A5002032821- Granular flow and fluidized beds
- nanoparticles nucleation surface interactions
- Minerals Flotation and Separation Techniques
- Pickering emulsions and particle stabilization
- Force Microscopy Techniques and Applications
- Particle Dynamics in Fluid Flows
- Laser-Ablation Synthesis of Nanoparticles
- Adhesion, Friction, and Surface Interactions
- TiO2 Photocatalysis and Solar Cells
- Diamond and Carbon-based Materials Research
- Material Dynamics and Properties
- Electrohydrodynamics and Fluid Dynamics
- Mineral Processing and Grinding
- Gold and Silver Nanoparticles Synthesis and Applications
- Field-Flow Fractionation Techniques
- Fluid Dynamics and Heat Transfer
- Ga2O3 and related materials
- Ion-surface interactions and analysis
- Composite Material Mechanics
- Microfluidic and Bio-sensing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Mining and Gasification Technologies
- Coagulation and Flocculation Studies
- Near-Field Optical Microscopy
- Nanoparticles: synthesis and applications
FH Münster
2022-2025
Delft University of Technology
2016-2020
Saint-Gobain (Germany)
2020
University of Bremen
2012-2019
KU Leuven
2018
Leibniz-Institut für Werkstofforientierte Technologien - IWT
2018
Institute of Process Engineering
2017
An active pull on particles undergoing Brownian motion in particle-cluster aggregation leads to more open structures. Aggregates formed under these conditions are shown have lower fractal dimensions and densities.
Fundamental knowledge about the mechanisms of adhesion between oxide particles with diameters few nanometers is impeded by difficulties associated direct measurements contact forces at such a small size scale. Here we develop strategy based on AFM force spectroscopy combined all-atom molecular dynamics simulations to quantify and explain nature 10 nm TiO(2) nanoparticles. The method statistical analysis peaks measured in repeated approaching/retracting loops an cantilever into film...
Interparticle forces govern the mechanical behavior of granular matter and direct hierarchical assembling nanoparticles into supramolecular structures. Understanding how these change under different ambient conditions would directly benefit industrial-scale nanoparticle processing units such as filtering fluidization. Here we rationalize quantify contributions dispersion, capillary, solvation between hydrophilic TiO2 with sub-10 nm diameter show that humidity dependence interparticle is...
Abstract Dielectrophoresis (DEP) is a versatile technique for the solution of difficult (bio-)particle separation tasks based on size and material. Particle motion by DEP requires highly inhomogeneous electric field. Thus, throughput classical devices limited restrictions channel to achieve large enough gradients. Here, we investigate dielectrophoretic filtration, in which performance are decoupled because particles trapped at induced field maxima porous matrix. By simulating microfluidic...
Abstract The fluidization of cohesive powders has been extensively researched over the years. When looking at literature on particles, one will often find papers concerned with only micro‐ or nano‐sized powders. It is, however, unclear whether they should be treated differently all. In this paper, we look differences and similarities between across size range several nanometres to 10s micrometres. Classification behaviour based particle was found troublesome since form agglomerates using...
Efficient nanopowder processing requires knowledge of the powder’s mechanical properties. Due to large surface area volume ratio, nanoparticles experience relatively strong attractive interactions, leading formation micron-size porous structures called agglomerates. Significant effort has been directed towards development models and experimental procedures estimate elasticity objects such as nanoparticle agglomerates; however, none existing validated for solid fractions below 0.1. Here, we...
A new two-step layer transfer process is introduced that capable of fabricating mechanically stabilized highly porous nanoparticle layers on various substrates. In a first step titanium dioxide nanoparticles were synthesized with Flame-Spray-Pyrolysis and accumulated filter paper in the gas phase. second this cake subsequently transferred to final substrate via low pressure lamination at room temperature. This leads mechanical restructuring stabilization layer. Pore size analysis indicates...
In this work we present a comprehensive experimental study to determine the contact forces between individual metal oxide nanoparticles in gas-phase using atomic force microscopy. addition, determined amount of physisorbed water for each type particle surface. By comparing our results with mathematical models interaction forces, could demonstrate that classical continuum van der Waals and capillary alone cannot sufficiently describe findings. Rather, discrete nature molecules has be...
Potassium doped titanium oxide (KTiO x nanowires were prepared by the wet corrosion process (WCP) and their photocatalytic effects systematically characterized.For synthesis of KTiO , potassium hydroxide concentration WCP was varied in order to obtain nanostructures with different surface area charge.Structural crystalline properties studied means X-ray diffraction, scanning transmission electron microscopy.Chemical composition determined fluorescence energy-dispersive...