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Electronically induced modification of thin layers on surfaces
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View: Figures


Image of FIG. 1.
FIG. 1.

Structure elements of self-assembled monolayers (see also Refs. 4 and 5).

Image of FIG. 2.
FIG. 2.

XAS for SAMs, at 50 and (for polarization, i.e., E-vector perpendicular to the surface normal; after Ref. 11).

Image of FIG. 3.
FIG. 3.

PSD of neutrals by resonant excitation from at and at (-polarized light).

Image of FIG. 4.
FIG. 4.

Initial desorption cross sections from (top) and (bottom) .

Image of FIG. 5.
FIG. 5.

Saturation behavior of beam damage as a function of temperature: Relative change of layer thickness after extended irradiation for (top) and (bottom).

Image of FIG. 6.
FIG. 6.

Relative amounts of sulfur containing species after exposure to .

Image of FIG. 7.
FIG. 7.

TD spectra of (left) and (right) from chemisorbed layers on the surface as a function of the heating rate (after Ref. 17, in perfect agreement with Ref. 19).

Image of FIG. 8.
FIG. 8.

Electron induced modifications of TD spectra from a saturated chemisorbed layer of as a function of (homogeneously distributed) electron exposure.

Image of FIG. 9.
FIG. 9.

TD peak areas as a function of electron exposure.

Image of FIG. 10.
FIG. 10.

TD spectra obtained after electron irradiation (full lines) and after readsorption of (broken lines). Readsorption was done by dosing an amount of corresponding to a full bilayer after the post-irradiation TD spectrum (full line) was completed. Because no annealing was applied in order not to disturb peak shapes, small multilayer contributions are visible at the leading edges of the readsorption spectra.

Image of FIG. 11.
FIG. 11.

TD spectra obtained after large homogeneous electron exposures.

Image of FIG. 12.
FIG. 12.

XPS data for the range obtained after electron irradiation , and after electron irradiation and TD up to ( radiation ); smooth lines are fitting results.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electronically induced modification of thin layers on surfaces