a process for the preparation of an object , supporting a lipid bilayer , for use in tissue engineering including the steps of providing an object having a surface , treating the surface of the object with a plasma containing active oxygen to provide the surface of the object with reactive groups a , to provide the surface of the object with reactive groups a , covalently attaching a sterol group to the reactive groups a and contacting the object activated with sterol groups with a lipid solution to form a lipid bilayer .