向列液晶中的功能化多壁碳纳米管：提高热力学和光电性能

IF 5.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-09-19 DOI:10.1016/j.materresbull.2025.113797

Praveen Kumar Singh , Himanshu Verma , Roman Dabrowski , Ravindra Dhar , Soumik Das

{"title":"向列液晶中的功能化多壁碳纳米管：提高热力学和光电性能","authors":"Praveen Kumar Singh , Himanshu Verma , Roman Dabrowski , Ravindra Dhar , Soumik Das","doi":"10.1016/j.materresbull.2025.113797","DOIUrl":null,"url":null,"abstract":"<div><div>The integration of carbon nanotubes (CNTs) into liquid crystals (LCs) offers dual benefits: promoting CNT alignment and enhancing LC phase order a key for advanced technologies. We present results that examine the effects of pristine and functionalized multi-walled CNTs (MWCNTs) on the thermodynamic, optical, dielectric, and electro-optical properties of a nematic LC mixture. Functionalization significantly improves CNT dispersion, leading to superior performance across various parameters. The isotropic–nematic transition temperature increases consistently with functionalized MWCNTs, while pristine MWCNTs show a non-monotonic trend. A notable reduction in the optical band gap in functionalized composites indicates stronger CNT–LC interactions. Dielectric anisotropy and conductivity are also enhanced in functionalized systems, contrasting with a decline in pristine composites at higher concentrations. Electro-optical studies—threshold voltage, splay elastic constant, and rotational viscosity—further highlight the improved behavior of functionalized nanocomposites. Overall, this work demonstrates the promise of functionalized CNT–LC composites for high-performance electro-optical applications and overcomes dispersion challenges seen with pristine CNTs.</div></div>","PeriodicalId":18265,"journal":{"name":"Materials Research Bulletin","volume":"195 ","pages":"Article 113797"},"PeriodicalIF":5.7000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Functionalized multiwalled carbon nanotubes in nematic liquid crystals: Enhancing thermodynamic and electro-optical performance\",\"authors\":\"Praveen Kumar Singh , Himanshu Verma , Roman Dabrowski , Ravindra Dhar , Soumik Das\",\"doi\":\"10.1016/j.materresbull.2025.113797\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>The integration of carbon nanotubes (CNTs) into liquid crystals (LCs) offers dual benefits: promoting CNT alignment and enhancing LC phase order a key for advanced technologies. We present results that examine the effects of pristine and functionalized multi-walled CNTs (MWCNTs) on the thermodynamic, optical, dielectric, and electro-optical properties of a nematic LC mixture. Functionalization significantly improves CNT dispersion, leading to superior performance across various parameters. The isotropic–nematic transition temperature increases consistently with functionalized MWCNTs, while pristine MWCNTs show a non-monotonic trend. A notable reduction in the optical band gap in functionalized composites indicates stronger CNT–LC interactions. Dielectric anisotropy and conductivity are also enhanced in functionalized systems, contrasting with a decline in pristine composites at higher concentrations. Electro-optical studies—threshold voltage, splay elastic constant, and rotational viscosity—further highlight the improved behavior of functionalized nanocomposites. Overall, this work demonstrates the promise of functionalized CNT–LC composites for high-performance electro-optical applications and overcomes dispersion challenges seen with pristine CNTs.</div></div>\",\"PeriodicalId\":18265,\"journal\":{\"name\":\"Materials Research Bulletin\",\"volume\":\"195 \",\"pages\":\"Article 113797\"},\"PeriodicalIF\":5.7000,\"publicationDate\":\"2025-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Research Bulletin\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0025540825005045\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Research Bulletin","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0025540825005045","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

将碳纳米管（CNTs）集成到液晶（LC）中具有双重好处：促进碳纳米管排列和提高LC相序是先进技术的关键。我们研究了原始的和功能化的多壁CNTs （MWCNTs）对向列相LC混合物的热力学、光学、介电和光电性质的影响。功能化显著改善碳纳米管分散，导致优越的性能跨越各种参数。各向同性向列转变温度随功能化MWCNTs的升高而升高，而原始MWCNTs呈现非单调趋势。功能化复合材料中光学带隙的显著减小表明CNT-LC相互作用更强。在功能化体系中，介质各向异性和电导率也得到了增强，而在较高浓度下，原始复合材料则有所下降。光电研究——阈值电压、拉伸弹性常数和旋转粘度——进一步强调了功能化纳米复合材料的改进行为。总的来说，这项工作证明了功能化碳纳米管- lc复合材料在高性能光电应用中的前景，并克服了原始碳纳米管的色散挑战。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Functionalized multiwalled carbon nanotubes in nematic liquid crystals: Enhancing thermodynamic and electro-optical performance

查看原文本刊更多论文

Functionalized multiwalled carbon nanotubes in nematic liquid crystals: Enhancing thermodynamic and electro-optical performance

The integration of carbon nanotubes (CNTs) into liquid crystals (LCs) offers dual benefits: promoting CNT alignment and enhancing LC phase order a key for advanced technologies. We present results that examine the effects of pristine and functionalized multi-walled CNTs (MWCNTs) on the thermodynamic, optical, dielectric, and electro-optical properties of a nematic LC mixture. Functionalization significantly improves CNT dispersion, leading to superior performance across various parameters. The isotropic–nematic transition temperature increases consistently with functionalized MWCNTs, while pristine MWCNTs show a non-monotonic trend. A notable reduction in the optical band gap in functionalized composites indicates stronger CNT–LC interactions. Dielectric anisotropy and conductivity are also enhanced in functionalized systems, contrasting with a decline in pristine composites at higher concentrations. Electro-optical studies—threshold voltage, splay elastic constant, and rotational viscosity—further highlight the improved behavior of functionalized nanocomposites. Overall, this work demonstrates the promise of functionalized CNT–LC composites for high-performance electro-optical applications and overcomes dispersion challenges seen with pristine CNTs.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.