Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order

doi:10.1126/science.abd8576

GSTDTAP > 气候变化

DOI	10.1126/science.abd8576
	Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order
	Jun Lu; Yao Xue; Kalil Bernardino; Ning-Ning Zhang; Weverson R. Gomes; Naomi S. Ramesar; Shuhan Liu; Zheng Hu; Tianmeng Sun; Andre Farias de Moura; Nicholas A. Kotov; Kun Liu
	2021-03-26
发表期刊	Science
出版年	2021
英文摘要	The high polarizability of chiral nanoassemblies of plasmonic nanoparticles can lead to strong chiral dichroism, but strong light scattering causes the fraction of polarized photons generated, as measured by g-factors, to be much lower than that for chiral liquid crystals. Lu et al. used supramolecular interactions of gold nanorods with human islet amyloid peptides to assemble metallic superstructures with unusually high cholesteric order (see the Perspective by Nam and Kim). The long, straight helices increased the g-factor by 4600-fold, and this effect was used to screen small-molecule binding to amyloids. Science , this issue p. [1368][1]; see also p. [1311][2] Chiral assemblies of plasmonic nanoparticles are known for strong circular dichroism but not for high optical asymmetry, which is limited by the unfavorable combination of electrical and magnetic field components compounded by strong scattering. Here, we show that these limitations can be overcome by the long-range organization of nanoparticles in a manner similar to the liquid crystals and found in helical assemblies of gold nanorods with human islet amyloid polypeptides. A strong, polarization-dependent spectral shift and the reduced scattering of energy states with antiparallel orientation of dipoles activated in assembled helices increased optical asymmetry g -factors by a factor of more than 4600. The liquid crystal–like color variations and the nanorod-accelerated fibrillation enable drug screening in complex biological media. Improvement of long-range order can also provide structural guidance for the design of materials with high optical asymmetry. [1]: /lookup/doi/10.1126/science.abd8576 [2]: /lookup/doi/10.1126/science.abg9901
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/321101
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Jun Lu,Yao Xue,Kalil Bernardino,et al. Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order[J]. Science,2021.
APA	Jun Lu.,Yao Xue.,Kalil Bernardino.,Ning-Ning Zhang.,Weverson R. Gomes.,...&Kun Liu.(2021).Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order.Science.
MLA	Jun Lu,et al."Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order".Science (2021).