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39.337 Aktuelle Fachpublikationen zum Thema temperature

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Calculation of the chemical potential and the activity coefficient of two layers of CO2 adsorbed on a graphite surface

17.12.2014 | T.T. Trinh; D. Bedeaux; J.-M. Simon; S. Kjelstrup, Physical Chemistry Chemical Physics, 2014

We study the adsorption of carbon dioxide at a graphite surface using the new Small System Method, and find that for the temperature range between 300 K and 550 K most relevant for CO2 separation; adsorption takes place in two distinct thermodynamic layers defined according to Gibbs. We calculate ...


A simple SVS method for obtaining large-scale WO3 nanowire cold cathode emitters at atmospheric pressure and low temperature

17.12.2014 | Zhuo Xu; Fei Liu; Daokun Chen; Tongyi Guo; Shunyu Jin; Shaozhi Deng; Ningsheng Xu; Jun Chen, CrystEngComm, 2014

Large-scale WO3 nanowire patterns have been successfully fabricated on a 3.5 inch glass substrate at atmospheric pressure by a simple no-catalyst method. The nanowires were observed to have a mean length of about 40 μm, and their aspect ratio reaches 200. The nanowires were proven to be single ...


An in situ spectroscopic study of the local structure of oxyfluoride melts: NMR insights into the speciation in molten LiF–LaF3–Li2O systems

17.12.2014 | Anne-Laure Rollet; Haruaki Matsuura; Catherine Bessada, Dalton Transactions, 2014

The local structure of molten LaF3–LiF–Li2O has been investigated by high temperature NMR spectroscopy. The 139La and 19F chemical shifts have been measured as a function of temperature and composition. The NMR spectra show that Li2O reacts completely with LaF3 to form a LaOF compound in the ...


Influence of imidazolium based green solvents on volume phase transition temperature of crosslinked poly(N-isopropylacrylamide-co-acrylic acid) hydrogel

16.12.2014 | Chi-Jung Chang; P. Madhusudhana Reddy; Shih-Rong Hsieh; Hsin-Chun Huang, Soft Matter, 2014

The volume phase transition temperature (VPTT) of crosslinked poly(N-isopropylacrylamide-co-acrylic acid) (PNIPAM-co-AA) hydrogel in water in the presence of five imidazolium based ionic liquids (ILs) was studied. The VPTT of PNIPAM-co-AA hydrogel can be modulated to different extents by the ...


Suppression of the Leidenfrost effect via low frequency vibrations

16.12.2014 | Boon T. Ng; Yew M. Hung; Ming K. Tan, Soft Matter, 2014

The ability to suppress the Leidenfrost effect is of significant importance in applications that require rapid and efficient cooling of surfaces with temperature higher than the Leidenfrost point TSL. The Leidenfrost effect will result in substantial reduction in cooling efficiency and hence ...


Negative Thermal Quenching of Photoluminescence in Annealed ZnO/Al2O3 Core/Shell Nanorods

16.12.2014 | Yukun Wu; Junwen Li; Huaiyi Ding; Zhiwei Gao; Yiming Wu; Nan Pan; Xiaoping Wang, Physical Chemistry Chemical Physics, 2014

ZnO/Al2O3 core/shell nanorods (NRs) have been fabricated through vapor phase condensation method and atomic layer deposition. It is found that the nanorod comprises a wurtzite single crystal ZnO core with the main axes along [0001] direction and an amorphous Al2O3 shell. The temperature-dependent ...


Development and field testing of a miniaturized sampling system for simultaneous sampling of vapours and droplets

16.12.2014 | Dietmar Breuer; George C. Dragan; Claudia Friedrich; Carsten Möhlmann; Ralf Zimmermann, Journal of Environmental Monitoring, 2014

The sampling of semi volatiles (SV) in workplaces may lead to different results as measurements may be affected by sampling bias. The new European Standard EN 13936 defines “semi-volatiles” as substances with vapour pressures in the range between 0.001 and 100 Pa at room temperature. EN 13936 ...


The first example of a zirconium-oxide based metal–organic framework constructed from monocarboxylate ligands

16.12.2014 | Weibin Liang; Ravichandar Babarao; Michael J. Murphy; Deanna M. D'Alessandro, Dalton Transactions, 2014

This work reports the first example of a Zr-based MOF which is exclusively constructed from the monocarboxylate ligand formate. Despite the low surface area, the new material exhibits an unexpectedly favourable affinity for carbon dioxide over nitrogen at room temperature.


A shock tube study of the branching ratios of propene + OH reaction

16.12.2014 | Jihad Badra; Fethi Khaled; Binod Raj Giri; Aamir Farooq, Physical Chemistry Chemical Physics, 2014

Absolute rate coefficients for the reaction of the OH radical with propene (C3H6) and five deuterated isotopes, propene-1-D1 (CDHCHCH3), propene-1,1-D2 (CD2CHCH3), propene-1,1,2-D3 (CD2CDCH3), propene-3,3,3-D3 (CH2CHCD3), and propene-D6 (C3D6), were measured behind reflected shock waves over the ...


Slow magnetic relaxation and photoluminescent properties of a highly coordinated erbium(III) complex with dibenzoylmethane and 2,2’-bipyridine

16.12.2014 | Pablo Martin-Ramos; Joana Teixeira Coutinho; Manuela Ramos Silva; Laura C J Pereira; FERNANDO LAHOZ; Pedro Silva; Vi ..., New Journal of Chemistry, 2014

A new Er(III) β-diketonate complex, tris(dibenzoylmethanate)mono(2,2´-bipyridine) erbium(III) or [Er(dbm)3(bipy)], has been synthesized and its structural, thermal, photophysical and low temperature magnetic properties have been characterized. In the new complex, Er(III) ions are coordinated by ...


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