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Efficient Fabrication of Carbon Nanotube Point Electron Sources by Dielectrophoresis
Author(s) -
Zhang J.,
Tang J.,
Yang G.,
Qiu Q.,
Qin L.C.,
Zhou O.
Publication year - 2004
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200400124
Subject(s) - dielectrophoresis , carbon nanotube , materials science , field electron emission , nanotechnology , fabrication , electron , electron microscope , field emission display , nanotube , optoelectronics , optics , physics , medicine , alternative medicine , pathology , quantum mechanics , microfluidics
Carbon nanotube tips (see Figure) with controllable length, diameter, and orientation have been fabricated by the dielectrophoresis process. They are capable of delivering high and stable electron‐field‐emission currents of 3–5 μA (10 5 A cm –2 ). The emitters can potentially be used as the field‐emission electron sources for precision vacuum electronic instruments such as electron microscopes.