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Hybrid Poly (hybrid + poly)

Distribution by Scientific Domains

Polymers and Materials Science	100%

Selected Abstracts

Temperature Responsive Solution Partition of Organic,Inorganic Hybrid Poly(N -isopropylacrylamide)-Coated Mesoporous Silica Nanospheres,

ADVANCED FUNCTIONAL MATERIALS, Issue 9 2008
Po-Wen Chung
Abstract A series of poly(N -isopropylacrylamide)-coated mesoporous silica nanoparticle materials (PNiPAm-MSNs) has been synthesized by a surface-initiated living radical polymerization with a reversible addition,fragmentation chain transfer (RAFT) reaction. The structure and the degree of polymerization of the PNiPAm-MSNs has been characterized by a variety of techniques, including nitrogen sorption analysis, 29Si and 13C solid-state NMR spectroscopy, transmission electron microscopy (TEM), and powder X-ray diffraction (XRD). The thermally induced changes of the surface properties of these polymer-coated core,shell nanoparticles have been determined by examining their partition activities in a biphasic solution (water/toluene) at different temperatures. [source]

A Hybrid Poly(ethylene oxide)/ Poly(vinylidene fluoride)/TiO2 Nanoparticle Solid-State Redox Electrolyte for Dye-Sensitized Nanocrystalline Solar Cells,

ADVANCED FUNCTIONAL MATERIALS, Issue 12 2005
W. Han
Abstract High-efficiency all-solid-state dye-sensitized nanocrystalline solar cells have been fabricated using a poly(ethylene oxide)/poly(vinylidene fluoride) (PEO/PVDF)/TiO2 -nanoparticle polymer redox electrolyte, which yields an overall energy-conversion efficiency of about 4.8,% under irradiation by white light (65.2,mW,cm,2). The introduction of PVDF (which contains the highly electronegative element fluorine) and TiO2 nanoparticles into the PEO electrolyte increases the ionic conductivity (by about two orders of magnitude) and effectively reduces the recombination rate at the interface of the TiO2 and the solid-state electrolyte, thus enhancing the performance of the solar cell. [source]

Novel Structured Composites Formed from Gold Nanoparticles and Diblock Copolymers

MACROMOLECULAR RAPID COMMUNICATIONS, Issue 12 2007
Xi Chen
Abstract We report a simple procedure to prepare a novel Au-micelle composite with a core-shell-corona structure. This composite is prepared by reduction of tetrachloroauric acid (HAuCl4,·,3H2O) in dilute aqueous solution containing polystyrene- block -poly(4-vinylpyridine) micelles and poly(ethylene oxide)- block -poly(4-vinylpyridine) copolymers. The micelles with a polystyrene core and a poly(4-vinylpyridine) shell are transformed into Au-micelle composites with a polystyrene core, a swollen hybrid Au/poly(4-vinylpyridine) inner shell, and a poly(ethylene oxide) corona by direct physisorption of gold particles with poly(4-vinylpyridine) chains. [source]

Template-Directed Liquid ALD Growth of TiO2 Nanotube Arrays: Properties and Potential in Photovoltaic Devices

ADVANCED FUNCTIONAL MATERIALS, Issue 9 2010
Thelese R. B. Foong
Abstract Dense and well-aligned arrays of TiO2 nanotubes extending from various substrates are successfully fabricated via a new liquid-phase atomic layer deposition (LALD) in nanoporous anodic alumina (AAO) templates followed by alumina dissolution. The facile and versatile process circumvents the need for vacuum conditions critical in traditional gas-phase ALD and yet confers ALD-like deposition rates of 1.6,2.2,Å cycle,1, rendering smooth conformal nanotube walls that surpass those achievable by sol,gel and Ti-anodizing techniques. The nanotube dimensions can be tuned, with most robust structures being 150,400,nm tall, 60,70,nm in diameter with 5,20,nm thick walls. The viability of TiO2 nanotube arrays deposited on indium tin oxide (ITO),glass electrodes for application in model hybrid poly(3-hexylthiophene) (P3HT):TiO2 solar cells is studied. The results achieved provide platforms and research directions for further advancements. [source]

Highly CO2 -Permeable and Selective Polymer Nanocomposite Membranes,

ADVANCED MATERIALS, Issue 9 2003
N.P. Patel
As technologies turn to more efficient routes to remove CO2 from mixed gas streams for H2 or air purification, new cost-effective multifunctional materials are needed for the separation processes. Here, hybrid poly(ethylene glycol)/fumed silica nanocomposite membranes exhibiting high CO2/H2 selectivity (>,11) and CO2 permeability (,,83 Barrer), as well as robust mechanical properties and optical clarity, are reported (see Figure). [source]