Method for making ferrocene-embedded multi-wall carbon nanotubes

A method for making ferrocene-embedded multi-wall carbon nanotubes, comprising:

• atomizing a precursor solution comprising xylene, ferrocene and a carrier gas, wherein the precursor solution is injected through an ultrasonic atomization system comprising an atomizing nozzle, a nozzle stem, and an ultrasonic generating unit to form ultrasonic atomized precursor droplets;
• injecting the ultrasonic atomized precursor droplets from the top of a vertical chemical vapor deposition reactor into a preheating zone;
• reacting a reaction gas with the ultrasonic atomized precursor droplets in the vertical chemical vapor deposition reactor to form a film precursor that adsorbs to a growth surface in the vertical chemical vapor deposition reactor to form a layer of multi-wall carbon nanotubes comprising ferrocene particles embedded therein;
• and
• repeating the atomizing, the injecting of the ultrasonic atomized precursor molecule, and the reacting until one or more layers of the multi-wall carbon nanotubes are formed and then removing the multi-wall carbon nanotubes from the growth surface;
• wherein the multi-wall carbon nanotubes have an outer diameter of 10 nm-51 nm, a length to diameter aspect ratio of 7200-13200.