A5013235884- Advanced Electron Microscopy Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Surface and Thin Film Phenomena
- Electronic and Structural Properties of Oxides
- Force Microscopy Techniques and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Advanced Sensor and Energy Harvesting Materials
- Machine Learning in Materials Science
- Chalcogenide Semiconductor Thin Films
- Inorganic Chemistry and Materials
- Organic Electronics and Photovoltaics
- Ga2O3 and related materials
- Analytical Chemistry and Sensors
- Nanowire Synthesis and Applications
- Optical properties and cooling technologies in crystalline materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Microstructure and mechanical properties
- Metamaterials and Metasurfaces Applications
- Magnetic properties of thin films
- ZnO doping and properties
- Advancements in Battery Materials
- Molecular Junctions and Nanostructures
University of Antwerp
2015-2022
University of Groningen
2013
Colloidal CsPbX3 (X = Br, Cl, and I) perovskite nanocrystals (NCs) have emerged as promising phosphors solar cell materials due to their remarkable optoelectronic properties. These properties can be tailored by not only controlling the size shape of NCs but also postsynthetic composition tuning through topotactic anion exchange. In contrast, property control cation exchange is still underdeveloped for colloidal NCs. Here, we present a method that allows partial in CsPbBr3 NCs, whereby Pb2+...
The recent revival of the Na-ion battery concept has prompted intense activities in search for new Na-based layered oxide positive electrodes. largest capacity to date was obtained a Na-deficient that relies on cationic redox processes only. To go beyond this limit, we decided chemically manipulate these compounds way trigger participation anionic network. We herein report electrochemical properties Na-rich phase Na2IrO3, which can reversibly cycle 1.5 Na+ per formula unit while not...
This paper demonstrates the emergence of topologically non-trivial bands in an ultrathin ferromagnet. The resulting competition between with opposite Berry phases is theoretically and experimentally shown to be tunable, by creating interfaces other materials.
The development of new nanocrystals with outstanding physicochemical properties requires a full three-dimensional (3D) characterization at the atomic scale. For homogeneous nanocrystals, counting number atoms in each column from high angle annular dark field scanning transmission electron microscopy images has been shown to be successful technique get access this 3D information. However, technologically important nanostructures often consist more than one chemical element. In order extend...
We present a study of the relation between surface chemistry and nanocrystal shape PbSe nanocrystals with variable Pb-to-Se stoichiometry density oleate ligands. The ligand binding configuration are monitored by nuclear magnetic resonance Fourier transform infrared absorbance spectroscopy, allowing us to quantify number surface-attached ligands per NC nature surface-Pb-oleate configuration. three-dimensional is obtained from high-angle annular dark field scanning transmission electron...
Abstract Nano-sized gold has become an important material in various fields of science and technology, where control over the size crystallography is desired to tailor functionality. Gold crystallizes face-centered cubic ( fcc ) phase, its hexagonal closed packed hcp structure a very unusual rare phase. Stable Au phase been reported form nanoparticles at tips some Ge nanowires. It also recently synthesized thin graphene-supported sheets which are unstable under electron beam irradiation....
The effect of hypochlorite treatment on the layer thickness and conductivity a state-of-the-art high conducting poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is investigated as function exposure time concentration. Because overoxidation by PEDOT:PSS decreased 10 orders magnitude. Comparison shows that residual insulating remains substrate upon treatment. Going from low (<0.01%) to (>0.1%) concentration interaction between changes reaction- diffusion limited. decrease...
A new methodology is presented to count the number of atoms in multimetallic nanocrystals by combining energy dispersive X-ray spectroscopy (EDX) and high angle annular dark field scanning transmission electron microscopy (HAADF STEM). For this purpose, existence a linear relationship between incoherent HAADF STEM EDX images exploited. Next for each element atomic columns, method also allows quantification error obtained atoms, which importance given noisy nature acquired signals. Using...
Abstract The fabrication of 2D systems for electronic devices is not straightforward, with top‐down low‐yield methods often employed leading to irregular nanostructures and lower quality devices. Here, a simple reproducible method trigger self‐assembly arrays high aspect‐ratio chiral copper heterostructures templated by the structural anisotropy in black phosphorus (BP) nanosheets presented. Using quantitative atomic resolution aberration‐corrected scanning transmission electron microscopy...
Over the last decade, scanning transmission electron microscopy has become one of most powerful tools to characterise nanomaterials at atomic scale. Often, ultimate goal is retrieve three-dimensional structure, which very challenging since small species are typically sensitive irradiation. Nevertheless, measuring individual positions crucial understand relation between structure and physicochemical properties these (nano)materials. In this review, we highlight latest approaches that...
Heterostructures formed by La0.7Sr0.3MnO3/ZnO (LSMO/ZnO) interfaces exhibit extremely interesting electronic properties making them promising candidates for novel oxide p-n junctions, with multifunctional features. In this work, the structure of interface is studied through a combined experimental/theoretical approach. were grown epitaxially and homogeneously on 4″ silicon wafers, characterized advanced electron microscopy imaging spectroscopy simulated ab initio density functional theory...
An efficient model-based estimation algorithm is introduced in order to quantify the atomic column positions and intensities from resolution (scanning) transmission electron microscopy ((S)TEM) images. This uses least squares estimator on image segments containing individual columns fully accounting for overlap between neighbouring columns, enabling analysis of a large field view. For this algorithm, accuracy precision with which measurements scattering cross-sections annular dark (ADF) STEM...