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Magnetic excitations in the spinel compound Lix[Mn1.96Li0.04]O4 (x=0.2,0.6,0.8,1.0): How a classical system can mimic quantum critical scaling
(American Physical Society, 2010)
We present neutron-scattering results on the magnetic excitations in the spinel compounds Lix Mn1.96Li0.04 O4 x=0.2, 0.6, 0.8, 1.0 . We show that the dominant excitations below T 70 K are determined by Mn ions located in ...
Structure and phase transitions of monolayers of intermediate-length n-alkanes on graphite studied by neutron diffraction and molecular dynamics simulation
(American Institute of Physics, 2009)
We present evidence from neutron diffraction measurements and molecular dynamics (MD) simulations of three different monolayer phases of the intermediate-length alkanes tetracosane (n-C24H50 denoted as C24) and dotriacontane ...
Nanoscale observation of delayering in alkane films
(Institute of Physics, 2007)
Tapping-mode Atomic Force Microscopy and synchrotron X-ray scattering measurements on dotriacontane (n-C32H66 or C32) films adsorbed on SiO2-coated Si(100) wafers reveal a narrow temperature range near the bulk C32 melting ...
Structure and melting of submonolayer ethane films on graphite
(American Physical Society, 1979)
Elastic neutron diffraction has been used to study the structure and melting of submonolayer ethane films physisorbed on exfoliated graphite. Analysis of the relative intensity of seven Bragg reflections of the film yields ...
The search for quantum critical scaling in a classical system
(American Institute of Physics, 2009)
Order-disorder phase transitions in magnetic metals that occur at zero temperature have been studied in great detail. Theorists have advanced scenarios for these quantum critical systems in which the unusual response can ...
AC susceptibility of the quantum critical point mimicking series Lix[Mn1.96Li0.04]O4 (x = 0.0,0.1,0.2,0.35,0.5,0.6,0.8,1.0)
(American Institute of Physics, 2010)
The present work elucidates the series of magnetic phase transitions present in the series of spinel compounds Lix Mn1.96Li0.04 O4 x=0.0, 0.1, 0.2, 0.35, 0.5, 0.6, 0.8, 1.0 . These systems display dynamical scaling originating ...
Magnetic ordering in the spinel compound Li[Mn2-xLix]O4(x=0,0.04)
(American Institute of Physics, 2009)
The two B-site ions Mn3+ and Mn4+ in the stoichiometric spinel structure LiMn2O4 form a complex, columnar ordered pattern below the charge-ordering transition at room temperature. On further cooling to below 66 K, the ...
Intramolecular and lattice melting in n-alkane monolayers : an analog of melting in lipid bilayers
(American Physical Society, 1999)
Molecular dynamics (MD) simulations and neutron diffraction experiments have been performed on n-dotriacontane ( n-C32D66) monolayers adsorbed on a graphite basal- plane surface. The diffraction experiments show little ...
Quasielastic neutron scattering and molecular dynamics simulation studies of the melting transition in butane and hexane monolayers adsorbed on graphite
(American Institute of Physics, 1997)
Quasielastic neutron scattering experiments and molecular dynamics (MD) simulations have been used to investigate molecular diffusive motion near the melting transition of monolayers of flexible rod-shaped molecules. The ...
Comparative study of normal and branched alkane monolayer films adsorbed on a solid surface. II. Dynamics
(American Institute of Physics, 2007)
The dynamics of monolayer films of the n-alkane tetracosane (n-C24H52) and the branched alkane squalane (C30H62) adsorbed on graphite have been studied by quasielastic and inelastic neutron scattering and molecular dynamics ...
Comparative study of normal and branched alkane monolayer films adsorbed on a solid surface. I. Structure
(American Institute of Physics, 2007)
The structure of a monolayer film of the branched alkane squalane (C30H62) adsorbed on graphite has been studied by neutron diffraction and molecular dynamics (MD) simulations and compared with a similar study of the ...
Structure and growth of butane films adsorbed on graphite
(American Physical Society, 1994)
The structure of deuterated n-butane [CD3(CD2)2CD3] adsorbed on the (0001) surfaces of an exfoliated graphite substrate has been investigated by elastic neutron diffraction. The aim of this study was to elucidate the effect ...
Application of empirical interatomic potentials to the calculation of the structure and dynamics of paraffin molecules adsorbed on graphite
(American Physical Society, 1979)
The adsorption of a single molecule of ethane, propane, and butane on a basal-plane surface of graphite is investigated using empirically derived carbon-hydrogen and carbon-carbon potentials. The principal motivation for ...
Solvent effects on the monolayer structure of long n-alkane molecules adsorbed on graphite
(American Physical Society, 1995)
Neutron diffraction patterns of dotriacontane ( n-C32D66) monolayers adsorbed on an exfoliated graphite substrate from a heptane ( n-C7D16) solution reveal striking differences in the molecular orientation, lattice constant, ...
Polymorphisms in Nucleotide Excision Repair Genes, Arsenic Exposure, and Non-Melanoma Skin Cancer in New Hampshire
(Environmental Health Perspectives, 2007)
Arsenic exposure may alter the efficiency of DNA repair. UV damage is specifically repaired by nucleotide excision repair (NER), and common genetic variants in NER may increase risk for non-melanoma skin cancer (NMSC). We ...
Intramolecular diffusive motion in alkane monolayers studied by high-resolution Quasielastic Neutron scattering and molecular dynamics simulations
(American Physical Society, 2004)
Molecular dynamics simulations of a tetracosane (n-C24H50) monolayer adsorbed on a graphite basal-plane surface show that there are diffusive motions associated with the creation and annihilation of gauche defects occurring ...
Atomic force microscopy measurements of topography and friction on dotriacontane films adsorbed on a SiO2 surface
(American Institute of Physics, 2005)
We report comprehensive atomic force microscopy (AFM) measurements at room temperature of the nanoscale topography and lateral friction on the surface of thin solid films of an intermediate-length normal alkane, dotriacontane ...
Studies of the structure and growth mode of dotriacontane films by synchrotron x-ray scattering and molecular dynamics simulations
(Institute of Physics, 2004)
We report on synchrotron x-ray scattering experiments and molecular dynamics simulations of the structure and growth mode of dotriacontane (n-C32H66 or C32) films adsorbed on Ag(111) and SiO2-coated Si(100) substrates. On ...
High-resolution ellipsometric study of an n-alkane film, dotriacontane, adsorbed on a SiO2 surface
(American Institute of Physics, 2002)
Using high-resolution ellipsometry and stray light intensity measurements, we have investigated during successive heating-cooling cycles the optical thickness and surface roughness of thin dotriacontane (n-C32H66) films ...
Crystalline-to-plastic phase transitions in molecularly thin n-dotriacontane films adsorbed on solid surfaces
(American Institute of Physics, 2009)
Crystalline-to-rotator phase transitions have been widely studied in bulk hydrocarbons, in particular in normal alkanes. But few studies of these transitions deal with molecularly thin films of pure n-alkanes on solid ...