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Surface Chemistry

Surface Chemistry


Published on 22 November 2019

Surface Chemistry

Sustainable, robust, reproducible and suitable for industry process

Leti Surface Chemistry service offers functional chemical interface following your needs. Leti assists you from identification to your needs to industrial transfer including feasibility test and process optimization for short runs.

Leti surface chemistry service offers processes on semi-conductors and metals, glass and oxides, polymers and plastics from single component to wafer scale taking into account fabrication constraints and application requirements: low temperature, fast, biocompatible and green processes.

Example of services:


 © P. AVAVIAN

© P. AVAVIAN

© P. AVAVIAN
SURFACE FUNCTIONALIZATION: liquid, vapor, supercritical CO2 deposition of: organic layers (silanes, phosphonates, thiols), polymers, silica, patterned (> 1μm)
LOADING:
biological (DNA, PCR fragments, proteins, enzymes, antibodies) or chemical (saccharides, peptides, synthetic molecules) loading by spotting or freeze drying

SURFACE CHARACTERIZATION: contact angle, thickness (from 1nm), roughness, porosity, specific surface, zeta potential, fluorescence



Major achievements:



©CNES/GRIMAULT Emmanuel, 2016










Micro-aiguilles de 400 à 750 microns indolores capable d’atteindre l’interface épiderme/derme. © CEA-Leti 

  • Darpentigny, C., Nonglaton, G., Bras, J., and Jean, B. (2020). Highly absorbent cellulose nanofibrils aerogels prepared by supercritical drying. Carbohydr Polym 229, 115560.

  • Darpentigny, C., Molina-Boisseau, S., Nonglaton, G., Bras, J., and Jean, B. (2020). Ice-templated freeze-dried cryogels from tunicate cellulose nanocrystals with high specific surface area and anisotropic morphological and mechanical properties. Cellulose 27, 233-247.

  • Darpentigny, C., Marcoux, P.R., Menneteau, M., Michel, B., Ricoul, F., Jean, B., Bras, J., and Nonglaton, G. (2020). Antimicrobial Cellulose Nanofibril Porous Materials Obtained by Supercritical Impregnation of Thymol. ACS Appl. Bio Mater. 3, 2965-2975.

  • Darpentigny, C., Sillard, C., Menneteau, M., Martinez, E., Marcoux, P.R., Bras, J., Jean, B., and Nonglaton, G. (2020). Antibacterial Cellulose Nanopapers via Aminosilane Grafting in Supercritical Carbon Dioxide. ACS Appl. Bio Mater. Accepted for publication.