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42.694 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 ...

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Rapid and convenient synthesis of stable silver nanoparticles with kiwi juice and its novel application for detecting protease K

17.12.2014 | Bin Bin Chen; Hai Liu; Cheng Zhi Huang; Jian Ling; Jian Wang, New Journal of Chemistry, 2014

In this work, kiwi juice functioned as the reducing and capping reagent to obtain stable silver nanoparticles (AgNPs), which was very effective and inexpensive. Importantly, it could be finished within 2 min at room temperature, making the synthesis much faster and easier. Compared with the most ...

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Synergism between polyurethane and polydopamine in the synthesis of Ni-Fe alloy monoliths

17.12.2014 | Thangavel Nareshkumar; Santhana Sivabalan; Naveen Chandrasekaran; Phani KLN, Chemical Communication, 2014

Herein, we report the first synthesis of light-weight macroporous 3-D alloy monolith of Ni-Fe/C using synergism between polydopamine (pDA) and polyurethane (pU); in situ formed polyurethane (pU) enables efficient mixing of pDA (carbon source) and Ni-FeOx resulting in Ni-Fe alloy monoliths at a ...

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Fluorine magic: one new organofluorine linker leads to three new metal–organic frameworks

17.12.2014 | K. Peikert; F. Hoffmann; M. Fröba, CrystEngComm, 2014

We present 2-fluoro-1,3,5-benzene-tricarboxylic acid (Fbtc) as new linker for metal–organic frameworks. Interestingly, even slight variations of the synthesis conditions such as temperature or the molar ratio of metal to linker lead to three new MOFs, which we call UHM-31, UHM-32 and UHM-33. ...

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Surfactant-Free Synthesis of SrTiO3 Hierarchical Structures in an Ethanol/Water Mixed Solvent at Room Temperature

17.12.2014 | Qingsong Wu; Jianwei Liu; Shaofeng Chen; Haiwei Liang; Shu-Hong Yu, CrystEngComm, 2014

Perovskites are a family of important functional materials with excellent ferroelectric, dielectric, pyroelectric, piezoelectric, and electro-optic properties and potential for novel applications. The synthesis methodology for perovskites usually involves harsh conditions. Here, we report a ...

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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 ...

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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 ...

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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 ...

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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 ...

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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 ...

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