A5006392693- Carbon Nanotubes in Composites
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Advancements in Battery Materials
- Semiconductor materials and devices
- Anodic Oxide Films and Nanostructures
- Nanowire Synthesis and Applications
- Smart Materials for Construction
- Laser-Ablation Synthesis of Nanoparticles
- Latin American Urban Studies
- Innovative Approaches in Technology and Social Development
- Semiconductor materials and interfaces
- Supercapacitor Materials and Fabrication
- Metal and Thin Film Mechanics
- Advanced Battery Materials and Technologies
- Gyrotron and Vacuum Electronics Research
- Urbanization and City Planning
- Analytical Chemistry and Sensors
- Nanotechnology research and applications
- Terahertz technology and applications
- Mechanical and Optical Resonators
- Silicon Nanostructures and Photoluminescence
- Advanced Battery Technologies Research
- Gas Sensing Nanomaterials and Sensors
- Laser-induced spectroscopy and plasma
Centre National de la Recherche Scientifique
2013-2025
Laboratoire de Physique des Interfaces et des Couches Minces
2015-2025
École Polytechnique
2013-2025
Université Sorbonne Nouvelle
2025
Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications
2024
Centre de Nanosciences et de Nanotechnologies
2023
Institut de Physique et Chimie des Matériaux de Strasbourg
2004-2021
Institut Polytechnique de Paris
2021
Université de Strasbourg
2018-2019
Université Paris-Saclay
2016-2018
Coexistence of both edge plane and basal in graphite often hinders the understanding lithium ion diffusion mechanism. In this report, two types graphene samples were prepared by chemical vapor deposition (CVD): (i) well-defined grown on Cu foil (ii) plane-enriched layers Ni film. Electrochemical performance electrode can be split into regimes depending number layers: corrosion-dominant regime lithiation-dominant regime. Li perpendicular to is facilitated defects, whereas parallel limited...
The concept of a hybrid nanostructured collector made thin vertically aligned carbon nanotubes (CNTs) decorated with Si nanoparticles provides high power density anodes in lithium-ion batteries. An impressive rate capability is achieved due to the efficient electronic conduction CNTs combined well defined electroactive nanoparticles: capacities 3000 mAh g−1 at 1.3C and 800 15C are achieved.
Iron is a widely used catalyst for the growth of carbon nanotubes (CNTs) or nanofibers (CNFs) by catalytic chemical vapor deposition. However, both Fe and Fe–C compounds (generally, Fe3C) have been found to catalyze CNTs/CNFs, comparison study their respective activities still missing. Furthermore, control crystal structure iron-based catalysts, that α-Fe Fe3C, challenge, which not only obscures our understanding mechanisms but also complicates subsequent procedures, such as removal...
Growth on transition metal substrates is becoming a method of choice to prepare large-area graphene foils. In the case nickel, where carbon has significant solubility, such growth process includes at least two elementary steps: (1) dissolution into metal, and (2) precipitation surface. Here, we dissolve calibrated amounts in nickel films, using ion implantation, annealing 725 \circ or 900 \circ. We then use transmission electron microscopy analyse detail: latter appears imply diffusion over...
The synthesis of few-layered graphene is performed by ion implantation carbon species in thin nickel films, followed high temperature annealing and quenching. Although enables a precise control the content uniformity in-plane concentration Ni films before annealing, we observe thickness non-uniformities synthesized layers after annealing. These are probably induced heterogeneous distribution/topography nucleation sites on surface. Taken altogether, our results indicate that number top...
In this study, we present a lead-free, piezoelectric energy harvester capable of generating power in the milliwatt range. The consists four layers polyvinylidene difluoride polymer, bonded to cantilever with tip mass. cantilever’s resonance frequency was measured at 13.4 Hz. are connected parallel, resulting total capacitance 27 nF. At resonance, under open-circuit conditions, generates nearly 90 Vpp when subjected an acceleration 1 g. When impedance is matched, maximum output reaches 2.4...
The effect of lithiation–delithiation rate and the number cycles on properties Si nanowires (SiNWs) electrolyte interface is presented in this paper. surface bulk modifications SiNW electrode induced by electrochemical process were investigated combined tests (galvanostatic cycling), field emission gun scanning electron microscopy, X-ray photoelectron spectroscopy, time-of-flight secondary ion mass spectrometry. Low improves performance due to a better penetration depth lithium into...
This contribution deals with all-printed infrared sensors fabricated using multiwalled carbon nanotubes deposited on a flexible polyimide substrate. A high responsivity of up to 1.2 kV/W is achieved at room temperature in ambient air. We evidence strong dependence the device transduction mechanism surrounding atmosphere, which can be attributed bolometric effect interference water molecule desorption upon irradiation.
Membrane-based synthesis, also called template is a very general approach used to prepare arrays of nanomaterials with monodispersed geometrical features. The most commonly porous templates are track-etched polycarbonate and anodic alumina membranes. Common all these the fact that pores perpendicular surface membrane. Here, novel presented, where synthesized parallel For first time, oxidation an aluminum thin film performed laterally, i.e., substrate, instead as usually done. low voltages...
This paper explores the field emission (FE) properties of highly crystalline Si nanowires (NWs) with controlled surface passivation. The NWs were batch-grown by vapor-liquid-solid process using Au catalysts no intentional doping. FE current-voltage characteristics showed quasi-ideal current saturation that resembles those predicted basic theory for from semiconductors, even at room temperature. In region, currents extremely sensitive to temperature and also increased linearly voltage drop...
High-performance optoelectronic devices based on cup-stacked carbon nanotubes are realized. Based a Schottky barrier model, rectifying behaviors and high photoresponse observed by using growth catalysts as nanoscale electronic contacts. Similar performances also obtained furthermore tuned the nanotube's defective surface effective decoration sites, transforming nanotube resistors into diodes.
We design a gas sensor by combining two SWCNT-FET devices in an inverter configuration enabling better system miniaturization together with reduction of power consumption and ease data processing.
Silicon-based anode fabrication with nanoscale structuration improves the energy density and life cycle of Li-ion batteries. As-synthesized silicon (Si) nanowires (NWs) or nanoparticles (NPs) directly on current collector represent a credible alternative to conventional graphite anodes. However, operating potentials these electrodes are below electrochemical stability window all electrolytes used in commercial systems. During first charging phase cell, partial decomposition electrolyte takes...
Lithium-sulfur technology garners significant interest due to sulfur's higher specific capacity, cost-effectiveness, and environmentally friendly aspects. However, insulating nature poor cycle life hinder practical application. To address this, a simple modification the traditional sulfur electrode configuration is implemented, aiming achieve high long life, rapid charge rates. Binder-free cathode materials are developed using vertically aligned carbon nanotubes (CNTs) decorated with lithium...