ANR Project : SURF-GLASS-IR (2023-2027)
Patterning of Surface Electrical Potential and Chemical Reactivity on Chalcogenide Glass for IR application
Selective optical sensors represent a growing societal need for health control, environmental monitoring, industrial process control security, defense, and so on. In this context, Surf-GLASS-IR propose to explore an electro-activation for the control of surface chemistry on optical materials for the infrared (IR) domain: chalcogenide glasses (ChG). To this aim, it is mandatory to have an accurate physico-chemical description of electrically polarized glassy surfaces and to understand their influence on surface reactivity as well as on the orientation and conformation of a molecular assembly. This collaborative project is based on expertise in (i) glass chemistry, (ii) poling processes, (iii) surface chemistry and (iv) structural and electrical surface characterizations. Surf-GLASS-IR will provide a new level of scientific knowledge in glass surface chemistry. It will open new ways in the design of multi-functional materials with a control of electrical and chemical surface properties on IR optical materials. The project SURF-GLASS-IR will focus interdisciplinary research efforts on fundamentals related to surface electrical and chemical functionalization of surfaces depending of ChG composition. To efficiently treat this collaborative project, an interdisciplinary consortium will be formed: the ICGM owns a long-standing experience in synthesis and investigation of ion conducting ChG, the key material family of the project; two independent groups from the ISM will bring expertise on surface chemistry (ISM-C2M) as well as surface electrical functionalization, characterization by spectroscopy and nonlinear optics (ISM-GSM).
The main objective is to obtain a multifunctional material with optical (transparent in mid-IR), electrical (surface potential patterning) and chemo-selective (specific SAMs) properties. This project addresses new issues in the field of multifunctional materials and will open new technological perspectives, in particular for the future development of optical sensors with specific chemical or biological selectivity. The main scientific challenges targeted by the project are the following:
(i) A micrometer-scale control of electrical potential on ChG surfaces.
(ii) Managing surface reactivity and surface chemical functionalization on electro-patterned ChG glasses.
(iii) Managing the spatial response of an electrosensitive molecular assembly by its grafting on an electro-patterned ChG surface.
(iv) Studying the influence of the electric field on the molecular orientation.
(v) Demonstrating the functionalization of a chip without the use of a mask technology.
The scientific program is divided in three main work packages aiming to progress towards two inter-connected objectives: (i) managing a tunable surface potential patterning on ChGs, (ii) studying interactions between charged surfaces and an electro-sensible molecular assembly for a further control of surface reactivity.
WP1 is dedicated to the fabrication of ChGs with different electronic/ionic conductivities suitable for polishing processes. WP2 concerns the electrical functionalization of glassy surfaces aiming at a spatial control of the surface potential as well as a study of its stability. WP3 will focus on the synthesis of electro-sensitive molecules, as well as on the interactions between charged surfaces and a molecular assembly for further control of the surface reactivity. For all work packages, surface characterization techniques will be used to study glass composition and structural rearrangements, molecular grafting reactivity, orientation and conformation of molecules.
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Coordonnées
Institut des Sciences Moléculaires - groupe C2M
Université de Bordeaux - CNRS UMR 5255 Bâtiment A12, 351 cours de la libération
- 33405
Talence cedex