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Structural and optical properties of Al2O3 with Si and Ge nanocrystals
Date
2006-12-01
Author
Yerci, Selçuk
Yıldız, İlker
Serincan, Uğur
Shandalov, Michael
Golan, Yuval
Turan, Raşit
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https://hdl.handle.net/11511/81174
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Structural and optical properties of Al2O3 with Si and Ge nanocrystals
Yerci, Selçuk; Yıldız, İlker; Serincan, Ugur; Shandalov, Michael; Golan, Yuval; Turan, Raşit (2007-07-04)
Si and Ge nanocrystals were formed in Al2O3 matrix by ion implantation and subsequent annealing. The phase separation of the Si nanocrystals was observed using X-ray photoelectron spectroscopy by monitoring Si 2p electrons. During nanocrystal formation with a high temperature annealing Si4+ signals corresponding to Si nanoclusters increase while Si 4+ signals related to a-SiO2 disappear from the spectrum. The transition from amorphous to nanocrystalline phase for both Si and Ge nanoclusters and the compress...
Structural and optical properties of A12O3 with Si and Ge nanocrystals
Yerci, Selçuk; Kara, İlkim Merve; Serincan, Ugur; Shandalov, Michael; Golan, Yuval; Turan, Raşit (2006-12-01)
Si and Ge nanocrystals were formed in Al2O3 matrix by ion implantation and subsequent annealing. The phase separation of the Si nanocrystals was observed using X-ray photoelectron spectroscopy by monitoring Si 2p electrons. During nanocrystal formation with a high temperature annealing Si-0 signals corresponding to Si nanoclusters increase while Si4+ signals related to a-SiO2 disappear from the spectrum. The transition from amorphous to nanocrystalline phase for both Si and Ge nanoclusters and the compressi...
Structural and electronic properties of lithium endohedral doped carbon nanocapsules
Pekoz, Rengin; Erkoç, Şakir (Elsevier BV, 2007-02-01)
Endohedral lithium and lithium ion doped carbon nanocapsule (CNC) systems have been theoretically investigated by performing semi-empirical molecular orbital method at the level of PM3 (UHF and/or RHF) type quantum chemical treatment in order to explore the energetics and electronic structures. The geometries of the studied systems have been optimized and the molecular properties, energies, some selected molecular orbital eigenvalues and dipole moments of the studied capsules are reported. Molecular dynamic...
Structural and optical properties of porous nanocrystalline Ge
Kartopu, G.; Sapelkin, A. V.; Karavanskii, V. A.; Serincan, U.; Turan, Raşit (AIP Publishing, 2008-06-01)
Nanocrystalline Ge films were prepared by isotropic chemical etching on single-crystalline Ge substrates with 100 and 111 orientations. The structural and optical properties have been investigated by transmission electron microscopy (TEM), electron diffraction (ED), Raman photoluminescence (PL), and infrared spectroscopy. The average size of nanocrystals (NCs) was estimated by fitting of the Raman spectra using a phonon-confinement model developed for spherical semiconductor NCs. Considered collectively TEM...
Structural and electronic properties of single-wall ZnO nanotubes
Erkoç, Şakir; Kokten, H (Elsevier BV, 2005-07-01)
The structural and electronic properties of armchair and zigzag models of single-wall ZnO nanotubes have been investigated by performing semiempirical molecular orbital self-consistent field calculations at the level of AM1 method within the RHF formulation. It has been found that these structures are stable and endothermic. The armchair model has zero net dipole moment, whereas the zigzag model has nonzero net dipole moment. The interfrontier molecular energy gap of these systems are different; the gap of ...
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S. Yerci, İ. Yıldız, U. Serincan, M. Shandalov, Y. Golan, and R. Turan, “Structural and optical properties of Al2O3 with Si and Ge nanocrystals,” 2006, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/81174.