Shaped silver nanoparticles with sphere, wire and dendrite were prepared by sonoelectrochemical deposition from an aqueous solution of AgNO3 in the presence of ethylenediaminetetraacetic acid disodium salt (EDTA) and ...Shaped silver nanoparticles with sphere, wire and dendrite were prepared by sonoelectrochemical deposition from an aqueous solution of AgNO3 in the presence of ethylenediaminetetraacetic acid disodium salt (EDTA) and polyvi- nylpyrrolidone (PVP). The diameter of spherical silver particles was about 30 nm. The diameter of the silver nanowires was also about 30 nm and the length was 200-900 nm. The dendrites were synthesized with the concentration of silver solution increasing. Silver nanoparticles were characterized by transmission electron microscope (TEM), X-ray powder diffraction (XRD), scanning probe microscope (SPM) and UV-vis absorption spectrum. XRD patterns revealed that silver particles were of face-centered cubic structure. UV-vis absorption spectra indicated that different morphology and size of silver par- ticles could influence the optical properties.展开更多
文摘 通过声电沉积工艺在炭 炭复合材料表面制备了生物活性透钙磷石涂层,用XRD、EDAX及Raman光谱对炭 炭复合材料改性前后的表面特征进行了研究。结果表明,与传统电结晶工艺相比,声电沉积工艺所制透钙磷石涂层晶面间距减小,炭 炭复合材料与透钙磷石涂层间形成了C O P、C O H等化学键合。同时探讨了成键机理,认为声电沉积工艺是声电表面改性、声化学合成以及电结晶工艺的有机组合。
基金[This work was financially supported by the National Natural Science Foundation of China (No. 50271046).]
文摘Shaped silver nanoparticles with sphere, wire and dendrite were prepared by sonoelectrochemical deposition from an aqueous solution of AgNO3 in the presence of ethylenediaminetetraacetic acid disodium salt (EDTA) and polyvi- nylpyrrolidone (PVP). The diameter of spherical silver particles was about 30 nm. The diameter of the silver nanowires was also about 30 nm and the length was 200-900 nm. The dendrites were synthesized with the concentration of silver solution increasing. Silver nanoparticles were characterized by transmission electron microscope (TEM), X-ray powder diffraction (XRD), scanning probe microscope (SPM) and UV-vis absorption spectrum. XRD patterns revealed that silver particles were of face-centered cubic structure. UV-vis absorption spectra indicated that different morphology and size of silver par- ticles could influence the optical properties.
