Chemical vapor deposition of ordered TiOx nanostructures on Au(111)

Ragazzon, Davide (author): Uppsala universitet,Molekyl- och kondenserade materiens fysik

Schaefer, A. (author)

Farstad, M. H. (author)

Walle, L. E. (author)

Palmgren, P. (author)

Borg, A. (author)

Uvdal, Per (author): Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH

Sandell, Anders (author): Uppsala universitet,Molekyl- och kondenserade materiens fysik

(creator_code:org_t)

Elsevier BV, 2013
2013
English.
In: Surface Science. - : Elsevier BV. - 0039-6028 .- 1879-2758. ; 617, s. 211-217

Related links:: http://dx.doi.org/10...; show more...; https://lup.lub.lu.s...; https://doi.org/10.1...; https://urn.kb.se/re...; https://urn.kb.se/re...; show less...

Abstract Subject headings

The deposition of TiOx (x <= 2) structures on Au(111) by chemical vapor deposition (CVD) in ultrahigh vacuum (UHV) has been investigated with high-resolution core level photoelectron spectroscopy (PES), low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM). Using titanium tetra-isopropoxide as single source precursor it is possible to form different TiOx phases on the surface after deposition: at low coverages, we observe large two-dimensional (2D) honeycomb-lattice Ti2O3 islands with a (2 x 2) registry with the substrate. Higher coverages are dominated by the formation of three-dimensional (3D) TiO2 structures. The TiO2 structures are atomically well ordered provided that the deposition temperature is high enough (500 degrees C). The ordered structure exhibits a LEED pattern characteristic for a rectangular surface unit cell. By performing the deposition at different temperatures it is possible to tune the balance between the 2D and 3D phases: Growth at 500 degrees C significantly favors the formation of 3D TiO2 islands as compared to growth at 200 degrees C and 300 degrees C. (C) 2013 Elsevier B.V. All rights reserved.

NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

By the author/editor: Ragazzon, Davide; Schaefer, A.; Farstad, M. H.; Walle, L. E.; Palmgren, P.; Borg, A.; show more...; Uvdal, Per; Sandell, Anders; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Materials Chemis ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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