Determining the work function of a carbon-cone cold-field emitter by in situ electron holography. de Knoop, L.; Houdellier, F.; Gatel, C.; Masseboeuf, A.; Monthioux, M.; and Hytch, M. Micron, 63:2--8, August, 2014. WOS:000338402500002
doi  abstract   bibtex   
Cold-field emission properties of carbon cone nanotips (CCnTs) have been studied in situ in the transmission electron microscope (TEM). The current as a function of voltage, i(V), was measured and analyzed using the Fowler-Nordheim (F-N) equation. Off-axis electron holography was employed to map the electric field around the tip at the nanometer scale, and combined with finite element modeling, a quantitative value of the electric field has been obtained. For a tip-anode separation distance of 680 nm (measured with TEM) and a field emission onset voltage of 80V, the local electric field was 2.55 V/nm. With this knowledge together with recorded i(V) curves, a work function of 4.8 +/- 0.3 eV for the CCnT was extracted using the F-N equation. (C) 2014 Elsevier Ltd. All rights reserved.
@article{de_knoop_determining_2014,
	title = {Determining the work function of a carbon-cone cold-field emitter by in situ electron holography},
	volume = {63},
	doi = {10.1016/j.micron.2014.03.005},
	abstract = {Cold-field emission properties of carbon cone nanotips (CCnTs) have been studied in situ in the transmission electron microscope (TEM). The current as a function of voltage, i(V), was measured and analyzed using the Fowler-Nordheim (F-N) equation. Off-axis electron holography was employed to map the electric field around the tip at the nanometer scale, and combined with finite element modeling, a quantitative value of the electric field has been obtained. For a tip-anode separation distance of 680 nm (measured with TEM) and a field emission onset voltage of 80V, the local electric field was 2.55 V/nm. With this knowledge together with recorded i(V) curves, a work function of 4.8 +/- 0.3 eV for the CCnT was extracted using the F-N equation. (C) 2014 Elsevier Ltd. All rights reserved.},
	journal = {Micron},
	author = {de Knoop, Ludvig and Houdellier, Florent and Gatel, Christophe and Masseboeuf, Aurelien and Monthioux, Marc and Hytch, Martin},
	month = aug,
	year = {2014},
	note = {WOS:000338402500002},
	pages = {2--8}
}
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