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Surfactant Directed Growth of Gold Metal Nanoplates by Chemical Vapor Deposition

27-Aug-2015 | Matthew B. E. Griffiths; Sara E. Koponen; David J. Mandia; Jennifer F. McLeod; Jason P. Coyle; Jeffrey J. Sims; Javi ..., Chemistry of Materials, 2015

Surface supported, low dimensional gold nanostructures are of interest for plasmonic applications. Low dimensional nanostructures are readily accessible by solution-phase growth, where shape control through the addition of growth-directing surfactants is well established. Yet, shape control in ...

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Gelation of Fmoc-diphenylalanine is a first order phase transition

26-Aug-2015 | Nikola A. Dudukovic; Charles F. Zukoski, Soft Matter, 2015

We explore the gel transition of the aromatic dipeptide derivative molecule fluorenylmethoxycarbonyl-diphenylalanine (Fmoc-FF). The addition of water to a solution of Fmoc-FF in dimethyl sulfoxide (DMSO) results in increased attractions leading to self-assembly of Fmoc-FF molecules into a ...

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Preparation of halloysite nanotubes coated with Eudragit for a controlled release of thyme essential oil

24-Aug-2015 | Min Hyeock Lee, Hyun Jin Park, Journal of Applied Polymer Science, 2015

ABSTRACT Active food packaging that releases active agents can extend the shelf‐life and improve the quality and safety of food products. Essential oils have been used as natural food preservatives due to their antioxidant, antimicrobial, and anti‐insect properties. However, one of the ...

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Synthesis and characterization of alternating copolymers containing bipyridine and phenylene vinylene for fluorescent chemosensors

24-Aug-2015 | Chin‐Yang Yu, Pin‐Ying Chen, Yi‐Hao Lin, Pei‐Jia Ciou, Journal of Applied Polymer Science, 2015

ABSTRACT Alternating copolymers containing bipyridine and phenylene vinylene were synthesized through a Wittig condensation reaction of their corresponding diphosphonium salts and dialdehydes. The molecular weights of the resulting polymers were relatively low because of the low solubility in ...

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Surface modification of TiO2 nanoparticles and preparation of TiO2/PDMS hybrid membrane materials

19-Aug-2015 | Tianjian Yang, Shoushan Sang, Xiao Zhao, Ziyong Zhang, Huaxin Rao, Polymer Composites, 2015

TiO2 nanoparticles were surface‐modified by a convenient and mild sol–gel method. A novel hybrid membrane material was prepared by crosslinking reaction based on poly(dimethylsiloxane) (PDMS) as organic matrix and TiO2 nanoparticles as inorganic filler as well as a crosslinking agent. The ...

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Reverse Catalase Reaction: Dioxygen Activation via Two-Electron Transfer from Hydroxide to Dioxygen Mediated By a Manganese(III) Salen Complex

19-Aug-2015 | Takuya Kurahashi, Inorganic Chemistry, 2015

Although atmospheric dioxygen is regarded as the most ideal oxidant, O2 activation for use in oxygenation reactions intrinsically requires a costly sacrificial reductant. The present study investigated the use of aqueous alkaline solution for O2 activation. A manganese(III) salen complex, ...

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Stable Four‐Coordinate Guanidinatosilicon(IV) Complexes with SiN3El Skeletons (El=S, Se, Te) and SiEl Double Bonds

18-Aug-2015 | Felix M. Mück, Dorit Kloß, Johannes A. Baus, Christian Burschka, Rüdiger Bertermann, Jordi Poater, Célia Fonseca Gue ..., Chemistry - A European Journal, 2015

Abstract To get information about the reactivity profile of the donor‐stabilized guanidinatosilicon(II) complexes 2 and 3, a series of oxidative addition reactions was studied. Treatment of 2 and 3 with S8, Se, or Te afforded the respective four‐coordinate silicon(IV) complexes 8–10 and 12–14, ...

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An Investigation of Epoxy/Thermoplastic Blends Based on Addition of a Novel Copoly(aryl ether nitrile) Containing Phthalazinone and Biphenyl Moieties

18-Aug-2015 | Rui Liu, Jinyan Wang, Jinlong Li, Xigao Jian, Polymer International, 2015

Abstract In this article, a novel soluble copoly(aryl ether nitrile) containing phthalazinone and biphenyl moieties (PPBEN) was synthesized to improve the impact resistance of tetraglycidyl 4,4'‐diaminodiphenylmethane (TGDDM) epoxy resin cured with 4,4‐diaminodiphenylsulfone (DDS) for the ...

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Dielectric properties of poly(4‐vinylphenol) with embedded PbO nanoparticles

18-Aug-2015 | WooJe Han, Hong‐Sub Lee, Uzma K. H. Bangi, Byungwook Yoo, Hyung‐Ho Park, Polymers for Advanced Technologies, 2015

An organic/inorganic nanocomposite film was synthesized using poly(4‐vinylphenol) (PVPh) as an organic insulating polymer and PbO nanoparticles as a high‐k inorganic material to serve as an organic insulator with enhanced dielectric properties. PbO nanoparticles were dispersed into propylene ...

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Fluorescence chemical sensor based on water‐soluble poly(p‐phenylene ethynylene)–graphene oxide composite for Cu2+

18-Aug-2015 | Naoya Adachi, Mai Nakajima, Mari Okada, Masafumi Sugeno, Takayuki Norioka, Polymers for Advanced Technologies, 2015

A chemical sensor for metal ions was fabricated based on a water‐soluble conjugated polymer–graphene oxide (GO) composite. Water‐soluble poly(p‐phenylene ethynylene) (PPE) with sulfonic acid side chain groups was used to prepare a very stable water‐soluble PPE–GO composite with strong π–π ...

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