Léon Abelmann
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View article: Comparison of the propulsion of helical microrobots based on hard- and soft-magnetic elements under rotating external magnetic fieldsv
Comparison of the propulsion of helical microrobots based on hard- and soft-magnetic elements under rotating external magnetic fieldsv Open
This study compares the propulsion of helical microrobots based on hard- and soft-magnetic elements under rotating magnetic fields. Results show that hard-magnetic microrobots achieved step-out frequencies and maximum propulsion speeds 4.5…
View article: Domain wall pinning and domain wall resistivity in notched <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>La</mml:mi><mml:mrow><mml:mn>0.7</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mrow><mml:mn>0.3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>MnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> nanostructures
Domain wall pinning and domain wall resistivity in notched nanostructures Open
Creation and manipulation of magnetic domain walls (DWs) are a core subject of research in developing prototype devices for spintronic applications. DWs can be created artificially and moved by applying either a magnetic field or an electr…
View article: Magnetoimpedance properties of CoNbZr, multilayer CoNbZr/Au and multilayer NiFe/Au thin films
Magnetoimpedance properties of CoNbZr, multilayer CoNbZr/Au and multilayer NiFe/Au thin films Open
Thin-film magnetic sensors using the giant magnetoimpedance (GMI) effect show great promise for sensitive low-field magnetic measurements. Optimising sensor performance requires a thorough understanding of the properties of various soft ma…
View article: Influence of thickness on magnetic properties of RF-sputtered amorphous CoNbZr thin films
Influence of thickness on magnetic properties of RF-sputtered amorphous CoNbZr thin films Open
Amorphous sputtered Co-based thin films are widely used as soft magnetic materials in applications such as sensors, inductors and magnetic flux concentrators. The magnetic properties of these films can be controlled by deposition parameter…
View article: Modeling the spatial resolution of magnetic solitons in Magnetic Force Microscopy and the effect on their sizes
Modeling the spatial resolution of magnetic solitons in Magnetic Force Microscopy and the effect on their sizes Open
In this work, we explored theoretically the spatial resolution of magnetic solitons and the variations of their sizes when subjected to a Magnetic Force Microscopy (MFM) measurement. Next to tip-sample separation, we considered reversal in…
View article: Permanent magnet systems to study the interaction between magnetic nanoparticles and cells in microslide channels
Permanent magnet systems to study the interaction between magnetic nanoparticles and cells in microslide channels Open
We optimized designs of permanent magnet systems to study the effect of magnetic nanoparticles on cell cultures in microslide channels. This produced two designs, one of which is based on a large cylindrical magnet that applies a uniform f…
View article: Magnetic Soft Helical Manipulators with Local Dipole Interactions for Flexibility and Forces
Magnetic Soft Helical Manipulators with Local Dipole Interactions for Flexibility and Forces Open
Magnetic continuum manipulators (MCMs) are a class of continuum robots that can be actuated without direct contact by an external magnetic field. MCMs operating in confined workspaces, such as those targeting medical applications, require …
View article: Asymptotic Homogenization in the Determination of Effective Intrinsic Magnetic Properties of Composites
Asymptotic Homogenization in the Determination of Effective Intrinsic Magnetic Properties of Composites Open
We present a computational framework for two-scale asymptotic homogenization to determine the intrinsic magnetic permeability of composites. To this end, considering linear magnetostatics, both vector and scalar potential formulations are …
View article: IRONSperm swimming by Rigid-Body Rotation Versus Transverse Bending Waves
IRONSperm swimming by Rigid-Body Rotation Versus Transverse Bending Waves Open
Cell membrane potential affects the electrostatic self-assembly of magnetizable nanoparticles around the flagellum of sperm cells, leading to the formation of biohybrid microrobots (i.e. IRONSperm) with various bending stiffness. Here we e…
View article: An open-source automated magnetic optical density meter for analysis of suspensions of magnetic cells and particles
An open-source automated magnetic optical density meter for analysis of suspensions of magnetic cells and particles Open
We present a spectrophotometer (optical density meter) combined with electromagnets dedicated to the analysis of suspensions of magnetotactic bacteria. The instrument can also be applied to suspensions of other magnetic cells and magnetic …
View article: Drug-Loaded IRONSperm clusters: modeling, wireless actuation, and ultrasound imaging
Drug-Loaded IRONSperm clusters: modeling, wireless actuation, and ultrasound imaging Open
Individual biohybrid microrobots have the potential to perform biomedical in vivo tasks such as remote-controlled drug and cell delivery and minimally invasive surgery. This work demonstrates the formation of biohybrid sperm-templated clus…
View article: Estimation of the Effective Magnetic Properties of Two-Phase Steels
Estimation of the Effective Magnetic Properties of Two-Phase Steels Open
We investigate the predictive performance of specific analytical and numerical methods to determine the effective magnetic properties of two-phase steels at the macroscale. We utilize various mixture rules reported in the literature for th…
View article: Inductive XY calibration method for multi-material fused filament fabrication 3D printers
Inductive XY calibration method for multi-material fused filament fabrication 3D printers Open
In this work an optical and inductive calibration procedures for calibrating multi-material fused filament fabrication 3D printers in the x and y directions is presented. The inductive calibration is based on the principle that the inducta…
View article: Multi-Axis Electric Stepper Motor
Multi-Axis Electric Stepper Motor Open
Multi-axis stepper motors offer a compact solution to actuate multiple degrees of freedom in a mechanical system by a single device. This research presents an electric stepper motor with three coaxial shafts driven by a single stator. The …
View article: An open-source automated magnetic optical density meter for analysis of suspensions of magnetic cells and particles
An open-source automated magnetic optical density meter for analysis of suspensions of magnetic cells and particles Open
We present a spectrophotometer (optical density meter) combined with electromagnets dedicated to the analysis of suspensions of magnetotactic bacteria. The instrument can also be applied to suspensions of other magnetic cells and magnetic …
View article: Performance and application of a simple automated Magnetic Optical Density meter for analysis of Magneto-tactic Bacteria
Performance and application of a simple automated Magnetic Optical Density meter for analysis of Magneto-tactic Bacteria Open
We present a photospectrometer (optical density meter) combined with electromagnets, dedicated for the analysis of magneto-tactic bacteria. We ensured that the system can be easily reproduced by keeping the complexity and price of the syst…
View article: Optimal Halbach Configuration for Flow-through Immunomagnetic CTC Enrichment
Optimal Halbach Configuration for Flow-through Immunomagnetic CTC Enrichment Open
Due to the low frequency of circulating tumor cells (CTC), the standard CellSearch method of enumeration and isolation using a single tube of blood is insufficient to measure treatment effects consistently, or to steer personalized therapy…
View article: Influence of the Distribution of the Properties of Permanent Magnets on the Field Homogeneity of Magnet Assemblies for Mobile NMR
Influence of the Distribution of the Properties of Permanent Magnets on the Field Homogeneity of Magnet Assemblies for Mobile NMR Open
We optimized the magnetic field homogeneity of two canonical designs for mobile microfluidic nuclear magnetic resonance (NMR) applications: two parallel magnets with an air gap and a modified Halbach array. Along with the influence of the …
View article: Influence of the distribution of the properties of permanent magnets on the field homogeneity of magnet assemblies for mobile NMR
Influence of the distribution of the properties of permanent magnets on the field homogeneity of magnet assemblies for mobile NMR Open
We optimised the magnetic field homogeneity of two canonical designs for mobile microfluidic NMR applications: two parallel magnets with an air gap and a modified Halbach array. Along with the influence of the sample length, general design…
View article: 3D Printing for Microgel-Based Liver Cell Encapsulation
3D Printing for Microgel-Based Liver Cell Encapsulation Open
In this work, we describe the rapid prototyping of a microfluidic device for the surfactant free encapsulation of human liver cells (HepG2 cell line) in gelatin microgels, for the purpose of 3D tissue mimics in high-throughput cytotoxicity…