Redondo-Gomez, C.C.Redondo-GomezOrozco, F.F.OrozcoMichael Noeske, P.-L.P.-L.Michael NoeskeSoto-Tellini, V.V.Soto-TelliniCorrales-Ure~na, Y.R.Y.R.Corrales-Ure~naVega-Baudrit, J.J.Vega-Baudrit2022-03-052022-03-052017https://publica.fraunhofer.de/handle/publica/24937610.1016/j.matchemphys.2017.07.089Despite the vast volume of literature regarding the interaction between carbon nanotubes and surfactants, the effect of the covalent attachment of an amphiphilic surfactant based on a biomimetic approach to multiwalled carbon nanotubes (MWCNT) has not been explored. In this report, the functionalization of the MWCNT surface with cholic acid by a chemical route is described. A three-step MWCNT chemical modification route was carried out and the properties of the intermediate and final materials were evaluated employing X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM),atomic force microscopy (AFM) and zeta potential measurements. After functionalization, the MWCNT showed a facial bio-amphiphilic behavior; improving the dispersion stability as compared to commercial and oxidized MWCNT. The resulting material preserved the pristine multi-walled structure and originated surprisingly stable dispersions in aqueous and organic polar and low-polarity solvents.en620journal article