Stabilizing Single Ni Adatoms on a Two-Dimensional Porous Titania Overlayer at the SrTiO3(110) Surface

Autor(en)

Zhiming Wang, Xianfeng Hao, Stefan Gerhold, Petr Mares, Margareta Wagner, Roland Bliem, Karina Schulte, Michael Schmid, Cesare Franchini, Ulrike Diebold

Abstrakt

Nickel vapor-deposited on the SrTiO₃(110) surface was studied

using scanning tunneling microscopy, photoemission spectroscopy (PES),

and density functional theory calculations. This surface forms a (4 × 1)

reconstruction, composed of a 2-D titania structure with periodic six-

and ten-membered nanopores. Anchored at these nanopores, Ni single

adatoms are stabilized at room temperature. PES measurements show that

the Ni adatoms create an in-gap state located at 1.9 eV below the

conduction band minimum and induce an upward band bending. Both

experimental and theoretical results suggest that Ni adatoms are

positively charged. Our study produces well-dispersed single-adatom

arrays on a well-characterized oxide support, providing a model system

to investigate single-adatom catalytic and magnetic properties.

Organisation(en)

Computergestützte Materialphysik

Externe Organisation(en)

Technische Universität Wien, Lund University, Central European Institute of Technology (CEITEC)

Journal

The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces)

Band

118

Seiten

19904-19909

Anzahl der Seiten

6

ISSN

1932-7447

DOI

https://doi.org/10.1021/jp506234r

Publikationsdatum

08-2014

Peer-reviewed

Ja

ÖFOS 2012

103009 Festkörperphysik, 103015 Kondensierte Materie, 103025 Quantenmechanik, 103036 Theoretische Physik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/f71d0ff5-f0e0-481b-82d0-5a90766dc51b