Patent ID: 9056777
Filing Date: 2015-06-16
Classification: B01J,B82Y,C01B,C01P

Abstract:
1. A method of producing carbon nanotubes, comprising: directing a flow of a gas over a substrate to provide growth of at least one carbon nanotube in a carbon-nanotube-growth region of said substrate by a chemical vapor deposition (CVD) process, said substrate comprising a plurality of electrodes formed on a surface thereof; applying an electric field to said carbon-nanotube-growth region of said substrate using at least two of said plurality of electrodes after said at least one carbon nanotube has begun to grow in said carbon-nanotube-growth region, said electric field being substantially in a first direction in said carbon-nanotube-growth region; and changing said electric field at a preselected time to be substantially in a second direction in said carbon-nanotube-growth region using at least two of said plurality of electrodes during growth of said at least one carbon nanotube, wherein said second direction is different from said first direction resulting in a bend defect substantially at a selected position of said at least one carbon nanotube, said method of producing carbon nanotubes providing the production of said at least one carbon nanotube having at least one bend defect substantially at a selected position along said at least one carbon nanotube.