| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Kadkhodazadeh, Shima
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2022Photo-stimulated hydrogen desorption from magnesium nanoparticlescitations
- 2022Photo-stimulated hydrogen desorption from magnesium nanoparticlescitations
- 2022High resolution crystal orientation mapping of ultrathin films in SEM and TEMcitations
- 2022High resolution crystal orientation mapping of ultrathin films in SEM and TEMcitations
- 2021Initiation and Progression of Anisotropic Galvanic Replacement Reactions in a Single Ag Nanowire:Implications for Nanostructure Synthesiscitations
- 2021Initiation and Progression of Anisotropic Galvanic Replacement Reactions in a Single Ag Nanowirecitations
- 2020Aminopropylsilatrane Linkers for Easy and Fast Fabrication of High-Quality 10 nm Thick Gold Films on SiO2 Substratescitations
- 2020Optical and electronic properties of low-density InAs/InP quantum-dot-like structures designed for single-photon emitters at telecom wavelengthscitations
- 2020Aminopropylsilatrane Linkers for Easy and Fast Fabrication of High-Quality 10 nm Thick Gold Films on SiO 2 Substratescitations
- 2019Rationally Designed PdAuCu Ternary Alloy Nanoparticles for Intrinsically Deactivation-Resistant Ultrafast Plasmonic Hydrogen Sensingcitations
- 2019Metal-polymer hybrid nanomaterials for plasmonic ultrafast hydrogen detectioncitations
- 2019Metal-polymer hybrid nanomaterials for plasmonic ultrafast hydrogen detectioncitations
- 2019Optical property – composition correlation in noble metal alloy nanoparticles studied with EELScitations
- 2018Probing the chemistry of adhesion between a 316L substrate and spin-on-glass coatingcitations
- 2017The substrate effect in electron energy-loss spectroscopy of localized surface plasmons in gold and silver nanoparticlescitations
- 2017The substrate effect in electron energy-loss spectroscopy of localized surface plasmons in gold and silver nanoparticlescitations
- 2017Interfacial Interaction of Oxidatively Cured Hydrogen Silsesquioxane Spin-On-Glass Enamel with Stainless Steel Substratecitations
- 2017Broadband infrared absorption enhancement by electroless-deposited silver nanoparticlescitations
- 2014New amorphous interface for precipitate nitrides in steelcitations
- 2013Electron Energy Loss and One- and Two-Photon Excited SERS Probing of “Hot” Plasmonic Silver Nanoaggregatescitations
- 2011Towards quantitative three-dimensional characterisation of InAs quantum dots
- 2010Mapping boron in silicon solar cells using electron energy-loss spectroscopy
- 2010Mapping boron in silicon solar cells using electron energy-loss spectroscopy
Places of action
| Organizations | Location | People |
|---|
conferencepaper
Towards quantitative three-dimensional characterisation of InAs quantum dots
Abstract
InAs quantum dots (QDs) grown on InP or InGaAsP are used for optical communication applications operating in the 1.3 – 1.55 μm wavelength range. It is generally understood that the optical properties of such QDs are highly dependent on their three-dimensional structural and chemical profiles. Whilst conventional transmission electron microscopy (TEM) techniques can be used to study capped QDs in plan-view or cross-sectional geometries, the resulting images can provide ambiguous information about their three-dimensional properties. Here, we describe an approach for investigating the applicability of both high-angle annular dark-field (HAADF) scanning transmission electron microscopy (STEM) tomography and atom probe tomography (APT) to the study of surface and buried InAs/InGaAsP QDs grown by metal organic vapour phase epitaxy (MOVPE). Electron tomography was carried out in an FEI Titan TEM instrument operated at 300 kV. TEM specimens were prepared in plan-view geometry using mechanical grinding, polishing and Ar ion milling. Both original HAADF STEM images and final tomographic reconstruction of surface QDs suggest an elongated hexagonal shape for the bases of the QDs (Figure 1). The elongation direction was determined to be [110], using selected area electron diffraction and atomic force microscopy. The HAADF STEM images also suggest that surface QDs have a double-terraced geometry, with steeper facets around their bases and shallower facets close to their tops. This geometry is consistent with a theoretical model of InAs QDs formed on an InGaAs substrate that is lattice matched to InP [1] shown in Figure 1(b). Despite the large inner detector semi-angle used (approximately 50 mrad), strong diffraction effects were present in the original tilt series of HAADF STEM images, resulting in departure from the projection requirement for electron tomography, which states that the recorded intensity should be a monotonic function of a property of the object [2]. These diffraction effects are likely to be associated with ...