用户登录
期刊信息
  • 主管单位:
  • 中国科学技术协会
  • 主办单位:
  • 中国仪器仪表学会、上海光学仪器研究所、中国光学学会工程光学专业委员会
  • 主  编:
  • 庄松林
  • 地  址:
  • 上海市军工路516号上海理工大学《光学仪器》编辑部
  • 邮政编码:
  • 200093
  • 联系电话:
  • 021-55270110
  • 电子邮件:
  • gxyq@usst.edu.cn
  • 国际标准刊号:
  • 1005-5630
  • 国内统一刊号:
  • 31-1504/TH
  • 邮发代号:
  • 单  价:
  • 15.00
  • 定  价:
  • 90.00
双金属核壳纳米结构中荧光单分子的表面能量转移及金属操控自发辐射效应
Surface energy transfer and metal regulated spontaneous emission of single fluorescent molecules in bimetallic core-shell nanostructures
投稿时间:2021-12-24  
DOI:10.3969/j.issn.1005-5630.2022.004.008
中文关键词:  核壳纳米结构  局域表面等离子体共振  时域有限差分法  表面能量转移
英文关键词:core-shell nanostructures  local surface plasmon resonance (LSPR)  finite difference time domain (FDTD) method  surface energy transfer (SET)
基金项目:
作者单位E-mail
李朝 上海景谱信息科技有限公司,上海 200433  
周军 上海理工大学 光电信息与计算机工程学院,上海 200093  
俞宪同 上海理工大学 光电信息与计算机工程学院,上海 200093 xtyu@usst.edu.cn 
摘要点击次数: 2369
全文下载次数: 1558
中文摘要:
      贵金属表面附近的荧光分子因其表面等离子体共振的影响,荧光发射特性发生显著变化,被广泛应用在荧光探针等纳米器件的设计、开发中。荧光分子与金属之间的能量转移机制是设计此类荧光探针的基础。使用时域有限差分(FDTD)方法,对Au/SiO2/Ag核壳纳米复合结构的等离子体杂化场中荧光单分子的表面能量转移(SET)效应和金属操控自发辐射效应进行了理论仿真研究。研究了金核和银壳共同作用时,荧光分子的SET和金属调控自发辐射过程随荧光分子位置及分子偶极矩取向的变化规律。计算结果表明,由于金核和银壳之间的局域表面等离子体共振杂化耦合,荧光分子与金属间的能量转移效率与距离d呈现出10次方的关系,这一结果明显区别于常规的荧光共振能量转移(FRET)效应,较之单金属结构的SET效应更加剧烈。这一结果有希望在生物光子学领域的纳米级局域光源的创建和生物分子的检测中得到应用。
英文摘要:
      The emission characteristics of fluorescent molecules near the surface of noble metals have changed significantly due to the influence of surface plasmon resonance (SPR). They are widely used in the design of nano-devices such as fluorescent probes. The energy transfer mechanism between fluorescent molecules and metals is the basis for the design of such fluorescent probes. Therefore, in this paper, surface energy transfer (SET) and metal regulated spontaneous emission effect of single fluorescent molecules in the Au/SiO2/Ag core-shell nanostructure were theoretically simulated by using finite difference time domain (FDTD) method. The SET between fluorescent molecules and the hybrid plasmonic mode was studied. The results showed that due to the local surface plasmon resonance coupling between gold core and silver shell, the energy transfer efficiency between fluorescent molecules and metals shows a d10 relationship, which d is the distance from the fluorescent molecules to gold surface. That result is obviously different from the conventional FRET effect and the SET effect of single metal structure. It is expected to be applied in the development of nano light sources and biosensors.
HTML   查看全文  查看/发表评论  下载PDF阅读器
关闭