Vanadium nanoclusters on Si(111) 7×7 surface studied by scanning tunneling microscopy

Iron Particle Nanodrilling of Few Layer Graphene at Low Electron Beam Accelerating Voltages

“…Subsequently, iron was evaporated in an ultra high vacuum (base pressure 5 × 10 −11 mbar) system (OMICRON VT‐STM) by e‐beam using an evaporator EFM3 (OMICRON) with a deposition rate 0.06 ML/min (1 ML = 7.83 × 10 14 atoms/cm 2 ). The rate was estimated from low coverage vanadium deposition by counting the initial Fe atoms in the corresponding STM images onto a Si(1 1 1) 7 × 7 substrate using the same procedure as used for vanadium 43. The iron coverage in this work was 0.02 ML and the starting size of the clusters ranges from some atoms to 1 nm.…”

Ultra thin V2O3 films grown on oxidized Si(1 1 1)

“…In order to grow a vanadia film with such particular surface morphology oxidized Si(1 1 1) appeared as an appropriate substrate. As we have shown recently [21], direct evaporation of vanadium onto the Si(1 1 1)-7 Â 7 surface gives rise to massive silicide formation and subsequent oxygen exposure leads only to the formation of rough V x Si y O z films of unknown structural and chemical composition. In order to prevent initial vanadium silicide formation the Si(1 1 1)-7 Â 7 surface was oxidized prior to vanadium evaporation.…”

Nonlinear effects in infrared action spectroscopy of silicon and vanadium oxide clusters: experiment and kinetic modeling

“…Vanadium oxide clusters are promising candidates as nanocatalysts [56][57][58] and as such the relation between their structure and reactivity has been scrutinized. 59,60 Their vibrational properties are now well documented owing to a number of cluster-rare gas photodissociation 10,40,61,62 and IR-MPD 63,64 investigations, usually supported by DFT calculations in the harmonic approximation.…”