Robertson (cont.)
In cold cathode field emission CNT wins over diamond and DLC because it is good conductor
Adsorbate at the end of the tube increases tunneling (resonant tunneling).
Max current 1 um. Limited by CNT resistance and not by space charge. In reality high curent destroys the Si substrate.
Electric field in plasma sheath creates the alignment. One Ni dot creates one MWNT.
Closely spaced tips screen field emission! Ideally dɮh
Sparse arrays are needed. APL next week V.T.Binh
Economics: many different firms began but now only Samsung makes FEDs. LCDs are cheaper. Needs "killer application". But FED is cheaper than plasma display.