A5028890718- Advanced MEMS and NEMS Technologies
- Acoustic Wave Resonator Technologies
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Nanowire Synthesis and Applications
- Mechanical and Optical Resonators
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Chemical Sensor Technologies
- Biosensors and Analytical Detection
- Microfluidic and Bio-sensing Technologies
- Silicon Nanostructures and Photoluminescence
- Radiation Effects in Electronics
- Photonic and Optical Devices
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Sensor and Energy Harvesting Materials
- Force Microscopy Techniques and Applications
- Nanofabrication and Lithography Techniques
- Advanced biosensing and bioanalysis techniques
- Sensor Technology and Measurement Systems
- Thin-Film Transistor Technologies
- Advanced Fiber Optic Sensors
- Magnetic Field Sensors Techniques
- Semiconductor materials and interfaces
- CCD and CMOS Imaging Sensors
University of Madras
2025
UCLouvain
2015-2024
Centre National de la Recherche Scientifique
2013-2020
Université Grenoble Alpes
2020
Institut polytechnique de Grenoble
2020
University of Sfax
2020
Hunan University
2019
Université de Sherbrooke
2013-2015
Hospital Intermutual de Levante
2015
Institut des Arts de Diffusion
2015
Time-resolved adsorption behavior of a human immunoglobin G (hIgG) protein on hydrophobized gold surface is investigated using multitechniques: quartz crystal microbalance/dissipation (QCM-D) technique; combined plasmon resonance (SPR) and Love mode acoustic wave (SAW) QCM-D atomic force microscopy (AFM) technique. The adsorbed hIgG forms interfacial structures varying in organization from submonolayer to multilayer. An "end-on" IgG orientation the monolayer film, associated with coverage...
We present a 16 × CMOS biosensor array aiming at impedance detection of whole-cell bacteria. Each 14 μm pixel comprises high-sensitive passivated microelectrodes connected to an innovative readout interface based on charge sharing principle for capacitance-to-voltage conversion and subthreshold gain stage boost the sensitivity. Fabricated in 0.25 process, capacitive was experimentally shown perform accurate dielectric measurements electrolyte up electrical conductivities 0.05 S/m, with...
The design of a porous silicon (PSi) biosensor is not often documented, but the upmost importance to optimize its performance. In this work, motivation behind choices PSi-based optical for indirect detection bacteria via their lysis detailed. transducer, based on PSi membrane, was characterized and models were built simulate analyte diffusion, depending nanostructures, properties. Once all performances properties analyzed optimized, theoretical response calculated. limit computed as 104...
Atomic-layer-deposited (ALD) aluminum oxide (Al2O3) has recently demonstrated an excellent surface passivation for both n- and p-type c-Si solar cells thanks to the presence of high negative fixed charges (Qf ~ 1012−1013 cm-2) in combination with a low density interface states (Dit). This paper investigates quality thin (15 nm) Al2O3 films deposited by two different techniques: plasma-enhanced atomic layer deposition (PE-ALD) Thermal (T-ALD). Other dielectric materials taken into account...
Neuromorphic computing, inspired by the brain's parallel and energy-efficient processing, offers a transformative approach to artificial intelligence. In this study, we fabricated optimized spin-transfer torque nano-oscillators (STNOs) investigated their dynamic behaviors using hybrid excitation scheme combining AC laser illumination DC bias currents. Laser-induced thermal gradients generate pulsed thermoelectric voltages ($V_{\text{AC}}$) via Tunnel Magneto-Seebeck (TMS) effect, while...
Preparation of new, stable and efficient electroactive nanocomposites for the fabrication an advanced supercapacitor device is a hot spot research arena owing to their huge demand in energy storage applications. In this study, spinel tin manganese oxide, SnMn2O4 (SMO) was prepared then on conjoining with multi-walled carbon nanotube (MWCNT), 3 types oxide fused (SnMn2O4@MWCNT) were by simple ultra-sonication process. The study forecasts that ultrasonication vital designing high storage....
Abstract Based on micro-Raman spectroscopy (μRS) and X-ray photoelectron (XPS), we study the structural damage incurred in monolayer (1L) few-layer (FL) graphene subjected to atomic-layer deposition of HfO 2 Al O 3 upon different oxygen plasma power levels. We evaluate level influence thickness graphene. The results indicate that case /graphene, whether 1L or FL is strongly damaged under our process conditions. For μRS analysis clearly shows less disordered than In addition, levels decrease...
To enable impedimetric sensing of whole-cell bacteria in a saline buffer with passivated microelectrodes, we designed very high frequency (up to 575 MHz) complementary meta-oxide-semiconductor (CMOS) oscillator connected on-chip Al/Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> interdigitated microelectrodes. The output was theoretically and experimentally shown be inversely...
A portable, non-invasive and easy to operate wireless system has been developed for monitoring the breathing activity of patient. The is composed a capacitive microsensor (airflow-humidity sensor) integrated on silicon chip Negative Temperature Coefficient thermistor; both are connected network allow efficient healthcare at home as well in hospitals. sensitive part an array interdigitated metallic electrodes covered by 100-nm-thick dense anodized aluminum oxide layer. breath water vapor...
The unique architecture of iridescent Morpho butterfly scales is known to exhibit different optical responses various vapours. However, the mechanism behind this phenomenon not fully quantitatively understood. This work reports on process developments in micro-fabrication a Morpho-inspired photonic structure atomic layer deposited (ALD) materials order investigate vapour sensitivity such artificial nanostructures. By developing recipes for dry and wet etching ALD oxides, we micro-fabricated...
In this work, we developed a biosensor for the indirect detection of bacteria via their lysate. The sensor is based on porous silicon membranes, which are known many attractive optical and physical properties. Unlike traditional biosensors, selectivity bioassay presented in work does not rely bio-probes attached to surface; added analyte itself, by addition lytic enzymes that target only desired bacteria. resulting bacterial lysate then able penetrate into membrane affects its properties,...
This paper presents the multifrequency responses of multielectromechanical piezoelectric bimorph beams using a novel analytical model based on closed-form boundary value method reduced from strong form Hamiltonian's principle. The constitutive dynamic equations for multiple connected in series, parallel, and mixed series-parallel connections can be further formulated Laplace transformation to give new formulas power harvesting response functions. parametric case studies change geometrical...
Naturally occurring photonic crystals present on the wing scales of Papilio butterflies are known to exhibit vivid iridescent coloration as well various optical properties, including vapor sensing properties. This work reports fabrication a periodic array concave multilayers in porous silicon mimicking blumei nanostructure and its application an sensor. We compared variations reflectance spectrum due ethanol adsorption condensation inside bio-inspired multilayer structure standard flat Bragg...
We present an innovative electrode design which uses multi-range electrokinetics with impedance spectroscopy, reaching a detection limit of 10<sup>5</sup> CFU mL<sup>−1</sup> bacteria.