Detail publikace

Resolving the adsorption of molecular O-2 on the rutile TiO2(110) surface by noncontact atomic force microscopy

SOKOLOVIC, I. RETICCIOLI, M. ČALKOVSKÝ, M. WAGNER, M. SCHMID, M. FRANCHINI, C. DIEBOLD, U. SETVÍN, M.

Originální název

Resolving the adsorption of molecular O-2 on the rutile TiO2(110) surface by noncontact atomic force microscopy

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Interaction of molecular oxygen with semiconducting oxide surfaces plays a key role in many technologies. The topic is difficult to approach both by experiment and in theory, mainly due to multiple stable charge states, adsorption configurations, and reaction channels of adsorbed oxygen species. Here we use a combination of noncontact atomic force microscopy (AFM) and density functional theory (DFT) to resolve O-2 adsorption on the rutile TiO2 (110) surface, which presents a longstanding challenge in the surface chemistry of metal oxides. We show that chemically inert AFM tips terminated by an oxygen adatom provide excellent resolution of both the adsorbed species and the oxygen sublattice of the substrate. Adsorbed O-2 molecules can accept either one or two electron polarons from the surface, forming superoxo or peroxo species. The peroxo state is energetically preferred under any conditions relevant for applications. The possibility of nonintrusive imaging allows us to explain behavior related to electron/hole injection from the tip, interaction with UV light, and the effect of thermal annealing.

Klíčová slova

O-2; oxides; TiO2; nc-AFM; tip functionalization

Autoři

SOKOLOVIC, I.; RETICCIOLI, M.; ČALKOVSKÝ, M.; WAGNER, M.; SCHMID, M.; FRANCHINI, C.; DIEBOLD, U.; SETVÍN, M.

Vydáno

30. 6. 2020

Nakladatel

NATL ACAD SCIENCES

Místo

WASHINGTON

ISSN

0027-8424

Periodikum

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

Ročník

117

Číslo

26

Stát

Spojené státy americké

Strany od

14827

Strany do

14837

Strany počet

11

URL

https://www.pnas.org/content/117/26/14827.abstract

BibTex

@article{BUT165544,
  author="Igor {Sokolovic} and Michele {Reticcioli} and Martin {Čalkovský} and Margareta Ilse {Wagner} and Michael {Schmid} and Cesare {Franchini} and Ulrike {Diebold} and Martin {Setvín}",
  title="Resolving the adsorption of molecular O-2 on the rutile TiO2(110) surface by noncontact atomic force microscopy",
  journal="PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA",
  year="2020",
  volume="117",
  number="26",
  pages="14827--14837",
  doi="10.1073/pnas.1922452117",
  issn="0027-8424",
  url="https://www.pnas.org/content/117/26/14827.abstract"
}