A chiral smectic phase induced by an alternating external field

Chen, Zi-Qin; Sun, Yu-Wei; Zhu, Yunlong; Li, Zhanwei; Sun, Zhaoyan

doi:10.1039/d2sm00093h

Cited by 2 publications

(1 citation statement)

References 67 publications

(85 reference statements)

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“…Essential in many chemical and physical phenomena and processes, the impact of external fields has attracted noticeable attention lately in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] because it can influence the molecular structure, [17][18][19][20][21][22] chemical reactivity, [23][24][25][26][27][28] and other electronic properties. [29][30][31][32][33][34] In a previous study, we investigated the impact of uniform external electric fields on molecular acidity and aromaticity propensities for the benzoic acid molecule.…”

Section: Introductionmentioning

confidence: 99%

Directionality and additivity effects of molecular acidity and aromaticity for substituted benzoic acids under external electric fields

Li,

Wan,

Rong

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Directionality and additivity effects of molecular acidity and aromaticity for substituted benzoic acids under external electric fields

Li,

Wan,

Rong

et al. 2023

Phys. Chem. Chem. Phys.

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External field induced defect transformation in circular confined Gay–Berne liquid crystals

Chen

Sun

Zhang

et al. 2023

The Journal of Chemical Physics

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Normally defects can be classified into four types based on the positions of singularities formed by rod molecules in two-dimensional circular confinement. However, small aspect ratio liquid crystals are considered to be difficult to generate all these four types of defects. In this study, we use molecular dynamics simulation to investigate the defect formed in Gay-Berne ellipsoidal liquid crystals with small aspect ratios confined in a circular cavity. As expected, we only find two types of defects (inside the circle and at the boundary) in circular confined Gay-Berne ellipsoids under static conditions at various density, aspect ratio, and the interaction between wall and liquid crystals. However, when introducing an external field to the system, four types of defects can be observed. With increasing the strength of external field, the singularities in the circular confined system change from the inside to the boundary and the outside, and the farthest position that the singularities can reach depends on the strength of the external field. We further introduce an alternating triangular wave external field to the system to check if we can observe the transformation of different defects within an oscillating period. We find that the position of the singularities greatly depends on the oscillating intensity and oscillating period. By changing oscillating intensity and oscillating period of external field, the defect types can be adjusted and transformation between different defects can be easily observed. This provides a feasible way to modulate liquid crystal defects and investigate the transformation between different defects.

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A chiral smectic phase induced by an alternating external field

Abstract: Using simple achiral building blocks modulated by an external field to achieve chiral liquid crystal phases remains a challenge. In this study, chiral helix liquid crystal phase is obtained for...

Cited by 2 publications

References 67 publications

Directionality and additivity effects of molecular acidity and aromaticity for substituted benzoic acids under external electric fields

Directionality and additivity effects of molecular acidity and aromaticity for substituted benzoic acids under external electric fields

External field induced defect transformation in circular confined Gay–Berne liquid crystals

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