...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical Materials >Thermal precipitation of silver nanoparticles and thermoluminescence in tellurite glasses
【24h】

Thermal precipitation of silver nanoparticles and thermoluminescence in tellurite glasses

机译：碲酸盐玻璃中银纳米粒子的热沉淀和热致发光

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Silver metal and/or oxide precipitation of nanoparticles in thermally treated Ag-doped tellurite glasses was studied by optical absorption (OA) and transmission electron microscopy (TEM). The Lorentzian adjusted silver nanoparticles plasma resonance OA band was compared to the Drude model approach. The silver nanoparticles size distribution on the surface rather than in the bulk was determined by TEM. A model for the metallic silver precipitation is proposed. The characterization of the formation of silver nanoparticles was carried out with differential thermal analysis (DTA) to determine the glass transition temperature (Tg) and of crystallization (Tc). Previously γ-irradiated samples exhibited thermoluminescence (TL) peaks and the defect centers TeOHC, NBOHC and TeEC were identified by electron paramagnetic resonance (EPR), but no Ag° signal was detected. The silver nanoparticles are known to introduce desired third-order optical nonlinearities in the composites, at wavelengths close to the characteristic surface-plasmon resonance of the metal precipitates. An increase of the glass density and refractive index with increasing AgNO_3 content was observed.
机译：通过光吸收（OA）和透射电子显微镜（TEM）研究了在经过热处理的掺银碲酸盐玻璃中纳米颗粒的银和/或氧化物的沉淀。将洛伦兹调整的银纳米颗粒等离子体共振OA带与Drude模型方法进行了比较。通过TEM确定在表面而不是在主体中的银纳米颗粒尺寸分布。提出了金属银沉淀的模型。用差热分析（​​DTA）对银纳米颗粒的形成进行表征，以确定玻璃化转变温度（Tg）和结晶度（Tc）。以前，被γ辐照的样品显示出热致发光（TL）峰，并且通过电子顺磁共振（EPR）识别了缺陷中心TeOHC，NBOHC和TeEC，但未检测到Ag°信号。已知银纳米颗粒在接近金属沉淀物的特征性表面等离子体共振的波长处在复合物中引入所需的三阶光学非线性。观察到玻璃密度和折射率随着AgNO_3含量的增加而增加。

著录项

  • 来源
    《Optical Materials》 |2011年第12期|p.1884-1891|共8页
  • 作者

    J.M. Giehl; W.M. Pontuschka; L.C. Barbosa; E.F. Chillcce; Z.M. Da Costa; S. Alves;

  • 作者单位

    Instituto de Fisica da Universidade de Sao Paulo Rua do Matao 187 - Travessa R 05508-090 Sao Paulo SP Brazil;

    Laboratorio de Materials UN1CAMP Box 6165 13083-970 Campinas SP Brazil;

    LaProMaV Universidade Federal de Juiz de Fora Juiz de Fora MC 36036-330 Brazil;

    Instituto de Fisica da Universidade de Sao Paulo Rua do Matao 187 - Travessa R 05508-090 Sao Paulo SP Brazil Departamento de Ciencias Exatas e da Terra Universidade Federal de Sao Paulo Diadema Sao Paulo Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tellurite glasses; silver nanoparticles; optical absorption; EPR; TL;

    机译：碲酸盐眼镜银纳米颗粒;光吸收EPR;TL;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号