A5065459052- Characterization and Applications of Magnetic Nanoparticles
- Nanoparticle-Based Drug Delivery
- Magnetic properties of thin films
- Magnetic Properties and Synthesis of Ferrites
- Magnetic Properties and Applications
- Microfluidic and Bio-sensing Technologies
- Magnetic and Electromagnetic Effects
- Magneto-Optical Properties and Applications
- Electromagnetic wave absorption materials
- Micro and Nano Robotics
- Electromagnetic Fields and Biological Effects
- Spaceflight effects on biology
- Geomagnetism and Paleomagnetism Studies
- Magnetic Field Sensors Techniques
- Sensor Technology and Measurement Systems
- Advanced MEMS and NEMS Technologies
- Theoretical and Computational Physics
- Block Copolymer Self-Assembly
- Optical Polarization and Ellipsometry
- Electrowetting and Microfluidic Technologies
- Copper Interconnects and Reliability
- Biofield Effects and Biophysics
- Surface Roughness and Optical Measurements
- Optical Coherence Tomography Applications
- Caveolin-1 and cellular processes
CEA Grenoble
2016-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2025
Institut polytechnique de Grenoble
2010-2025
Spintronique et Technologie des Composants
2016-2025
Université Grenoble Alpes
2010-2025
Centre National de la Recherche Scientifique
2010-2025
CEA LETI
2013-2025
Institut Nanosciences et Cryogénie
2010-2017
Université Joseph Fourier
2010-2013
Cancer cells develop resistance to chemotherapy, and the side effects encountered seriously limit effectiveness of treatments. For these reasons, search for alternative therapies that target cancer without affecting healthy tissues is currently one most active areas research on cancer. The present study focuses a recently proposed approach cell destruction based targeted triggering spontaneous death through mechanical vibration anisotropic magnetic micro/nanoparticles attached membranes at...
Magnetic nanoparticles are receiving an increasing interest for various biotechnological applications due to the capability that they offer exert actuation on biological species via external magnetic fields. In this study, two types of particles recently proposed cancer cells treatment were compared. Both prepared by top-down approaches and imitate properties superparamagnetic particles. One type is made a single layer has vortex configuration. The second multilayered structure called...
We report the observation of multiple permeability peaks for thin ferromagnetic films, in 10 MHz to 6 GHz range. This behavior is correlated with presence perpendicular anisotropy and stripe domains. Because much smaller than saturation magnetization layer, we propose an adaptation classical domain mode resonance model configuration oblique stripes.
Thin films of Yttrium Iron Garnet (YIG) are grown by radio frequency magnetron non reactive sputtering system. crystallised heat-treatment to obtain magneto-optical properties. On quartz substrate, the network cracks observed on annealed samples can be explained difference between thermal expansion coefficient substrate and YIG. The Faraday rotation thin is measured with a classical ellipsometric system based in transmission which allows us obtained an accuracy 0.01°. We studied variation...
Using a top-down approach, synthetic antiferromagnetic micro/nanoparticles usable for biological applications were prepared. These particles exhibit “superparamagneticlike” properties. Their magnetic susceptibility can be accurately controlled by the thickness of constituting layers. When dispersed in solution, striking differences their interactions are observed depending on susceptibility. Above threshold, phenomenon self-polarization is zero applied field, resulting gradual agglomeration...
Iron oxide nanoparticles have received remarkable attention in different applications. For biomedical applications, they need to possess suitable core size, acceptable hydrodynamic diameter, high saturation magnetization, and reduced toxicity. Our aim is control the synthesis parameters of nanostructured iron oxides order obtain magnetite a single step, environmentally friendly conditions, under inert gas atmosphere. The physical–chemical, structural, magnetic, biocompatible properties...
In the growing field of mechanobiology, artificial mechano‐reactive systems play an essential role in generation mechanical forces and control material deformations. Free‐standing magnetic nanoparticles have been studied for stimulation living cells. Magnetic composite materials are also used to mimic muscles at macroscale. this study, a new magnetically actuated membrane is focused, which can be various applications soft robotics or as bioreactor. It consists few microns thick...
The development of devices that combine a magnetic material with semiconductor chip is major focus current research. Barium hexaferrite (BaFe12O19 or BaM) thick films are deposited here using rf sputtering system. amorphous and nonmagnetic after deposition. Postdeposition thermal annealings employed to obtain properties. effects the substrate, annealing thickness BaM on properties studied vibrating sample magnetometer. initial results show good for two subtrates above 800 °C. close bulk (BaM) ones.
In nanomedicine, treatments based on physical mechanisms are more and investigated promising alternatives for challenging tumor therapy. One of these approaches, called magneto-mechanical treatment, consists in triggering cell death
Synthetic antiferromagnetic micro/nanoparticles usable for biological applications were recently developed using a top-down approach, made of alternating NiFe layers and non magnetic Ru spacers. We describe here different types motions particles chains, controlled either by field gradients or fields combination both. Of particular interest is displacement named “tumbling motion” consisting in rotation translation, with friction on the bottom surface container, as bicycle wheel horizontal...
Abstract Biofilm colonisation of surfaces is critical importance in various areas ranging from indwelling medical devices to industrial setups. Of particular the reduced susceptibility bacteria embedded a biofilm existing antimicrobial agents. In this paper, we demonstrate that remotely actuated magnetic cantilevers grafted on substrate act efficiently preventing bacterial formation. When exposed an alternating field, flexible vertically deflect their initial position periodically, with...
Diabetes is a major global health threat. Both academics and industry are striving to develop effective treatments for this disease. In work, we present new approach induce insulin release from β-islet pancreatic cells (INS-1E) by mechanical stimulation. Two types of experiments were carried out. First, local stimulation was performed dispersing anisotropic magnetic particles within the cell medium, which settled down almost immediately on plasma membranes. Application low frequency field...
Microfluxgate sensors have been developed to measure very low magnetic fields, of about some nanotesla. This paper describes a recent integrated solution coupled with the basic microfluxgate component. The objective is decrease noise level sensor down few nanotesla per square root hertz. technological consists adding coils or single layers, thanks which required ac transverse field can be applied. A large enhancement sensitivity put in evidence on output signal figures and without...
Abstract A new kind of nanodevice that acts like tweezers through remote actuation by an external magnetic field is designed. Such device meant to mechanically grab micrometric objects. The nanotweezers are built using a top-down approach and made two parallelepipedic microelements, at least one them being magnetic, bound flexible nanohinge. presence induces torque on the elements competes with elastic provided model established in order evaluate values balanced torques as function opening...
A new method for magnetic field mapping based on the optical response of organized dense arrays flexible cantilevers is explored. When subjected to stray a magnetized material, mobile parts deviate from their initial positions, which locally changes light reflectivity magneto-optical surface, thus allowing visualize lines. While final goal be able map and quantify non-uniform fields, calibrating testing device can done with uniform fields. Under field, assimilated magnetic-field-sensitive...
Optical responses of biocompatible nanostructured magneto-elastic membranes, magnetically actuated, were experimentally characterized and fitted using a magneto-mechanical optical model.