Metallic Cobalt to Spinel Co3O4—Electronic Structure Evolution by Near-Ambient Pressure Photoelectron Spectroscopy

2017 ◽  
Vol 121 (39) ◽  
pp. 21472-21481 ◽  
Author(s):  
Kasala Prabhakar Reddy ◽  
Ruchi Jain ◽  
Manoj Kumar Ghosalya ◽  
Chinnakonda S. Gopinath
Keyword(s):  
Electronic Structure ◽  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
Structure Evolution ◽  
Metallic Cobalt

scholarly journals A photoelectron spectroscopy study of the electronic structure evolution in CuInSe2-related compounds at changing copper content

2012 ◽  
Vol 101 (11) ◽  
pp. 111607 ◽  
Author(s):  
T. V. Kuznetsova ◽  
V. I. Grebennikov ◽  
H. Zhao ◽  
C. Derks ◽  
C. Taubitz ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photoelectron Spectroscopy ◽  
Copper Content ◽  
Structure Evolution ◽  
Spectroscopy Study ◽  
Related Compounds

Enhanced Fast Response to Hg0 by Adsorption-Induced Electronic Structure Evolution of Ti2C Nanosheet

2021 ◽  
pp. 148925
Author(s):  
Tao Yang ◽  
Xingang Jiang ◽  
Wencai Yi ◽  
Xiaomin Cheng ◽  
Tiexin Cheng
Keyword(s):  
Electronic Structure ◽  
Fast Response ◽  
Structure Evolution

scholarly journals In situ monitoring of the influence of water on DNA radiation damage by near-ambient pressure X-ray photoelectron spectroscopy

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Marc Benjamin Hahn ◽  
Paul M. Dietrich ◽  
Jörg Radnik
Keyword(s):  
Dna Damage ◽  
Radiation Damage ◽  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
In Situ Monitoring ◽  
Strong Increase ◽  
Oh Radicals ◽  
Strand Breaks ◽  
X Ray

AbstractIonizing radiation damage to DNA plays a fundamental role in cancer therapy. X-ray photoelectron-spectroscopy (XPS) allows simultaneous irradiation and damage monitoring. Although water radiolysis is essential for radiation damage, all previous XPS studies were performed in vacuum. Here we present near-ambient-pressure XPS experiments to directly measure DNA damage under water atmosphere. They permit in-situ monitoring of the effects of radicals on fully hydrated double-stranded DNA. The results allow us to distinguish direct damage, by photons and secondary low-energy electrons (LEE), from damage by hydroxyl radicals or hydration induced modifications of damage pathways. The exposure of dry DNA to x-rays leads to strand-breaks at the sugar-phosphate backbone, while deoxyribose and nucleobases are less affected. In contrast, a strong increase of DNA damage is observed in water, where OH-radicals are produced. In consequence, base damage and base release become predominant, even though the number of strand-breaks increases further.

scholarly journals New ambient pressure X-ray photoelectron spectroscopy endstation at Taiwan light source

2019 ◽  
Author(s):  
Chia-Hsin Wang ◽  
Sun-Tang Chang ◽  
Sheng-Yuan Chen ◽  
Yaw-Wen Yang
Keyword(s):  
Light Source ◽  
Photoelectron Spectroscopy ◽  
Ambient Pressure ◽  
X Ray

Electronic structure of actinide antimonides and tellurides from photoelectron spectroscopy

2004 ◽  
Vol 70 (20) ◽  
Author(s):  
T. Durakiewicz ◽  
J. J. Joyce ◽  
G. H. Lander ◽  
C. G. Olson ◽  
M. T. Butterfield ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photoelectron Spectroscopy

Fundamental Studies of Plutonium Aging

MRS Bulletin ◽  
2001 ◽  
Vol 26 (9) ◽  
pp. 679-683 ◽  
Author(s):  
Brian D. Wirth ◽  
Adam J. Schwartz ◽  
Michael J. Fluss ◽  
Maria J. Caturla ◽  
Mark A. Wall ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Conduction Band ◽  
Ambient Pressure ◽  
Radioactive Decay ◽  
Bound State ◽  
Environmental Safety ◽  
Structure Theory ◽  
Cubic Phase ◽  
High Symmetry ◽  
Safety And Health

Plutonium metallurgy lies at the heart of science-based stockpile stewardship. One aspect is concerned with developing predictive capabilities to describe the properties of stockpile materials, including an assessment of microstructural changes with age. Yet, the complex behavior of plutonium, which results from the competition of its 5f electrons between a localized (atomic-like or bound) state and an itinerant (delocalized bonding) state, has been challenging materials scientists and physicists for the better part of five decades. Although far from quantitatively absolute, electronic-structure theory provides a description of plutonium that helps explain the unusual properties of plutonium, as recently reviewed by Hecker. (See also the article by Hecker in this issue.) The electronic structure of plutonium includes five 5f electrons with a very narrow energy width of the 5f conduction band, which results in a delicate balance between itinerant electrons (in the conduction band) or localized electrons and multiple lowenergy electronic configurations with nearly equivalent energies. These complex electronic characteristics give rise to unique macroscopic properties of plutonium that include six allotropes (at ambient pressure) with very close free energies but large (∼25%) density differences, a lowsymmetry monoclinic ground state rather than a high-symmetry close-packed cubic phase, compression upon melting (like water), low melting temperature, anomalous temperature-dependence of electrical resistance, and radioactive decay. Additionally, plutonium readily oxidizes and is toxic; therefore, the handling and fundamental research of this element is very challenging due to environmental, safety, and health concerns.

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