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(a) SEM images of as-synthesized pattern of NCD microtip arrays. (b) Magnified view of the area denoted in (a). (c) High magnification top view of an isolated NCD-coated microtip. (d) Visible micro-Raman spectrum taken from an isolated NCD microtip.
(a) Image of a broken NCD microtip, cut by FIB; and NCD regions are marked by blue- and red-dotted arrows, respectively. (b) Typical cross-sectional bright-field TEM image of a NCD microtip specimen.
(a) HRTEM images taken at the interface between and NCD [indicated by red -dotted square in Fig. 2(b)]. Lower inset: diffuse rings collected from a thin layer of near the surface. (b) Highly magnified view of a set of (111) diamond lattice planes. Inset: corresponding ED pattern. (c) EDS performed in the amorphous region of (a).
Schematic diagram representing electron flow from Si substrate until emission at the fiber tip.
(a) Plot of the emission current density vs external electric field of as-synthesized NCD microtip array. Inset: corresponding FN plot.
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