Introduction Of Silver Nanoparticles Research Articles

Coating of ZnO nanorods with nanosized silver particles by electroless plating process

Metallodielectric composites of silver-coated ZnO nanorods were prepared comprising the formation of ZnO nanorod substrate by aqueous solution reaction and the deposition of silver nanoparticles by electroless plating technique. Silver-coated ZnO nanorod composites were characterized with electron microscopy and X-ray diffraction. The results showed that metallic Ag of high crystallinity covered on the surfaces of hexagonal ZnO nanorods. The addition of silver nanoparticles had an effect on the infrared emissivity properties of the composites. The infrared emissivity value of ZnO nanorods was obviously decreased by the introduction of silver nanoparticles onto the ZnO surface. By controlling the silver deposition, the infrared emissivity properties could be tailored.

Effect of silver nanoparticles on the dynamic crystallization behavior of nylon‐6

AbstractThe effect of introducing silver nanoparticles on the rheological properties and dynamic crystallization behavior of nylon‐6 was investigated. The nanocomposites showed slightly higher viscosity than pure nylon‐6 in the low‐frequency range even at an extremely low loading level of the silver particles (0.5–1.0 wt %). The nanoparticles had a more noticeable effect on the storage modulus than on the loss modulus of a nylon‐6 melt and reduced its loss tangent. They increased the crystallization temperature of nylon‐6 by about 14 °C and produced a sharper crystalline peak. The silver nanoparticles promoted the crystallization of nylon‐6, and their effect on the dynamic crystallization of nylon‐6 at 200 °C was more notable at a lower shear rate and at 190 °C at a higher frequency. Nylon‐6 produced large spherulitic crystals, but the nanocomposites showed a grainy structure. In addition, the silver nanoparticles reduced the fraction of the α‐form crystal but increased that of the γ‐form crystal. The nanocomposites crystallized at 190 °C showed a lower melting temperature than nylon‐6 by about 3 °C, whereas the nanocomposites crystallized at 200 °C showed almost the same melting temperature. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 790–799, 2004