SEPARATION METHOD OF PURE CARBON NANOTUBES FROM CARBON NANOTUBES CONTAINING METAL IMPURITIES USING CONTINUOUS MAGNETOPHORESIS AND MICROFLUIDIC DEVICES USED THEREFOR

摘要

A method for separating pure carbon nanotubes from carbon nanotubes containing metal impurities using continuous magnetophoresis and microfluidic devices for separation of pure carbon nanotubes from carbon nanotubes containing metal impurities by the method are provided to obtain carbon nanotubes of very high purity by purifying carbon nanotubes economically and efficiently. A method for separation of pure carbon nanotubes from carbon nanotubes containing metal impurities using continuous magnetophoresis comprises: a first step of injecting carbonnanotube fluid samples before purification into an injection part; a second step of injecting a control fluid into a control fluid injection part to flow the injected carbonnanotube fluid samples through central parts of microfluidic channels(2) in a state that the injected carbonnanotube fluid samples are aligned; a third step of applying a flux density gradient(8) perpendicularly to the microfluidic channels having the control fluid comprising the carbonnanotube fluid samples passed therethrough to separate pure carbon nanotubes(5) from carbon nanotubes(6) containing metal impurities; and a fourth step of capturing the pure carbon nanotubes that have been separated from the carbon nanotubes containing metal impurities through the microfluidic channels of the third step at discharge parts(3,4) in which branch roads are formed at ends of the microfluidic channels.