TY - JOUR
T1 - In Situ Observation of Chiral Symmetry Breaking in NaClO3 Chiral Crystallization Realized by Thermoplasmonic Micro-Stirring
AU - Niinomi, Hiromasa
AU - Sugiyama, Teruki
AU - Tagawa, Miho
AU - Harada, Shunta
AU - Ujihara, Toru
AU - Uda, Satoshi
AU - Miyamoto, Katsuhiko
AU - Omatsu, Takashige
N1 - Funding Information:
This work was supported by Grant-in-Aid for JSPS Fellows Grant Number 15J11361, JSPS KAKENHI Grant-in-Aid for Young Scientists (B) Grant Number 16K17512, JSPS KAKENHI Grant-in-Aid for Early-Career Scientists Grant Number 18K14177, JSPS KAKENHI Grant-in-Aid for Scientific Research on Innovative Areas “Nano-Material Manipulation and Structural Order Control with Optical Forces” Grant Number JP 16H06507, JSPS KAKENHI Challenging Research (Exploratory) Grant Number JP 17K19070, JSPS KAKENHI Grant-in-Aid for Scientific Research (A) Grant Number JP18H03884, the joint usage/ research program of the Institute of Materials and Systems for Sustainability (IMaSS), Nagoya University and the Ministry of Science and Technology in Taiwan under Contracts MOST106-2113-M-009-017-.
Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - We have found that large chiral symmetry breaking in chiral crystallization can be achieved by irradiating a several milliwatts focused laser to a plasmonic nanolattice immersed in a stagnant NaClO3 saturated aqueous solution. Several hundreds of chiral crystals with the same handedness showed up in the solution after the laser irradiation in contrast to spontaneous crystallization. In situ microscopic observation for the early stage of the crystallization in the vicinity of the focal spot revealed that microbubble generation followed by large supersaturation increase, in which supersaturation reaches 360%, promotes several numbers of crystal nucleation in the vicinity of the bubble as "mother" crystal. The generation of the microbubble induced Marangoni convection, the velocity of which reaches several hundreds of micrometers per second, crushing the first appearing chiral crystal into pieces by microfluidic shear. Namely, secondary nucleation caused by microfluidic shear amplified the number of "daughter" crystals with the same handedness. This spatiotemporally controllable micromixing experiment realized by laser irradiation gives us not only a novel route bridging a light and chiral symmetry breaking but also the novel method to observe the early stage dynamics of the secondary nucleation, which was hard to observe by conventional observation technique, in real time.
AB - We have found that large chiral symmetry breaking in chiral crystallization can be achieved by irradiating a several milliwatts focused laser to a plasmonic nanolattice immersed in a stagnant NaClO3 saturated aqueous solution. Several hundreds of chiral crystals with the same handedness showed up in the solution after the laser irradiation in contrast to spontaneous crystallization. In situ microscopic observation for the early stage of the crystallization in the vicinity of the focal spot revealed that microbubble generation followed by large supersaturation increase, in which supersaturation reaches 360%, promotes several numbers of crystal nucleation in the vicinity of the bubble as "mother" crystal. The generation of the microbubble induced Marangoni convection, the velocity of which reaches several hundreds of micrometers per second, crushing the first appearing chiral crystal into pieces by microfluidic shear. Namely, secondary nucleation caused by microfluidic shear amplified the number of "daughter" crystals with the same handedness. This spatiotemporally controllable micromixing experiment realized by laser irradiation gives us not only a novel route bridging a light and chiral symmetry breaking but also the novel method to observe the early stage dynamics of the secondary nucleation, which was hard to observe by conventional observation technique, in real time.
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U2 - 10.1021/acs.cgd.8b00420
DO - 10.1021/acs.cgd.8b00420
M3 - Article
AN - SCOPUS:85049229239
VL - 18
SP - 4230
EP - 4239
JO - Crystal Growth and Design
JF - Crystal Growth and Design
SN - 1528-7483
IS - 8
ER -