Search
Functional hybrid organic-inorganic nanohelices: studies of exalted phenomena at nanometric scale – nanosprings
Helical nanosprings represent a new variety of nanostructures which have attracted great attention in nanotechnology and nanoscience over the past decade. One decisive advantage of helices or twisted ribbons, compared to 1D nanostructures such as nanotubes and nanowires, lies in the fact that 3D mor
Localized growth of heteromaterials by VLS transport for power electronic applications – V-LOC
The massive resort of the electrical energy at once through new systems ever more powerful but also thanks to incentives to use renewable sources (wind, solar, hybrid vehicles…) requires the use of power electronics devices even more performing and encourages the scientific community to explore new
Low phonon-energy glass ceramics with tunable and ultra wide absorption and emission bands for highly efficient frequency conversion – GCWEB
This is a basic research project aiming at the development of innovative glass ceramics with very low phonon energy for highly efficient frequency conversion with tunable and ultra wide absorption and emission bands. Materials for frequency conversion have been studied for decades and they are now
Non-equilibrium sonochemistry – NEQSON
The NEQSON project is focused on the fundamental research of sonoluminescence and sonochemistry to reach the highest yield of excited and/or ionized species during the cavitating event. The UV/Vis/NIR emission spectroscopy will be applied to investigate the excited neutral (noble gases, singlet oxyg
Photo-induced energy transfer in methylated DNA helices and its relevance to UV damage : an interactive theoretical-experimental study – DNAexciton
The objective of DNAexciton was to study how the UV energy is redistributed among the DNA bases (adenine, thymine, guanine, cytosine), altering their electronic structure, and determine configurations that are favorable to the specific reactions. In particular, we examined two classes of reactions,
Proton care and relay in bio-relevant proton-coupled electron transfers – TAKE CARE
The association between electron transfer and proton transfer (PCET) has a long experimental and theoretical history in chemistry and biochemistry. Indeed it occurs in many electron transfer reactions, in radical chemistry and also plays a critical role in a wide range of biological processes, inclu
Exploration of the chemistry of At(III) in solution. Towards new labelling approaches in nuclear medicine? – EXCAT3
The principle of targeted alpha-particle therapy is to vectorize the radioactive isotope towards the tumor and destroy it using the particles emitted during the decay of the radioactive nucleus. The radioactive isotope 211 of astatine is potentially interesting due to its favorable physical properti
NMR Crystallography from Protons – NMR-X
Structure activity relationships are at the heart of modern chemical sciences. For example most rational drug design strategies used in the pharmaceutical industry take knowledge of the three dimensional structure of a target protein (Wüthrich, Nobel Prize 2002) and the interaction site of candidate
Supramolecular adhesion – Supradhésion
Supramolecular chemistry consists in using non-covalent interactions to organize molecules at the nanometer scale. A careful control of the structure can in turn be expected to yield improved properties. It was shown that it is actually possible to improve the mechanical properties of a polymer netw
New methods in mass spectrometry imaging for the study of the Alzheimer's disease – MASS-IMAGE
TOF-SIMS (Time-of-Flight Secondary Ion Mass Spectrometry) mass spectrometry imaging provides access to the chemical composition of the surface of a sample with an accuracy of one micron, without any a priori on the mapped species. The main objective of this project was to greatly improve with analy
Carbon nanotubes as nanoreators for Magnetic applications – CarMa
Carbon nanotubes are currently one of the most extensively studied nanomaterials because of their unique properties and their potential use in a number of strategic applications. Recently, confinement effects from the specific interaction of nano-objects with the walls of the nanotubes are the subje
MEcanism of Photochemistry at Interfaces : Study of Transient reactive Oxygen species – MEPHISTO
Photo-induced activation of oxygen in ambient air may contribute to chemical or bacteriological decontamination of various environmental media, particularly the air. Besides the well known combination of titanium dioxide and UV light, a strategy working in the visible region of the spectrum is to fi
Silyl Radicals for Polymer Science (Silicium) – Silicium
Les procédés de photopolymérisation connaissent un développement important avec des applications considérables dans le milieu industriel. L'étape d'amorçage photochimique, comparée aux procédés thermiques traditionnels, permet de réaliser une polymérisation extrêmement rapide (quelques secondes tout
Hydrothermal and Mechanical Stability of Soft Porous Crystals – SOFT-CRYSTAB
Soft Porous Crystals (SPC) are a fascinating sub-class of metal-organic frameworks (MOFs) exhibiting stimuli-responsive behavior, i.e. reversible changes of large amplitude under external stimulation. An important question, from the perspective of practical industrial-scale applications, is that of
Structure and Dynamics of Hydrogen Bonded Liquids – StruDynaL
Hydrogen bonded liquids, such as water and alcohols, are literally vital components of all biological systems, and essential in pharmaceuticals, food products, cryo-protection agents, microwave chemistry, and many technologically relevant materials. Many important features are linked to their strong
Advanced Materials for Optical Sensing – AMOS
This new technology deploys materials for remote sensors responding to specific atmosphere or temperature stimulation, activated and read at a distance. The stimulii change the optical response of the materials to irradiation with light. Specific surface area and surface morphology are thus importan
Towards Selective Photo-induced Reactivity of Individual single walled Carbon NanoTubes – SPRINT
The project aims at synthesizing and chemically modifying carbon nanotubes. To do so: - We are developping new methods for fabricating carbon nanotubes so as to control their characteristics, notably their diameter (10 000 to 25 000 times smaller than the diameter of one hair) and their metallic or
Biocatalytic activities of functionalized surfaces controlled by mechanical stimuli – BioStretch
Living systems are complex structures sensitive to stimuli coming from their microenvironment. Recently, many studies revealed the influence of mechanical stimuli on cell response. In particular, they focused on how cells induce cascades of signalisation and chemical responses through mechanosensing
Gas microbubbles decorated with gold or magnetite nanoparticles: composite objects for multi-scale investigation of magnetic, magneto-optical and optical responses. – AirDeco
Elaboration of spherical objects decorated with nanoparticles (NPs) is an important challenge for the development of new devices with potential in photonics, electronics, and for high performance information storage. A number of hard and soft microspheres have been used as templates to self-assemble
Two Photon Activable Photacid Generators for 3D Microfabrication – 2PAGmicroFab
Photoacid generators (PAGs) constitute an essential class of cationic photoinitiators in the field of photosensitive resins which are used for many applications all related to microfabrication (microelectronics, microfluidics, micromechanics…). The majority of photoacids that are commercialized are
Design of Nano structured functional Oxides – NanOxyDesign
In parallel to the development of nanotechnologies, the improvement of oxide functional properties through nanostructuration is gaining more and more importance. If nanocrystalline oxide materials have been studied for many years in forms of thin films in particular for integrated devices, thin film