• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >High spectral field enhancement and tunability in core–double shell metal–dielectric–metal spherical nanoparticles
【24h】

High spectral field enhancement and tunability in core–double shell metal–dielectric–metal spherical nanoparticles

机译：芯双壳金属介质 - 介质 - 金属纳米颗粒中的高光谱场增强和可调性

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work we have developed full Mie theory for spherical core–double shell NPs, considering the boundary conditions of the electric and magnetic fields at each interface, to study plasmon resonances, optical extinction and spectral field enhancement of a generalized metal–dielectric–metal NPs. Keeping gold as the outer metal shell, calculations were carried out for different core metals (gold, silver, copper and aluminium) and different intermetallic dielectrics (silica, titanium dioxide, aluminium oxide and water). The metal dielectric function includes free and bound electron size corrections. Theoretical results show that the structures Al–SiO _(2) –Au, Ag–SiO _(2) –Au and Cu–SiO _(2) –Au have field enhancement maxima factors of 33, 30 and 20 respectively in the outer region, all larger than that for Au–SiO _(2) –Au (18). For the intermetallic region, field enhancement factors between 459, 960 and 841 are obtained for the first three structures mentioned before, respectively, also larger than that for Au–SiO _(2) –Au (770). Spatial field enhancement was also calculated for both regions, for different core metals and fixed core–double shell size. A hybridization model specially developed for a core–double shell system allows an insightful interpretation of its plasmon resonances, field enhancement maxima and lack of symmetry in the outer region field distribution.
机译：在这项工作中，我们已经开发了全麦芯双壳NPS的全部MIE理论，考虑到各界面处的电场和磁场的边界条件，研究等离子体共振，光学消光和光谱场增强的广义金属介质金属NPS。保持金作为外金属壳，对不同的核心金属（金，银，铜和铝）和不同的金属间电介质（二氧化硅，二氧化钛，氧化铝和水）进行计算。金属介质功能包括自由和结合的电子尺寸校正。理论结果表明，结构Al-SiO_（2）-au，Ag-SiO_（2）-au和Cu-SiO _（2）-a分别在外部分别有33,30和20的现场增强最大因子区域，大于Au-SiO _（2）-au（18）的区域。对于金属间区域，对于之前提到的前三个结构，也可以大于Au-SiO _（2）-au（770）的前三个结构，获得459,960和841之间的现场增强因子。对于两个区域，对于不同的核心金属和固定芯双壳尺寸，也计算了空间场增强。专门为芯双壳系统开发的杂交模型允许对其等离子体共振，现场增强最大值和在外部区域场分布中缺乏对称性的富有富有洞察力的解释。

著录项

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