Ordered SMSI decoration layer on Rh nanoparticles grown on TiO 2(110) surface

Z. Majzik, N. Balázs, A. Berkó

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Rh nanoparticles of 20-40 nm lateral size were grown on TiO 2(110) surface by physical vapor deposition and thermal treatments. The top-facet morphology of the Rh nanoparticles and the particle-free support were characterized by scanning tunneling microscopy. The chemical composition of the surface was checked by Auger electron spectrometry. Although most of the particles exhibited complex overlayers, ordered decoration layers were detected only on the top facet of extended hexagonal Rh particles. Several ordered or quasi-ordered encapsulation phases were detected: (1) a "worm-like" overlayer consisting of 1D stripes (width of 0.5 nm and length of 2-3 nm) oriented in the close-packed crystallographic orientations of the Rh nanoparticles and (2) a "wheel-like" hexagonal structure with unit cell vectors of 1.50 (±0.05) nm. The "worm-like" structure is suggested to be an initial stage in the formation of a "wheel-like" structure. It was proved that it is possible to selectively remove the "wheel-like" decoration phase by Ar+ sputtering and to recover it by thermal treatment of a few minutes at 1000 K.

Original languageEnglish
Pages (from-to)9535-9544
Number of pages10
JournalJournal of Physical Chemistry C
Volume115
Issue number19
DOIs
Publication statusPublished - May 19 2011

Fingerprint

wheels
Wheels
worms
Nanoparticles
nanoparticles
flat surfaces
Heat treatment
Physical vapor deposition
Scanning tunneling microscopy
Encapsulation
Spectrometry
Sputtering
scanning tunneling microscopy
chemical composition
sputtering
vapor deposition
Electrons
cells
Chemical analysis
spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Ordered SMSI decoration layer on Rh nanoparticles grown on TiO 2(110) surface. / Majzik, Z.; Balázs, N.; Berkó, A.

In: Journal of Physical Chemistry C, Vol. 115, No. 19, 19.05.2011, p. 9535-9544.

Research output: Contribution to journalArticle

@article{ccfffe3dafb24bbc8860275225c2671d,
title = "Ordered SMSI decoration layer on Rh nanoparticles grown on TiO 2(110) surface",
abstract = "Rh nanoparticles of 20-40 nm lateral size were grown on TiO 2(110) surface by physical vapor deposition and thermal treatments. The top-facet morphology of the Rh nanoparticles and the particle-free support were characterized by scanning tunneling microscopy. The chemical composition of the surface was checked by Auger electron spectrometry. Although most of the particles exhibited complex overlayers, ordered decoration layers were detected only on the top facet of extended hexagonal Rh particles. Several ordered or quasi-ordered encapsulation phases were detected: (1) a {"}worm-like{"} overlayer consisting of 1D stripes (width of 0.5 nm and length of 2-3 nm) oriented in the close-packed crystallographic orientations of the Rh nanoparticles and (2) a {"}wheel-like{"} hexagonal structure with unit cell vectors of 1.50 (±0.05) nm. The {"}worm-like{"} structure is suggested to be an initial stage in the formation of a {"}wheel-like{"} structure. It was proved that it is possible to selectively remove the {"}wheel-like{"} decoration phase by Ar+ sputtering and to recover it by thermal treatment of a few minutes at 1000 K.",
author = "Z. Majzik and N. Bal{\'a}zs and A. Berk{\'o}",
year = "2011",
month = "5",
day = "19",
doi = "10.1021/jp111319n",
language = "English",
volume = "115",
pages = "9535--9544",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "19",

}

TY - JOUR

T1 - Ordered SMSI decoration layer on Rh nanoparticles grown on TiO 2(110) surface

AU - Majzik, Z.

AU - Balázs, N.

AU - Berkó, A.

PY - 2011/5/19

Y1 - 2011/5/19

N2 - Rh nanoparticles of 20-40 nm lateral size were grown on TiO 2(110) surface by physical vapor deposition and thermal treatments. The top-facet morphology of the Rh nanoparticles and the particle-free support were characterized by scanning tunneling microscopy. The chemical composition of the surface was checked by Auger electron spectrometry. Although most of the particles exhibited complex overlayers, ordered decoration layers were detected only on the top facet of extended hexagonal Rh particles. Several ordered or quasi-ordered encapsulation phases were detected: (1) a "worm-like" overlayer consisting of 1D stripes (width of 0.5 nm and length of 2-3 nm) oriented in the close-packed crystallographic orientations of the Rh nanoparticles and (2) a "wheel-like" hexagonal structure with unit cell vectors of 1.50 (±0.05) nm. The "worm-like" structure is suggested to be an initial stage in the formation of a "wheel-like" structure. It was proved that it is possible to selectively remove the "wheel-like" decoration phase by Ar+ sputtering and to recover it by thermal treatment of a few minutes at 1000 K.

AB - Rh nanoparticles of 20-40 nm lateral size were grown on TiO 2(110) surface by physical vapor deposition and thermal treatments. The top-facet morphology of the Rh nanoparticles and the particle-free support were characterized by scanning tunneling microscopy. The chemical composition of the surface was checked by Auger electron spectrometry. Although most of the particles exhibited complex overlayers, ordered decoration layers were detected only on the top facet of extended hexagonal Rh particles. Several ordered or quasi-ordered encapsulation phases were detected: (1) a "worm-like" overlayer consisting of 1D stripes (width of 0.5 nm and length of 2-3 nm) oriented in the close-packed crystallographic orientations of the Rh nanoparticles and (2) a "wheel-like" hexagonal structure with unit cell vectors of 1.50 (±0.05) nm. The "worm-like" structure is suggested to be an initial stage in the formation of a "wheel-like" structure. It was proved that it is possible to selectively remove the "wheel-like" decoration phase by Ar+ sputtering and to recover it by thermal treatment of a few minutes at 1000 K.

UR - http://www.scopus.com/inward/record.url?scp=79956064686&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79956064686&partnerID=8YFLogxK

U2 - 10.1021/jp111319n

DO - 10.1021/jp111319n

M3 - Article

AN - SCOPUS:79956064686

VL - 115

SP - 9535

EP - 9544

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 19

ER -