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Light-induced high-...
Light-induced high-spin state in ZnO nanoparticles
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- Savoyant, A. (author)
- Aix Marseille Univ, France
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- Rollo, M. (author)
- Aix Marseille Univ, France
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- Texier, M. (author)
- Aix Marseille Univ, France
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- Elhadi Adam, Rania Elhadi (author)
- Linköpings universitet,Fysik, elektroteknik och matematik,Tekniska fakulteten
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- Bernardini, S. (author)
- Aix Marseille Univ, France
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- Pilone, O. (author)
- Aix Marseille Univ, France
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- Margeat, O. (author)
- Aix Marseille Univ, France
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- Nur, Omer (author)
- Linköpings universitet,Fysik, elektroteknik och matematik,Tekniska fakulteten
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- Willander, Magnus (author)
- Linköpings universitet,Fysik, elektroteknik och matematik,Tekniska fakulteten
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- Bertaina, S. (author)
- Aix Marseille Univ, France
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(creator_code:org_t)
- 2019-12-10
- 2020
- English.
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In: Nanotechnology. - : IOP PUBLISHING LTD. - 0957-4484 .- 1361-6528. ; 31:9
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Abstract
Subject headings
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- The effects of white-light irradiation on similar to 15.nm diameter ZnO nanoparticles are investigated by means of electron paramagnetic resonance, near liquid-nitrogen and liquid-helium temperatures. Under dark conditions, usual core- and surface-defects are detected, respectively, at g = 1.960 and g = 2.003. Under white-light illumination, the core-defect signal intensity is strongly increased, which is to be correlated to the light-induced conductivitys augmentation. Beside, a four-lines structure appears, with the same gravity center as that of the surface defects. Simulations and intensity power-dependence measurements show that this four-line-structure is very likely to arise from a localized high spin S = 2, induced by light irradiation, and subjected to a weak axial anisotropy. At 85K, this high-spin state can last several hours after the light-irradiation removal, probably due to highly spin-forbidden recombination process. The possible excited resonant complexes at the origin of this signal are discussed. Other light-induced S = 1/2-like centers are detected as well, which depend on the nanoparticles growth conditions.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- ZnO nanoparticle; EPR; light-matter interaction; high spin
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Savoyant, A.
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Rollo, M.
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Texier, M.
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Elhadi Adam, Ran ...
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Bernardini, S.
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Pilone, O.
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show more...
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Margeat, O.
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Nur, Omer
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Willander, Magnu ...
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Bertaina, S.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Nanotechnology
- By the university
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Linköping University