Highly conductive polyacetylene film prepared by the liquid crystal polymerization method under magnetic field

Akagi, Kazuo; Katayama, S.; Shirakawa, Hideki; Araya, Kotaro; Mukoh, Akio; Narahara, Toshikazu

doi:10.1016/0379-6779(87)90744-2

Cited by 117 publications

(25 citation statements)

References 12 publications

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“…[44][45][46][47][48] This approach affords an alignment of even ultrathin films with semitransparency that is suitable for measurements of nonlinear optics. 49 The macroscopically aligned PA films prepared in a nematic liquid crystal under the gravity flow and magnetic field show high conductivities of 10 4 S/cm after iodine doping, and anisotropies of ca.…”

Section: Background Of Polyacetylene (Pa)mentioning

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: Background Of Polyacetylene (Pa)mentioning

confidence: 99%

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

2009

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“…To circumvent this problem, magnetically aligned CLCs have been used to synthesize highly oriented helical polyacetylene fibrils that exhibit distinct behavior compared to their planar counterparts. Macroscopic alignment of CLCs are achieved by applying magnetic fields prior to performing the polymerization of acetylene gas on the surface of the self‐organized helical superstructure . The free surface of the CLC reaction media plays a critical role in determining the final morphology of the helical polyacetylene since the polymerization of acetylene occurs at the interface between acetylene gas and CLCs.…”

Section: Control Of the Helical Axis Of Clcs By Different Stimulimentioning

confidence: 99%

“…Akagi et al have prepared highly oriented polyacetylene films using magnetic field in the CLC solvent . These polyacetylene fibrils exhibited high value of electrical conductivity compared to the polyacetylenes prepared in CLC solvents without magnetic field.…”

Section: Control Of the Helical Axis Of Clcs By Different Stimulimentioning

confidence: 99%

Stimuli‐Driven Control of the Helical Axis of Self‐Organized Soft Helical Superstructures

2018

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Supramolecular and macromolecular functional helical superstructures are ubiquitous in nature and display an impressive catalog of intriguing and elegant properties and performances. In materials science, self-organized soft helical superstructures, i.e., cholesteric liquid crystals (CLCs), serve as model systems toward the understanding of morphology- and orientation-dependent properties of supramolecular dynamic helical architectures and their potential for technological applications. Moreover, most of the fascinating device applications of CLCs are primarily determined by different orientations of the helical axis. Here, the control of the helical axis orientation of CLCs and its dynamic switching in two and three dimensions using different external stimuli are summarized. Electric-field-, magnetic-field-, and light-irradiation-driven orientation control and reorientation of the helical axis of CLCs are described and highlighted. Different techniques and strategies developed to achieve a uniform lying helix structure are explored. Helical axis control in recently developed heliconical cholesteric systems is examined. The control of the helical axis orientation in spherical geometries such as microdroplets and microshells fabricated from these enticing photonic fluids is also explored. Future challenges and opportunities in this exciting area involving anisotropic chiral liquids are then discussed.

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“…CP-NWs have been intensively studied, because of their extraordinary properties and their potential for commercial applications [17]. Polypyrrole nanowires (PPy-NWs) have excellent magnetic, optical, and tuneable electrical properties [18,19]. Besides, their biocompatibility [20] and flexible electrochemical or chemical synthesis routes, they offer several advantages over others nanostructures [21].…”

Section: Introductionmentioning

confidence: 99%

Large areain situfabrication of poly(pyrrole)-nanowires on flexible thermoplastic films using nanocontact printing

García‐Cruz¹,

Lee²,

Marote³

et al. 2016

Mater. Res. Express

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Abstract:Highly efficient nano-engineering tools will certainly revolutionize the biomedical and sensing devices research and development in the years to come. Here, we present a novel high performance conducting poly(pyrrole) nanowires (PPy-NW) patterning technology on thermoplastic surfaces (poly(ethylene terephthalate (PETE), poly(ethylene 2,6-naphthalate (PEN), polyimide (PI), and cyclic olefin copolymer (COC)) using nanocontact printing and controlled chemical polymerization (nCP-CCP) technique. The technique uses a commercial compact disk (CD) as a template to produce nanopatterned polydimethylsiloxane (PDMS) stamps. The PDMS nanopatterned stamp was applied to print the PPy-NWs and the developed technology of nCP-CCP produced 3D conducting nanostructures. This new and very promising nanopatterning technology was achieved in a single step and with a low cost of fabrication over large areas.

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Highly conductive polyacetylene film prepared by the liquid crystal polymerization method under magnetic field

Cited by 117 publications

References 12 publications

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

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

Stimuli‐Driven Control of the Helical Axis of Self‐Organized Soft Helical Superstructures

Large areain situfabrication of poly(pyrrole)-nanowires on flexible thermoplastic films using nanocontact printing

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