نتایج جستجو برای: low energy electron diffraction

تعداد نتایج: 2016027  

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2010

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Haihua Liu John Spencer Baskin Ahmed H Zewail

The development of four-dimensional ultrafast electron microscopy (4D UEM) has enabled not only observations of the ultrafast dynamics of photon-matter interactions at the atomic scale with ultrafast resolution in image, diffraction, and energy space, but photon-electron interactions in the field of nanoplasmonics and nanophotonics also have been captured by the related technique of photon-indu...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2009
B Santos E Loginova A Mascaraque A K Schmid K F McCarty J de la Figuera

We have grown epitaxial films a few atomic layers thick of iron oxides on ruthenium. We characterize the growth by low energy electron microscopy. Using selected-area diffraction and intensity-versus-voltage spectroscopy, we detect two distinct phases which are assigned as wüstite and magnetite. Spin-polarized low energy electron microscopy reveals magnetic domain patterns in the magnetite phas...

Journal: :Ultramicroscopy 2006
Ben McMorran John D Perreault T A Savas Alex Cronin

A nanostructured grating was used to diffract a low-energy (500 eV) electron beam, and the current transmitted into the zeroth diffraction order was greater than 5% of the incident beam current. This diffraction efficiency indicates that the 55-nm-wide grating bars absorb electrons but the 45-nm-wide slots between bars transmit electron de Broglie waves coherently. The diffraction patterns can ...

Mahsa Zarinkamar Majid Farahmandjou, Tahereh Pormirjafari Firoozabadi

Nano-crystalline particles of CeO2 have been synthesized by a low temperature chemical precipitation method. The precursor materials used in this research were Ce(NO3)3.6H2O, NaOH and diethylene glycol as surfactant. X-ray powder diffraction results showed that face centered cubic CeO2 nanoparticles with crystalline size in nanometer scale were formed. Scanning electron microscopy measurement s...

Journal: :Acta Crystallographica Section A Foundations and Advances 2018

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