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46.669 Aktuelle Fachpublikationen zum Thema temperature

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Two-step magnetic switching in a mononuclear iron(II) complex around room temperature

21.04.2015 | Qian Yang; Xin Cheng; YeXin Wang; BingWu Wang; ZheMing Wang; Song Gao, Dalton Transactions, 2015

A neutral mononuclear Fe(ii) complex with spin crossover (SCO) properties, FeL2(SCN)2 (1) (L = 2-(2-(trifluoromethyl)phenyl)-1H-imidazo[4,5-f][1,10]phenanthroline), was solvothermally synthesized. It displays a new example of two-step SCO with Tc1↓ = 250 K, Tc1↑ = 260 K and Tc2 = 295 K.

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Au-Ag nanoalloy molecule-like clusters for enhanced quantum efficiency emission of Er3+ ions in silica

21.04.2015 | Tiziana Cesca; Boris Kalinic; Niccolò Tomaso Michieli; Chiara Maurizio; Angela Trapananti; Carlo Scian; Giancarlo Ba ..., Physical Chemistry Chemical Physics, 2015

The occurrence of a very efficient non-resonant energy transfer process form ultrasmall Au-Ag nanoalloy clusters and Er3+ ions is investigated in silica. The enhancement of the room temperature Er3+ emission efficiency by an order of magnitude is achieved by coupling the rare-earth ions to ...

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The structure of monoclinic Na2B10H10: a combined diffraction, spectroscopy, and theoretical approach

21.04.2015 | Hui Wu; Wan Si Tang; Wei Zhou; Vitalie Stavila; John J. Rush; Terrence J. Udovic, CrystEngComm, 2015

Neutron powder diffraction measurements of a specially synthesized Na211B10D10 compound, buttressed by comparative measurements and calculations of vibrational dynamics, have led to an improved, Rietveld-refined, structural model for its low-temperature monoclinic phase. The detailed atomic ...

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Rheological behavior of uncured styrene‐butadiene rubber at low temperatures, pure and filled with carbon black

18.04.2015 | Alice Crié, Claire Baritaud, Rudy Valette, Bruno Vergnes, Polymer Engineering and Science, 2015

The flow behavior of an uncured styrene‐butadiene rubber (SBR) has been studied by using a specific preshearing capillary rheometer in the range of temperatures encountered in extrusion, i.e. between 40°C and 90°C. A pure SBR and various SBR compounds filled with different amounts of carbon ...

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High‐throughput and comprehensive prediction of H2 adsorption in metal‐organic frameworks under various conditions

18.04.2015 | Yu Liu, Shuangliang Zhao, Honglai Liu, Ying Hu, AIChE Journal, 2015

Abstract High‐throughput prediction of H2 adsorption in MOF materials has been extended from a few specific conditions to the whole T, p space. The prediction is based on a classical density functional theory and has been implemented over 712 MOFs in 441 different conditions covering a wide ...

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Effect of Air‐Drying Temperature on the Quality and Bioactive Characteristics of Dried Galega Kale (Brassica oleracea L. var. Acephala)

17.04.2015 | Sara M. Oliveira, Inês N. Ramos, Teresa R.S. Brandão, Cristina L.M. Silva, Journal of Food Processing and Preservation, 2015

Abstract The objective of this work was to evaluate the drying characteristics and the effect of drying temperature on the quality characteristics of Galega kale without any pretreatment. Drying times of 330, 162, 78 and 51 min provided minimal moisture contents, using temperatures of 35, 50, ...

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Instrumentation of UL‐94 test: understanding of mechanisms involved in fire retardancy of polymers

17.04.2015 | Renaud Dupretz, Gaëlle Fontaine, Sophie Duquesne, Serge Bourbigot, Polymers for Advanced Technologies, 2015

A quantitative approach of phenomena occurring in UL‐94 test setting up selected instrumentation was developed in this work. The instrumentation permits to measure the weight of droplets, the weight loss of the sample as well as the temperature gradients during the fire test. Three flame ...

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Aluminium‐ and gallium‐doped homoepitaxial ZnO thin films: Strain‐engineering and electrical performance

17.04.2015 | Michael Lorenz, Tobias Weiss, Florian Schmidt, Holger von Wenckstern, Marius Grundmann, physica status solidi (a), 2015

Abstract Aluminium‐ and gallium‐doped ZnO thin films with nominal source target compositions of and were grown homoepitaxially and in‐plane lattice matched on c‐plane ZnO single crystalline substrates. In dependence on dopant concentration and oxygen partial pressure during growth we ...

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Combinatorial synthesis and high‐throughput characterization of the thin film materials system Co–Mn–Ge: Composition, structure, and magnetic properties

17.04.2015 | Steffen Salomon, Sven Hamann, Peer Decker, Alan Savan, Louisa Meshi, Alfred Ludwig, physica status solidi (a), 2015

Co–Mn–Ge is a system of interest for magnetocaloric applications as a solid state magnetic refrigerant. A thin film materials library covering a large fraction of the Co–Mn–Ge ternary composition space was fabricated by sputter deposition. After deposition, it was annealed at 600 °C for 3 h and ...

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Controllable thermal expansion of large magnitude in chiral negative Poisson's ratio lattices

17.04.2015 | Chan Soo Ha, Eric Hestekin, Jianheng Li, Michael E. Plesha, Roderic S. Lakes, physica status solidi (b), 2015

Abstract Lattices of controlled thermal expansion are presented based on planar chiral lattice structure with Poisson's ratio approaching . Thermal expansion values can be arbitrarily large positive or negative. A lattice was fabricated from bimetallic strips and the properties analyzed and ...

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