采用St(o)ber方法,以AgNO3与柠檬盐钠还原反应所制备出的Ag纳米颗粒为种子,合成了Ag/SiO2核-壳结构的亚微米球.用透射电镜(TEM)观测所得产物的形貌和大小,并用光吸收谱仪测试了Ag纳米颗粒的表面等离子体共振(SPR)引起的光吸收峰.
Ag/SiO2 core-shell sub-micron spheres were synthesized via the St(o)ber process,using the silver nanoparticles as the seeds.The Ag nanoparticles were synthesized by reducing AgNO3 with sodium citrate in water.Transmitting electron microscopy(TEM)was used to investigate the morphology of the resulting particles.Optical absorption bands of their spectra reveal the special optical behavior due to the surface plasmon resonance of Ag nanoparticles.
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