DNA-Nanotechnology-Enabled Chiral Plasmonics: From Static to Dynamic,Accounts of Chemical Research

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DNA-Nanotechnology-Enabled Chiral Plasmonics: From Static to Dynamic
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2017-09-27 00:00:00 , DOI: 10.1021/acs.accounts.7b00389
Chao Zhou ₁ , Xiaoyang Duan _{1,

2} , Na Liu _{1,

2}

Affiliation

The development of DNA nanotechnology, especially the advent of DNA origami, has made DNA ideally suited to construct nanostructures with unprecedented complexity and arbitrariness. As a fully addressable platform, DNA origami can be used to organize discrete entities in space through DNA hybridization with nanometer accuracy. Among a variety of functionalized particles, metal nanoparticles such as gold nanoparticles (AuNPs) feature an important pathway to endow DNA-origami-assembled nanostructures with tailored optical functionalities. When metal particles are placed in close proximity, their particle plasmons, i.e., collective oscillations of conduction electrons, can be coupled together, giving rise to a wealth of interesting optical phenomena. Nevertheless, characterization methods that can read out the optical responses from plasmonic nanostructures composed of small metal particles, and especially can optically distinguish in situ their minute conformation changes, are very few. Circular dichroism (CD) spectroscopy has proven to be a successful means to overcome these challenges because of its high sensitivity in discrimination of three-dimensional conformation changes.

中文翻译：

启用DNA纳米技术的手性等离子体：从静态到动态

DNA纳米技术的发展，尤其是DNA折纸的出现，使DNA成为构建具有前所未有的复杂性和任意性的纳米结构的理想之选。作为一种完全可寻址的平台，DNA折纸可用于通过纳米精度的DNA杂交来组织空间中的离散实体。在各种功能化的颗粒中，金属纳米颗粒（例如金纳米颗粒（AuNPs））具有赋予DNA折纸组装的纳米结构以定制的光学功能的重要途径。当金属粒子紧密靠近放置时，它们的粒子等离激元，即传导电子的集体振荡，可以耦合在一起，从而产生大量有趣的光学现象。尽管如此，可以从由小金属颗粒组成的等离激元纳米结构中读出光学响应，特别是可以在光学上原位分辨其微小构象变化的表征方法很少。圆二色性（CD）光谱已被证明是克服这些挑战的成功方法，因为它对三维构象变化的识别具有很高的敏感性。

更新日期：2017-09-27

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