DNA模板定位组装大粒径纳米金阵列及其表面等离子体共振性质研究
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- 英文论文题名：A General Method for Building Large Plasmonic Gold Nanoparticles Clusters Using DNA Templates
- 论文作者：方维娜 ; 张祎男 ; 贾思思 ; 柳华杰
- 英文论文作者：Weina Fang ; Yinan Zhang ; Sisi Jia ; Huajie Liu ; Shanghai Institute of Applied Physics ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院上海应用物理研究所;
- 论文关键词：纳米金 ; 纳米组装结构 ; 表面等离子体共振
- 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-第三十六分会：纳米材料合成与组装
- 语种：中文
- 分类号：O614.123;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十六分会 ; 纳米材料合成与组装
- 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：185k
- 原文格式：D
- 会议级别：全国
摘要
DNA作为具有精确分子识别能力的生物大分子,在构建纳米自组装结构方面已受到了越来越多的关注。在本工作中,我们提出了一种用高级DNA折纸模板定位组装大粒径纳米金颗粒,构建具有表面等离子体光子学特性结构的通用方法。简单的三角形DNA折纸作为单体构建出高级DNA折纸模板(菱形、梯形及六边形DNA折纸)并在上面定位组装大粒径纳米金颗粒(直径为30nm、50nm与80nm)。我们成功构建了一系列大粒径纳米金团簇结构,并原位检测到金四聚体具有类Fano共振特性。在此基础上,我们进一步研究了这种具有类Fano共振特性结构的表面增强拉曼散射效应,通过调节拉曼分子在折纸上的修饰数目和位置,我们分别检测了6个、3个以及1个拉曼分子的信号,初步实现了单颗粒单分子检测。这项工作充分反映了DNA在构建精确自组装功能器件方面的优势。
Here we present self-assembly of large gold nanoparticles(AuN Ps) clusters based on DNA origami technique. For example, four large Au NPs were successfully placed on the corners of a rhomb origami. Scattering spectra of single tetramer cluster were exploited to examine the unique plasmonic features and a Fano-like resonance emerged, which is consistent with computational simulations. We examined the SERS effect of individual Fano-like resonant plasmonic clusters from Raman molecules fixed at specific hot spot. By precisely positioning a specific number of Raman molecules on the origami, SERS with high sensitivity down to the few-molecular level is obtained.
Here we present self-assembly of large gold nanoparticles(AuN Ps) clusters based on DNA origami technique. For example, four large Au NPs were successfully placed on the corners of a rhomb origami. Scattering spectra of single tetramer cluster were exploited to examine the unique plasmonic features and a Fano-like resonance emerged, which is consistent with computational simulations. We examined the SERS effect of individual Fano-like resonant plasmonic clusters from Raman molecules fixed at specific hot spot. By precisely positioning a specific number of Raman molecules on the origami, SERS with high sensitivity down to the few-molecular level is obtained.
引文
[1]Fan,J.A.;Wu,C.;Bao,K.;Bao,J.;etc.Science 2010,328:1135
[2]Zhang,Y.;Chao,J.;Liu,H.;Fan,C.;etc.Angew.Chem.Int.Ed.2016,DOI:10.1002/anie.201512022
[2]Zhang,Y.;Chao,J.;Liu,H.;Fan,C.;etc.Angew.Chem.Int.Ed.2016,DOI:10.1002/anie.201512022