Selectively Regulating the Chiral Morphology of Amino Acid-Assisted Chiral Gold Nanoparticles with Circularly Polarized Light,ACS Applied Materials & Interfaces

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Selectively Regulating the Chiral Morphology of Amino Acid-Assisted Chiral Gold Nanoparticles with Circularly Polarized Light
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-01-04 , DOI: 10.1021/acsami.1c22191
Hongdan Wang _{1,

2} , Yang Liu _{1,

2} , Jianmin Yu _{1,

2} , Yongguang Luo _{1,

2} , Lingling Wang _{1,

2} , Taehun Yang _{1,

2} , Bikshapathi Raktani ₁ , Hyoyoung Lee _{1,

2,

3,

4}

Affiliation

Chiral nanomaterials have attracted increasing attention due to their versatile optical properties. Although circularly polarized (CP) light can serve as an inducer, it has negligible effects because of the short lifetime of the plasmonic states. Here, we propose that the site-selective chirality regulation on the morphology of cysteine (cys) amino acid-assisted chiral gold nanoparticles (cys-chiral AuNPs) can be realized through CP light irradiation. This can result in the increased or decreased circular dichroism (CD) signal intensity. The site-selective growth mechanism of the cys-chiral AuNPs is elucidated with light–matter interactions through the opposite rotation of right(R)/left(L) CP light. The site-selective chirality growth of the cys-chiral AuNPs is ascribed to the morphology evolution induced by the synergy of cys and R/L-CP light, which is clearly analyzed and elucidated with high CD intensities. This work provides a promising alternative strategy to produce high-chirality nanomaterials that can be applied in biomedicine and enantiomer photocatalytic reaction.

中文翻译：

圆偏振光选择性调控氨基酸辅助手性金纳米粒子的手性形态

手性纳米材料由于其多功能的光学特性而引起了越来越多的关注。尽管圆偏振 (CP) 光可以作为诱导剂，但由于等离子体状态的寿命短，它的影响可以忽略不计。在这里，我们提出通过CP光照射可以实现对半胱氨酸（cys）氨基酸辅助手性金纳米颗粒（cys-chiral AuNPs）形态的位点选择性手性调控。这可能导致圆二色性 (CD) 信号强度增加或减少。通过右（R）/左（L）CP光的相反旋转，通过光 - 物质相互作用阐明了半手性AuNP的位点选择性生长机制。cys-手性 AuNPs 的位点选择性手性增长归因于由 cys 和 R/L-CP 光的协同作用引起的形态演变，用高 CD 强度清楚地分析和阐明了这一点。这项工作为生产可应用于生物医学和对映异构体光催化反应的高手性纳米材料提供了一种有前景的替代策略。

更新日期：2022-01-19

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