Layer formation by 1,7-diphosphono-heptane

Surface modification of polycrystalline ARMCO iron and an Fe(110) single crystal was performed using a solution of 1,7-diphosphono-heptane (DPH). The changes of the surface properties were studied by subtractively normalised interfacial Fourier transform infrared spectroscopy (SNIFTIRS), scanning tu...

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Bibliographic Details
Published in:Journal of the Serbian Chemical Society 2001, Vol.66 (11-12), p.859-870
Main Authors: Póczik, P., Felhősi, I., Telegdi, J., Kalaji, M., Kálmán, E.
Format: Article
Language:English
Subjects:
adsorption
diphosphonate
eis
self-assembling molecules
sniftris
stm
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Summary:Surface modification of polycrystalline ARMCO iron and an Fe(110) single crystal was performed using a solution of 1,7-diphosphono-heptane (DPH). The changes of the surface properties were studied by subtractively normalised interfacial Fourier transform infrared spectroscopy (SNIFTIRS), scanning tunneling microscopy (STM) and electrochemical impedance spectroscopy (EIS). The immersion of the surfaces into DPH solution resulted in a build up of an ordered thin multimolecular layer after a few hours of continuous adsorption. The orientation of the DPH molecules was influenced by the supporting electrolyte and the electrode potential. The treatment in the absence of oxygen resulted in a lower corrosion protection effect compared to diphosphonate layer formation in an atmospheric environment. nema
ISSN:0352-5139
1820-7421
DOI:10.2298/JSC0112859P