نتایج جستجو برای: ambient atmosphere

تعداد نتایج: 103116  

Journal: :Chemical communications 2015
Hidetoshi Ohta Kentaro Yamamoto Minoru Hayashi Go Hamasaka Yasuhiro Uozumi Yutaka Watanabe

The hydrodeoxygenation of various phenols to form cyclohexanes was achieved at 110 °C under an H2 atmosphere at ambient pressure using a Pt/H-ZSM-5 catalyst and octane as the solvent.

2017
S. Virtanen F. Saiz N. Quirke

In this paper, we report on the time dependent DCconductivity response at constant electric field of unfilled low density polyethylene (LDPE) and its composites containing untreated and octylsilane treated silica in ambient and dry atmospheres. The conductivity of both composites decrease with time under dry conditions and increase with time in ambient atmosphere. The dielectric response of dry...

Journal: :Science and technology of advanced materials 2008
Manisha Kundu Tsuyoshi Hasegawa Kazuya Terabe Kazuhiro Yamamoto Masakazu Aono

We examined the structural properties of copper sulfide films as a function of the sulfurization time of 70-nm-thick Cu films. Copper sulfide films with various phases such as mixed metallic Cu-chalcocite, chalcocite, roxbyite, and covellite phases were formed with increasing sulfurization time. To evaluate the structural stability of various films, all the films were exposed to the ambient atm...

Journal: :Nanoscale 2016
A Politano G Chiarello R Samnakay G Liu B Gürbulak S Duman A A Balandin D W Boukhvalov

We demonstrate that, in contrast to most two-dimensional materials, ultrathin flakes of InSe are stable under ambient conditions. Despite their ambient stability, InSe-based nanodevices show an environmental p-type doping, suppressed by capping InSe with hexagonal boron nitride. By means of transport experiments, density functional theory and vibrational spectroscopy, we attribute the p-type do...

2009
M. M. Haney

[1] We show that microbaroms, continuous infrasound fluctuations resulting from the interaction of the ocean with the atmosphere, have long-range correlation properties that make it possible to estimate the impulse response between two microphones from passive recordings. The processing is analogous to methods employed in the emerging field of ambient noise seismology, where the random noise so...

2016
Qidong Tai Peng You Hongqian Sang Zhike Liu Chenglong Hu Helen L. W. Chan Feng Yan

Poor stability of organic-inorganic halide perovskite materials in humid condition has hindered the success of perovskite solar cells in real applications since controlled atmosphere is required for device fabrication and operation, and there is a lack of effective solutions to this problem until now. Here we report the use of lead (II) thiocyanate (Pb(SCN)2) precursor in preparing perovskite s...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Axel Metzger Bart Verheggen Josef Dommen Jonathan Duplissy Andre S H Prevot Ernest Weingartner Ilona Riipinen Markku Kulmala Dominick V Spracklen Kenneth S Carslaw Urs Baltensperger

New particle formation in the atmosphere is an important parameter in governing the radiative forcing of atmospheric aerosols. However, detailed nucleation mechanisms remain ambiguous, as laboratory data have so far not been successful in explaining atmospheric nucleation. We investigated the formation of new particles in a smog chamber simulating the photochemical formation of H(2)SO(4) and or...

2017
Igor Ozerov Madjid Arab Viatcheslav Safarov Wladimir Marine Suzanne Giorgio Marc Sentis L. Nanai I. Ozerov M. Arab V. I. Safarov W. Marine S. Giorgio M. Sentis

Pulsed ArF laser annealing in air and in hydrogen atmosphere improves the optical properties of ZnO nanostructured films. Independently on the ambient atmosphere, laser annealing produces two major effects on the photoluminescence (PL) spectra: first, the efficiency of the exciton PL increases due to decrease of the number of non-radiative recombination centers; second, the intensity of the def...

2016
Yury Gorbanev Robert Soriano Deborah O'Connell Victor Chechik

Non-thermal atmospheric pressure ('cold') plasmas have received increased attention in recent years due to their significant biomedical potential. The reactions of cold plasma with the surrounding atmosphere yield a variety of reactive species, which can define its effectiveness. While efficient development of cold plasma therapy requires kinetic models, model benchmarking needs empirical data....

Journal: :The journal of physical chemistry. B 2006
Ruiming Ren Angel L Ortiz Tippawan Markmaitree William Osborn Leon L Shaw

The oxidation behaviors of LiH under a high purity argon atmosphere, an argon atmosphere with some O2 and H2O impurities, and ambient air at both room and high temperatures, are investigated using a variety of analytical instruments including X-ray diffractometry, thermogravimetry, mass spectrometry, scanning electron microscopy, and specific surface area analysis. The oxidation behaviors of th...

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