbon layers, among which, compared with the nanoparticles surface plasma resonance (SPR) absorption peak, slight red shift has been found in the surface of plasma resonance absorption peaks of the nanowires (SPR), moreover, the SPR redshift is more fierce as outside wrapped carbon layer is thicker.5. Using inkjet (Dimatix283) printer study the conductivity of C/Cu shell nanoparticles preliminarily, conductive ink of C/Cu shell/core nanoparticles stable dispersed in ethylene glycol can print on different kinds of substrates.