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43.723 Aktuelle Fachpublikationen zum Thema temperature

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Flexible Thermoelectric Fabrics Based on Self-assembled Tellurium Nanorods with a Large Power Factor

01.03.2015 | Chaochao Dun; Corey Hewitt; Huihui Huang; David Montgomery; Junwei Xu; Dave Carroll, Physical Chemistry Chemical Physics, 2015

Highly-flexible thermoelectric fabrics were fabricated based on a layered structure, composed of a thin active layer of self-assembled tellurium nanorods and a substrate layer of polyvinylidene fluoride. The resulting thermoelectric fabrics show a high room temperature power factor of 45.8 ...

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DNA encapsulated chain and wire-like [small beta]-MnO2 organosol for oxidative polymerization of pyrrole to polypyrrole

01.03.2015 | Sivasankara Rao Ede; S Anantharaj; U Nithiyanantham; Subrata Kundu, Physical Chemistry Chemical Physics, 2015

DNA encapsulated chain and wire-like β-MnO2 organosol had been synthesized utilizing a two phase water-toluene extraction procedure at room temperature (RT). The β-MnO2 organosol was prepared by transferring KMnO4 and the DNA from aqueous solution separately to the organic (toluene) solvent by ...

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Host-sensitized luminescence in LaNbO4:Ln3+ (Ln3+ = Eu3+/Tb3+/Dy3+) with different emission colors

01.03.2015 | Kai Li; Yang Zhang; Xuejiao Li; Mengmeng Shang; Hongzhou Lian; Jun Lin, Physical Chemistry Chemical Physics, 2015

In this work, a series of Eu3+, Tb3+, and Dy3+ singly-doped and co-doped LaNbO4 (LNO) phosphors have been synthesized by a high-temperature solid-state reaction route. X-ray diffraction (XRD) along with Rietveld refinement, diffuse reflection spectra, photoluminescence (PL) and ...

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Unveiling the uncatalyzed reaction of alkynes with 1,2-dipoles for the room temperature synthesis of cyclobutenes

28.02.2015 | Benito Alcaide; Pedro Almendros; Israel Fernandez; Carlos Lázaro, Chemical Communication, 2015

2-(Pyridinium-1-yl)-1,1-bis(triflyl)ethanides have been used as 1,2-dipole precursors in a metal-free direct [2+2] cycloaddition reaction of alkynes. Starting from stable zwitterionic pyridinium salts, the 1,2-dipole 1,1-bis(trifluoromethylsulfonyl)ethene is generated in situ and immediately ...

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Catalytic hydrogen production from paraformaldehyde and water using an organoiridium complex

28.02.2015 | Tomoyoshi Suenobu; Yusuke Isaka; Satoshi Shibata; Shunichi Fukuzumi, Chemical Communication, 2015

Paraformaldehyde was decomposed using an organoiridium complex (1, [IrIII(Cp*)(4-(1H-pyrazol-1-yl-κN2)benzoic acid-κC3)(H2O)]2SO4) as a catalyst in water to produce H2 and CO2 in a 2 [ ] : [ ] 1 molar ratio at room temperature. The catalytic cycle is composed of the reduction of 1 by ...

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Physical State and Acidity of Inorganic Sulfate Can Regulate the Production of Secondary Organic Material from Isoprene Photooxidation Products

28.02.2015 | Mikinori Kuwata; Yingjun Liu; Karena McKinney; Scot Martin, Physical Chemistry Chemical Physics, 2015

The production of secondary organic material (SOM) by the reactive uptake of isoprene photooxidation products was investigated using partially to wholly neutralized sulfuric acid particles. The experiments were performed at a relative humidity (RH) of < 5% and a temperature of 20 °C. The extent X ...

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Abnormal Thermal Expansion Property in Cubic NaZn13-type La(Fe,Al)13 Compounds

28.02.2015 | Wen Li; Rongjin Huang; Wei Wang; Yuqiang Zhao; Shaopeng Li; Chuanjun Huang; Laifeng Li, Physical Chemistry Chemical Physics, 2015

The cubic NaZn13-type La(Fe,Al)13 compounds were synthesized, and their linear thermal expansion properties were investigated in the temperature range of 4.2-300K. It was found that these compounds perform abnormal thermal expansion behavior, i.e., pronounced negative thermal expansion (NTE) or ...

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BaCoO2.22 : the most oxygen-deficient certified cubic perovskite

28.02.2015 | Olivier Mentré; Mihaela IORGULESCU; Marielle Huvé; Houria Kabbour; Nicolas Renaut; Sylvie Daviero-Minaud; silviu Col ..., Dalton Transactions, 2015

The cubic BaCoO±2.2 was announced in the early 50’s as the final product of high temperature self-reduction within the BaCoO3-δ series. However apart from this report no clear characterization was provided up-to-date. Here we confirm after preparation of single crystal and powder samples that in ...

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Structural and dynamical anomalies of soft particles interacted with harmonic repulsions

28.02.2015 | Wenze Ouyang; Bin Sun; ZHIWEI SUN; Shenghua Xu, Physical Chemistry Chemical Physics, 2015

Molecular dynamics(MD) simulations are carried out to investigate the structural and dynamical anomalies in the core-softened fluid with harmonic repulsions. At sufficiently low temperature and densities, a general scaling relation between Rosenfeld's diffusivity DR and excess entropy Sex hold ...

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Negative thermal quenching of photoluminescence in annealed ZnO–Al2O3 core–shell nanorods

28.02.2015 | Yukun Wu; Junwen Li; Huaiyi Ding; Zhiwei Gao; Yiming Wu; Nan Pan; Xiaoping Wang, Physical Chemistry Chemical Physics, 2015

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

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