Synthesis and study of silver nanoparticle and conductive paste

Silver nanoparticles with narrow distribution were prepared by aqueous chemical reduced route in presence of poly-acrylic acid ammonium as capping agents,hydrazine hydrate or glucose as reducing agents.The morphology and crystal structure of silver nanoparticles were demonstrated by transmission electron microscopy and X-ray powder diffraction.The size distribution and the stability of as-synthesized silver nanosol were studied by the UV-Vis spectrophotometer.The obtained silver nanoparticles was added into glycerol,coated on a glass slide and sintered.The results show that the stability of as-synthesized silver nanosol is perfect.Ammonia and reducing agents play an important role in the morphology and size distribution of silver nanopaticels.Sizes of silver nanoparticles reduced by hydrazine hydrate are 10 nm on average with a narrow distribution from 6 nm to 15 nm.The surface shape and the conductivity of silver nanoparticles after sintering are perfect and the volume resistivity is about 3.5×10–5 ·cm.