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Efficient Fabrication of Carbon Nanotube Point Electron Sources by Dielectrophoresis

2004; Volume: 16; Issue: 14 Linguagem: Inglês

10.1002/adma.200400124

1521-4095

J. Zhang, Jie Tang, Guang Yang, Qi Qiu, Lu‐Chang Qin, Otto Zhou,

Nanotechnology research and applications

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 (105 A cm–2). The emitters can potentially be used as the field-emission electron sources for precision vacuum electronic instruments such as electron microscopes.