The evolution of the morphology of Ge nanocrystals formed by ion implantation in SiO2

Date

2005-08-01

Author

Desnica, UV
Dubcek, P
Salamon, K
Desnica-Frankovic, ID
Buljan, M
Bernstoff, S
Serincan, U
Turan, Raşit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

125
views

0
downloads

Grazing incidence small angle X-ray scattering was applied to study the synthesis and growth of Ge quantum dots in Ge-implanted SiO2. Ge ion doses were up to 10(17)/cm(2), and subsequent annealing temperatures up to T-a = 1000 degrees C. Results suggest that ordered and correlated Ge QDs can be achieved by high-dose implantation followed by medium-T annealing.

URI

https://hdl.handle.net/11511/32950

Journal

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

DOI

https://doi.org/10.1016/j.nimb.2005.06.062

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

The role of amorphous precursor in phase selection hierarchy in marginal metallic glasses YILDIRIM, CİHAN; KUTSAL, M.; OTT, R. T.; BESSER, M. F.; KRAMER, M. J.; Kalay, Yunus Eren (Elsevier BV, 2016-12-15) The solid state amorphous structure and devitrification products of Al90Tb10 alloys produced by Cu block meltspinning and magnetron sputtering were investigated by a combined study of differential scanning calorimetry, in-situ X-ray diffraction and conventional transmission electron microscopy. The as-prepared specimens were found to be fully amorphous according to the electron and X-ray diffraction. The thermal analysis and in-situ XRD analyses of the amorphous samples having the same chemistry but differe...
A quantum chemical study of nitric oxide reduction by ammonia (SCR reaction) on V2O5 catalyst surface

Soyer, Sezen; Uzun, Alper; Senkan, Selim; Önal, Işık (2006-12-15)

The reaction mechanism for the selective catalytic reduction (SCR) of nitric oxide by ammonia on (010) V2O5 surface represented by a V2O9H8 cluster was simulated by means of density functional theory (DFT) calculations performed at B3LYP/6-31G** level. The computations indicated that SCR reaction consisted of three main parts. For the first part, ammonia activation on V2O5 was investigated. Ammonia was adsorbed on Bronsted acidic V-OH site as NH4+ species by a non-activated process with an exothermic relati...
The effect of substitutional impurities on the evolution of FeAl diffusion layer Akdeniz, Mahmut Vedat; Mehrabov, Amdulla (Elsevier BV, 1998-2-13) The formation and growth characteristics of Fe based aluminide diffusion layers at the Fe-Al interface have been analysed in terms of interfacial interaction potentials based on the statistico-thermodynamical theory of multicomponent alloys combined with electronic theory in the pseudopotential approximation. The pairwise interatomic interaction potentials and partial ordering energies have been calculated to predict the effect of various alloying additions on the activity coefficient of Al atoms in α-Fe0.9...
The flow of excitation energy in LHCII monomers: Implications for the structural model of the major plant antenna Gradinaru, CC; Ozdemir, S; Gulen, D; van Stokkum, IHM; van Grondelle, R; van Amerongen, H (1998-12-01) Spectral and kinetic information on energy transfer within the light-harvesting complex II (LHCII) monomer was obtained from this subpicosecond transient absorption study, by using selective excitation (663, 669, 672, 678, and 682 nm) of various Chl a absorption bands and detecting the induced changes over the entire Q(y) region (650 -700 nm). It is shown that transfer from the pigment(s) absorbing around 663 nm to the low energy ones occurs in 5 +/- 1 ps, whereas the 670-nm excitation is delivered to the s...
A semi-empirical analysis of dye adsorption and electron transport in dye sensitized solar cells (DSSCs) Ameri, Mohsen; Samavat, Feridoun; Mohajerani, Ezeddin (2015-01-01) In order to provide a comprehensive understanding of dye adsorption parameters and their relation with the structural and transport properties of dye sensitized solar cells (DSSCs), a combination of experiments and modeling of the dye adsorption and electron transport characteristics with respect to the photoanode thickness was performed. The obtained experimental data include scanning electron microscopy (SEM) images, UV-Vis data, steady state current-voltage (J-V) characteristics and open circuit voltage ...

Citation Formats

U. Desnica et al., “The evolution of the morphology of Ge nanocrystals formed by ion implantation in SiO2,” NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, pp. 272–275, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32950.