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Phase transformation of PbSe/CdSe nanocrystals from core-shell to Janus structure studied by photoemission spectroscopy
- Source :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2013, 87, pp.184102-1-11. ⟨10.1103/PhysRevB.87.184102⟩, Physical Review B : Condensed matter and materials physics, Physical Review B : Condensed matter and materials physics, American Physical Society, 2013, 87, pp.184102-1-184102-11. ⟨10.1103/PhysRevB.87.184102⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 87, pp.184102-1-184102-11. ⟨10.1103/PhysRevB.87.184102⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2013, 87, pp.184102-1-184102-11. ⟨10.1103/PhysRevB.87.184102⟩, PHYSICAL REVIEW B, Physical review. B, Condensed matter and materials physics (Online) 87 (2013): 184102. doi:10.1103/PhysRevB.87.184102, info:cnr-pdr/source/autori:J. Habinshuti, P. Capiod, T. H. Nguyen, Y. Justo, F. J. Avila, M. C. Asensio, F. Bournel, J.-J. Gallet, I. Vobornik, J. Fujii, A. Addad, K. Lambert, J. P. Nys, Y. Lambert, Z. Hens, A. Osherov, Y. Golan, O. Robbe, S. Turrell, and B. Grandidier/titolo:Phase transformation of PbSe%2FCdSe nanocrystals from core-shell to Janus structure studied by photoemission spectroscopy/doi:10.1103%2FPhysRevB.87.184102/rivista:Physical review. B, Condensed matter and materials physics (Online)/anno:2013/pagina_da:184102/pagina_a:/intervallo_pagine:184102/volume:87
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- Photoelectron spectroscopic measurements have been performed, with synchrotron radiation on PbSe/CdSe heteronanocrystals that initially consist of core-shell structures. The study of the chemical states of the main elements in the nanocrystals shows a reproducible and progressive change in the valence-band and core-level spectra under photon irradiation, whatever the core and shell sizes are. Such chemical modifications are explained in light of transmission electron microscopy observations and reveal a phase transformation of the nanocrystals: The core-shell nanocrystals undergo a morphological change toward a Janus structure with the formation of semidetached PbSe and CdSe clusters. Photoelectron spectroscopy gives new insight into the reorganization of the ligands anchored at the surface of the nanocrystals and the modification of the electronic structure of these heteronanocrystals.
- Subjects :
- LEVEL SHIFT
Materials science
Photoemission spectroscopy
SURFACE-STRUCTURE
02 engineering and technology
Electronic structure
EPITAXY
01 natural sciences
61.46.Hk
X-ray photoelectron spectroscopy
Phase (matter)
0103 physical sciences
Janus
010306 general physics
COLLOIDAL PBSE
PACS number(s): 64.70.Nd
BINDING-ENERGY
CORE/SHELL QUANTUM DOTS
021001 nanoscience & nanotechnology
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
ELECTRONIC-STRUCTURE
Chemical state
Physics and Astronomy
Nanocrystal
Transmission electron microscopy
Chemical physics
RAY PHOTOELECTRON-SPECTROSCOPY
X-RAY
CATION-EXCHANGE
Atomic physics
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 10980121, 1550235X, 01631829, and 10953795
- Database :
- OpenAIRE
- Journal :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2013, 87, pp.184102-1-11. ⟨10.1103/PhysRevB.87.184102⟩, Physical Review B : Condensed matter and materials physics, Physical Review B : Condensed matter and materials physics, American Physical Society, 2013, 87, pp.184102-1-184102-11. ⟨10.1103/PhysRevB.87.184102⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 87, pp.184102-1-184102-11. ⟨10.1103/PhysRevB.87.184102⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2013, 87, pp.184102-1-184102-11. ⟨10.1103/PhysRevB.87.184102⟩, PHYSICAL REVIEW B, Physical review. B, Condensed matter and materials physics (Online) 87 (2013): 184102. doi:10.1103/PhysRevB.87.184102, info:cnr-pdr/source/autori:J. Habinshuti, P. Capiod, T. H. Nguyen, Y. Justo, F. J. Avila, M. C. Asensio, F. Bournel, J.-J. Gallet, I. Vobornik, J. Fujii, A. Addad, K. Lambert, J. P. Nys, Y. Lambert, Z. Hens, A. Osherov, Y. Golan, O. Robbe, S. Turrell, and B. Grandidier/titolo:Phase transformation of PbSe%2FCdSe nanocrystals from core-shell to Janus structure studied by photoemission spectroscopy/doi:10.1103%2FPhysRevB.87.184102/rivista:Physical review. B, Condensed matter and materials physics (Online)/anno:2013/pagina_da:184102/pagina_a:/intervallo_pagine:184102/volume:87
- Accession number :
- edsair.doi.dedup.....9e1a0edfcde7dee8a53c8ac8cf80d7e3