This title appears in the Scientific Report : 2020 

Quantitative measurement of charge accumulation along a quasi-one-dimensional W 5 O 14 nanowire during electron field emission
Zheng, Fengshan (Corresponding author)
Pozzi, Giulio / Migunov, Vadim / Pirker, Luka / Remškar, Maja / Beleggia, Marco / Dunin-Borkowski, Rafal E.
Mikrostrukturforschung; PGI-5
Materialwissenschaft u. Werkstofftechnik; ER-C-2
Nanoscale, 12 (2020) S. 10559-10564
Cambridge RSC Publ. 2020
Journal Article
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We use an electron holographic method to determine the charge distribution along a quasi-one-dimensional W5O14 nanowire during in situ field emission in a transmission electron microscope. The results show that the continuous charge distribution along the nanowire is not linear, but that there is an additional accumulation of charge at its apex. An analytical expression for this additional contribution to the charge distribution is proposed and its effect on the field enhancement factor and emission current is discussed.