Zobrazeno 1 - 10
of 278
pro vyhledávání: '"A. R. Koymen"'
Publikováno v:
APL Energy, Vol 2, Iss 1, Pp 016105-016105-11 (2024)
We have designed and fabricated TiN/SiO2/TiN–HfO2-based new metamaterial microstructures as an absorber of the visible wavelength, in the range of 400–700 nm, with exceptionally high absorption efficiency (>96%) for solar energy harvesting purpos
Externí odkaz:
https://doaj.org/article/f329a77beb6d42ffbff01b7c53f991d5
Autor:
V. A. Chirayath, V. Callewaert, A. J. Fairchild, M. D. Chrysler, R. W. Gladen, A. D. Mcdonald, S. K. Imam, K. Shastry, A. R. Koymen, R. Saniz, B. Barbiellini, K. Rajeshwar, B. Partoens, A. H. Weiss
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
Auger processes are at the core of electron emission in solid-state physics, however measuring the spectra of electrons emitted solely as a result of Auger transitions remains a challenge. Here, the authors measure the electron energy spectrum in gra
Externí odkaz:
https://doaj.org/article/9c053af230f64e04a827e9fd401cffda
Autor:
Alexander J. Fairchild, Varghese A. Chirayath, Randall W. Gladen, Ali R. Koymen, Alex H. Weiss, Bernardo Barbiellini
Publikováno v:
Physical review letters. 129(10)
We present a spectroscopic method which utilizes virtual photons to selectively measure the electronic structure of the topmost atomic layer. These virtual photons are created when incident positrons transition from vacuum states to bound surface sta
Publikováno v:
Acta Physica Polonica A. 137:87-90
Autor:
A. J. Fairchild, Philip A. Sterne, E. Perez, Ali R. Koymen, Alex H. Weiss, S. Lotfimarangloo, R. W. Gladen, Varghese Anto Chirayath
Publikováno v:
Acta Physica Polonica A. 137:81-86
Autor:
Philip A. Sterne, Varghese Anto Chirayath, Alex H. Weiss, A. J. Fairchild, R. W. Gladen, Ali R. Koymen, S. Lotfimarangloo, M. T. Manry, T. N. Shead
Publikováno v:
Acta Physica Polonica A. 137:101-104
Publikováno v:
Journal of Functional Biomaterials, Vol 8, Iss 4, p 46 (2017)
The aim of this study is to fabricate a hybrid composite of iron (Fe) core–carbon (C) shell nanoparticles with enhanced magnetic properties for contrast enhancement in magnetic resonance imaging (MRI). These new classes of magnetic core–shell nan
Externí odkaz:
https://doaj.org/article/2ab9806eeb5c450b9413e24ebd8210c9
Autor:
Alex H. Weiss, A. J. Fairchild, Varghese Anto Chirayath, M. T. Manry, R. W. Gladen, A. R. Koymen
We describe here an efficient machine-learning based approach for the optimization of parameters used for extracting the arrival time of waveforms, in particular those generated by the detection of 511 keV annihilation γ -rays by a 60 cm3 coaxial hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8f613cfeb3326d2940d99bbc9c51480
http://arxiv.org/abs/2004.00008
http://arxiv.org/abs/2004.00008
Direct evidence for low-energy electron emission following O LVV Auger transitions at oxide surfaces
Autor:
Alex H. Weiss, A. J. Fairchild, A. R. Koymen, Philip A. Sterne, Varghese Anto Chirayath, R. W. Gladen
Publikováno v:
Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
Oxygen, the third most abundant element in the universe, plays a key role in the chemistry of condensed matter and biological systems. Here, we report evidence for a hitherto unexplored Auger transition in oxides, where a valence band electron fills
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f4574426079829a7dbcfd78ef9006fc
http://arxiv.org/abs/2003.02975
http://arxiv.org/abs/2003.02975
Autor:
Alex H. Weiss, A. R. Koymen, Philip A. Sterne, R. W. Gladen, A. J. Fairchild, Varghese Anto Chirayath
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 251:147095
We have applied positron annihilation induced Auger-gamma coincidence spectroscopy to identify important mechanisms responsible for the emission of low energy electrons following the sudden creation of holes in bilayer graphene on copper substrate. T