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57.693 Aktuelle Fachpublikationen zum Thema temperature

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Size- and temperature-dependent Young’s modulus and size-dependent thermal expansion coefficient of thin films

22.07.2016 | Tong-Yi Zhang; Xiaoye Zhou; Baoling Huang, Physical Chemistry Chemical Physics, 2016

Nanomaterials possess high surface/volume ratio and surfaces play an essential role in the size-dependent material properties. In the present study, nanometer-thick thin films were taken as an ideal system to investigate the surface-induced temperature- and size-dependent Young’s modulus and ...

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CsBi4Te6: a new facile synthetic method and mid-temperature thermoelectric performance

22.07.2016 | Hua Lin; Hong Chen; Ju-Song Yu; Yu-Jun Zheng; Peng-Fei Liu; Muhammad Ali Khan; Li-Ming Wu, Dalton Transactions, 2016

CsBi4Te6 is one of the best performing low-temperature thermoelectric (TE) materials. However, it has not received worldwide intensive investigation due to the limitation of synthetic methods. Here we report a new facile approach by not using the reactive Cs metal and the mid-temperature TE ...

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2,6-Diiminopiperidin-1-ol: an overlooked motif relevant to uranyl and transition metal binding on poly(amidoxime) adsorbents

22.07.2016 | Zachary C. Kennedy; Allan Jay P. Cardenas; Jordan F. Corbey; Marvin G. Warner, Chemical Communication, 2016

Glutardiamidoxime, a structural motif on sorbents used in uranium extraction from seawater, was discovered to cyclize in situ at room temperature to 2,6-diimino-piperidin-1-ol in the presence of uranyl nitrate. The new diimino motif was also generated when exposed to competing transition metals ...

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Self-assembly of PEGylated gold nanoparticles with satellite structures as seeds

22.07.2016 | Marie Bachelet; Rongjun Chen, Chemical Communication, 2016

We report a very simple method for the self-assembly of spherical gold nanoparticles (AuNPs), coated with poly(ethylene glycol) (PEG), through a slow evaporation process at room temperature. Clusters of particles forming satellite structures may act as seeds for the self-assembly in a ...

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Evaluation of the energy barrier for failure of Au atomic contact based on temperature dependent current-voltage characteristics

22.07.2016 | Akira Aiba; Satoshi Kaneko; Shintaro Fujii; Tomoaki Nishino; Manabu Kiguchi, Physical Chemistry Chemical Physics, 2016

We investigated mechanical stability of single gold atomic contacts at applied bias voltage of 0–1 V using nano-fabricated mechanically controllable break junction technique at 300–400 K in ambient conditions. The single atomic contact shows the quantized conductance (G0 = 2e2/h) and can carry ...

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A simple procedure for the production of large ferromagnetic cobalt nanoparticles

22.07.2016 | Rebecca O. Fuller; Bee-Min Goh; George A. Koutsantonis; Matthys J. Loedolff; Martin Saunders; Robert C. Woodward, Dalton Transactions, 2016

Epsilon cobalt (ε-Co) nanoparticles in a number of octahedral morphologies have been synthesised. The particles are polycrystalline, with sizes in the order of 30 nm. Magnetic studies reveal the particles are ferromagnetic, with a room temperature saturation magnetisation of 131 emu g−1. Unlike ...

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Synthesis of high-purity, layered structured K2Ta4O11 intermediate phase nanocrystals for photocatalytic water splitting

21.07.2016 | Ping Wang; Feng Sun; Jin Hyun Kim; Ju Hun Kim; JunHe Yang; XianYing Wang; Jae Sung Lee, Physical Chemistry Chemical Physics, 2016

High-purity K2Ta4O11 (kalitantite) intermediate phase with a layered structure, as a new family member of alkali-metal tantalate semiconductors, was successfully prepared via a simple and cost-effective flux growth technique using potassium chloride (KCl) at a low temperature of 800 °C for only 4 ...

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Temperature-Controlled Redox-Neutral Ruthenium(II) Catalyzed Regioselective Allylation of Benzamides with Allylic Acetates

19.07.2016 | Rajendhran Manikandan; Masilamani Jeganmohan, Organic & Biomolecular Chemistry, 2016

Substituted aromatic amides reacted efficiently with allylic acetates in the presence of a cationic ruthenium complex in ClCH2CH2Cl at room temperature providing ortho allylated benzamides in a highly regioselective manner without any oxidant and base. The whole catalytic has occurred in a Ru(II) ...

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First Evidence of Metal Transfer into Hydrophobic Deep Eutectic and Low-Transition-Temperature Mixtures: Indium Extraction from Hydrochloric and Oxalic Acids

19.07.2016 | Evgeny Tereshatov; Maria Boltoeva; Charles M Folden III, Green Chemistry, 2016

This is the first report on metallic species transfer from aqueous solution into hydrophobic deep eutectic and low-transition-temperature mixtures. The near-critical and strategic metal, indium, has been successfully extracted from hydrochloric and oxalic acid media into quaternary ammonium- and ...

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Band Inversion and Topological Aspects in TiNI Monolayer

19.07.2016 | Aizhu Wang; Zhenhai Wang; Aijun Du; Mingwen Zhao, Physical Chemistry Chemical Physics, 2016

To achieve the device application of quantum spin Hall (QSH) effect, increasing the critical temperature is crucial. Two-dimensional topological insulator (2D-TI) with a sizeable bulk band gap is one of the most promising strategies to reach this goal. Using first-principles calculations, we ...

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