New Methods in Raman Spectroscopy – Combining Other Microscopes
Kenneth Williams, Robert Bennett, Alan Brooker, Richard Bormett, Tim Prusnick; New Methods in Raman Spectroscopy – Combining Other Microscopes, Microscopy
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Hard sphere fluids in random fiber networks
We investigate an annealed hard sphere fluid in contact with a rigid, random fiber network modeled by quenched, vanishingly thin hard needles. For this model a quenched-annealed density functional theory is presented that treats arbitrary spatially inhomogeneous situations, in particular anisotropic and spatially vary…
Determination of U-oxidation states in the brannerite structure by electron energy-loss (EELS), x-ray photoelectron (XPS) and diffuse reflectance (DRS) spectroscopies.
M Colella, Z Zhang, KS Finnie, Y Zhang, KL Smith, EJ Buck; Determination of U-oxidation states in the brannerite structure by electron energy-loss (EELS),
Diamond deposition on modified silicon substrates: Making diamond atomic force microscopy tips for nanofriction experiments
Fine-crystalline diamond particles are grown on standard Si atomic force microscopy tips, using hot filament-assisted chemical vapor deposition. To optimize the conditions for diamond deposition, first a series of experiments is carried out using silicon substrates covered by point-topped pyramids as obtained by wet c…
Improving Energy Resolution of EELS Spectra by Deconvolution using Maximum-Entropy and Richardson-Lucy Algorithms
Kazuo Ishizuka, Koji Kimoto, Yoshio Bando; Improving Energy Resolution of EELS Spectra by Deconvolution using Maximum-Entropy and Richardson-Lucy Algorithm
Synthesis of conducting poly[di‐heteroaromatics] from pyrrole, indole, and carbazole, and their mixed hydroxamates, and studies of their metal complexes
Abstract Compounds 1,1‐di‐( N ‐pyrrolyl)methane hydroxamic acid ( II ), 1,1‐di‐( N ‐indolyl)methane hydroxamic acid ( IV ), 1,1‐di‐( N ‐carbazolyl)methane hydroxamic acid ( VI ), 1‐( N ‐pyrrolyl)‐1‐( N ‐carbazolyl)methane hydroxamic acid ( VIII ), and 1‐( N ‐pyrrolyl)‐1‐( N ‐indolyl)‐methane hydroxamic acid ( X ) were…
Direct and specific heat study of magnetocaloric effect in La0.845Sr0.155MnO3
Magnetocaloric effect and specific heat of a La0.845Sr0.155MnO3 sample were measured over a temperature range of 4.2–300 K, to verify whether large entropy changes induced by magnetic field make possible the use of manganites for magnetic refrigeration and whether a magnetostrictive contribution to magnetocaloric effe…
Kinetic pathways of carbon nanotube nucleation from graphitic nanofragments
A detailed analysis of nanotube (NT) nucleation from graphitic nanofragments by thermal vibration is given, outlining the role of activation energy barriers which may be significantly decreased by the interaction with amorphous carbon, fullerene-like, and carbonized metal catalyst nanoparticles. This analysis predicts…
Computer simulations of a liquid crystalline dendrimer in liquid crystalline solvents
Molecular dynamics simulations have been carried out to study the structure of a model liquid crystalline dendrimer (LCDr) in solution. A simplified model is used for a third generation carbosilane LCDr in which united atom Lennard-Jones sites are used to represent all heavy atoms in the dendrimer with the exception o…
Magnetic resonance investigation of Mn2+ in ZnO nanocrystals
Electron paramagnetic resonance measurements were carried out to probe the structure of Mn2+ in ZnO nanocrystals with different surface conditions, modified by an annealing process. Changes in the spectra by the annealing treatment indicate the existence of three Mn2+ centers. The first is a sextet signal SI with g=2.…
Pr4Ge3S12: structure determination from high-resolution powder diffraction data
The structure of praseodymium germanium sulfide, Pr4Ge3S12, has been determined in the course of the determination of the amount of contamination of the title compound by the starting products. Its structure was assumed to be isostructural with the structure of La4Ge3S12. One Pr atom lies on a threefold axis.
Electrical and nonlinear optical properties of KTiOPO4 single crystals doped by Nb or Sb
Single crystals of K1−xTi1−xNbxOPO4 and K1−xTi1−xSbxOPO4 solid solutions are grown and their dielectric properties, electrical conductivity, and nonlinear optical properties are studied. Maximal content of these dopants x is found to be 0.11 for Nb and 0.23 for Sb. This doping leads to the creation of the additional p…
Fictive-temperature dependence of structural relaxation in silica glass
To clarify the factors that determine the structural relaxations in silica glass, the influence of fictive temperature on the relaxation process was investigated. It was found that the relaxations at different heat-treatment temperatures are enhanced with a rise in the fictive temperature. The structural relaxation is…
Is SEM Noise Gaussian?
Journal Article Is SEM Noise Gaussian? Get access M Satya Prasad, M Satya Prasad EM Facility, University of Tennessee, Knoxville, TN 37996-0810 Search for other works by this author on: Oxford Academic Google Scholar David C Joy David C Joy Oak Ridge National Laboratory, Oak Ridge, TN 37831-6064 Search for other works…
Highly Efficient Peptide Bond Formation to Functionalized Wells‐Dawson‐Type Polyoxotungstates
Die Einführung organischer Substituenten ist eine wichtige Voraussetzung für den biologischen Einsatz von Polyoxometallaten. Modelle hierfür sind die Organozinnderivate α1- und α2-[P2W17O61{Sn(CH2)2CO2H}]7− (siehe Bild), die mit Alkoholen, Aminen sowie C-geschützten Aminosäuren gekuppelt werden können.
Physical characteristics and infrared fluorescence properties of sol–gel derived Er3+–Yb3+ codoped TiO2
Er 3+ – Yb 3+ codoped TiO2 films were prepared on fused silica by sol–gel processes. The Yb3+ codoping effect on the physical characteristics and ∼1.54 μm photoluminescence (PL) properties of Er3+-doped TiO2 films was investigated. Maximum ∼1.54 μm PL intensity occurs in Er3+ (5 mol %)–Yb3+(30 mol %) codoped TiO2 samp…
Fabrication of Rare-Earth Biphthalocyanine Encapsulated by Carbon Nanotubes Using a Capillary Filling Method
Erbium biphthalocyanine (HErPc2) nanorods or nanowires were encapsulated in the cavities of MWCNTs simply by the capillary filling method. The length and the diameter of the nanowires can be easily tailored by the MWCNTs mold, capillary filling time, and the concentration of HErPc2. When the optical, electronic, and m…
Effect of particle size and shape on the order–disorder phase transition in diblock copolymers
The effect of spherical and sphero-cylindrical fillers on the order–disorder transition (ODT) of a symmetric diblock copolymer melt is investigated. Self-consistent equations describing the copolymer density distribution in the presence of fillers are derived. Using these equations, we calculate the excess free energy…
Heterostereocomplexes Prepared from d-Poly(lactide) and Leuprolide. I. Characterization
Heterostereocomplexes between d-PLA and l-peptides, obtained by spontaneous precipitation from acetonitrile solution, were characterized by thermal analysis and microscopic techniques. Differential scanning calorimetry showed two transition endotherms, one for the alpha form that melts at 178 degrees C and one for the…
Intense visible light emission from stress-activated SrMgAl6O11:Eu
We have investigated deformation luminescence phenomena and the constituent phases of SrMgAl6O11:Eu. The deformation luminescence is clearly visible to the naked eye in air, and the luminescence intensity is the highest among the materials reported. Using x-ray diffraction the constituent phases of SrMgAl6O11:Eu are d…