| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kasama, Takeshi
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2019Electron holographycitations
- 2018Optimal microstructural design for high thermal stability of pure FCC metals based on studying effect of twin boundaries character and network of grain boundariescitations
- 2018Optimal microstructural design for high thermal stability of pure FCC metals based on studying effect of twin boundaries character and network of grain boundariescitations
- 2018Probing the chemistry of adhesion between a 316L substrate and spin-on-glass coatingcitations
- 2018Mechanisms of Se(IV) Co-precipitation with Ferrihydrite at Acidic and Alkaline Conditions and Its Behavior during Agingcitations
- 2018Magnetically activated microcapsules as controlled release carriers for a liquid PDMS cross-linkercitations
- 2018Transformation of iron containing constituent intermetallic particles during hydrothermal treatment
- 2017Mechanical properties of multilayer Ni-Fe and Ni-Fe-Al2O3 nanocomposite coatingcitations
- 2017Mechanical properties of multilayer Ni-Fe and Ni-Fe-Al 2 O 3 nanocomposite coatingcitations
- 2016Origin of Spontaneous Core-Shell AIGaAs Nanowires Grown by Molecular Beam Epitaxycitations
- 2015Influence of aging products on tensile deformation behavior of Al-0.62 mass%Mg-0.32 mass%Si alloycitations
- 2014Interferometric methods for mapping static electric and magnetic fieldscitations
- 2014Transmission electron microscopy of unstained hybrid Au nanoparticles capped with PPAA (plasma-poly-allylamine):Structure and electron irradiation effectscitations
- 2014Transmission electron microscopy of unstained hybrid Au nanoparticles capped with PPAA (plasma-poly-allylamine)citations
- 2014Off-axis electron holography of ferromagnetic multilayer nanowirescitations
- 20143D visualization of TiO2 nanocrystals in mesoporous nanocomposite using energy filtered transmission electron microscopy tomographycitations
- 2014Towards quantitative off-axis electron holographic mapping of the electric field around the tip of a sharp biased metallic needlecitations
- 2014Magnetic characterization of synthetic titanomagnetites: quantifying the recording fidelity of ideal synthetic analogscitations
- 2013Ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition. Part I: electron holography and Lorentz microscopycitations
- 2013Oxidation of Dodecanoate Intercalated Iron(II)–Iron(III) Layered Double Hydroxide to Form 2D Iron(III) (Hydr)oxide Layerscitations
- 2013Ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transition: Part II. Micromagnetic and image simulationscitations
- 2011Formation process and superparamagnetic properties of (Mn,Ga)As nanocrystals in GaAs fabricated by annealing of (Ga,Mn)As layers with low Mn content
- 2011Formation process and superparamagnetic properties of (Mn,Ga)As nanocrystals in GaAs fabricated by annealing of (Ga,Mn)As layers with low Mn contentcitations
- 2011Spin reorientation in α-Fe2O3 nanoparticles induced by interparticle exchange interactions in alpha-Fe2O3/NiO nanocompositescitations
- 2011Voids and Mn-rich inclusions in a (Ga,Mn)As ferromagnetic semiconductor investigated by transmission electron microscopycitations
- 2010Direct observation of ferrimagnetic/ferroelastic domain interactions in magnetite below the Verwey transitioncitations
- 2010Interpretation of electron beam induced charging of oxide layers in a transistor studied using electron holographycitations
- 2010Nonadiabatic Spin Torque Investigated Using Thermally Activated Magnetic Domain Wall Dynamicscitations
- 2006Periodic inclusion of room-temperature-ferromagnetic metal phosphide nanoparticles in carbon nanotubescitations
Places of action
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article
Origin of Spontaneous Core-Shell AIGaAs Nanowires Grown by Molecular Beam Epitaxy
Abstract
Based on the high-angle annular dark-field scanning transmission electron microscopy and energy dispersive X-ray spectroscopy studies, we unravel the origin of spontaneous core shell AlGaAs nanowires grown by gold-assisted molecular beam epitaxy. Our AlGaAs nanowires have a cylindrical core and a tapered shell. The composition of the shell is close to nominal, while the aluminum content in the core is systematically smaller than nominal. After switching off the group III fluxes, the aluminum content in the droplet and in the topmost part of the nanowire rapidly tends to zero, while gallium remains there at a high percentage. We present a quantitative model to explain these findings. Lower aluminum composition in the core is attributed to its lower surface diffusivity, with the aluminum collection length of 250 nm against 780 nm for gallium at the substrate temperature 510 degrees C and under the nominal aluminum content of 0.2. These values decrease to 8 and 160 nm when the nominal aluminum content is raised to 0.6. On the other hand, aluminum leaves the droplet at least 100 times faster than gallium, with a typical bonding rate with arsenic on the order of 1000 nm/s.