化学驱动的雅努斯合体在溶性染色液晶液晶中的行为
Devika Gireesan Sudha1, Hend Baza2, David P Rivas3
1Department of Physics, <a href="https://ror.org/00d9ah105">University of California Merced</a>, Merced, California 95343, USA.
Physical review. E
|December 18, 2024
概括
活性金涂层的Janus合体在液晶流体中以方向移动. 粒子大小影响运动,较小的体滚动而较大的体不滚动,揭示了复杂的理论运动动力学.
科学领域:
- 体科学是关于体的科学.
- 软物质物理学 软物质物理学
- 材料科学是一种材料科学.
背景情况:
- 涂层的Janus合体通过过氧化分解在水溶液中自行运动.
- 色液晶 (LCLCs),如二色糖酸盐 (DSCG),具有异性质的特性.
研究的目的:
- 为了研究在均对齐的阴性LCLC阶段内活跃的Janus合体的运动.
- 为了了解液晶的异构性如何影响合体的自我推进.
- 分析这些合体的扩散行为和运动特征.
主要方法:
- 使用金涂层的Janus合物作为活性颗粒.
- 使用二色糖酸盐 (DSCG) 作为一种液态晶体介质.
- 使用显微镜和时间尺度分析观察和分析合体运动.
主要成果:
- 詹纳斯合体表现出与DSCG液晶的阴性导体平行的定向运动.
- 在短时间范围内观察到从弹道到异常扩散运动的交叉.
- 较小的Janus合体在弹道运动中滚动,而较大的合体则不会.
结论:
- 阴性液晶的异质性强烈地决定了Janus合体自我推进的方向.
- 粒子大小在弹道运动期间的运动模式 (滚动与非滚动) 中起着关键作用.
- 异性流体中的以浮力驱动的运动是复杂的,并受到粒子-流体相互作用的影响.
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