{"title":"Surface functionalization of Ag-doped zirconium oxide layers for molecular alignment","authors":"Dong Wook Lee , Dae-Shik Seo","doi":"10.1016/j.flatc.2025.100831","DOIUrl":null,"url":null,"abstract":"<div><div>Ag-doped ZrO films were fabricated using a brush-based solution-coating process that integrated conventional film formation with alignment layer treatment in a single step. The films were doped with Ag at concentrations of 0, 10, and 20 wt%. Shear stress generated by brush-hair movements induced anisotropic micro- and nanogroove structures on the film surface, facilitating uniform liquid crystal (LC) alignment through geometric constraints. The LC alignment state was confirmed by polarized optical microscopy. The Ag-doped ZrO films exhibited a high polar anchoring energy of 1.82 × 10<sup>−3</sup> J m<sup>−2</sup> and minimal hysteresis, indicating a weak image-sticking effect. Additionally, these films demonstrated an optical transmittance of 83.5 %, making them suitable for optoelectronic applications. Overall, Ag doping enhances the functionality of ZrO films as uniform LC alignment layers and broadens their potential for LC device applications.</div></div>","PeriodicalId":316,"journal":{"name":"FlatChem","volume":"50 ","pages":"Article 100831"},"PeriodicalIF":5.9000,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"FlatChem","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S245226272500025X","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Ag-doped ZrO films were fabricated using a brush-based solution-coating process that integrated conventional film formation with alignment layer treatment in a single step. The films were doped with Ag at concentrations of 0, 10, and 20 wt%. Shear stress generated by brush-hair movements induced anisotropic micro- and nanogroove structures on the film surface, facilitating uniform liquid crystal (LC) alignment through geometric constraints. The LC alignment state was confirmed by polarized optical microscopy. The Ag-doped ZrO films exhibited a high polar anchoring energy of 1.82 × 10−3 J m−2 and minimal hysteresis, indicating a weak image-sticking effect. Additionally, these films demonstrated an optical transmittance of 83.5 %, making them suitable for optoelectronic applications. Overall, Ag doping enhances the functionality of ZrO films as uniform LC alignment layers and broadens their potential for LC device applications.
期刊介绍：
FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)
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