DataVXAdvanced Optical MaterialsPaper
journal article·2023-09Open access

Multielementary Alloy Chiral Nanoparticles with Strong Optical Activities

Yicong Ma, Lin Yang, Xiangchen Hu, Miao Zhang, Geping Qu, Xiaopeng Bai, Haifeng Sun, Feng Zhu, Xiaoyan Zhong, Xiao Chen, Zongxiang Xu, Yi Yu, Zhifeng Huang

Advanced Optical Materials· Volume 11· Issue 18
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Abstract

Abstract Structural chirality has been imposed onto nano‐alloys to introduce diverse new properties. Chiral nanoparticles (CNPs) with the atomic scale chirality are composed of metastable chiral lattices having low thermal stability, so multielementary (>2 elements) CNPs are very challenging to produce using traditional high‐energy fabrication methods. Herein, layer‐by‐layer glancing angle deposition (LbL‐GLAD) at a low substrate temperature of ≈−40 °C, consisting of GLAD of the host CNPs and the subsequent GLAD of guests, is devised to extend the alloy compositional space to the ternary (e.g., Ag:Al:Cu and Ag:Al:Au) and quaternary (e.g., Ag:Al:Cu:Au and Al:In:Sn:Ti). The low‐temperature GLAD‐induced alloying facilitates the formation of the metastable multi‐layer chiral twisting of achiral facets, chiral defects due to the diffusion of the guests, and chiral electronic bands, leading to a significant amplification of chiroplasmonic optical activities in 20–30 folds. The LbL‐GLAD can be generally adapted to fabricate multielementary alloy CNPs composed of a wide range of elements, with a prospective application of asymmetric catalysts to synthesize an enantiomer with designable chirality, one of the most important topics in modern chemistry and biochemistry to solve the problems of health and environmental pollution.
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Research context

Metals & alloysNanomaterialsCatalysis & surfacesMaterials processing

OpenAlex topics: Copper-based nanomaterials and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Hong Kong Baptist University (HKBU) Kowloon Tong Kowloon Hong Kong SAR China

HKBU Institute of Research and Continuing Education Shenzhen Guangdong 518057 China

School of Physical Science and Technology ShanghaiTech University Shanghai 201210 China

TRACE EM Unit and Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong SAR China

City University of Hong Kong Matter Science Research Institute (Futian, Shenzhen) Shenzhen 518048 China

Nanomanufacturing Laboratory (NML) City University of Hong Kong Shenzhen Research Institute Shenzhen 518057 China

Department of Chemistry Southern University of Science and Technology Shenzhen Guangdong 518055 China

Department of Physics The Chinese University of Hong Kong Shatin, NT Hong Kong SAR China

Department of Chemistry The Chinese University of Hong Kong Shatin, NT Hong Kong SAR China

Funding

National Natural Science Foundation of China · Glaucoma Research Foundation · Science, Technology and Innovation Commission of Shenzhen Municipality · Innovation and Technology Fund · European Research Council · City University of Hong Kong

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