نتایج جستجو برای: temperature dependence

تعداد نتایج: 586265  

Journal: :Geochemistry, Geophysics, Geosystems 2004

Journal: :Physical review letters 2005
Roberto D'Agosta Giovanni Vignale Roberto Raimondi

Recent experiments have studied the tunneling current between the edges of a fractional quantum Hall liquid as a function of temperature and voltage. The results of the experiment are puzzling because at "high" temperature (600-900 mK) the behavior of the tunneling conductance is consistent with the theory of tunneling between chiral Luttinger liquids, but at low temperature it strongly deviate...

2017
Jakob Zscheischler Sonia I Seneviratne

Compound climate extremes are receiving increasing attention because of their disproportionate impacts on humans and ecosystems. However, risks assessments generally focus on univariate statistics. We analyze the co-occurrence of hot and dry summers and show that these are correlated, inducing a much higher frequency of concurrent hot and dry summers than what would be assumed from the independ...

2010
Zhi-Min Liao Chong Hou Li-Ping Liu Da-Peng Yu

Influence of temperature on photoconductivity of single Se nanowires has been studied. Time response of photocurrent at both room temperature and low temperature suggests that the trap states play an important role in the photoelectrical process. Further investigations about light intensity dependence on photocurrent at different temperatures reveal that the trap states significantly affect the...

Journal: :Physical chemistry chemical physics : PCCP 2011
Daniel Matsiev Zhisheng Li Russell Cooper Igor Rahinov Christof Bartels Daniel J Auerbach Alec M Wodtke

Here we extend a recently introduced state-to-state kinetic model describing single- and multi-quantum vibrational excitation of molecular beams of NO scattering from a Au(111) metal surface. We derive an analytical expression for the rate of electronically non-adiabatic vibrational energy transfer, which is then employed in the analysis of the temperature dependence of the kinetics of direct o...

2011
M. Saitou S. Teruya S. M. Asadul Hossain

We have investigated the formation of a platinum thin film from a simple solution of dihydrogen hexachloroplatinate in a low temperature range of 283 to 295 K by a pulse current technique. Despite the low temperature, the platinum thin film observed with a confocal laser scanning microscope does not comprise particle aggregates but dense layer with a small surface roughness that tends to satura...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
D Kraemer M L Cowan A Paarmann N Huse E T J Nibbering T Elsaesser R J Dwayne Miller

Two-dimensional infrared photon-echo measurements of the OH stretching vibration in liquid H2O are performed at various temperatures. Spectral diffusion and resonant energy transfer occur on a time scale much shorter than the average hydrogen bond lifetime of approximately 1 ps. Room temperature measurements show a loss of frequency and, thus, structural correlations on a 50-fs time scale. Weak...

Journal: :Nano letters 2013
Youfan Hu Benjamin D B Klein Yuanjie Su Simiao Niu Ying Liu Zhong Lin Wang

A comprehensive investigation was carried out on n-type ZnO nanowires for studying the temperature dependence of the piezotronic effect from 77 to 300 K. In general, lowering the temperature results in a largely enhanced piezotronic effect. The experimental results show that the behaviors can be divided into three groups depending on the carrier doping level or conductivity of the ZnO nanowires...

Journal: :Physical review letters 2016
Hirokazu Ueta Naoki Watanabe Tetsuya Hama Akira Kouchi

The surface temperature dependence of the ortho-to-para conversion of H_{2} on amorphous solid water is first reported. A combination of photostimulated desorption and resonance-enhanced multiphoton ionization techniques allowed us to sensitively probe the conversion on the surface of amorphous solid water at temperatures of 9.2-16 K. Within a narrow temperature window of 8 K, the conversion ti...

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