Characterization of a 20-nm hard x-ray focus by ptychographic coherent diffractive imaging

2011 ◽  
Author(s):  
Joan Vila-Comamala ◽  
Ana Diaz ◽  
Manuel Guizar-Sicairos ◽  
Sergey Gorelick ◽  
Vitaliy A. Guzenko ◽  
...  
Keyword(s):  
Diffractive Imaging ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
20 Nm

scholarly journals Characterization of high-resolution diffractive X-ray optics by ptychographic coherent diffractive imaging

2011 ◽  
Vol 19 (22) ◽  
pp. 21333 ◽  
Author(s):  
Joan Vila-Comamala ◽  
Ana Diaz ◽  
Manuel Guizar-Sicairos ◽  
Alexandre Mantion ◽  
Cameron M. Kewish ◽  
...  
Keyword(s):  
High Resolution ◽  
Diffractive Imaging ◽  
Ray Optics ◽  
X Ray ◽  
Coherent Diffractive Imaging

scholarly journals Coherent imaging at the diffraction limit

2014 ◽  
Vol 21 (5) ◽  
pp. 1011-1018 ◽  
Author(s):  
Pierre Thibault ◽  
Manuel Guizar-Sicairos ◽  
Andreas Menzel
Keyword(s):  
Three Dimensions ◽  
Coherent Imaging ◽  
Field Methods ◽  
Diffractive Imaging ◽  
Time Resolved ◽  
Full Field ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Time Resolved Imaging

X-ray ptychography, a scanning coherent diffractive imaging technique, holds promise for imaging with dose-limited resolution and sensitivity. If the foreseen increase of coherent flux by orders of magnitude can be matched by additional technological and analytical advances, ptychography may approach imaging speeds familiar from full-field methods while retaining its inherently quantitative nature and metrological versatility. Beyond promises of high throughput, spectroscopic applications in three dimensions become feasible, as do measurements of sample dynamics through time-resolved imaging or careful characterization of decoherence effects.

Characterization of x-ray phase vortices by ptychographic coherent diffractive imaging

2014 ◽  
Vol 39 (18) ◽  
pp. 5281 ◽  
Author(s):  
J. Vila-Comamala ◽  
A. Sakdinawat ◽  
M. Guizar-Sicairos
Keyword(s):  
Diffractive Imaging ◽  
X Ray ◽  
Coherent Diffractive Imaging

scholarly journals Hard X-ray polarizer to enable simultaneous three-dimensional nanoscale imaging of magnetic structure and lattice strain

2016 ◽  
Vol 23 (5) ◽  
pp. 1210-1215 ◽  
Author(s):  
Jonathan Logan ◽  
Ross Harder ◽  
Luxi Li ◽  
Daniel Haskel ◽  
Pice Chen ◽  
...  
Keyword(s):  
Magnetic Circular Dichroism ◽  
Three Dimensional ◽  
Control Sample ◽  
Magnetic Ordering ◽  
X Rays ◽  
Diffractive Imaging ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Diffraction Patterns ◽  
A New Technique

Recent progress in the development of dichroic Bragg coherent diffractive imaging, a new technique for simultaneous three-dimensional imaging of strain and magnetization at the nanoscale, is reported. This progress includes the installation of a diamond X-ray phase retarder at beamline 34-ID-C of the Advanced Photon Source. The performance of the phase retarder for tuning X-ray polarization is demonstrated with temperature-dependent X-ray magnetic circular dichroism measurements on a gadolinium foil in transmission and on a Gd5Si2Ge2crystal in diffraction geometry with a partially coherent, focused X-ray beam. Feasibility tests for dichroic Bragg coherent diffractive imaging are presented. These tests include (1) using conventional Bragg coherent diffractive imaging to determine whether the phase retarder introduces aberrations using a nonmagnetic gold nanocrystal as a control sample, and (2) collecting coherent diffraction patterns of a magnetic Gd5Si2Ge2nanocrystal with left- and right-circularly polarized X-rays. Future applications of dichroic Bragg coherent diffractive imaging for the correlation of strain and lattice defects with magnetic ordering and inhomogeneities are considered.

scholarly journals Synthesis and characterization of nanoscale composite particles formed by 2D layers of Cu-Fe sulfide and Mg-based hydroxide

2021 ◽  
Author(s):  
Yuri Mikhlin ◽  
Roman Borisov ◽  
Sergey Vorobyev ◽  
Yevgeny Tomashevich ◽  
Alexander Romanchenko ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Localized Surface Plasmon ◽  
X Ray ◽  
Zeta Potentials ◽  
Dielectric Resonance ◽  
Magnetic Dynamic ◽  
20 Nm ◽  
Electron Energy Loss

Two-dimensional phenomena are attracting enormous interest at present and the search for novel 2D materials is very challenging. We propose here the layered material valleriite composed of altering atomic sheets of Cu-Fe sulfide and Mg-based hydroxide synthesized via a simple hydrothermal pathway as particles of 50-200 nm in the lateral size and 10-20 nm thick. The solid products and aqueous colloids prepared with various precursor ratios were examined using XRD, TEM, EDS, X-ray photoelectron spectroscopy (XPS), reflection electron energy loss spectroscopy (REELS), Raman, Mössbauer, UV-vis-NIR spectroscopies, magnetic, dynamic light scattering, zeta potential measurements. The material properties are largely determined by the narrow-gap (less than 0.5 eV) sulfide layers containing Cu+ and Fe3+ cations, monosulfide and minor polysulfide anions but are strongly affected by the hydroxide counterparts. Particularly, Fe distribution between sulfide (55-90%) and magnesium hydroxide layers is controlled through insertion of Al into the hydroxide part and by Cr and Co dopants entering both layers. Room-temperature Mössbauer signals of paramagnetic Fe3+ transformed to several Zeeman sextets with hyperfine magnetic fields up to 500 kOe in the sulfide layers at 4 K. Paramagnetic or more complicated characters were observed for valleriites with higher and lower Fe concentrations in hydroxide sheets, respectively. Valleriite colloids showed negative zeta potentials, suggesting negative electric charging of the hydroxide sheets, and optical absorption maxima between 500 nm and 700 nm, also depended on the Fe distribution. The last features observed also in the REELS spectra may be due to localized surface plasmon or, more likely, quasi-static dielectric resonance. The tunable composition, electronic, magnetic, optic and surface properties highlight valleriites as a rich platform for novel 2D composites promising for numerous applications.

Measurement and characterization of precision rotary axes at the European Synchrotron Radiation Facility

2010 ◽  
Vol 1 (MEDSI-6) ◽  
Author(s):  
M. Nicola ◽  
H. P. van der Kleij
Keyword(s):  
Spot Size ◽  
European Synchrotron Radiation Facility ◽  
Precision Engineering ◽  
Static Mode ◽  
X Ray ◽  
Rotary Axes ◽  
Rotary Stage ◽  
Measurement Principle ◽  
20 Nm

For some beamlines, where the X-ray beam is focussed to less than 100 nm spot size, it is necessary to rotate the sample using very accurate rotary axes. The accuracy of these devices is defined in terms of radial, axial and tilt errors. At the Precision Engineering Laboratory of the ESRF, we are able to calibrate rotary stages and spindles in agreement with the ISO 230-7 and ASME B89.3.4 standards, in static mode (step by step, at given position increments) or in continuous motion. This type of measurement is possible through the use of non-contact capacitive sensors (with measuring resolution in the field of the nanometre) and reference spherical artefacts, working under controlled environmental conditions to minimize the influence of thermal instabilities. The setup includes a special granite stage with a gantry, supported by an active anti-vibration system. The presentation will illustrate the measurement principle and some examples of calibrations, including results obtained on a motorized air-bearing rotary stage for which the measured errors are about 20 nm.

SYNTHESIS AND CHARACTERIZATION OF ZnO NANORODS AND NANOWIRES USING PVP AS CAPPING

2009 ◽  
Vol 08 (03) ◽  
pp. 285-287 ◽  
Author(s):  
M. ESKANDARI ◽  
V. AHMADI ◽  
Sh. AHMADI
Keyword(s):  
Solution Method ◽  
Zno Nanorods ◽  
Green Emission ◽  
Zno Nanowires ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Solution Method ◽  
Air Atmosphere ◽  
20 Nm

In this study, ZnO nanowires are synthesized via ZnO nanorods at low temperature by using zinc acetate dehydrate and polyvinylpyrrolidone as precursor and capping, respectively. We use chemical solution method for synthesis of ZnO nanowires. Samples are characterized by means of scanning electron microscopy and X-ray diffraction. First, the nanorods are prepared at 300°C temperature, and then they are put into the furnace under air atmosphere at 450°C for 2 h. It is observed that nanowires with 20 nm diameter are produced. Photoluminescence spectra of nanorods and nanowires are compared. It shows that intensity of ultraviolet peak in the nanowires decreases but in contrast the intensity of green emission part increases. This is because, the surface effects such as oxygen vacancies increase in the structures of ZnO .

scholarly journals Cryo-coherent diffractive imaging of biological samples with X-ray free-electron lasers

2016 ◽  
Vol 72 (2) ◽  
pp. 177-178
Author(s):  
Huaidong Jiang
Keyword(s):  
Biological Samples ◽  
Free Electron ◽  
Free Electron Laser ◽  
Free Electron Lasers ◽  
Diffractive Imaging ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Recent Developments

Recent developments in the imaging of biological samples using the X-ray free-electron laser at the SACLA facility are highlighted.

scholarly journals Single-Shot X-Ray Coherent Diffractive Imaging of Superfluid He Nanodroplets

2014 ◽  
Vol 70 (a1) ◽  
pp. C289-C289
Author(s):  
Oliver Gessner ◽  
Christoph Bostedt ◽  
Andrey Vilesov
Keyword(s):  
Cross Sections ◽  
Direct Access ◽  
Single Shot ◽  
Diffractive Imaging ◽  
Helium Droplets ◽  
Helium Nanodroplets ◽  
Time Resolved ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Quantum Phenomena

Single-shot coherent diffractive imaging (CDI) experiments were performed on pure and doped helium nanodroplets using femtosecond X-ray pulses from the Linac Coherent Light Source (LCLS). The superfluid nature of helium droplets presents a rare opportunity to study the onset of macroscopic quantum phenomena in finite, sub-micron scale systems. Despite the small X-ray scattering cross sections of atomic helium, high-quality single-shot CDI data were obtained that give direct access to sizes and shapes of individual nanodroplets. The diffraction patterns from helium droplets doped with xenon atoms differ starkly from the patterns from pure droplets. Strong indications for the formation of complex xenon structures inside the superfluid helium environment are observed, giving access to information about the structure and aggregation dynamics of the dopant species. The results are discussed with respect to the hydrodynamic properties of the superfluid droplets and compared to those of classical drops. An outlook on femtosecond time-resolved CDI experiments to study dynamics in pure and Xe-doped He nanodroplets will be given based on a new undulator-based X-ray pump/X-ray probe technique that is currently under development at LCLS.

scholarly journals Numerical Analysis of Antiphase Domain Boundaries in a FeAl Alloy Using X-Ray Bragg Coherent Diffractive Imaging

2018 ◽  
Vol 24 (S2) ◽  
pp. 50-51 ◽  
Author(s):  
Chan Kim ◽  
Virginie Chamard ◽  
Jorg Hallmann ◽  
Wei Lu ◽  
Ulrike Boesenberg ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Antiphase Domain ◽  
Diffractive Imaging ◽  
Feal Alloy ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Domain Boundaries
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