Results 11 to 20 of about 86,392 (294)

Using crystallography tools to improve vaccine formulations

IUCrJ, 2022
This article summarizes developments attained in oral vaccine formulations based on the encapsulation of antigen proteins inside porous silica matrices.
Márcia Carvalho de Abreu Fantini, Cristiano Luis Pinto Oliveira, José Luiz de Souza Lopes, Tereza da Silva Martins, Milena Apetito Akamatsu, Aryene Góes Trezena, Milene Tino-De- Franco, Viviane Fongaro Botosso, Osvaldo Augusto Brazil Esteves Sant'Anna, Nikolay Kardjilov, Martin Kjaerulf Rasmussen, Heloísa Nunes Bordallo   +11 more
doaj   +1 more source

HERMES – a GUI-based software tool for pre-processing of X-ray absorption spectroscopy data from laboratory Rowland circle spectrometers

Journal of Synchrotron Radiation, 2022
HERMES, a graphical user interface software tool, is presented, for pre-processing X-ray absorption spectroscopy (XAS) data from laboratory Rowland circle spectrometers, to meet the data handling needs of a growing community of practice.
Marco E. Seddon-Ferretti, Lucy M. Mottram, Martin C. Stennett, Claire L. Corkhill, Neil C. Hyatt   +4 more
doaj   +1 more source

Finite-temperature effects on the x-ray absorption spectra of crystalline alumina from first principles

AIP Advances, 2023
By including phonon-assisted transitions within plane-wave density functional theory methods for calculating the x-ray absorption spectrum (XAS), we obtain the Al K-edge XAS at 300 K for two crystalline Al2O3 phases. The 300 K XAS reproduces the pre-edge
A. F. Harper, B. Monserrat, A. J. Morris
doaj   +1 more source

High-spin state and magnetic coupling induced through interfacial orbital reconstruction observed in SrRuO3/LaNiO3 superlattice

Materials Research Letters, 2020
A high-spin state of SrRuO3 at the interface and large magnetic coupling were observed in SrRuO3/LaNiO3 superlattices. X-ray absorption spectroscopy and X-ray linear dichroism results show preferential occupation of the d3z2-r2 orbitals.
Peng Liu, Xingkun Ning
doaj   +1 more source

CatMass: software for calculating optimal sample masses for X-ray absorption spectroscopy experiments involving complex sample compositions

Journal of Synchrotron Radiation, 2023
This paper presents software for calculating the optimal mass of samples with complex compositions (e.g. supported metal catalysts) for X-ray absorption spectroscopy (XAS) and scattering measurements.
Jorge E. Perez-Aguilar, Ash Caine, Simon R. Bare, Adam S. Hoffman   +3 more
doaj   +1 more source

Phase stability and the arsenic vacancy defect in In_xGa_1-xAs [PDF]

, 2011
The introduction of defects, such as vacancies, into InxGa1-xAs can have a dramatic impact on the physical and electronic properties of the material. Here we employ ab initio simulations of quasirandom supercells to investigate the structure of InxGa1 ...
Chroneos, A., Grimes, R. W., Jiang, C., Murphy, S. T., Schwingenschlögl, U.   +4 more
core   +1 more source

Mapping of AlxGa1–xAs band edges by ballistic electron emission spectroscopy [PDF]

, 1997
We have employed ballistic electron emission microscopy (BEEM) to study the energy positions in the conduction band of AlxGa1 – xAs. Epilayers of undoped AlxGa1 – xAs were grown by molecular beam epitaxy on conductive GaAs substrates.
Cheng, X.-C., Collins, D. A., McGill, T. C.   +2 more
core   +1 more source

Determination of the relative concentrations of rare earth ions by x-ray absorption spectroscopy: Application to terbium mixed oxides [PDF]

, 1986
A method, based on X-ray absorption spectroscopy (XAS) in the range 0.8–1.5 keV, to determine the relative amounts of rare earth ions in different valencies is explained and tested for the case of terbium mixed oxides.
Burggraaf, A.J., Dijk, M.P. van, Esteva, J.-M., Fuggle, J.C., Karnatak, R., Laan, G. van der   +5 more
core   +2 more sources

Autonomous atomic Hamiltonian construction and active sampling of X-ray absorption spectroscopy by adversarial Bayesian optimization

npj Computational Materials, 2023
X-ray absorption spectroscopy (XAS) is a well-established method for in-depth characterization of electronic structure. In practice hundreds of energy-points should be sampled during the measurements, and most of them are redundant.
Yixuan Zhang, Ruiwen Xie, Teng Long, Damian Günzing, Heiko Wende, Katharina J. Ollefs, Hongbin Zhang   +6 more
doaj   +1 more source

Turbo-XAS: dispersive XAS using sequential acquisition

Journal of Synchrotron Radiation, 1999
A new experimental technique for time-resolved X-ray absorption studies in the sub-second range has been successfully tested on the dispersive XAS beamline (ID24) at the ESRF. It consists of a sequential acquisition of energy points using the dispersive optics scheme installed on the beamline.
S. Pascarelli, T. Neisius, S. De Panfilis   +2 more
openaire   +1 more source