二维Bi_2Se_3晶体对罗丹明6G分子的荧光猝灭效应研究
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- 英文论文题名：Fluorescence Quenching Effect of Rhodanmine 6G on Two-Dimensional Bi_2Se_3 Crystals
- 论文作者：吴金雄 ; 刘忠范 ; 彭海琳
- 英文论文作者：Jinxiong Wu ; Zhongfan Liu ; Hailin Peng ; Center for Nanochemistry ; College of Chemistry and Molecular Engineering ; Peking University
- 年：2016
- 作者机构：北京大学化学与分子工程学院;
- 论文关键词：拓扑绝缘体 ; 二维晶体 ; 荧光猝灭 ; Bi_2Se_3
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十一分会：纳米材料与器件
- 语种：中文
- 分类号：TB30
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十一分会 ; 纳米材料与器件
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：108k
- 原文格式：D
- 会议级别：全国
摘要
以石墨烯和拓扑绝缘体为代表的狄拉克材料(Dirac Materials)是近几年新涌现的二维量子功能材料,其表面态载流子有效质量为零,能量和动量之间满足线性关系,需要用相对论狄拉克方程描述~[1]。石墨烯是由碳原子以sp~2杂化连接的单原子层构成的二维原子晶体,具有自旋简并的狄拉克锥型表面态;而拓扑绝缘体是一种全新的量子材料,具有绝缘性体能带结构和受时间反演对称性保护的自旋极化的金属表面态~[2]。石墨烯是良好的荧光猝灭基底,并被广泛研究~[3]。而拓扑绝缘体二维材料的荧光猝灭效应并未见报道。我们首次研究了拓扑绝缘体Bi_2Se_3二维晶体对其表面吸附的罗丹明6G分子的荧光猝灭效应,证明薄层Bi_2Se_3可以有效猝灭罗丹明6G分子的荧光,且随Bi_2Se_3二维晶体的厚度从单层增加到8层,荧光猝灭效应增强,并初步探讨了其荧光猝灭机理。
As two representatives of Dirac materials(a new functional quantum matter), graphene and topological insulator exhibit the similar band structure with massless and linearly dispersive surface states, which should be described by the relativistic Dirac equation. Graphene is an excellent substrate for fluorescence quenching and has been widely explored. However, the fluorescence quenching effect for two-dimensional(2D) materials of topological insulators has not been reported, yet. For the first time, we studied the fluorescence quenching effect of Rhodanmine 6G molecules on 2D Bi_2Se_3 crystals with the thickness ranged from 1 layer to 8 layers. It was found that the atomically-thin Bi_2Se_3 crystals can quench the fluorescence of the adsorbed Rhodamine 6G molecules, and the thicker Bi_2Se_3 crystals show more obvious quenching ability to Rhodanmine 6G molecules. A possible quenching mechanism of fluorescence resonance energy transfer was suggested.
As two representatives of Dirac materials(a new functional quantum matter), graphene and topological insulator exhibit the similar band structure with massless and linearly dispersive surface states, which should be described by the relativistic Dirac equation. Graphene is an excellent substrate for fluorescence quenching and has been widely explored. However, the fluorescence quenching effect for two-dimensional(2D) materials of topological insulators has not been reported, yet. For the first time, we studied the fluorescence quenching effect of Rhodanmine 6G molecules on 2D Bi_2Se_3 crystals with the thickness ranged from 1 layer to 8 layers. It was found that the atomically-thin Bi_2Se_3 crystals can quench the fluorescence of the adsorbed Rhodamine 6G molecules, and the thicker Bi_2Se_3 crystals show more obvious quenching ability to Rhodanmine 6G molecules. A possible quenching mechanism of fluorescence resonance energy transfer was suggested.
引文
[1]Castro Neto,A.H.;Guinea,F.;Peres,N.M.R.;Novoselov,K.S.;Geim,A.K.Rev.Mod.Phys.2009,81,109.
[2]Qi,X.L.;Zhang,S.C.Rev.Mod.Phys.2011,83.
[3]Xie,L.M.;Ling,X.;Fang,Y.;Zhang,J.;Liu,Z.F.J.Am.Chem.Soc.2009,131,9890.
[2]Qi,X.L.;Zhang,S.C.Rev.Mod.Phys.2011,83.
[3]Xie,L.M.;Ling,X.;Fang,Y.;Zhang,J.;Liu,Z.F.J.Am.Chem.Soc.2009,131,9890.