In:
Beilstein Journal of Nanotechnology, Beilstein Institut, Vol. 12 ( 2021-02-16), p. 203-212
Abstract:
Highly ordered titanium oxide films grown on a Pt 3 Ti(111) alloy surface were utilized for the controlled immobilization and tip-induced electric field-triggered electronic manipulation of nanoscopic W 3 O 9 clusters. Depending on the operating conditions, two different stable oxide phases, z’-TiO x and w’-TiO x , were produced. These phases show a strong effect on the adsorption characteristics and reactivity of W 3 O 9 clusters, which are formed as a result of thermal evaporation of WO 3 powder on the complex TiO x /Pt 3 Ti(111) surfaces under ultra-high vacuum conditions. The physisorbed tritungsten nano-oxides were found as isolated single units located on the metallic attraction points or as supramolecular self-assemblies with a W 3 O 9 -capped hexagonal scaffold of W 3 O 9 units. By applying scanning tunneling microscopy to the W 3 O 9 –(W 3 O 9 ) 6 structures, individual units underwent a tip-induced reduction to W 3 O 8 . At elevated temperatures, agglomeration and growth of large WO 3 islands, which thickness is strongly limited to a maximum of two unit cells, were observed. The findings boost progress toward template-directed nucleation, growth, networking, and charge state manipulation of functional molecular nanostructures on surfaces using operando techniques.
Type of Medium:
Online Resource
ISSN:
2190-4286
DOI:
10.3762/bjnano.12.16
Language:
English
Publisher:
Beilstein Institut
Publication Date:
2021
detail.hit.zdb_id:
2583584-1
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