Journalartikel
Autorenliste: Yan, H; Narasimha, KT; Denlinger, J; Li, FH; Mo, SK; Hohman, JN; Dahl, JEP; Carlson, RMK; Tkachenko, BA; Fokin, AA; Schreiner, PR; Hussain, Z; Shen, ZX; Melosh, NA
Jahr der Veröffentlichung: 2018
Seiten: 1099-1103
Zeitschrift: Nano Letters
Bandnummer: 18
Heftnummer: 2
Open Access Status: Green
DOI Link: https://doi.org/10.1021/acs.nanolett.7b04645
Verlag: American Chemical Society
The monochromatic photoemission from diamondoid monolayers provides a
Abstract:
new strategy to create electron sources with low energy dispersion and
enables compact electron guns with high brightness and low beam
emittance for aberration-free imaging, lithography, and accelerators.
However, these potential applications are hindered by degradation of
diamondoid monolayers under photon irradiation and electron bombardment.
Here, we report a graphene-protected diamondoid monolayer photocathode
with 4-fold enhancement of stability compared to the bare diamondoid
counterpart. The single-layer graphene overcoating preserves the
monochromaticity of the photoelectrons, showing 12.5 meV ful width at
half-maximum distribution of kinetic energy. Importantly, the graphene
coating effectively suppresses desorption of the diamondoid monolayer,
enhancing its thermal stability by at least 100 K. Furthermore, by
comparing the decay rate at different photon energies, we identify
electron bombardment as the principle decay pathway for diamondoids
under graphene protection. This provides a generic approach for
stabilizing volatile species on photocathode surfaces, which could
greatly improve performance of electron emitters.
Zitierstile
Harvard-Zitierstil: Yan, H., Narasimha, K., Denlinger, J., Li, F., Mo, S., Hohman, J., et al. (2018) Monochromatic Photocathodes from Graphene-Stabilized Diamondoids, Nano Letters, 18(2), pp. 1099-1103. https://doi.org/10.1021/acs.nanolett.7b04645
APA-Zitierstil: Yan, H., Narasimha, K., Denlinger, J., Li, F., Mo, S., Hohman, J., Dahl, J., Carlson, R., Tkachenko, B., Fokin, A., Schreiner, P., Hussain, Z., Shen, Z., & Melosh, N. (2018). Monochromatic Photocathodes from Graphene-Stabilized Diamondoids. Nano Letters. 18(2), 1099-1103. https://doi.org/10.1021/acs.nanolett.7b04645
