Jump to main content
Jump to site search

Issue 35, 2014
Previous Article Next Article

Selective adsorption of contaminants on Pb(Zr,Ti)O3 surfaces shown by X-ray photoelectron spectroscopy

Author affiliations

Abstract

X-ray photoelectron spectroscopy (XPS) analyses of lead zirco-titanate Pb(Zr,Ti)O3(001) single crystal thin layers as a function of the time spent between sample preparation by pulsed laser deposition and introduction in to a ultrahigh vacuum revealed the fact that freshly prepared samples showed a shift of the C 1s towards a higher binding energy, together with shifts of core levels originating from the substrate (particularly Ti 2p and O 1s) towards a lower binding energy. This behaviour is explained by considering that the molecules of contaminants (fatty acids, alcohols, esters) are adsorbed preferentially on areas exhibiting outwards polarization P(+). Thus, photoelectrons originating from contaminants will have larger binding energies because of the charge state of the P(+) areas, whereas the substrate XPS signals from these P(+) areas are attenuated by the contaminants, with the consequence of a prevalence of XPS substrate signals originating from the P(−) areas, shifted towards lower binding energies. Piezoresponse force microscopy confirmed the assumptions derived from XPS results and suggests the existence of an interplay between the adsorption of contaminants and the surface polarization state.

Graphical abstract: Selective adsorption of contaminants on Pb(Zr,Ti)O3 surfaces shown by X-ray photoelectron spectroscopy

Back to tab navigation

Article information


Submitted
27 May 2014
Accepted
01 Jul 2014
First published
01 Jul 2014

J. Mater. Chem. A, 2014,2, 14386-14392
Article type
Paper
Author version available

Selective adsorption of contaminants on Pb(Zr,Ti)O3 surfaces shown by X-ray photoelectron spectroscopy

L. E. Ştoflea, N. G. Apostol, L. Trupină and C. M. Teodorescu, J. Mater. Chem. A, 2014, 2, 14386
DOI: 10.1039/C4TA02660H

Social activity

Search articles by author

Spotlight

Advertisements