Chiral Optical Force Generated by a Superchiral Near-Field of a Plasmonic Triangle Trimer as Origin of Giant Bias in Chiral Nucleation: A Simulation Study

Hiromasa Niinomi, Teruki Sugiyama, An Chieh Cheng, Miho Tagawa, Toru Ujihara, Hiroshi Y. Yoshikawa, Ryuzo Kawamura, Jun Nozawa, Junpei T. Okada, Satoshi Uda

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We previously reported that giant crystal enantiomeric excess (CEE) can be obtained when sodium chlorate (NaClO3) chiral crystallization from a solution is induced by the excitation of localized surface plasmon resonance (LSPR) of a Au triangle trimer nanostructure by a circularly polarized laser. However, the role of the LSPR excitation in the giant CEE remains unclear. In this work, we showed, by finite-difference time-domain analysis of plasmonic near-field, that the magnitude of a chiral optical gradient force originating from the strong superchiral near-field at the Au trimer nanogap on a virtual NaClO3 chiral crystalline cluster is comparable to that of the electric-field gradient force in previous laser-trapping-induced crystallization from unsaturated solution. We revealed that the giant CEE resulted from a difference in the frequency of attachment of chiral crystalline clusters to crystal nuclei or in the local concentration due to chirally biased diffusion rather than enantioselective optical trapping.

本文言語English
ページ(範囲)6209-6221
ページ数13
ジャーナルJournal of Physical Chemistry C
125
11
DOI
出版ステータスPublished - 2021 3 25

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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