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Tuning the Kinetics and Energetics of Diels−Alder Cycloaddition Reactions to Improve Poling Efficiency and Thermal Stability of High-Temperature Cross-Linked Electro-Optic Polymers

Zhengwei Shi、Wenkel Liang、Jingdong Luo 等 9 位作者2010-09-07Chemistry of Materials

A comprehensive theoretical and experimental study of the bromo effect on Diels−Alder (DA) and retro-Diels−Alder (rDA) reactions between the anthracene-containing dienes and maleimide dienophile has been conducted to improve thermal stability and poling efficiency of electro-optic (EO) polymers. Calculations with dens…

Molecular Junctions and NanostructuresNonlinear Optical Materials ResearchSynthesis and properties of polymers

Phenylene Bridged Boron−Nitrogen Containing Dendrimers

Agnieszka Proń、Martin Baumgarten、Kläus Müllen2010-09-07Organic Letters

The synthesis and characterization of novel phenylene bridged boron-nitrogen containing π-conjugated dendrimers N3B6 and N3B3, with peripheral boron atoms and 1,3,5-triaminobenzene moiety as a core, are presented. UV-vis absorption and emission measurements reveal that the optical properties of the resulting compounds…

Conducting polymers and applicationsLuminescence and Fluorescent MaterialsOrganoboron and organosilicon chemistry

Electrospun cross‐linked gelatin fibers with controlled diameter: The effect of matrix stiffness on proliferative and biosynthetic activity of chondrocytes cultured in vitro

Maciej Skotak、Sandra Noriega、Gustavo Larsen 等 4 位作者2010-09-07Journal of Biomedical Materials Research Part A

Nanofibrous scaffolds were prepared from gelatin solutions and were further cross-linked with glutaraldehyde (GA). The fiber diameter was varied from 100 to 1000 nm by controlling the applied voltage (4-15 kV) and the concentration of the gelatin solution (4-15%). The tensile moduli and the tensile strength of the non…

Bone Tissue Engineering MaterialsElectrospun Nanofibers in Biomedical ApplicationsSilk-based biomaterials and applications

Combined Chemo-immunotherapy as a Prospective Strategy To Combat Cancer: A Nanoparticle Based Approach

Aniruddha Roy、Manu Smriti Singh、Pramod Upadhyay 等 4 位作者2010-09-07Molecular Pharmaceutics

The prime objective of this study was to develop a combined chemo-immunotherapeutic formulation which could directly kill cancer cells as well as activate the immunosuppressed tumor microenvironment to mount a robust antitumor immune response. Paclitaxel (PTX) and SP-LPS (nontoxic derivative of lipopolysaccharide) wer…

Nanoparticle-Based Drug DeliveryImmunotherapy and Immune ResponsesCancer Treatment and Pharmacology

Functionalization of Silk Fibroin with NeutrAvidin and Biotin

Xiaoqin Wang、David L. Kaplan2010-09-07Macromolecular Bioscience

New methods are needed to modify silk biomaterials with bioactive molecules for tissue engineering and drug delivery. In the present study, silk fibroin in solution or in microsphere format was coupled with NeutrAvidin via carbodiimide chemistry. Silk fibroin retained its self-assembly features after reaction. It was…

Antimicrobial Peptides and ActivitiesSilk-based biomaterials and applicationsBiochemical and Structural Characterization

Grafted cellulose strands on the surface of silica: effect of environment on reactivity

Oz M. Gazit、Alexandre Charmot、Alexander Katz2010-09-07Chemical Communications

The design, synthesis and characterization of materials consisting of grafted poly(1 → 4-β-glucan) strands on silica is reported. The silanol-rich environment provided in these materials activates the glycosidic bond for hydrolysis under mild conditions.

Enzyme Catalysis and ImmobilizationAdvanced Cellulose Research StudiesMesoporous Materials and Catalysis

Functionalization of Polymer Nanoparticles by Thiol−Ene Addition

Brigitte Korthals、Maria C. Morant‐Miñana、Marius R. Schmid 等 4 位作者2010-09-07Macromolecules

Syndiotactic 1,2-polybutadiene nanoparticles (volume average diameter 13 nm) were functionalized in aqueous dispersion by free radical mercaptan addition. By appropriate choice of both water-soluble radical initiator and mercaptan concentration, nanoparticles with a degree of functionalization of up to 85% were prepar…

Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers

Electrochemical synthesis of poly(3,4‐ethylenedioxythiophene) nanotube arrays using ZnO templates

Markus Döbbelin、Ramón Tena‐Zaera、Pedro M. Carrasco 等 6 位作者2010-09-07Journal of Polymer Science Part A Polymer Chemistry

Abstract A new method toward vertically oriented poly(3,4‐ethylenedioxythiophene) (PEDOT) nanotube arrays on transparent conductive oxide substrates is presented. The approach is based on the use of ZnO nanowire arrays as templates for the electropolymerization of PEDOT. Robust arrays of vertically oriented PEDOT nano…

Supercapacitor Materials and FabricationAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications

Device Physics and Characteristics of Graphene Nanoribbon Tunneling FETs

Sai-Kong Chin、Dawei Seah、Kai‐Tak Lam 等 5 位作者2010-09-07IEEE Transactions on Electron Devices

We present a detailed simulation study on the current-voltage characteristics of ballistic graphene nanoribbon (GNR) tunneling FETs of different widths with varying temperatures and channel length. Our model uses the self-consistent nonequilibrium Green's function and the quasi-2-D Poisson solver with the material det…

Graphene research and applicationsQuantum and electron transport phenomenaAdvancements in Semiconductor Devices and Circuit Design

A Triple‐Decker Heptadecanuclear (CuII)15(CrIII)2 Complex Assembled from Pentanuclear Metallacrowns

Anna V. Pavlishchuk、Sergey V. Kolotilov、Mat­thias Zeller 等 7 位作者2010-09-07European Journal of Inorganic Chemistry

Abstract Reaction of the pentanuclear Cu II metallacrown [Cu 5 (ahpha) 4 ](ClO 4 ) · 4H 2 O (ahpha 2– is the dianion of 3‐amino‐3‐(hydroximino)propanehydroxamic acid), with Cr(C 2 O 4 ) 3 3– led to the formation of a heptadecanuclear complex {[Cu 5 (ahpha) 4 ] 3 [Cr(C 2 O 4 ) 3 ] 2 · 4H 2 O} · 8H 2 O ·1 /3(DMF) ( 1· 8…

Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes

Nanoparticles for Improved Therapeutics and Imaging in Cancer Therapy

Devika B. Chithrani2010-09-07Recent Patents on Nanotechnology

Nanotechnology involves creation and utilization of materials, devices or systems on the nanometer scale. The field of nanotechnology is currently undergoing explosive development on many fronts. The technology is expected to generate innovations and play a critical role in drug delivery and imaging. There has been tr…

Nanoparticle-Based Drug DeliveryGold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniques

Ab initioinvestigation of lithium on the diamond C(100) surface

Kane M. O’Donnell、T. Martin、Neil A. Fox 等 4 位作者2010-09-07Physical Review B

We have performed ab initio calculations to investigate the adsorption of Li onto the clean and oxygenated diamond C(100) surface. Despite a large amount of interest in alkali-metal absorption on clean and oxidized semiconductor surfaces for both fundamental and technological applications, lithium adsorption on the di…

High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchElectronic and Structural Properties of Oxides

Synthesis, photoluminescence, and electrochromism of polyamides containing (3,6‐di‐tert‐butylcarbazol‐9‐yl)triphenylamine units

Huimin Wang、Sheng‐Huei Hsiao、Guey‐Sheng Liou 等 4 位作者2010-09-07Journal of Polymer Science Part A Polymer Chemistry

Abstract A new carbazole‐derived, triphenylamine (TPA)‐containing aromatic dicarboxylic acid monomer, 4,4′‐dicarboxy‐4″‐(3,6‐di‐ tert ‐butylcarbazol‐9‐yl)TPA, was synthesized, and it led to a series of electroactive aromatic polyamides with main‐chain TPA and pendent 3,6‐bis( tert ‐butyl)carbazole units by reacting it…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsTransition Metal Oxide Nanomaterials

Novel ‘Nano in Nano’ Composites for Sustained Drug Delivery: Biodegradable Nanoparticles Encapsulated into Nanofiber Non‐Wovens

Moritz Beck‐Broichsitter、Marcel Thieme、Juliane Nguyen 等 9 位作者2010-09-07Macromolecular Bioscience

Novel 'nano in nano' composites consisting of biodegradable polymer nanoparticles incorporated into polymer nanofibers may efficiently modulate drug delivery. This is shown here using a combination of model compound-loaded biodegradable nanoparticles encapsulated in electrospun fibers. The dye coumarin 6 is used as mo…

Advanced Sensor and Energy Harvesting MaterialsElectrospun Nanofibers in Biomedical ApplicationsElectrohydrodynamics and Fluid Dynamics

Preparation of highcis‐1,4 polyisoprene with narrow molecular weight distribution via coordinative chain transfer polymerization

Changliang Fan、Chenxi Bai、Hongguang Cai 等 6 位作者2010-09-07Journal of Polymer Science Part A Polymer Chemistry

Abstract High cis ‐1,4 polyisoprene with narrow molecular weight distribution has been prepared via coordinative chain transfer polymerization (CCTP) using a homogeneous rare earth catalyst composed of neodymium versatate (Nd(vers) 3 ), dimethyldichlorosilane (Me 2 SiCl 2 ), and diisobutylaluminum hydride (Al( i ‐Bu)…

Organometallic Complex Synthesis and CatalysisAdvanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and properties

Molecular dynamics simulations of semicrystalline polymers: Crystallization, melting, and reorganization

Jens‐Uwe Sommer、Chuanfu Luo2010-09-07Journal of Polymer Science Part B Polymer Physics

Abstract Large‐scale molecular dynamics (MD) simulations of semicrystalline entangled polymers are carried out to explore crystallization and melting processes. Semicrystalline polymers are obtained from disordered melts via homogeneous nucleation. In the early stage of the crystallization process, the collective scat…

Polymer crystallization and propertiesMaterial Dynamics and PropertiesRheology and Fluid Dynamics Studies

Structure and “Surfactochromic” Properties of Conjugated Polyelectrolyte (CPE): Surfactant Complexes between a Cationic Polythiophene and SDS in Water

Matti Knaapila、Rachel C. Evans、Vasil M. Garamus 等 8 位作者2010-09-07Langmuir

We report on the phase transitions, solution structure, and consequent effect on the photophysical properties of poly[3-(6-trimethylammoniumhexyl)thiophene] bromide (P3TMAHT) in aqueous sodium dodecylsulfate (SDS). Polythiophene was mixed with SDS or deuterated SDS to form P3TMAHT(SDS)(x) complex (x = the molar ratio…

Conducting polymers and applicationsLuminescence and Fluorescent MaterialsPhotochromic and Fluorescence Chemistry

Carbon dioxide‐induced crystallization in poly(L‐lactic acid) and its effect on foam morphologies

Xia Liao、A. Victoria Nawaby、Pamela S. Whitfield2010-09-07Polymer International

Abstract The effect of carbon dioxide (CO 2 ) on the physical properties of poly( L ‐lactic acid) (PLLA) and on the formation of crystalline domains was investigated. The presence of CO 2 in the matrix was found to induce crystallization in PLLA, with the crystallinity increasing with increasing CO 2 pressure. The com…

biodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisPolymer Foaming and Composites

A High-Responsivity GaN Nanowire UV Photodetector

W. Y. Weng、Ting‐Jen Hsueh、Shoou‐Jinn Chang 等 6 位作者2010-09-07IEEE Journal of Selected Topics in Quantum Electronics

The authors report the conversion of β-Ga2O3nanowires (NWs) to GaN NWs through ammonification and the fabrication of a GaN NW photodetector (PD). Compared with conventional 2-D GaN PDs, it was found that we could achieve a 1000 times larger photocurrent from the GaN NW PD. It was also found that dynamic response of th…

ZnO doping and propertiesGaN-based semiconductor devices and materialsGa2O3 and related materials