Results 251 to 260 of about 1,845,174 (287)

Investigating ultraviolet photoelectron spectroscopy of ice

Solid State Communications, 1979
Abstract Photoelectron energy distribution curves (EDCs) from ice excited by HeI (21.2 eV) and NeI (16.8 eV) radiation are presented. The strict connection between valence density of states and EDCs forces to rule out the previous suggestion by Shibaguchi et al. that conduction band density of states is of paramount importance in determining the EDCs
I. Abbati, L. Braicovich, B. De Michelis
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Spectroscopy and photochemistry of organic compounds in ice

2020
Natural ice and snow are always contaminated by diverse inorganic and organic species, many of which can undergo photochemical transformations under solar radiation or react with photochemically produced reactive species. The courses of these reactions are often phase-specific and strongly depend on many factors, such as phase properties of a frozen ...
Petr Klán, Dominik Heger
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2D IR Spectroscopy of Ice Ih

Research in Optical Sciences, 2012
We present experimental 2D IR spectra of the OH stretch of ice Ih, for both the isotope dilute (5% HOD in D2O) and neat (100% H2O) cases, complemented by simulations using the Lippincott-Schroeder model.
Fivos Perakis, Peter Hamm
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The premelting of ice studied with photoelectron spectroscopy

Journal of Physics: Condensed Matter, 2002
We address the century-old puzzle of the existence of a liquid-like layer at the ice surface near its melting point with new photoelectron spectroscopic tools using synchrotron radiation. Near-edge x-ray absorption shows that a liquid-like film exists at temperatures as low as -20 °C. Near 0 °C this film is about 20 A thick, i.e., six bilayers.
Bluhm, H., Ogletree, D., Fadley, C., Hussain, Z., Salmeron, M.   +4 more
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Laboratory Studies of Astronomical Ices: Reaction Chemistry and Spectroscopy

Accounts of Chemical Research, 2020
ConspectusScientists have had evidence for molecules in both comets and interstellar space since the 19th and early 20th centuries. Since then, extraterrestrial molecules ranging from simple diatomics to C70 to amino acids have been detected and identified through remote spectroscopy, spacecraft, and sample return missions. These achievements have been
Christopher K. Materese, Perry A. Gerakines, Reggie L. Hudson   +2 more
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Raman spectroscopy of high salinity brines and ices

Icarus, 2022
Abstract Raman spectroscopy is an ideal tool to analyze the geochemistry and mineralogy of heterogenous mixtures of solids, liquid, and gases in situ, while maintaining planetary protection protocols. Here we characterize saturated CaCl2, MgCl2, MgSO4, Na2SO4, NaCl, and NaClO4 brines, as well as ultrapure water, and mixed MgSO4-NaCl, MgSO4-NaClO4 ...
Daniel P. Mason, Megan E. Elwood Madden
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Spectroscopy and Processing of Interstellar Ice Analogs

AIP Conference Proceedings, 2006
Recent results from the Raymond and Beverly Sackler Laboratory for Astrophysics on spectroscopy and processing of interstellar ice analogues are summarized. This includes thermal desorption studies of pure, layered and mixed CO, N2 and O2 ices, and infrared spectroscopy and heating of CO‐CO2, CO‐H2O, CO‐HCOOH, CO‐CH4 and CO‐CH3OH layered and mixed ices.
E. F. van Dishoeck, K. Acharyya, A. Al-Halabi, S. Andersson, S. E. Bisschop, F. A. van Broekhuizen, H. J. Fraser, G. Fuchs, G. J. Kroes, K. I. Öberg, S. Schlemmer, H. Linnartz   +11 more
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Infrared Spectroscopy of Interstellar Ices

1996
The development of our understanding of astrophysical ices depends on the interpretation of relevant astronomical observations with the aid of laboratory data for interstellar ice analogues. This paper aims to give an overview of current research, with emphasis on recent results appearing since my previous review of the topic (Whittet, 1993).
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Water–ice phase transition probed by Raman spectroscopy

Journal of Raman Spectroscopy, 2011
AbstractRaman spectroscopy was used to study the liquid–solid water phase transition. Special attention was devoted to the OHstretching band of the Raman spectrum, which shows monotonous changes in the temperature range between 10 and − 15 °C. The interpretation of this spectral change, as well as a careful analysis of its integrated scattered ...
Durickovic, I., Claverie, R., Bourson, P., Marchetti, Mario, Chassot, J.M., Fontana, M.D.   +5 more
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Vibrational Spectroscopy and Modeling of the Surface and Subsurface of Ice and of Ice−Adsorbate Interactions

The Journal of Physical Chemistry B, 1997
FT-IR spectroscopic results in conjunction with simulations show that ice nanocrystals, formed at 70 K and annealed at 140 K, consist of a crystalline core, a highly irregular (though relatively smooth) crystalline surface, and a slightly distorted subsurface region connecting the surface and bulklike interior ice.
J. P. Devlin, V. Buch
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