A5035085846- Liquid Crystal Research Advancements
- Pickering emulsions and particle stabilization
- Photonic Crystals and Applications
- Surfactants and Colloidal Systems
- Quantum Dots Synthesis And Properties
- Characterization and Applications of Magnetic Nanoparticles
- Diatoms and Algae Research
- Stochastic processes and statistical mechanics
- Gold and Silver Nanoparticles Synthesis and Applications
- Material Dynamics and Properties
- Advanced Materials and Mechanics
- Phase-change materials and chalcogenides
- Ocular Surface and Contact Lens
- Biocrusts and Microbial Ecology
- Non-Invasive Vital Sign Monitoring
- Nonlinear Dynamics and Pattern Formation
- Heart Rate Variability and Autonomic Control
- Electrowetting and Microfluidic Technologies
- Sleep and Work-Related Fatigue
- Theoretical and Computational Physics
Sorbonne Université
2020-2025
Electronic Concepts and Engineering (United States)
2025
Institut des NanoSciences de Paris
2020-2024
École Centrale d'Électronique
2022-2024
Centre National de la Recherche Scientifique
2020-2023
Chimie Moléculaire, Macromoléculaire, Matériaux
2014-2019
Laboratoire Charles Coulomb
2019
Université de Montpellier
2019
Tunis El Manar University
2015-2016
Tunis University
2015-2016
Smectic liquid crystals can be viewed as model systems for lamellar structures which there has been extensive theoretical development. We demonstrate that a nonlinear energy description is required with respect to the usual Landau-de Gennes elasticity in order explain observed layer spacing of highly curved smectic layers. Using x-ray diffraction we have quantitatively determined dilation bent layers distorted by antagonistic anchoring (as high 1.8% most layers) and accurately described it...
In this Letter, we show how advanced hierarchical structures of topological defects in the so-called smectic oily streaks can be used to sequentially transfer their geometrical features gold nanospheres. We use two kinds defects, 1D dislocations and 2D ribbon-like defects. The large trapping efficiency dislocation cores not only surpasses that elastically distorted zones around but also one defect. This enables formation a number aligned NP chains within quasi-fully filled without any...
New collective optical properties have emerged recently from organized and oriented arrays of closely packed semiconducting metallic nanoparticles (NPs). However, it is still challenging to obtain NP assemblies which are similar everywhere on a given sample and, most importantly, share unique common orientation that would guarantee behavior the sample. In this context, by combining microscopy, fluorescence microscopy synchrotron-based grazing incidence X-ray scattering (GISAXS) gold...
This research presents a machine learning modeling process for detecting mental fatigue using three physiological signals: electrodermal activity, electrocardiogram, and respiration. It follows the conventional pipeline, while emphasizing significant contribution of feature selection process, resulting in, not only high-performance model, but also relevant one. The employed considers both statistical contextual aspects relevance. Statistical relevance was assessed through variance...
Significance The coupling of capillarity and elasticity at liquid crystal interfaces is an emerging topic driven by the ability both mechanisms to guide self-assembly microparticles into ordered structures. In this research, we explore fundamental questions about how capillary deformations can affect texture around particles captured in thin nematic films. We report for first time, our knowledge, formation giant elastic dipoles develop a fuller understanding their creation. such...
We experimentally and theoretically study the variety of elastic deformations that appear when colloidal inclusions are embedded in thin wetting films a nematic liquid crystal with hybrid anchoring conditions. In thickest films, dipoles formed by particles their accompanying defects share features patterns commonly observed cells. When film gets thinner than size, however, capillary effects strongly modify appearance birefringence patterns. The influence thickness sizes on has been explored....
Smectic liquid crystals can be viewed as model systems for lamellar structures which there has been extensive theoretical development. We demonstrate that a nonlinear energy description is required with respect to the usual Landau-de Gennes elasticity in order explain observed layer spacing of highly curved smectic layers. Using X-ray diffraction we have quantitatively determined dilation bent layers distorted by antagonistic anchoring (as high 1.8% most layers) and accurately described it...
Controlled activation of the polarization single photon emitters is a challenge. We use CdSe/CdS dot-in-rods (DRs) confined and oriented in smectic topological grain boundaries to activate fluorescence through temperature variation. show that acts as knob switch on/off DR emitted light between isotropic phase. This occurs orientational motion assemblies, which induced phase due disappearing defects. In addition, we evidence significant improvement after cooling back from It measured by...