NDLI: Field emission proporties of copper nanocones grown in polymer ion-track membranes

Content Provider	IEEE Xplore Digital Library
Author	Serbun, P. Jordan, F. Navitski, A. Muller, G. Alber, I. Toimil-Molares, M.E. Trautmann, C.
Copyright Year	2011
Description	Author affiliation: Materials Research, GSI Helmholtz Centre for Heavy Ion Research, D-64291 Darmstadt, Germany (Alber, I.; Toimil-Molares, M.E.; Trautmann, C.) \|\| FB C Physics Department, University of Wuppertal, D-42097, Germany (Serbun, P.; Jordan, F.; Navitski, A.; Muller, G.)
Abstract	Copper nanocones (Cu-NCs) of about 30 µm length and of ∼2.4 µm in base and ∼380 nm in tip diameter were grown in polymer ion-track membranes. Field emission (FE) properties of two types of cathodes with randomly distributed Cu-NCs were investigated. The unstructured cathode with high number density (107 $cm^{−2})$ and excellent mechanical stability of Cu-NCs yielded stable currents up to 100 µA at electric fields of about 100 V/µm as measured with an anode of 30 µm in diameter. The structured cathode with triangular patch array of less Cu-NCs (< $10^{6}$ $cm^{−2})$ provided well-aligned FE with about 90 % efficiency at much reduced onset field levels (∼20 V/µm) but lower current limits, too. SEM images of the random Cu-NCs after current processing revealed only slight changes of the tip morphology. The actual status and further optimization steps of structured Cu-NC cathodes for device applications will be discussed.
Starting Page	183
Ending Page	184
File Size	346270
Page Count	2
File Format	PDF
ISBN	9781457712432
e-ISBN	9783000350818
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-18
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Univ of Wuppertal
Subject Keyword	Cathodes Iron Current measurement Copper Etching Electric fields Shape current limits field emission copper nanocones structured cold cathodes
Content Type	Text
Resource Type	Article

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