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Component Materials (component + material)

Distribution by Scientific Domains

Polymers and Materials Science	75%

Selected Abstracts

Flexible Inorganic/Organic Hybrid Thin-Film Transistors Using All-Transparent Component Materials,

ADVANCED MATERIALS, Issue 20 2007
L. Wang
Inorganic-organic hybrid TFTs have been fabricated at room temperature using IAD-derived high-quality semiconducting In2O3 and a crosslinked spin-coatable polymer gate dielectric. TFTs exhibiting field-effect mobilities up to 160 cm2 V,1 s,1, on Si and 10 cm2 V,1 s,1 on PET substrates have been demonstrated. TFTs on PET combine good transport characteristics as well as optical transparency and flexibility. [source]

PEI,PEG,Chitosan-Copolymer-Coated Iron Oxide Nanoparticles for Safe Gene Delivery: Synthesis, Complexation, and Transfection

ADVANCED FUNCTIONAL MATERIALS, Issue 14 2009
Forrest M. Kievit
Abstract Gene therapy offers the potential of mediating disease through modification of specific cellular functions of target cells. However, effective transport of nucleic acids to target cells with minimal side effects remains a challenge despite the use of unique viral and non-viral delivery approaches. Here, a non-viral nanoparticle gene carrier that demonstrates effective gene delivery and transfection both in vitro and in vivo is presented. The nanoparticle system (NP,CP,PEI) is made of a superparamagnetic iron oxide nanoparticle (NP), which enables magnetic resonance imaging, coated with a novel copolymer (CP,PEI) comprised of short chain polyethylenimine (PEI) and poly(ethylene glycol) (PEG) grafted to the natural polysaccharide, chitosan (CP), which allows efficient loading and protection of the nucleic acids. The function of each component material in this nanoparticle system is illustrated by comparative studies of three nanoparticle systems of different surface chemistries, through material property characterization, DNA loading and transfection analyses, and toxicity assessment. Significantly, NP,CP,PEI demonstrates an innocuous toxic profile and a high level of expression of the delivered plasmid DNA in a C6 xenograft mouse model, making it a potential candidate for safe in vivo delivery of DNA for gene therapy. [source]

Towards Optimization of Materials for Dye-Sensitized Solar Cells

ADVANCED MATERIALS, Issue 45 2009
Yanhong Luo
Abstract Dye-sensitized solar cells (DSCs) have received widespread attention owing to their low cost, easy fabrication, and relatively high solar-to-electricity conversion efficiency. Based on the nanocrystalline TiO2 electrode, Ru-polypyridyl-complex dye, liquid electrolyte with I,/I3, redox couple, and Pt counter electrode, DSCs have already exhibited an efficiency above 11% and offer an appealing alternative to conventional solar cells. However, further improvements in the efficiency and stability are still required to drive forward practical application. These improvements require the cooperative optimization of the component materials, structures, and processing techniques. In this Research News article, recent progress in DSCs made by our group are reviewed, including some novel approaches to the synthesis of solid-state and environmentally friendly electrolytes, the fabrication of alternative low-cost nanostructural electrodes, and the control of recombination at the interfaces. [source]

Truss-type systems exhibiting negative compressibility

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11 2008
Joseph N. Grima
Abstract We propose novel two- and three-dimensional truss structures made from rods of different materials connected together through pin-joints to form triangular units which can exhibit anomalous compressibility properties. In particular, we show that these systems may be made to exhibit negative linear compressibility along certain directions or compressibilities that are even more positive than any of the component materials, i.e. the end product is a system with tunable compressibility properties that can be tailor made for particular practical applications. We also show that in specific cases, these systems can exhibit an overall negative area compressibility and sometimes even negative volumetric compressibility (i.e. negative bulk modulus) thus confirming that this property can indeed exist. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]