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39.971 Aktuelle Fachpublikationen zum Thema temperature

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Correlation between stoichiometry and surface structure of the polar MgAl2O4(100) surface as a function of annealing temperature

27.02.2015 | Thomas N. Jensen; Morten K. Rasmussen; Jan Knudsen; Alina Vlad; Sergey Volkov; Edvin Lundgren; Andreas Stierle; Jepp ..., Physical Chemistry Chemical Physics, 2015

The correlation between surface structure, stoichiometry and atomic occupancy of the polar MgAl2O4(100) surface has been studied with an interplay of noncontact atomic force microscopy, X-ray photoelectron spectroscopy and surface X-ray diffraction under ultrahigh vacuum conditions. The Al/Mg ...

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A self-assembled, [small pi]-stacked complex as a finely-tunable magnetic aligner for biomolecular NMR applications

27.02.2015 | Sota Sato; Ryosuke Takeuchi; Maho Yagi-Utsumi; Takumi Yamaguchi; Yoshiki Yamaguchi; Koichi Kato; Makoto Fujita, Chemical Communication, 2015

The number of molecules constituting 1D intermolecular aggregates of the π-stacked self-assembled complex was controlled by altering the concentration and temperature. Enhanced magnetic orientation was observed for the aggregates with larger aggregation numbers. It was demonstrated that the ...

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Simultaneous strain and temperature sensing using a slightly tapered optical fiber with an inner cavity

27.02.2015 | H. F. Chen; D. N. Wang; Y. Wang, Analyst, 2015

An ultracompact optical fiber mode interferometer capable of performing simultaneous strain and temperature sensing is demonstrated. The device is fabricated by using femtosecond laser micromachining together with fusion splicing techniques and followed by a tapering process. The transmission ...

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Surface controlled reduction kinetics of nominally undoped polycrystalline CeO2

27.02.2015 | Nicole Knoblauch; Lars Dörrer; Peter Fielitz; Martin Schmücker; Günter Borchardt, Physical Chemistry Chemical Physics, 2015

Ceria is an interesting material for high temperature redox applications like solar-thermal splitting of CO2 and H2O. Technical implementation and reactor design for solar-thermal redox-based fuel generation requires reliable data for the chemical surface exchange coefficient and the chemical ...

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Novel Photoluminescence Properties and Enhanced Photocatalytic Activities for V2O5-Loaded ZnO Nanorods

27.02.2015 | Haihong Yin; Ke Yu; Jingjing Hu; Changqing Song; Bangjun Guo; Zhiliang Wang; Ziqiang Zhu, Dalton Transactions, 2015

Three different kinds of V2O5/ZnO heteronanorods were synthesized through a CVD process and oxidized in air at temperatures of 350, 420 and 500 °C. These 1D heteronanorods are formed by ZnO nanorods (NRs) coated with V2O5 nanoparticles (NPs). With the rise of oxidization temperature, the coated ...

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Dielectric study of insulin-loaded reverse hexagonal (HII) liquid crystals

27.02.2015 | Tehila Mishraki; Paul Ben Ishai; Abraham Aserin; Yuri Feldman; Nissim Garti, Physical Chemistry Chemical Physics, 2015

The dielectric behavior of insulin-loaded HII mesophase (containing GMO/TAG/water/glycerol/insulin) was studied using two empty reference systems (GMO/TAG/water and GMO/TAG/water/glycerol) at a frequency range of 10-2–107 Hz, and temperature range of 290–333 K. Three clearly defined relaxation ...

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Crystal and magnetic structures of the brownmillerite Ca2Cr2O5

27.02.2015 | Angel M. Arevalo-Lopez; J. Paul Attfield, Dalton Transactions, 2015

Powder neutron diffraction and magnetic susceptibility measurements at 10–300 K have been used to determine the crystal and magnetic structures of brownmillerite type Ca2Cr2O5, which was obtained by reduction of the high pressure phase CaCrO3 through hard–soft chemistry. The ambient temperature ...

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Indium Triflate-Catalyzed Stereoselective Tandem Intramolecular Conjugate Addition of Secondary Amines to [small alpha],[small beta]-Bisenones

27.02.2015 | Bodakuntla Thirupathaiah; SungYong Seo, Chemical Communication, 2015

We report an indium triflate-catalyzed stereoselective intramolecular tandem conjugate addition of secondary amines to α,β-bisenones to afford a 1,2,3-trisubstituted six-membered ring bearing diketone substituents in good to excellent yields at room temperature. Various kinds of α,β-bisenones and ...

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Structural and dielectric studies of the phase behaviour of the topological ferroelectric La1−xNdxTaO4

27.02.2015 | Keith J. Cordrey; Magda Stanczyk; Charlotte A. L. Dixon; Kevin S. Knight; Jonathan Gardner; Finlay D. Morrison; Phil ..., Dalton Transactions, 2015

The layered perovskite LaTaO4 has been prepared in its polar orthorhombic polymorphic form at ambient temperature. Although no structural phase transition is observed in the temperature interval 25° C < T < 500 °C, a very large axial thermal contraction effect is seen, which can be ascribed to an ...

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Thermodynamics of Cellulose Dissolution in an Imidazolium Acetate Ionic Liquid

26.02.2015 | Jean-Michel Andanson; Agilio A.H. Padua; Margarida Costa Gomes, Chemical Communication, 2015

The heat of dissolution of cellulose in one imidazolium acetate ionic liquid was determined experimentally. The value of −132 ± 8 J/g indicates that the dissolution is exothermal thus confirming energetically favourable cellulose-ionic liquid interactions but indicating that an increase in ...

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