DNA-Templating Mass Production of Gold Trimer Rings for Optical Metamaterials
DNA-Templating Mass Production of Gold Trimer Rings for Optical Metamaterials
复制标题
用于光学超材料的金三聚体环的 DNA 模板批量生产
作者：
Watanabe-Tamaki;R.;Ishikawa;A.;Tanaka;T.;Zako;T.;Maeda;M.
研究了用DNA模板大规模制备20纳米金纳米颗粒三聚体环的方法。三种dna单共轭金纳米粒子通过简单的杂交过程自组装成具有纳米级间隙的三聚体环结构。将自组装金三聚体环固定在厘米尺度的石英衬底上，用远场透射光谱法研究了其光学性质。原子力显微镜对金三聚体环进行了定量表征，结果表明，在固定过程中，有43%的金纳米颗粒在衬底上保持环状结构。在远场透射光谱中，三聚体环样品在可见光谱中明显表现出两个吸收倾角，而单体样品只有一个吸收倾角。实验结果与相应的数值模拟结果吻合较好，证明了三聚体环的独特光谱特征是由金纳米粒子等离子体共振的杂化引起的。通过设计DNA模板可以完全控制金纳米粒子的等离子体响应，从而为大规模光学超材料的实现开辟了一条新的途径。
Mass production of trimer rings consisting of 20 nm gold nanoparticles by using DNA template is demonstrated. Three kinds of DNA-monoconjugated gold nanoparticles are programmed to self-assemble into a trimer ring structure with nanoscale gaps through simple hybridization process. Self-assembled gold trimer rings are immobilized on a centimeter-scale quartz substrate to investigate their optical properties by the far-field transmission spectroscopy. Quantitative characterization of the gold trimer rings by atomic force microscope measurements reveals that 43% of gold nanoparticles keep forming the ring configuration on the substrate after the immobilizing process. In the far-field transmission spectroscopy, the trimer ring sample clearly exhibits two absorption dips in the visible spectrum, while monomer one has a single dip. The experimental results are in good agreement with the corresponding numerical simulations, proving that the unique spectral feature for the trimer ring arises from the hybridization of plasmon resonances of gold nanoparticles. The plasmonic responses of gold nanoparticle assemblies can be entirely controlled by designing DNA templates and thus may open up a novel approach for the realization of large-scale optical metamaterials.
登录
查看更多内容
影响因子：
8.6
作者：
Ishikawa, A;Tanaka, T;Kawata, S
通讯作者：
Kawata, S
影响因子：
56.9
作者：
Linden, S;Enkrich, C;Soukoulis, CM
通讯作者：
Soukoulis, CM
影响因子：
7.4
作者：
Lai, Congfang;Cao, Huachuan;Hearst, John E.;Corash, Laurence;Luo, Hai;Wang, Yinsheng
通讯作者：
Wang, Yinsheng
DOI：
10.1117/12.681495
发表时间：
2006-08
期刊：
--
影响因子：
--
作者：
A. Ishikawa;Takuo Tanaka;S. Kawata
通讯作者：
A. Ishikawa;Takuo Tanaka;S. Kawata
影响因子：
56.9
作者：
Gansel, Justyna K.;Thiel, Michael;Wegener, Martin
通讯作者：
Wegener, Martin