光学学报, 2014, 34 (11): 1116001, 网络出版: 2014-10-13  

三角形银纳米颗粒淬灭八羟基喹啉铝发光研究

Research of the Emission Quenching of Tris-(8-Hydroxyquinoline) Aluminum by Silver Nanoprisms
作者单位
1 巢湖学院电子工程与电气自动化学院, 安徽 合肥 238000
2 四川大学物理科学与技术学院, 四川 成都 610064
摘要
基于光学天线原理,通过实验和数值计算研究了三角形银纳米颗粒膜对八羟基喹啉铝(Alq3)发光的猝灭。Alq3发光猝灭是由于光子能量与三角形银纳米颗粒的面内电四极子发生能量共振耦合。实验中,猝灭因子为0.25~0.5。三角形银纳米颗粒密度增加形成较多二聚体和三聚体等,使近场电场场强增加,激发效率增加,导致猝灭因子减小。数值模拟得到三角形银纳米颗粒对Alq3的平均猝灭因子为0.44,与实验结果基本一致。研究结果为基于三角形银纳米颗粒的分子传感、表面等离子体光学成像等应用提供了有价值的参考。
Abstract
Based on the optical antenna theory, the emission quenching of tris-(8-hydroxyquinoline) aluminum (Alq3) by silver nanoprisms is investigated by experiments and numerical simulations. The emission quenching is attributed to the coupling between the emission of Alq3 and the in-plan electric quadrupole resonance of silver nanoprisms. In experiments, the quenching factor is 0.25~0.5. As the density of silver nanoprisms on the substrate increases, the dimers and trimers increase. It enhances the near-field electric field, improves the excitation efficiency and decreases the quenching factor. Numerically, the quenching factor is about 0.44. It is agreement on experimental results. The study is significant to apply the nanoprism for molecular sensor and surface-plasmon-assistant image.

叶松, 余建立, 王向贤, 许明坤, 侯宜栋, 张志友, 杜惊雷. 三角形银纳米颗粒淬灭八羟基喹啉铝发光研究[J]. 光学学报, 2014, 34(11): 1116001. Ye Song, Yu Jianli, Wang Xiangxian, Xu Mingkun, Hou Yidong, Zhang Zhiyou, Du Jinglei. Research of the Emission Quenching of Tris-(8-Hydroxyquinoline) Aluminum by Silver Nanoprisms[J]. Acta Optica Sinica, 2014, 34(11): 1116001.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!