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Polymer Nanostructures (polymer + nanostructure)

Distribution by Scientific Domains
Polymers and Materials Science100%

Kinds of Polymer Nanostructures

  • conducting polymer nanostructure
    		•

    Selected Abstracts

    Highly Fluorinated Comb-Shaped Copolymers as Proton Exchange Membranes (PEMs): Improving PEM Properties Through Rational Design,

    ADVANCED FUNCTIONAL MATERIALS, Issue 14 2006
    B. Norsten
    Abstract A new class of comb-shaped polymers for use as a proton conducting membrane is presented. The polymer is designed to combine the beneficial physical, chemical, and structural attributes of fluorinated Nafion-like materials with higher-temperature, polyaromatic-based polymer backbones. The comb-shaped polymer unites a rigid, polyaromatic, hydrophobic backbone with lengthy hydrophilic polymer side chains; this combination affords direct control over the polymer nanostructure within the membrane and results in distinct microphase separation between the opposing domains. The microphase separation serves to compartmentalize water into the hydrophilic polymer side chain domains, resulting in effective membrane water management and excellent proton conductivities. [source]

    Fabrication of novel conjugated polymer nanostructure: Porphyrins and fullerenes conjugately linked to the polyacetylene backbone as pendant groups

    JOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 13 2005
    Ning Wang
    Abstract A new series of conjugated polyacetylenes with conjugately linked fullerene and porphyrin groups as pendant units were prepared by a copolymerization reaction catalyzed by chloronorbornadiene rhodium(I)dimer-triethylamine ([Rh(nbd)Cl]2 -NEt3) in anhydrous CHCl3. These polymers were characterized with UV,vis spectroscopy, fluorescence spectroscopy, and voltammetry. Scanning electron microscopy indicated that the morphology of the copolymers consisted of uniform nanorods with a diameter of about 100 nm and a length of about 300 nm. Thin films of the copolymers produced steady and prompt photocurrent at an irradiation of 20.0 mW cm,2 of white light, which was higher than that of a mixture of poly[5-(4-Ethynyl-phenyl)-10,15,20-tris(4-carbomethoxyphenyl)porphyrin zinc] and C60. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 2851,2861, 2005 [source]

    Three-Dimensional Nanostructures for Photonics

    ADVANCED FUNCTIONAL MATERIALS, Issue 7 2010
    Georg von Freymann
    Abstract Recent progress in direct laser writing of three-dimensional (3D) polymer nanostructures for photonics is reviewed. This technology has reached a level of maturity at which it can be considered as the 3D analogue of planar electron-beam lithography. Combined with atomic-layer deposition and/or chemical-vapor deposition of dielectrics,the 3D analogues of planar evaporation technologies, the 3D polymer templates can be converted or inverted into 3D high-refractive-index-contrast nanostructures. Examples discussed in this review include positive and inverse 3D silicon-based woodpile photonic crystals possessing complete photonic bandgaps, novel optical resonator designs within these structures, 3D chiral photonic crystals for polarization-state manipulation, and 3D icosahedral photonic quasicrystals. The latter represent a particularly complex 3D nanostructure. [source]

    Neural Interface Biomaterials: Multifunctional Nanobiomaterials for Neural Interfaces (Adv. Funct.

    ADVANCED FUNCTIONAL MATERIALS, Issue 4 2009
    Mater.
    Neural electrodes are designed to interface with the nervous system and provide control signals for neural prostheses. However, robust and reliable chronic recording and stimulation remains a challenge for neural electrodes. On page 573, Mohammad Reza Abidian and David Martin report a novel method for the fabrication of soft, low impedance, high charge density, and controlled releasing nanobiomaterials that can be applied for neural interfaces using drug loaded nanofibers, 3D conducting polymer nanostructures (PEDOT), and alginate hydrogel. [source]

    Precisely Defined Heterogeneous Conducting Polymer Nanowire Arrays , Fabrication and Chemical Sensing Applications

    ADVANCED MATERIALS, Issue 20 2009
    Yixuan Chen
    Heterogeneous conducting polymer nanostructures are fabricated using a newly developed method. Completely isolated nanowires of several conducting polymer materials can be fabricated side-by-side with perfect registry to each other on a rigid or flexible substrate. Results of a chemical sensing study using PPY and PEDOT nanowires are presented (see figure). [source]

    1D Conducting Polymer Nanostructures: One-Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications (Adv. Mater.

    ADVANCED MATERIALS, Issue 14-15 2009
    15/2009)
    One-dimensional conducting polymer nanostructures hold great promise for many technological applications and can be chemically synthesized in bulk quantities using either template or template-free strategies. Richard Kaner and co-workers highlight on page 1487 recent research activities in this field and present their perspectives on the main challenges and future research directions for this new class of nanomaterials. [source]

    One-Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

    ADVANCED MATERIALS, Issue 14-15 2009
    Henry D. Tran
    Abstract This Progress Report provides a brief overview of current research activities in the field of one-dimensional (1D) conducting polymer nanostructures. The synthesis, properties, and applications of these materials are outlined with a strong emphasis on recent literature examples. Chemical methods that can produce 1D nanostructures in bulk quantities are discussed in the context of two different strategies: 1) procedures that rely on a nanoscale template or additive not inherent to the polymer and 2) those that do not. The different sub-classifications of these two strategies are delineated and the virtues and vices of each area are discussed. Following this discussion is an outline of the properties and applications of 1D conducting polymer nanostructures. This section focuses on applications in which nanostructured conducting polymers are clearly advantageous over their conventional counterparts. We conclude with our perspective on the main challenges and future research directions for this new class of nanomaterials. This Progress Report is not intended as a comprehensive review of the field, but rather a summary of select contributions that we feel will provide the reader with a strong basis for further investigation into this fast emerging field. [source]