Web of Science: 8 citations, Scopus: 8 citations, Google Scholar: citations,
Water affinity and surface charging at the z-Cut and y-Cut LiNbO3 surfaces : an ambient pressure X-ray photoelectron spectroscopy study
Cordero Edwards, Rohini Kumara (Institut Català de Nanociència i Nanotecnologia)
Rodríguez Domínguez, Laura (Institut Català de Nanociència i Nanotecnologia)
Calò, Annalisa (Institut Català de Nanociència i Nanotecnologia)
Esplandiu Egido, Maria José (Institut Català de Nanociència i Nanotecnologia)
Pérez-Dieste, V. (ALBA Laboratori de Llum de Sincrotró)
Escudero, C. (ALBA Laboratori de Llum de Sincrotró)
Domingo Marimon, Neus (Institut Català de Nanociència i Nanotecnologia)
Verdaguer Prats, Albert (Institut Català de Nanociència i Nanotecnologia)

Date: 2016
Abstract: Polarization dependence of water adsorption and desorption on LiNbO₃ surfaces was demonstrated using X-ray photoelectron spectroscopy (XPS) carried out in situ under near-ambient conditions. Positive and negative (0001) faces (z-cut) of the same crystal were compared for the same temperature and pressure conditions. Our results indicate a preferential adsorption on the positive face of the crystal with increasing water pressure and also higher desorption temperature of the adsorbed molecular water at the positive face. Adsorption measurements on the (1100) face (y-cut) showed also strong affinity to water, as observed for the z-cut positive surface. We found a direct relation between the capacity of the surface to discharge and/or to screen surface charges and the affinity for water of each face. XPS spectra indicate the presence of OH groups at the surface for all the conditions and surfaces measured.
Note: Número d'acord de subvenció EC/FP7/308023
Note: Número d'acord de subvenció MINECO/FIS2015-73932-JIN
Note: Número d'acord de subvenció MINECO/FIS2013-48668-C2-1-P
Note: Número d'acord de subvenció MINECO/MAT2012-38319-C02-01
Note: Número d'acord de subvenció AGAUR/2014/SGR-1216
Rights: Tots els drets reservats.
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Subject: Adsorption measurement ; Ambient conditions ; Ambient-pressure x-ray photoelectron spectroscopies ; Desorption temperatures ; Polarization dependence ; Preferential adsorption ; Surface charging ; Temperature and pressures
Published in: Journal of physical chemistry C, Vol. 120, issue 42 (Oct. 2016) , p. 24048-24055, ISSN 1932-7455

DOI: 10.1021/acs.jpcc.6b05465


Postprint
9 p, 430.7 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles

 Record created 2018-12-17, last modified 2020-04-25



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