银纳米颗粒/玻璃复合材料的吸收光谱特征  

ABSORPTION SPECTRA CHARACTERISTICS OF Ag NANOPARTICLES/GLASS COMPOSITES

作　　者：刘会欣[1] 杨修春[1] 赵建富[1] 李玲玲[1] 黄敏[1] 

机构地区：[1]同济大学材料科学与工程学院,上海200092

出　　处：《硅酸盐学报》2010年第10期1922-1926,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50672069);上海市基础研究重点(08JC-1419000)资助项目

摘　　要：利用离子交换结合热处理方法,制备出Ag纳米颗粒掺杂硅酸盐玻璃复合材料。通过改进的Mie理论拟合了不同制备条件下Ag纳米颗粒的吸收光谱,得到了它们的尺寸和体积分数。拟合结果表明:在热处理条件相同时,离子交换时间越长,样品中Ag纳米颗粒的尺寸越大,体积分数越高;在离子交换条件相同时,随着后续热处理时间的延长或温度升高,样品中Ag纳米颗粒的尺寸变大,体积分数提高。相比于空气热处理,氢气热处理可以显著降低样品中Ag纳米颗粒的形成温度和时间。氢气气氛下形成的Ag纳米颗粒小于空气气氛下形成的Ag纳米颗粒,导致其等离子体共振吸收峰相对空气中热处理的样品发生蓝移。Silver nanoparticles/silicate glass composite materials were fabricated by ion-exchange and subsequently thermal treatment.According to the modified Mie theory,the size and volume fraction of Ag nanoparticles were obtained by fitting the absorption spectra of samples under different preparation conditions.The results show that the longer the ion-exchange time,the larger the size and volume fraction of Ag nanoparticles if the ion-exchanged samples were subsequently annealed at the same conditions.The size and volume fraction of Ag nanoparticles in the ion-exchanged sample increase with the extension of annealing duration or the increase of annealing temperature.Ag nanoparticles with smaller size and higher volume fraction in ion-exchanged sample can be formed at lower annealing temperature and shorter annealing time in H2 atmosphere than in air.The smaller Ag nanoparticles prepared in H2 atmosphere make its surface plasma resonance peak blue-shift compared to that prepared in air.

关 键 词：离子交换 热处理 银纳米颗粒 等离子体共振 MIE理论 

分 类 号：TB333[一般工业技术—材料科学与工程]