Optical properties of Ag nanoparticle-glass composites

Yang Xiu-chun
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Abstract

Silver nanoparticles doped glass composites were prepared by ion-exchange plus thermal treat- ment.The optical properties of silver nanoparticle glass composites were investigated by UV-VIS spec- trophotometer and Z-Scan technique.The results show that the optimal Ag~+/Na~+ ion-exchange tem- perature is between 3100C and 380℃,higher ion-exchange temperature or higher AgNO_3 concentration in molting bath or longer ion-exchange period favors the introduction of more Ag~+ ions into soda-lime silicate glass.The higher Ag~+ concentration introduced into silicate glass is,the larger is the volume fraction of Ag nanoparticles in glass after annealing.Fe2+ ion in silicate glass favors the formation of Ag nanoparticles.Ag nanoparticles size and volume fraction become larger,and plasma resonant absorption shows red-shit with increasing annealing temperature and extending annealing time.The off-resonant third-order optical susceptibility of Ag nanoparticle-glass composite exhibits a value of 1.16×10~(-10) esu where the real part is-1.15×10~(-10)esu,and imaginary part is 1.4×10~(-11)esu.
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银纳米颗粒-玻璃复合材料的光学性质
采用离子交换+热处理法制备了银纳米粒子掺杂玻璃复合材料。采用紫外可见分光光度计和z扫描技术研究了银纳米颗粒玻璃复合材料的光学性能。结果表明:最佳的Ag~+/Na~+离子交换温度在3100C ~ 380℃之间,较高的离子交换温度、较高的脱毛液中AgNO_3浓度或较长的离子交换时间有利于更多的Ag~+离子引入钠钙硅酸盐玻璃。引入的Ag~+浓度越高,退火后玻璃中Ag纳米粒子的体积分数越大。硅酸玻璃中Fe2+离子有利于银纳米粒子的形成。随着退火温度的升高和退火时间的延长,银纳米粒子的尺寸和体积分数逐渐增大,等离子体共振吸收呈红色。银纳米颗粒-玻璃复合材料的非共振三阶光磁化率为1.16×10~(-10) esu,其中实部为is-1.15×10~(-10)esu,虚部为1.4×10~(-11)esu。
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