Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 9: Focus Session: Frontiers in Reducible Oxide Surface Science I

O 9.2: Hauptvortrag

Montag, 12. März 2018, 11:00–11:30, HFT-FT 131

Interactions at the interface between cerium oxide and metals — •Paola Luches — Istituto Nanoscienze, CNR, Modena, Italy

The interaction between cerium oxide and metals leads to important modifications of the properties of the two materials, which are exploited in many different applications. Surface science studies have largely contributed to the understanding of these interfacial effects at the atomic scale.

I will show the results of our studies of model systems in the form of cerium oxide ultrathin films, focusing on the interplay with Pt in the form of a single crystal (111) oriented substrate. I will discuss the effects of metal proximity in terms of interface charge transfer [1] and atomic exchange. The influence of the metal substrate on the oxide structure and reducibility will also be described [2,3]. In addition, I will present the case in which the metal is in the form of nanoparticles supported on the cerium oxide film surface, discussing the case of Ag in detail [4,5].

I will finally show some promising research directions towards the exploitation of the interaction between cerium oxide and plasmonic metals, aimed at inducing additional functionalities to the composite system.

[1] P. Luches, et al. Adv. Mater. Interfaces 2, 1500375 (2015).

[2] P. Luches, et al. Phys. Chem. Chem. Phys. 16, 18848 (2014).

[3] G. Gasperi, et al. Phys. Chem. Chem. Phys. 18, 20511 (2016).

[4] P. Luches, et al. J. Phys. Chem. C 116, 1122 (2012).

[5] F. Benedetti, et al. J. Phys. Chem. C 119, 6024 (2015).