Secretary: Ms. Clélie Lombard – +33 (0)3 26 05 07 50
Internet website : www.univ-reims.fr/lrn
For the staff, the laboratory is composed of 14 permanent faculties (7 Professors, 5 assistant/associate professors, 1 MD-PhD, 1 emeritus professor), 2 MDs and 6 technical staffs (2 research engineers, 2 engineers, 2 technical assistants).
For the non-permanent people, the numbers vary according to the years but turn around 8/9 PhD students, 3/4 postdoctoral fellows or research engineers and 2/3 master students.
Organic Electronics, semiconducting nanostructures, electrodeposition in ionic liquid, modelling of electrical properties, biosensors, nanobiotechnology, fluorescent quantum dots, labelling, nanocharacterization, cryomicroscopy, Transmission electron microscopy and related analytical modes (EDS, EELS), correlative microscopy, instrumentation, Atomic Force Microscopy (“classical” and high speed), cathodoluminescence, Kelvin Probe Microscopy, nanoInfrared spectroscopy and microscopy, nanomechanical properties, biophysics
At the organizational and scientific level, the laboratory is organized around 3 topics, the staffs being able to intervene in several thematic areas according to their competences:
The research field "elaboration of nanomaterials and applications" brings together topics related to the development of organic transistors and the development of semiconducting nano-objects through low cost methods that can lead to industrial transfers such as electrodeposition, mainly in ionic solvent, which allows controlled growths of nanowires and nanotubes. Highly fluorescent CdSe/ZnS quantum dots are also synthesized chemically. The synthesized objects are characterized by classical methods for their structural properties (electron microscopies and associated analytical analysis EDS or EELS, X-ray diffraction, atomic force microscopy, infrared absorption spectroscopy, Raman...), optical properties (UV-vis, fluorescence, photoluminescence, cathodoluminescence) and electrical (4-point measurements, I(V), C(V) with temperature control) as well as by original methods developed in theme 2. The experimental results are complemented by modeling of the electrical properties of organic transistors and semiconductor nanocrystals (Monte Carlo model for carrier diffusion lengths). For OTFTs (Organic Thin Film Transistors), an original I(V) model of organic transistor that takes into account the physical mechanisms of charge transport and injection in organic semiconductors has been developed.
The theme "Nanocharacterization and methodological developments" includes activities related to the development of new characterization techniques at the nanoscale, from nanomaterials to biological objects. The electron microscopies (scanning transmission electron microscopy, transmission electron microscopy and scanning electron microscopy), near-field microscopy and fluorescence microscopy activities provides a very versatile panel of methodologies for characterizing the nano-objects developed in the lab or by national and international partners. In addition to conventional analyzes, the researchers focus on the development of new experiments to improve the potentiality of the commercialized equipment but also to correlate the structural, chemical, optical, mechanical and electronic properties at nanoscale. Current developments include KPFM measurements of polarized devices, NanoInfrared measurements coupled with local mechanical properties, the development of high-speed AFM microscopy, electronic cryomicroscopy techniques and optical/electronic correlative microscopy.
The topic "Nano-biotechnology" focuses on the field of Health and biology at the interface between "nano" and "bio", that is to say the recognition of endogenous biomolecules by synthetic nano-biosensors. Biomedical applications are related to the development of "lab-on-a-bead" and "lab-on-a-chip" diagnostic platforms using semiconducting fluorescent Quantum Dots (QDs) and polymer beads doped with QDs of different sizes and colors. The new sensor molecules such as "single domain" antibodies coupled with individual QDs or on the surface of QD-doped beads are part of the team's innovative developments allowing for a very significant increase in sensitivity and specificity for the detection and diagnosis of tumoral, inflammatory and autoimmune pathologies.
Bercu B., Giraudet L., Simonetti O., Nicolas J.-L., Molinari M., "Procédé pour la mesure de potentiels de surface sur des dispositifs polarisés", PCT/FR2013/052140 (2013) - FR 2995698 (A1), classification internationale : G01N27/60 ; G01R31/28. Référence équivalente : WO 2014044966 (A1).
A. Kisserli, V. Duret, W. Mahmoud, B. Reveil, J.H.M. Cohen. "Méthode de détermination du polymorphisme de longueur de la molécule CR1" », Demande de Brevet N° FR1454010 (2014). Université de Reims-Champagne Ardenne
The laboratory develops a very strong multidisciplinary activity thanks to the presence of physicists, electronics engineers, biophysicists, biochemists, and clinicians who place the LRN in a strong dynamic of development at the interfaces and allows us to develop ambitious projects by internally controlling the different aspects going from development, to characterization and final application.
In addition, one of the strengths of the laboratory is its high visibility internationally with the participation as a PI or partner in several FP7, H2020, ERA-NET or exchange projects thanks to the skills of its researchers.