Octo-diamond crystal of nanoscale tetrahedra with interchanging chiral motifs

IF 37.2 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Fang Lu, Yugang Zhang, Tobias Dwyer, Aaron Michelson, Timothy C. Moore, Hanfei Yan, Kim Kisslinger, Honghu Zhang, Xiaobo Chen, Sharon C. Glotzer, Oleg Gang
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引用次数: 0

Abstract

Despite their simplicity, tetrahedra can assemble into diverse high- and low-density structures. Here we report a low-density ‘octo-diamond’ structure formed by nanoscale solid tetrahedra with a 64-tetrahedron unit cell containing 8 cubic-diamond subcells. The formed crystal is achiral, but is composed of chiral bilayers with alternating handedness. The left- and right-handed chirality of the bilayers, combined with the plasmonic nature of the gold tetrahedra, produces chiroptical responses at the crystal surface. We uncover that the hydrophobic substrate facilitates the arrangement of tetrahedra into irregular ring-like patterns, creating a critical, uneven topography to stabilize the observed octo-diamond structure. This study reveals a potent way to affect colloidal crystallization through particle–substrate interactions, expanding the nanoparticle self-assembly toolbox.

Abstract Image

具有互换手性基序的纳米四面体八金刚石晶体
尽管它们很简单,四面体可以组装成各种高密度和低密度的结构。在这里,我们报告了一种低密度的“八金刚石”结构,由纳米级固体四面体与含有8个立方金刚石亚细胞的64-四面体单元胞组成。所形成的晶体是非手性的,但由手性双分子层组成。双分子层的左手手性和右手手性,再加上金四面体的等离子体性质,在晶体表面产生了chironal响应。我们发现疏水衬底促进了四面体排列成不规则的环状图案,创造了一个关键的,不均匀的地形,以稳定观察到的八金刚石结构。这项研究揭示了一种通过颗粒-衬底相互作用影响胶体结晶的有效方法,扩大了纳米颗粒自组装工具箱。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Nature Materials
Nature Materials 工程技术-材料科学:综合
CiteScore
62.20
自引率
0.70%
发文量
221
审稿时长
3.2 months
期刊介绍: Nature Materials is a monthly multi-disciplinary journal aimed at bringing together cutting-edge research across the entire spectrum of materials science and engineering. It covers all applied and fundamental aspects of the synthesis/processing, structure/composition, properties, and performance of materials. The journal recognizes that materials research has an increasing impact on classical disciplines such as physics, chemistry, and biology. Additionally, Nature Materials provides a forum for the development of a common identity among materials scientists and encourages interdisciplinary collaboration. It takes an integrated and balanced approach to all areas of materials research, fostering the exchange of ideas between scientists involved in different disciplines. Nature Materials is an invaluable resource for scientists in academia and industry who are active in discovering and developing materials and materials-related concepts. It offers engaging and informative papers of exceptional significance and quality, with the aim of influencing the development of society in the future.
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