Laboratoire de Physique et Chimie de Nano-Objets
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Home page > LPCNO > Groups > Nanotech > Thematics of research
Thematics of research
Works on silicon nanocrystals
During the European project NEON (2001-2003), CEMES and IMEL developed a method for the synthesis of a 2D silicon nanocrystals layer embedded in a thin insulating oxide layer obtained by ultra-low-energy ion implantation followed by oxidizing annealing. TEM cross section and SEM plane-view of Si nanocrystals into thin oxide layer The Nanotech team work consists of: Localize and control the quantity of nanocrystals in 2D plan. The original method developed in collaboration with (...)
Works on nanoparticles in colloidal solution
Methods from soft chemistry, developed in LPCNO with the “Nanostructures et Chimie Organométallique” team or in the “Laboratoire de Chimie de Coordination” (LCC), allow elaborating colloids with nature, size, stabilaser, solvent which are perfectly controlled. Nanotech team works on : - The direct assembly of these nanoparticles on large areas or on well defined micro/nano patterns. Two complementary approaches are used : * Convective capillary deposition on chemically functionalised (...)
Works on biological objects
Similar studies on the directed assemblies of proteins and bacteria by convective capillary deposition recently start in our team with a strong collaboration with the “Nanobiosystèmes” Team of LAAS. Topographic and deflexion images by AFM in contact mode under ambient conditions of E.coli bacteria deposited by the convective capillary deposition technique (vdeposition=1 µm.s-1). The deposition occurs on SiO2 patterns of 8-12-16µm size obtained by AFM oxidation on silicon wafer (...)
Other works
Research on AFM and KFM scanning probes studies on localized corrosion of 2024 alumina alloy were also performed with “Corrosion et Protection des matériaux” team collaboration from CIRIMAT. AFM (a) KFM (b) observations of 2024 sample before immersion AFM (c) KFM (d) observations of the sames area after 60min immersion into a a 0.1 M Na2SO4 + 0.001 M NaCl solution
