Spatial and Orientational Templating of Semiconducting Polymers in a Cholesteric Liquid Crystal

Kang, Shin‐Woong; Jin, Sung‐Ho; Chien, Liang–Chy; Sprunt, Sam

doi:10.1002/adfm.200305083

Cited by 42 publications

(25 citation statements)

References 32 publications

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“…10,[98][99][100][101] There are many kinds of chiral liquid crystals in terms of chiral LC phase, i.e., cholesteric or N*, blue phases, 102,103 and twist grain boundary phases. 104,105 Especially, the N*-LC can be easily induced by adding a small amount of chiral compounds as a chiral dopant into nematic liquid crystal (N-LC).…”

Section: Liquid-crystalline Binaphthyl Derivativesmentioning

confidence: 99%

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

2009

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with expertise in functional conjugated polymers. His research interests have involved electrically conducting polymers and liquidcrystalline, luminescent, and photoresponsive conjugated polymers, with works focused on the synthesis of helical polyacetylene in the chiral nematic liquid-crystal field. He has also been engaged in development of liquid-crystalline aromatic conjugated polymers with linearly and circularly polarized optoelectronic properties. He graduated from the

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Section: Liquid-crystalline Binaphthyl Derivativesmentioning

confidence: 99%

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

2009

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“…They have been used to template organic and inorganic materials, which increase the carrier mobility and electrical conductivity [11,12]. LC phases are known to possess orientational order as in the case of nematic liquid crystals, and in some cases, both positional and orientational order as in the case of smectic liquid crystals [13].…”

Section: Introductionmentioning

confidence: 99%

Polymer electrolyte liquid crystal system for improved optical and electrical properties

Said

Zulkifli

Kamarudin

et al. 2015

European Polymer Journal

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“…[25][26][27][28][29] The formation of both spatially and orientationally structured networks, without using external lithographic or holographic implements, has been demonstrated by using pattern-forming states of cholesteric liquid crystals as reaction templates. [30][31][32][33] It has been hypothesized that the spatial templating is driven by the spatially nonuniform elastic deformation of cholesteric pattern-forming states as a reaction medium. [30][31][32] However, this method is rather restrained by the limited number of pattern-forming states of cholesteric liquid crystals.…”

Section: Introductionmentioning

confidence: 99%

“…[30][31][32][33] It has been hypothesized that the spatial templating is driven by the spatially nonuniform elastic deformation of cholesteric pattern-forming states as a reaction medium. [30][31][32] However, this method is rather restrained by the limited number of pattern-forming states of cholesteric liquid crystals. The patterns can be templated only by the available patternforming states of cholesteric LCs.…”

Section: Introductionmentioning

confidence: 99%

Optically and spatially templated polymer architectures formed by photopolymerization of reactive mesogens in periodically deformed liquid crystals

2017

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A unique and versatile method for forming optically (that is, orientationally) and spatially patterned polymer architectures was developed based on the photopolymerization of reactive mesogens (RMs) in a periodically deformed liquid crystal (LC). Without using lithographic or holographic implements, various polymer patterns were produced by employing nematic LCs as reaction solvents and spatially nonuniform electric fields. The nematic mixture, containing 5.0 wt.% RMs and sandwiched between patterned electrodes, was exposed to spatially uniform reaction-initiating radiation. The spatially nonuniform electric field induced periodic optical patterns in the reaction template with spatially varying elastic deformations. The resulting polymerized RM networks were both spatially and optically patterned, with good fidelity with respect to the electrode pattern and subsequent periodic director profiles. The spatial distribution of dense RM networks coincided precisely with the profile of highly deformed regions in the reaction medium. The optical birefringence of the polymer network was templated by the local director of the reaction template. Numerical calculations of director configuration and the associated elastic energy of the reaction template precisely matched the spatial and orientational order of polymerized RM networks. The proposed method provides ease and flexibility in forming organized polymer architectures for functional materials that require both positional and orientational order for their applications. NPG Asia Materials (2017) 9, e429; doi:10.1038/am.2017.151; published online 25 August 2017 INTRODUCTIONProcessing soft matter with various functionalities is critical for organic electronic and photonic applications. Soft materials provide conformational, processing and design advantages in effectively exploiting the desired properties of small molecules on longer length scales. 1,2 However, making functional materials is only the first step. To realize and optimize the performance of practical devices, patterning in one or more dimensions is frequently required to achieve both spatial distribution and orientational order in their collective assembly. [3][4][5][6][7][8] The materials' functionality and potential for application are severely compromised if they cannot be effectively processed using straightforward techniques.In this context, liquid crystals (LCs) have attracted great attention as a typical example of self-assembling soft materials with electronic and photonic functionalities. 7-10 Because of their mesomorphic behaviors, particularly their electrical and optical anisotropies with respect to dynamic fluidity, LCs have been intensively studied for several decades. LC-polymer composites in particular have been broadly investigated for electro-optical applications. 11-13 Polymerization of reactive mesogens (RMs) in LC phases has been widely explored for the stabilization of particular optical states, for the modification of electro-optical properties and for templating the orientational orde...

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Spatial and Orientational Templating of Semiconducting Polymers in a Cholesteric Liquid Crystal

Cited by 42 publications

References 32 publications

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

Polymer electrolyte liquid crystal system for improved optical and electrical properties

Optically and spatially templated polymer architectures formed by photopolymerization of reactive mesogens in periodically deformed liquid crystals

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