Preparation of TiO2 nanocrystallites by oxidation of Ti-Au111 surface alloy.
Ti-Au surface alloy oxidation is used to form nanocrystals of TiO(2) on Au(111). In situ scanning tunneling microscopy (STM) studies show that the approach yields arrays of 8-11 nm wide crystals with relatively narrow size dispersion and uniform crystallography. STM imaging shows that their crystallographic form is rutile with a triangular or hexagonal geometry. Scanning tunneling spectroscopy indicates that the crystals have a well-developed band gap, comparable to that in bulk TiO(2).
Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA.
Denis V
DV
Potapenko
Richard M
RM
Osgood