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Representative SEM images of NTs grown on Ti sheet by electrochemical oxidation. The inset shows the magnified area.
I–V emission characteristics of the NT field emitter. Inset: F–N plot of the I–V characteristics. Symbol “Thr” points to threshold electric field value.
Emission current stability as a function of time. The inset shows the magnified region of the dependence at the beginning.
A schematic of experimental setup used for x-ray generation and imaging using NT field emitter.
(a) A radiograph of a standard 1 mm Pb thick resolution phantom imaged with the NT source. (b) An image produced by a standard clinical angiography source with identical setup.
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