Results 1 to 10 of about 4,399 (209)

Interference and interferometry in electron holography [PDF]

Microscopy (Oxford, England), 2021
Abstract This paper reviews the basics of electron holography as an introduction of the holography part of this special issue in Microscopy. We discuss the general principle of holography and interferometry regarding measurements and analyses of phase distributions, first using the optical holography.
Harada K.
exaly   +5 more sources

Investigation of gas-electron interactions with electron holography

Ultramicroscopy, 2021
Using the combination of off-axis electron holography and environmental Transmission Electron Microscopy (TEM), an experimental setup termed 'gas electron holography', we investigate how the presence of gas in the microscope affects the spatial and phase resolution of electron holograms. The gas is introduced either by using an Environmental TEM (ETEM)
M Beleggia
exaly   +5 more sources

Electron holography on Fraunhofer diffraction. [PDF]

Microscopy (Oxf), 2019
Electron holography in Fraunhofer region was realized by using an asymmetric double slit. A Fraunhofer diffraction wave from a wider slit worked as an objective wave interfered with a plane wave from a narrower slit as a reference wave under the pre-Fraunhofer condition and recorded as a hologram.
Harada K, Niitsu K, Shimada K, Kodama T, Akashi T, Ono YA, Shindo D, Shinada H, Mori S.   +8 more
europepmc   +5 more sources

Electron Holography for Advanced Characterization of Permanent Magnets: Demagnetization Field Mapping and Enhanced Precision in Phase Analysis [PDF]

Nanomaterials
This review explores a method of visualizing a demagnetization field (Hd) within a thin-foiled Nd2Fe14B specimen using electron holography observation. Mapping the Hd is critical in electron holography as it provides the only information on magnetic flux
Sujin Lee
doaj   +2 more sources

Synergistic use of gradient flipping and phase prediction for inline electron holography [PDF]

Scientific Reports, 2022
Inline holography in the transmission electron microscope is a versatile technique which provides real-space phase information that can be used for the correction of imaging aberrations, as well as for measuring electric and magnetic fields and strain ...
Cigdem Ozsoy-Keskinbora, Wouter Van den Broek, Chris B. Boothroyd, Rafal E. Dunin-Borkowski, Peter A. van Aken, Christoph T. Koch   +5 more
doaj   +2 more sources

Noise reduction of electron holography observations for a thin-foiled Nd-Fe-B specimen using the wavelet hidden Markov model [PDF]

Applied Microscopy
In this study, we investigate the effectiveness of noise reduction in electron holography, based on the wavelet hidden Markov model (WHMM), which allows the reasonable separation of weak signals from noise.
Sujin Lee, Yoshihiro Midoh, Yuto Tomita, Takehiro Tamaoka, Mitsunari Auchi, Taisuke Sasaki, Yasukazu Murakami   +6 more
doaj   +2 more sources

In-situ magnetization/heating electron holography to study the magnetic ordering in arrays of nickel metallic nanowires [PDF]

AIP Advances, 2018
Magnetic nanostructures of different size, shape, and composition possess a great potential to improve current technologies like data storage and electromagnetic sensing.
Eduardo Ortega, Ulises Santiago, Jason G. Giuliani, Carlos Monton, Arturo Ponce   +4 more
doaj   +2 more sources

Analysis of Nanowire pn-Junction with Combined Current–Voltage, Electron-Beam-Induced Current, Cathodoluminescence, and Electron Holography Characterization [PDF]

Micromachines
We present the characterization of a pn-junction GaAs nanowire. For the characterization, current–voltage, electron-beam-induced current, cathodoluminescence, and electron holography measurements are used. We show that by combining information from these
Nicklas Anttu, Elisabetta Maria Fiordaliso, José Cano Garcia, Giuliano Vescovi, David Lindgren   +4 more
doaj   +2 more sources

Direct Visualization of Surface Structure and Charge States of Ceria‐Supported Gold Catalysts Under Redox Conditions [PDF]

Advanced Science
Observing the surface structure and charge dynamics of catalysts during catalytic reactions is crucial for elucidating reaction mechanisms. However, nanoscale characterization of the catalyst structure and charge states in the presence of reactive gases ...
Ryotaro Aso, Takehiro Tamaoka, Hideto Yoshida, Hajime Hojo, Hiroki Sano, Yoshihiro Midoh, Hisahiro Einaga, Toshiaki Tanigaki, Yasukazu Murakami   +8 more
doaj   +2 more sources

X-ray in-line holography and holotomography at the NanoMAX beamline

Journal of Synchrotron Radiation, 2022
Coherent X-ray imaging techniques, such as in-line holography, exploit the high brilliance provided by diffraction-limited storage rings to perform imaging sensitive to the electron density through contrast due to the phase shift, rather than ...
Sebastian Kalbfleisch, Yuhe Zhang, Maik Kahnt, Khachiwan Buakor, Max Langer, Till Dreier, Hanna Dierks, Philip Stjärneblad, Emanuel Larsson, Korneliya Gordeyeva, Lert Chayanun, Daniel Söderberg, Jesper Wallentin, Martin Bech, Pablo Villanueva-Perez   +14 more
doaj   +1 more source