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1.700 Aktuelle Fachpublikationen zum Thema temperature

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Soft-chemical synthesis, characterization and humidity sensing behavior of WO3/TiO2 nanopowders

16.09.2013 | Author(s): S.M. Zanetti , K.O. Rocha , J.A.J. Rodrigues , E. Longo, Sensors and Actuators B: Chemical, 2013

Publication date: January 2014 Source:Sensors and Actuators B: Chemical, Volume 190 Author(s): S.M. Zanetti , K.O. Rocha , J.A.J. Rodrigues , E. Longo Tungsten oxide/titania (WO3/TiO2) nanopowders were synthesized by the polymeric precursor method which varied the WO3 content between 0 ...

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Vacuum Ultraviolet Spectroscopy and Photochemistry of Zinc Dihydride and Related Molecules in Low-Temperature Matrices

13.09.2013 | Chris Henchy; Una Kilmartin; John G. McCaffrey, Journal of Physical Chemistry A, 2013

Optical absorption spectra of thin film samples, formed by the codeposition of zinc vapor with D2 and CH4, have been recorded with synchrotron radiation. With sufficiently low metal vapor flux, samples deposited at 4 K were found to consist exclusively of isolated zinc atoms for both solids. The ...

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Electroless Deposition of Platinum Nanoparticles in Room-Temperature Ionic Liquids

13.09.2013 | Da Zhang; Takeyoshi Okajima; Dalin Lu; Takeo Ohsaka, Langmuir, 2013

The electroless deposition of Pt nanoparticles (Pt-NPs) could be carried out by dissolving potassium tetrachloroplatinate(II) (K2[PtCl4]) in 1-ethyl-3-methylimidazolium (EMI+) room-temperature ionic liquids (RTILs) containing bis(trifluoromethylsulfonyl) imide (NTf2–) or tetrafluoroborate (BF4–) ...

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Crystal Structure, Phase Transitions, and Magnetic Properties of Iridium Perovskites Sr2MIrO6 (M = Ni, Zn)

12.09.2013 | P. Kayser; M. J. Martínez-Lope; J. A. Alonso; M. Retuerto; M. Croft; A. Ignatov; M. T. Fernández-Díaz, Inorganic Chemistry, 2013

Double perovskites containing Ir6+/Ir5+ with formula Sr2MIrO6 (M = Ni, Zn) have been synthesized under high oxygen pressure conditions. Their crystal structures have been studied by X-ray and neutron powder diffraction at room temperature (RT) and 2 K. At RT, these oxides crystallize in the ...

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Measurements of sputtered neutrals and ions and investigation of their roles on the plasma properties during rf magnetron sputtering of Zn and ZnO targets

12.09.2013 | L. Maaloul and L. Stafford, Journal of Vacuum Science & Technology B, 2013

Langmuir probe and optical absorption spectroscopy measurements were used to determine the line-integrated electron density, electron temperature, and number density of Ar atoms in metastable 3P2 and 3P0 levels in a 5 mTorr, rf magnetron sputtering plasmas used for the deposition of ZnO-based ...

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Size Controlled Synthesis of Silicon Nanocrystals Using Cationic Surfactant Templates

11.09.2013 | Keith Linehan, Hugh Doyle, Small, 2013

Alkyl‐terminated silicon nanocrystals (Si NCs) are synthesized at room temperature by hydride reduction of silicon tetrachloride (SiCl4) within inverse micelles. Highly monodisperse Si nanocrystals with average diameters ranging from 2 to 6 nm are produced by variation of the cationic quaternary ...

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Metal–organic frameworks: a novel SERS substrate

11.09.2013 | Tsung‐Han Yu, Chin‐Hsian Ho, Cheng‐You Wu, Ching‐Hsuan Chien, Chia‐Her Lin, Szetsen Lee, Journal of Raman Spectroscopy, 2013

We report the direct observation of surface‐enhanced Raman scattering (SERS) effect using metal–organic frameworks (MOFs) as substrates. Without the aid of any metal colloids or enhancing agents, the SERS signals of methyl orange (MO) adsorbed in MOFs were observed and even remained active if ...

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Analysis of the temperature-dependence of P+HA− charge recombination in the Rhodobacter sphaeroides reaction center suggests nanosecond temperature-independent protein relaxation

11.09.2013 | Krzysztof Gibasiewicz; Maria Pajzderska; Andrzej Dobek; Jerzy Karolczak; Gotard Burdziński; Klaus Brettel; Michael R ..., Physical Chemistry Chemical Physics, 2013

The temperature dependence of charge recombination of the pair P+HA− in isolated reaction centers from the purple bacterium Rhodobacter sphaeroides with prereduced quinone QA was studied by sub-nanosecond to microsecond time-scale transient absorption. Overall, the kinetics slowed down ...

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Keys for the Existence of Stable Dimers of Bis-tetrathiafulvalene (bis-TTF)-Functionalized Molecular Clips Presenting [TTF]•+···[TTF]•+ Long, Multicenter Bonds at Room Temperature

10.09.2013 | Maria Fumanal; Marçal Capdevila-Cortada; Joel S. Miller; Juan J. Novoa, Journal of the American Chemical Society, 2013

A systematic theoretical and computational investigation is performed to determine the keys governing the existence, in acetonitrile solutions, of dimers of bis-tetrathiafulvalene (bis-TTF)-functionalized diphenylglycoluril molecular clips (clip2n+) that are stable at room temperature for n ≤ 4. ...

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Sub-THz Spectroscopic Characterization of Vibrational Modes in Artificially Designed DNA Monocrystal

09.09.2013 | Author(s): Igor Sizov , Masudur Rahman , Boris Gelmont , Michael L. Norton , Tatiana Globus, Chemical Physics, 2013

Publication date: Available online 3 September 2013 Source:Chemical Physics Author(s): Igor Sizov , Masudur Rahman , Boris Gelmont , Michael L. Norton , Tatiana Globus Sub-terahertz (sub-THz) vibrational spectroscopy is a new spectroscopic branch for characterizing biological ...

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