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Nanostructure evolution in oxide materials at high temperature investigated with advanced X-ray scattering and machine learning based data analysis
The NanOX-ML project focuses on the understanding of the coupling between phase transitions, local compositional fluctuations and microstrain distributions in dense nanostructured oxide polycrystals subjected to very high temperature thermal loading. During their elaboration, or during their use, th
Plasmon-assisted manipulation of spin dynamics with light – reaching the terahertz regime
The vividly developing field of plasmonics aims - among others - to explore surface plasmon resonance related phenomena in plasmonic nanocrystals (NCs) and their potential applications. State-of-the-art chemical methods allow design and fabrication of the NCs and their 2D assemblies with tailored sp
Nanoporous Silicon-Elastomer Hybrids: From Liquid-Crystalline Functionalization to a Tunable Elasticity Assessed by Laser Ultrasonics
Nanoporosity in silicon leads to completely new functionalities of this mainstream semiconductor in numerous fields ranging from nanofluidics and biosensorics to drug delivery, energy storage and photonics. However, a difficult to assess elasticity significantly limited its mechanical exploration an
Imaging the Photo-Excited Electronic States at the Molecular Scale
Since the late twentieth century, atomic force microscopy in non-contact mode (nc-AFM) has proven its strength for the study of molecular self-assemblies and single molecules in ultimate picometer scale resolution. Ever-increasing advances in combining nc-AFM with its electrostatic mode led to the v
Electrostatic doping of 2D semiconductors on Gallium Nitride based heterostructures
2DonGaN proposes a new solution to efficiently dope 2D semiconductors (SC) grown on III-V heterostructures (e.g. AlGaN/GaN). Depending on the stack, these heterostructures induce spontaneous and piezoelectric polarizations that generate fixed positive or negative charges at their surface. These char
Engineering Magnetic Properties of Two-Dimensional MXenes
MXenes are widely recognized as one of the fastest growing areas in 2D materials research due to their exceptional physical and structural properties and great promise for various applications, including spintronics and magnetic sensors. Yet, the experimental efforts towards their magnetism remain v
1D optoelectronic NAno devices from ChRomophore confinement into Individual nanotubes
In this project, our challenge is to study for the first time at a fundamental level the optoelectronic properties of hybrid individual nano-objects made of specifically-designed dyes composed of pi conjugated molecules confined inside index-identified semiconducting single walled carbon nanotubes.
MagNEtic eXchange with 2D maTerials
In magnetism, by combining interfacial interactions, such as exchange coupling, Dzyaloshinskii-Moriya interaction (DMI) and perpendicular interfacial magnetic anisotropy (PMA), various fascinating effects appear, which result in spin textures. In metallic thin films, chiral spin textures such as spi
Magnetic exchange interaction across a vacuum barrier at the single-atom scale
The decoration of a metal probe tip by a molecule intentionally picked up from a surface is a powerful method to improve the measurement capabilities of scanning probe microscopes. The proposal aims at generalizing the use of a molecular tip to explore surface magnetism at the atomic scale. Tips of
Engineering light-matter coupling in TMD-based optical microcavities: from free excitons to Moiré superlattices
Excitons in atomically-thin transition metal dichalcogenides (TMDs) display very large binding energies and oscillator strengths, and dominate their optical response. In the case of Moiré superlattices, formed by stacking two monolayers with different lattice parameters or rotating two lattices with
Colloidal Design of Active Metasurfaces
Many molecules of interest, such as DNA and proteins, show no absorption in the visible range, but have strong absorption and high refractive indices in the UV range. One of the main goals of UV plasmonics is to detect the adsorption of these molecules on a metal nanostructure, with a higher sensiti
Graphene nanoRibbons as Atomically controlled Light Sources
Since their first on-surface synthesis, atomically precise graphene nanoribbons (GNRs) have attracted tremendous interest in the nano-science and technology communities. Their optical properties in particular hold great promise towards robust and controllable atomically thin classical and quantum em
Strong coupling of non linear multiexcitonic emission to plasmons
The objective of this project is first to study the multiexcitonic radiative emission for individual colloidal nanocrystals (quantum dot) or nanoplatelets (quantum well) of II/VI semiconductors, then the coupling of this emission to surface plasmons. The aim of this project is to demonstrate, at roo
Disruptive Molecular Electronics via Nanoelectrochemistry
DEMOCRACY combines concepts from Nanoelectrochemistry with Molecular Electronics. Classical principles such as ion transport, redox reactions and porous electrodes developed for batteries and supercapacitors have distinct effects in nanoscale devices with dimensions < 20 nm. They are the foundation
Robust and Reusable plasmonic photoelectrochemical electrodes: individual nanoprobes in liquid phase
Environmental pollution causes irreparable damage to the natural environment and to human societies. In this context, we propose to develop a device allowing to detect in dynamic regime and with a high sensitivity polluting substances like heavy ions in liquid environment. The technology will be bas
Dislocations in layered carbon nanomaterials
Dislocated layered materials are fundamentally different to their non-dislocated equivalent. For example, screw dislocations in multiple graphene layers convert them into a single continuous helical sheet, allowing c-axis thermal and electrical conduction; both edge and screw dislocations block inte
Surfaces and interfaces of novel perovskites and perovskitoids.
SURFaces and Interfaces of Novel perovskites and perovskitoids (SURFIN) aims at setting up an ab initio study of the structural and electronic properties of surfaces and interfaces, which are known to be critical for the performance of photo-active materials and the charge carrier transport across o
A Coordination Chemistry Approach to Understanding Chirality Induced Spin-Selection
Spintronics offer many avenues for the development of new devices with ultra-low energy consumption. Over the last decade, a new phenomenon named Chirality Induced Spin-Selection (CISS), has stirred a considerable amount of interest from physicists and chemists alike, due to its potential to generat
Nano-patterning of n-acenes thin films for their integration into future organic devices
The scientific objective of MOBInACENE is to master the crystalline structure of n-acenes thin films in order to control their electronic properties (charge carrier mobility). N-acenes (with n> 5), are molecules that might exhibit high charge transport properties compared to those of short acenes (
Controlled organisation of magnetic nanoparticles on 2D materials for innovative transport properties
While the spintronic properties of graphene may be engineered by proximity effects, the use of magnetic conducting substrates or capping layers is not adapted for next generation lateral spintronic devices. Spin-polarized currents and magnetoresistance signals in graphene can also be influenced by t
Combining Quantum Dots with NHC as Exciton Delocalizing Ligands for Boosting their Photocatalytic Activity
Quantum Dots (QDs) have emerged as promising candidates for applications in photocatalysis thanks to their intense and tunable absorption in the visible range, associated with wide quantum confinement-enhanced redox potentials and low photobleaching. Since 2015, the complexity and variety of reporte
CHIral spin FilTers for 2D-based Spintronics
CHIFTS is an exploratory project aiming at investigating the potential of chiral materials as spin filters for electrical spin injection into 2D Transition Metal Dichalcogenide (TMDs). Those chiral materials allow for efficient spin filtering with an out of plane spin polarization which is a key ass
Stability and reactivity of Sulfur Confined in Nanoporous Materials
The objective of StaRS is to provide new insights into sulfur confinement in nanoporous materials in order to synthesize new sulfur-based nanocomposites for gas adsorption applications. Our main research hypothesis relies on the allotropy of bulk sulfur that is expected to be recovered in a nano
Molecular Nanotubes of Single-Chain Magnets for Molecular-based Magnetic Devices
The project NANOCHAINS proposes to gain fundamental knowledge about the possibility to built efficient molecular-based magnetic materials for data storage. Indeed, the data storage energy consumption is targeted to represent 8% of global greenhouse gas emission in 2030 and new and more efficient dat
Quantum Well States for Sensing Hidden Magnetic Nanostructures
The objective of the QWellMagNa project is to study magnetic nanostructures embedded in metallic matrixes. The originality of the project is twofold: on one hand it is based on the use of spectroscopic properties of quantum wells (QW) formed between the magnetic particles and the surface, on the oth
The Nanoworld of Lasing Semiconductor Nanowires revealed by Ultrafast Transmission Electron Microscopy
Semiconductor nanowire lasers are promising nanoscale components for technological breakthroughs in quantum computation, communication, and bio-sensing. They are cheap, require low energy, and can be tailored to specific applications by tuning the wire dimensions and material. Their lasing propertie
Heat confinement in prussian blue core-shell nanoparticles for photothermal action
The concept of “hot nano-spots” consists in the creation of a very localized heating in the corona of inorganic nanoparticles submitted under external stimuli in some particular conditions. This phenomenon permitting the assimilation of the nanoparticles to “hot nano-spots” in a cold environment has
Topological Materials for Magnetic Memories
TopMemo project aims at studying the interactions between a Topological Insulator (TI) and a Magnetic Layer (ML) for the next generation of magnetic random-access memories (MRAM). MRAMs are non-volatile and non-destructive read out memories, and one of the best candidates for addressing the replacem
ChirAl PlasmOnic Nano-structures as Enantioselective photocatalysts
In view of the increasing demand for fine chemicals in many industrial sectors such as pharmacology or agrochemistry, the development of enantioselective chemistry is of paramount importance. Chiral separation is nowadays the industrial strategy of choice, while asymmetric catalysis is the best appr
Sensing With A Gap-Plasmon
Gap plasmon resonators are the smallest optical cavities currently feasible. They are fabricated using metallic nanocubes which are coupled to a metallic surface. The cross section of this kind of resonators is very large, which is an important advantage in the context of molecules sensing. These st
Lead-free halide perovskites encapsulated in nanoporous matrices for CO2 photoreduction
The project aims to create novel nanocomposites based on nanocrystals and nanoclusters of metal halide perovskites encapsulated in ordered mesoporous silica and zeolites. These eco-friendly lead-free materials based on tin and bismuth perovskites are expected to have high stability and excellent opt
Frozen DNA origami superlattice to facilitate Cryo-EM imaging of membrane proteins
DNA origami nanotechnology, which uses the self-assembly of DNA molecules, has become a technique of choice to rationally design nanostructures of complex geometry. In this project, we propose to use DNA origami to develop a new method that helps to circumvent the limitations of sample preparation i
Artificial Intelligence design and synthesis of nanoparticles and nanoMaterials
Silicon (Si) cores coated with a thin shell (=10 nm) of a metallic coating (Au or Ag) are interesting for optical applications, particularly if they can be organized into metasurfaces. The strong magnetic dipole resonance of the silicon particle can be coupled to the electric dipole resonance of the
Interfacing insect biomaterials with nanonet-FETs for electronic nose applications
Artificial odour detection is a complex action due to the large number of ligands, often molecularly related, and present in small quantities in an environment with frequently varying pressure and humidity. To achieve this objective, the Bac4Nose project relies on the combination of three interdisci
Janus "Nano-Tapes" as Glucose-Responsive Adhesive for Cells and Organoids Culture
Culture and differentiation of human pluripotent stem cells (PSC) to produce mini-organs (a.k.a. organoids) and human tissue is a complex process with many challenges, notably, the replacement of matrices from animal origin (such as Matrigel®) that are commonly used for organoid culture and a good a
Self-organization of thin films with molecular machine learning
The goal of the ASTAMO project is to create and optimize by statistical learning (machine learning) a molecular self-organization in order to realize the control of nanophotonic structures on the surface. The project will finally allow the implementation of a metaphotonic process on the surface thro
Smart Optoelectronic Ferroelectric Interfaces for Neuromorphic Electronics
The SOFIANE project targets the fabrication and fundamental study of wafer-scale semiconductor/ferroelectric van der Waals hybrids (vdW) , and their implementation into multi-functional neuromorphic devices. We combine the unique electronic properties of 2D semiconductors (surface-exposed 2D elect
2D van der WAALs layeRs for sub-picosecond UltraSonics
Picosecond laser ultrasonics is a well-recognized technique for non-invasive, high-resolution, structural characterization of materials and tissues at a sub-micron scale. It relies on the use of thin films as two-dimensional (2D) transducers, allowing launching and detection of acoustic coherent wav
Multifunctional Nanostructured Biobased Active Food Packaging with antimicrobial properties
Innovations in food packaging mostly concern food shelf-life and consumer safety by the inhibition or prevention of microbial growth onto food, thanks to the development of antimicrobial active packaging. In particular, bio-based biodegradable polymers and antimicrobial natural compounds generate a
Dipolar relaxation on-demand in nanoparticle-polypeptide hybrid materials
The DINAPO project aims at combining nanoparticles (NPs) and peptidic polymers to form hybrid materials, structured at the nanoscale, tuned by the nature of the building blocks and responsive to external stimuli (electrical, mechanical and optical). Our ambition is to couple the intrinsic functional
Next-gen multi-material devices: designing of nanostructured Cu-Mo composites
Recently, many efforts have been devoted to nanometric metallic multomposed of immiscible metals, present a unique combination of high thermal and electrical conductivity and low coefficieilayers (NMMs) because of their outstanding properties related to the individual components and number of interf