Vollnhals F, Wintrich P, Walz MM, Steinrück HP, Marbach H (2013)
Publication Type: Journal article
Publication year: 2013
Original Authors: Vollnhals F., Wintrich P., Walz M.-M., Steinrück H.-P., Marbach H.
Publisher: American Chemical Society
Book Volume: 29
Pages Range: 12290-12297
Journal Issue: 39
DOI: 10.1021/la4028095
We demonstrate how a focused electron beam can be used to chemically activate porphyrin layers on Ag(111) such that they become locally reactive toward the decomposition of iron pentacarbonyl, Fe(CO). This finding considerably expands the scope of electron beam induced surface activation (EBISA) and also has implications for electron beam induced deposition (EBID). The influence of the porphyrin layer thickness on both processes is studied in detail using scanning tunneling microscopy (STM) and scanning electron microscopy (SEM) as well as Auger electron spectroscopy (AES) and scanning Auger microscopy (SAM). While a closed monolayer of porphyrin molecules does exhibit some activity toward Fe(CO) decomposition after electron irradiation, a growth enhancement is found for bi- and multilayer films. This is attributed to a partial quenching of activated centers in the first layer due to the close proximity of the silver substrate. In addition, we demonstrate that the catalytic decomposition of gaseous Fe(CO) on Ag(111) can be effectively inhibited by introducing a densely packed monolayer of 2H-tetraphenylporphyrin (2HTPP) molecules. © 2013 American Chemical Society.
APA:
Vollnhals, F., Wintrich, P., Walz, M.-M., Steinrück, H.-P., & Marbach, H. (2013). Electron beam induced surface activation of ultrathin porphyrin layers on Ag(111). Langmuir, 29(39), 12290-12297. https://doi.org/10.1021/la4028095
MLA:
Vollnhals, Florian, et al. "Electron beam induced surface activation of ultrathin porphyrin layers on Ag(111)." Langmuir 29.39 (2013): 12290-12297.
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