Field emission from W5O14 nanowires

0494363 - ÚPT 2019 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Saqib, M. - Knápek, Alexandr - Jelenc, J. - Pirker, L.
Field emission from W5O14 nanowires.
Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Proceedings of the 16th International Seminar. Brno: Institute of Scientific Instruments The Czech Academy of Sciences, 2018, s. 34-35. ISBN 978-80-87441-23-7.
[Recent Trends in Charged Particle Optics and Surface Physics Instrumentation. Skalský dvůr (CZ), 04.06.2018-08.06.2018]
Grant CEP: GA TA ČR(CZ) TE01020118; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
GRANT EU: European Commission(XE) 606988 - SIMDALEE2
Institucionální podpora: RVO:68081731
Klíčová slova: field emission * W5O14 nanowires
Obor OECD: Nano-materials (production and properties)

The W5O14 (O/W=2.8) nanowires are metallic oxides with specific resistivity of 25 microOhm/cm and
diameters bellow 100 nm [1]. They were synthesized by iodine transport method using nickel
as a growth promoter and WO3 as source of tungsten and oxygen. The field emission
characteristics of single nanowires [2] and the films composed of these nanowires have been
reported [3]. The emitting current densities up to 6.4 mA/cm2 have been obtained at relatively
low average electric field of about 3 V/Ohm*m. The samples were allowed to emit for more than
100 hours without showing significant decays of the emitting current and without substantial
current oscillations. Here, we present field emission properties of single W5O14 nanowires
exposed to two ranges of average electric fields (0.7–0.85 V/Ohm*m and up to 37–39 V/Ohm*m.
Trvalý link: http://hdl.handle.net/11104/0287594