Water Affinity and Surface Charging at the z-Cut and y-Cut LiNbO3 Surfaces: An Ambient Pressure X-ray Photoelectron Spectroscopy Study

Kumara Cordero-Edwards; Laura Rodríguez; Annalisa Calò; Ma José Esplandiu; Virginia Pérez-Dieste; Carlos Escudero; Neus Domingo; Albert Verdaguer

doi:10.1021/acs.jpcc.6b05465

Water Affinity and Surface Charging at the z-Cut and y-Cut LiNbO₃ Surfaces: An Ambient Pressure X-ray Photoelectron Spectroscopy Study

Kumara Cordero-Edwards, Laura Rodríguez, Annalisa Calò, Ma José Esplandiu, Virginia Pérez-Dieste, Carlos Escudero, Neus Domingo, Albert Verdaguer

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

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.

Original language	English
Pages (from-to)	24048-24055
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	120
Issue number	42
DOIs	https://doi.org/10.1021/acs.jpcc.6b05465
State	Published - Oct 27 2016
Externally published	Yes

Funding

This work has been partially funded by the 2014 SGR 1216 project from the Generalitat de Catalunya, the MAT2012- 38319-C02-01, the FIS2013-48668-C2-1-P, and FIS2015- 73932-JIN from the Spanish Ministerio de Economia?

Funders	Funder number
Ministerio de Economia?
Seventh Framework Programme	308023
Generalitat de Catalunya	FIS2013-48668-C2-1-P, FIS2015- 73932-JIN, MAT2012- 38319-C02-01

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10.1021/acs.jpcc.6b05465

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title = "Water Affinity and Surface Charging at the z-Cut and y-Cut LiNbO3 Surfaces: An Ambient Pressure X-ray Photoelectron Spectroscopy Study",

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.",

author = "Kumara Cordero-Edwards and Laura Rodr{\'i}guez and Annalisa Cal{\`o} and Esplandiu, {Ma Jos{\'e}} and Virginia P{\'e}rez-Dieste and Carlos Escudero and Neus Domingo and Albert Verdaguer",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = oct,

day = "27",

doi = "10.1021/acs.jpcc.6b05465",

language = "English",

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TY - JOUR

T1 - Water Affinity and Surface Charging at the z-Cut and y-Cut LiNbO3 Surfaces

T2 - An Ambient Pressure X-ray Photoelectron Spectroscopy Study

AU - Cordero-Edwards, Kumara

AU - Rodríguez, Laura

AU - Calò, Annalisa

AU - Esplandiu, Ma José

AU - Pérez-Dieste, Virginia

AU - Escudero, Carlos

AU - Domingo, Neus

AU - Verdaguer, Albert

PY - 2016/10/27

Y1 - 2016/10/27

N2 - 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.

AB - 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.

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U2 - 10.1021/acs.jpcc.6b05465

DO - 10.1021/acs.jpcc.6b05465

M3 - Article

AN - SCOPUS:84993982683

SN - 1932-7447

VL - 120

SP - 24048

EP - 24055

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 42

ER -

Water Affinity and Surface Charging at the z-Cut and y-Cut LiNbO₃ Surfaces: An Ambient Pressure X-ray Photoelectron Spectroscopy Study

Abstract

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