题名 | The fate of liquid crystal topological defects on chemically patterned surfaces during phase transitions |
作者 | |
通讯作者 | Zhang, Rui; Li, Xiao |
发表日期 | 2022-07-01
|
DOI | |
发表期刊 | |
ISSN | 1744-683X
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EISSN | 1744-6848
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卷号 | 18期号:32页码:5939-5948 |
摘要 | Controlling topological defects in liquid crystals (LCs) is an essential element in the development of areas such as directed self-assembly and micropatterning materials. However, during the phase transition on confined patterned surfaces, how the morphologies in one liquid crystalline phase change from deformations or defects into another phase is much less known. Here, we examine the fate of defects in a LC confined on a patterned surface during smectic-A-nematic and nematic-isotropic phase transitions, using experiments and simulation analyses. Upon heating from smectic-A to nematic, a Toric focal conical domain (TFCD) melts into a +1 converging boojum defect, which then transitioned into a concentric configuration as temperature increases, attributed to a steeper decrease of the bend and twist modulus compared to splay modulus. During cooling, TFCDs are developed from two distinct pathways depending on the cooling rates. Our continuum simulation recapitulates these transformations and provides elastic constant-based explanations for the two pathways. Although the phase transition pathways of defects are independent of the geometry of the confined patterns, the arrangement of FCDs is highly dependent on the size and shape of the patterns. Taken together, this simple approach offers promising opportunities for tuning the micro- or nano-patterning of topological defects in liquid crystals. |
相关链接 | [来源记录] |
收录类别 | |
语种 | 英语
|
学校署名 | 其他
|
资助项目 | DOE Office of Science[DE-AC02-06CH11357]
; Hong Kong Research Grants Council[16300221]
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WOS研究方向 | Chemistry
; Materials Science
; Physics
; Polymer Science
|
WOS类目 | Chemistry, Physical
; Materials Science, Multidisciplinary
; Physics, Multidisciplinary
; Polymer Science
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WOS记录号 | WOS:000828209700001
|
出版者 | |
EI入藏号 | 20223112459557
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EI主题词 | Phase change materials
; Topology
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EI分类号 | Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4
|
来源库 | Web of Science
|
引用统计 |
被引频次[WOS]:4
|
成果类型 | 期刊论文 |
条目标识符 | http://sustech.caswiz.com/handle/2SGJ60CL/359474 |
专题 | 工学院_机械与能源工程系 |
作者单位 | 1.Univ North Texas, Mat Sci & Engn Dept, Denton, TX 76203 USA 2.Hongkong Univ Sci & Technol, Dept Phys, Hong Kong, Peoples R China 3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 |
Pawale, Tejal,Yi, Shengzhu,Wang, Xiaowei,et al. The fate of liquid crystal topological defects on chemically patterned surfaces during phase transitions[J]. Soft Matter,2022,18(32):5939-5948.
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APA |
Pawale, Tejal,Yi, Shengzhu,Wang, Xiaowei,Zhang, Rui,&Li, Xiao.(2022).The fate of liquid crystal topological defects on chemically patterned surfaces during phase transitions.Soft Matter,18(32),5939-5948.
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MLA |
Pawale, Tejal,et al."The fate of liquid crystal topological defects on chemically patterned surfaces during phase transitions".Soft Matter 18.32(2022):5939-5948.
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条目包含的文件 | 条目无相关文件。 |
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