Study of the cytotoxicity of CCVD carbon nanotubes

The cytotoxicity of different samples of carbon nanotubes synthesised by catalytic chemical vapour deposition was investigated towards human umbilical vein endothelial cells, using two cytotoxicity standard tests (neutral red assay for the cell viability and MTT assay—tetrazolinium salt—for the cell metabolic activity). No toxicity was found for any sample, although a slight dilution effect may exist for two of them

Development of ?heparin-like? polymers using swift heavy ion and gamma radiation. I. Preparation and characterization of the materials

International audienc

Surface treatment of biomaterials by gamma and swift heavy ions grafting

International audienc

Elaboration of modelized surfaces with well defined microtopochemistry-localization of adsorbed proteins

Using microphotolithographic techniques, we have been able to devise silica surfaces bearing two types of microdomains with an average width of 40\u3bcm. One of the microdomain types was silanized in order to make them hydrophobic. Fourier transform-infrared (FTIR) and Auger electron spectroscopies (AES) were used to check the presence of the expected chemical groups on the modified silica surface. Silica and silanized surface morphology was studied using Scanning Force Microscopy (SFM). Wetting properties were investigated. Protein adsorption studies were performed using diluted human decalcified plasma. Attention was focused on the topographic distribution of the adsorbed molecules in order to establish a correlation between the protein behaviour and the specific chemistry of each type of microdomain. Copyright (C) 2000 Elsevier Science B.V