Using Ferroelectric Poling to Change Adsorption on Oxide Surfaces

Yun, Yang; Altman, Eric I.

doi:10.1021/ja0762644

Cited by 89 publications

(104 citation statements)

References 28 publications

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“…The strong modification of material surface by polarization charge prompted the interest to investigate the effects of ferroelectricity on the absorptive and catalytic properties of surfaces (Inoue et al, 1984,Yun and Altman, 2007,Zhang et al, 2011. The switchable polarization effects have been explored to regulate the surface chemistry (Kakekhani and Ismail-Beigi, 2015).…”

Section: Energy Barrier At Interfacesmentioning

confidence: 99%

Physical aspects of ferroelectric semiconductors for photovoltaic solar energy conversion

et al. 2016

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Section: Energy Barrier At Interfacesmentioning

confidence: 99%

Physical aspects of ferroelectric semiconductors for photovoltaic solar energy conversion

et al. 2016

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“…4 It has also been suggested that the ability to manipulate the orientation of the ferroelectric dipole property could be used to tune surface reactivity. [5][6][7][8][9][10][11][12][13][14][15][16] Several examples indicating that this may indeed be the case have recently appeared in the literature. 5,6,8,9,[14][15][16][17][18] For example, the rate of photoreduction of aqueous Ag+ ions 5,6 on BaTiO 3 and PZT ͑Ref.…”

Section: Introductionmentioning

confidence: 92%

Ferroelectric polarization dependent interactions at Pd–LiNbO3(0001) interfaces

Zhao

Bonnell

Vohs

2009

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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A combination of Auger electron spectroscopy and temperature-programed desorption was used to characterize the growth and interaction of Pd films with positively and negatively terminated ferroelectric LiNbO 3 (0001) surfaces. The growth mode of vapor-deposited Pd layers at 300 K was found to be dependent on the direction of the ferroelectric polarization with layer-by-layer growth occurring on the negative (c−) surface and particle formation occurring on the positive (c+) surface. The Pd metal layers were also found to be more thermally stable on the c− surface relative to the c+ surface. These results provide another example of how the polarization orientation in ferroelectric materials affects adsorption and reaction on their exposed surfaces. A combination of Auger electron spectroscopy and temperature-programed desorption was used to characterize the growth and interaction of Pd films with positively and negatively terminated ferroelectric LiNbO 3 ͑0001͒ surfaces. The growth mode of vapor-deposited Pd layers at 300 K was found to be dependent on the direction of the ferroelectric polarization with layer-by-layer growth occurring on the negative ͑c − ͒ surface and particle formation occurring on the positive ͑c + ͒ surface. The Pd metal layers were also found to be more thermally stable on the c− surface relative to the c+ surface. These results provide another example of how the polarization orientation in ferroelectric materials affects adsorption and reaction on their exposed surfaces. Disciplines Engineering | Materials Science and Engineering Comments

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“…The ability to electrically switch the reactivity of a surface could form the basis for new classes of thin-film chemical actuators [23,24] and catalysts [25], offering dynamical control of reactivity and selectivity over a wide range in a single system. Further understanding of the interactions of ambients with polarization at ferroelectric surfaces promises to provide a new means for manipulating both ferroelectricity and surface chemistry.…”

Section: -3mentioning

confidence: 99%

“…Experiments have shown that ferroelectric surfaces with opposite polarity have different properties for adsorbing molecules [23,24]. Ab initio calculations have found that catalytic activity [25] and equilibrium surface stoichiometry [26] depend upon polarization orientation.…”

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confidence: 99%

Switching a ferroelectric film by asphyxiation

Hlinka¹

2009

Physics

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According to recent experiments and predictions, the orientation of the polarization at the surface of a ferroelectric material can affect its surface chemistry. Here we demonstrate the converse effect: the chemical environment can control the polarization orientation in a ferroelectric film. In situ synchrotron x-ray scattering measurements show that high or low oxygen partial pressure induces outward or inward polarization, respectively, in an ultrathin PbTiO 3 film. Ab initio calculations provide insight into surface structure changes observed during chemical switching. DOI: 10.1103/PhysRevLett.102.047601 PACS numbers: 77.80.Fm, 68.43.Àh, 68.47.Gh, 77.84.Dy Ferroelectric materials are fascinating and useful because the spontaneous polarization which appears below the Curie temperature T C is strongly coupled to long-range electric and stress fields, leading to outstanding properties such as piezoelectricity and electrically switchable structure [1,2]. Understanding the behavior of ultrathin ferroelectric films, for which interfacial effects begin to dominate over the physics of the film interior, has been an area of major progress recently [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. One of the most important interfacial effects is the screening of the intrinsic surface charge of the polar phase [19], since this bound charge produces an electric field opposing the bulk polarization. The energy of this depolarizing field can be reduced by stripe domain formation [3][4][5][6][7][8][9][10] or by compensation via free charge at the interfaces [8,[11][12][13][14][15][16][17]. In both cases, incomplete screening leads to a depression of T C for thinner films and a critical thickness below which the polar phase is not stable. While electronic charge in metallic electrodes provides screening adequate to stabilize the polar phase down to nanometer dimensions [8,11,12,17], similar small critical thicknesses have been observed for films without surface electrodes [2,13,15,16]. Ab initio calculations [15,16] have indicated that extra ions or point defects could be providing charge compensation at these surfaces. Such ionic compensation of ferroelectric surfaces has also been inferred from electric force microscopy measurements [20]. The electronic or ionic nature of the compensating charge at interfaces has become a subject of debate for polar oxides in general [19,21,22].Because of this evidence that ions can provide surface charge compensation for ferroelectrics, potentially giving new device functionality, several recent studies have focused on the interaction between the chemistry of the environment and the polarization orientation. Experiments have shown that ferroelectric surfaces with opposite polarity have different properties for adsorbing molecules [23,24]. Ab initio calculations have found that catalytic activity [25] and equilibrium surface stoichiometry [26] depend upon polarization orientation. In this work, we demonstrate the converse effect-that the chemical environment can control the p...

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Using Ferroelectric Poling to Change Adsorption on Oxide Surfaces

Cited by 89 publications

References 28 publications

Physical aspects of ferroelectric semiconductors for photovoltaic solar energy conversion

Physical aspects of ferroelectric semiconductors for photovoltaic solar energy conversion

Ferroelectric polarization dependent interactions at Pd–LiNbO3(0001) interfaces

Switching a ferroelectric film by asphyxiation

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