纳米棒
手性(物理)
圆二色性
对映体
纳米晶
材料科学
胶束
结晶学
化学
纳米技术
立体化学
有机化学
手征对称破缺
物理
量子力学
水溶液
Nambu–Jona Lasinio模型
夸克
作者
Kyle Van Gordon,Bing Ni,Robin Girod,Mikhail Mychinko,Francisco Bevilacqua,Sara Bals,Luis M. Liz‐Marzán
标识
DOI:10.1002/anie.202403116
摘要
Handedness is an essential attribute of chiral nanocrystals, having a major influence on their properties. During chemical growth, the handedness of nanocrystals is usually tuned by selecting the corresponding enantiomer of chiral molecules involved in asymmetric growth, often known as chiral inducers. We report that, even using the same chiral inducer enantiomer, the handedness of chiral gold nanocrystals can be reversed by using Au nanorod seeds with either single crystalline or pentatwinned structure. This effect holds for chiral growth induced both by amino acids (e.g. cystine) and by chiral micelles (comprising cetyltrimethylammonium chloride and 1,1’‐binaphthyl‐2,2‐diamine). Although it was challenging to discern the morphological handedness for L‐cystine‐directed particles, even using electron tomography, both cases showed circular dichroism bands of opposite sign, with nearly mirrored chiroptical signatures for chiral micelle‐directed growth, along with quasi‐helical wrinkles of inverted handedness. These results expand the chiral growth toolbox with an effect that might be exploited to yield a host of interesting morphologies with tunable optical properties.
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