Transforming achiral semiconductors into chiral domains with exceptional circular dichroism

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-01-30 DOI:10.1126/science.ado7201

Thomas J. Ugras, River B. Carson, Reilly P. Lynch, Haoyang Li, Yuan Yao, Lorenzo Cupellini, Kirt A. Page, Da Wang, Arantxa Arbe, Sara Bals, Louisa Smieska, Arthur R. Woll, Oriol Arteaga, Tamás Jávorfi, Giuliano Siligardi, Gennaro Pescitelli, Steven J. Weinstein, Richard D. Robinson

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引用次数: 0

Abstract

Highly concentrated solutions of asymmetric semiconductor magic-sized clusters (MSCs) of cadmium sulfide, cadmium selenide, and cadmium telluride were directed through a controlled drying meniscus front, resulting in the formation of chiral MSC assemblies. This process aligned their transition dipole moments and produced chiroptic films with exceptionally strong circular dichroism. G -factors reached magnitudes as high as 1.30 for drop-cast films and 1.06 for patterned films, approaching theoretical limits. By controlling the evaporation geometry, various domain shapes and sizes were achieved, with homochiral domains exceeding 6 square millimeters that transition smoothly between left- and right-handed chirality. Our results uncovered fundamental relationships between meniscus deposition processes, the alignment of supramolecular filaments and their MSC constituents, and their connection to emergent chiral properties.

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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