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Time-of-flight photoelectron spectromicroscopy of single nanotubes
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View: Figures


Image of FIG. 1.
FIG. 1.

PEEM image of a group of NTs on excited by femtosecondlaser radiation with photon energy. Insert: TEM image of a NT.

Image of FIG. 2.
FIG. 2.

(a) Energy dispersive x-ray spectrum of an area of about on a NT. (b) Intensity line scan of the and signals in (a) along the line denoted in the insert to Fig. 1.

Image of FIG. 3.
FIG. 3.

Local spectra of selected NTs [(a) and (b) corresponding to regions A and B in Fig. 1] and the substrate [(c), region C in Fig. 1]. Spectrum (b) after background correction is shown in (d). The probability for direct transitions (e) at the excitation with photons was derived from the calculated DOS.

Image of FIG. 4.
FIG. 4.

(a) Calculated DOS of a slab. The arrows denote one possible two-photon transition. denotes the experimental work function. The shaded areas assign the ranges that are energetically allowed to take part in the two-photon excitation. (b) Shows the DOS parts relevant for direct photoexcitation on a shifted energy scale and (c) and (d) are the corresponding probabilities.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Time-of-flight photoelectron spectromicroscopy of single MoS2 nanotubes