A5000718357- Magnetic and transport properties of perovskites and related materials
- Microfluidic and Capillary Electrophoresis Applications
- Advancements in Photolithography Techniques
- Advanced Condensed Matter Physics
- Microfluidic and Bio-sensing Technologies
- Electrowetting and Microfluidic Technologies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Electronic and Structural Properties of Oxides
- Advanced biosensing and bioanalysis techniques
- Nanopore and Nanochannel Transport Studies
- Metal and Thin Film Mechanics
- Electrochemical Analysis and Applications
- Nanofabrication and Lithography Techniques
- Multiferroics and related materials
- Advanced Surface Polishing Techniques
- Electrochemical sensors and biosensors
- Electron and X-Ray Spectroscopy Techniques
- Semiconductor materials and devices
- Biosensors and Analytical Detection
- Magnetic properties of thin films
- Optical Coatings and Gratings
- Copper Interconnects and Reliability
- Advanced X-ray Imaging Techniques
- ZnO doping and properties
- Magnetic Properties of Alloys
Centre de Nanosciences et de Nanotechnologies
2016-2024
Centre National de la Recherche Scientifique
2014-2023
Université Paris-Saclay
2016-2023
Laboratoire Photonique, Numérique et Nanosciences
2009-2018
Université Paris-Sud
2003-2018
3S Photonics (France)
2013-2014
University of Puerto Rico at Carolina
2014
Laboratoire de Cristallographie et Sciences des Matériaux
1999-2003
Laboratoire d'Étude des Microstructures
1989-2000
Arrays of plasmonic nanocavities with very low volumes, down to λ(3)/1000, have been fabricated by soft UV nanoimprint lithography. Nearly perfect omnidirectional absorption (3-70°) is demonstrated for the fundamental mode cavity (λ ≃ 1.15 μm). The second-order exhibits a sharper resonance strong angular dependence and total optical when critical coupling condition fulfilled (45-50°, λ 750 nm). It leads high refractive index sensitivity (405 nm/RIU) figure merit (∼21) offers new perspectives...
Herein we present a microfluidic-multiplexed platform that integrates electrochemical sensors based on carbon nanotubes associated with ferrocene as redox marker (carbon nanotube (CNT)/ferrocene) for direct detection of pathogenic viral DNA from Hepatitis C and genomic Mycobacterium tuberculosis in clinical isolates. By operating the fluidic device under high flow (150 μl/min), formation very thin depletion layer at sensor surface (δS = 230 nm) enhances capture rate up to one strand per...
The lattice deformation of dense strained La0.7Sr0.3MnO3 (LSMO) films is shown to control the easy direction magnetization. Optimized pulsed laser deposited conditions allow fabrication LSMO thin which present an exceptional flatness with a peak–valley roughness (Rp–v) 1 Å, associated epitaxial grains as large μm. Electron microscopy coupled x-ray diffraction have been used study unit cell distortion both tensile and compressive function thickness. No relaxation imposed by substrate has...
Tungsten films, 0.05–1 μm thick, were deposited on silicon wafers by rf magnetron sputtering. Induced film stresses investigated as a function of substrate temperature and background pressure in connection with microstructural observations limited compositional analysis. Homologous temperatures Ts/Tm, where Tm is the melting point tungsten (3683 K), ranged from 0.08 to 0.15. Argon pressures 1 7 Pa. This corresponds low-temperature part Thornton’s microstructure model, within zones I T. Two...
We report on the systematic investigation of electropreconcentration phenomena in hybrid micro/nanofluidic devices. The competition between electroosmotic dragging force and highly nonlinear electrophoretic forces induced by polarization effect is responsible for four preconcentration regimes within such structures that can arise at both cathodic anodic sides nanochannel. Numerical calculations spatiotemporal concentration charged molecules confirm a classification, showing general agreement...
A digital microfluidic dye laser that integrates a Fabry–Perot cavity with two fiber-based mirrors is shown to exhibit single mode emission. In addition, fast switching achieved via the alternation of droplet streams contain different dyes. Single-longitudinal-mode emission observed for each wavelength (at 565 and 586 nm) linewidth narrower than 0.12 nm. This system appears thus well suited on-chip spectroscopy flow cytometry.
An insulator to metal transition below 240K is induced by applying a 7T magnetic field in Pr0.5Ca0.5MnO3 thin films grown the Pulsed Laser Deposition technique on (100) SrTiO3 substrates. This value of melting field, much lower that one required bulk (20T), assumed be an effect tensile stress. These results confirm importance bandwidth control physical properties this compound and open route get colossal magnetoresistive using strain effects.
Thin films of the charge-ordered (CO) compound Pr$_{0.5}$Ca$_{0.5}$MnO$_{3}$ have been deposited onto (100)-oriented SrTiO$_{3}$ substrates using Pulsed Laser Deposition technique. Magnetization and transport properties are measured when thickness film is varied. While thinner do not exhibit any temperature induced insulator-metal transition under an applied magnetic field up to 9T, for larger than 1100\UNICODE{0xc5} a 5T sufficient melt CO state. For this latest film, we temperature-field...
Colossal magnetoresistive (CMR) La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ (LSMO) thin films have been grown under tensile strains on (100)-SrTiO$_{3}$ substrates and compressive (100)-LaAlO$_{3}$ (110)-NdGaO$_{3}$ by pulsed laser deposition. Using magnetic force microscopy (MFM), a "feather-like" pattern, characteristic of with an in-plane magnetization, is observed for deposited both SrTiO$_{3}$ NdGaO$_{3}$ while "bubble" typical out-of plane recorded LaAlO$_{3}$. We show that the shape pattern imaged...
Artificial (LaMnO3)m(SrMnO3)n superlattices, n/(m+n)=0.26, were grown with pulsed-laser deposition, and the superlattice period Λ was varied. Their structural characteristics investigated using x-ray diffraction electron microscopy. When Λ<ap (perovskite lattice parameter), bulk-like properties of La0.74Sr0.26MnO3 are obtained: TMI (metal-to-insulator transition temperature) ≈Tc (Curie ≈345 K −MR (magnetoresistance) ≈100%. Increasing (to 21 ap) leads to a decrease in Tc,...
Recent advances in large area graphene growth have led to tremendous applications a variety of areas. The nanomesh with its tunable band-gap is great interest for both fundamental research, explore the effect edges on 2D electrical conduction and electrochemical behavior, such as nanoelectronic devices or highly sensitive biosensors. Here, we report fabrication surface by nanoimprint lithography (NIL) produce controlled artificial edges. response this high quality single layer imprinted...
Forced convection decreases the diffusion layer thickness on microelectrode and promotes a faster DNA collection.
We investigate the preconcentration profiles of a fluorescein and bovine serum albumin derivatized with this fluorescent tag in microfluidic chip bearing nanoslit. A new method which hydrodynamic pressure is added to both electroosmotic electrophoretic contributions proposed monitor location frontline. simple predictive model pressure-assisted electropreconcentration for evolution flow profile along micro/nano/microfluidic structure. show small analyte such as that additional hydrostatic...
The remote manipulation of micro and nano-sized magnetic particles carrying molecules or biological entities over a chip surface is paramount importance for future on-chip applications in biology medicine. In this paper, we present method the demultiplexing individual using bifurcated nano-conduits propagation constrained domain walls (DWs). We demonstrate that controlled injection wall bifurcation allow capturing, transporting, sorting single particle between two predefined paths. cascade n...
We have developed and tested a novel microfluidic device for blood oxygenation, which exhibits large surface area of gas exchange can support long-term sustainable endothelialization microcapillaries, enhancing its hemocompatibility clinical applications. The architecture the parallel stacking trilayers is based on central injection lateral injection/output allows significant reduction in shear stress, promoting since cells be maintained viable up to 2 weeks after initial seeding...
In this study, we propose a strategy to explore the impact of proportion tris(2-carboxyethyl)phosphine (TCEP) and 6-mercaptohexanol (MCH) on efficiency oligonucleotide functionalization PDMS microfluidic channels equipped with pairs homemade microfabricated platinum microelectrodes. We identified an optimal concentration these compounds that enables effective orientation distribution probes, thereby facilitating subsequent target hybridization. The experiment included optimizing sample...
The growth of [101] epitaxial films Pr0.5Ca0.5MnO3 on LaAlO3 substrates has been achieved. structure, nanostructure, and magnetotransport properties are reported compared to those the bulk material. electron diffraction study evidences, at RT, a monoclinic cell with a≈c≈5.4 Å, b≈7.6 β≈91°. distortion is assumed be due strain effects. At 92 K, system extra reflections observed which implies an incommensurate modulated structure. component q modulation vector along a* ranges between 0.35 0.40....
A mask technology based on amorphous SiC membranes and stress minimized W Au absorbers has been developed to reach 100-nm critical linewidth pattern. Using low temperature techniques, plasma-enhanced chemical vapor deposition rf triode sputtering, very smooth large (45×45 mm2 with a surface roughness <5 nm) have produced. Two absorber technologies developed: gold electroplating in cyanide bath tungsten sputtering subsequent dry etching. Induced film stresses were investigated as...
Domain walls (DWs) in strongly correlated ferroics are expected to exhibit rich physical properties due the competition between ground states that exists these systems. A typical example is provided by ferromagnetic mixed-valence manganites for which insulating DWs an otherwise metallic phase have been predicted. Through magnetotransport experiments on a nanopatterned device we determined electronic of ${\mathrm{La}}_{2∕3}{\mathrm{Sr}}_{1∕3}\mathrm{Mn}{\mathrm{O}}_{3}$. We find DW...