The physical and chemical properties of supported Au clusters are markedly sensitive to cluster size and morphology. To investigate the origin of the unique properties of nanosized Au clusters, model catalysts consisting of Au clusters of varying sizes have been prepared on single crystal TiO2(110) and ultrathin films of single crystalline TiO2, SiO2, and Al2O3. The morphology, electronic struc...

The crystal structures of different forms of TiO2 and those of BaTiO3, ZnO, SnO2, WO3, CuO, Fe2O3, Fe3O4, ZrO2 and Al2O3 nanoparticles have been deduced by powder X-ray diffraction. Their optical edges have been obtained by UV-visible diffuse reflectance spectra. The photocatalytic activities of these oxides and also those of SiO2 and SiO2 porous to oxidize iodide ion have been determined and c...

We have studied the electron transport in SiO2(Co)/GaAs and SiO2(Co)/Si heterostructures, where the SiO2(Co) structure is the granular SiO2 film with Co nanoparticles. In SiO2(Co)/GaAs heterostructures giant magnetoresistance effect is observed. The effect has positive values, is expressed, when electrons are injected from the granular film into the GaAs semiconductor, and has the temperature-p...

Doping nanowires (NWs) is of crucial importance for a range of applications due to the unique properties arising from both impurities' incorporation and nanoscale dimensions. However, existing doping methods face the challenge of simultaneous control over the morphology, crystallinity, dopant distribution and concentration at the nanometer scale. Here, we present a controllable and reliable met...

Introduction Titania (TiO2) is an outstanding materials because of its superior physical properties but nanostructured titania films synthesized by an evaporationcondensation aerosol process can be used only for limited applications because of their low mechanical strength. In this study, the surface of titania nanoparticles (TiO2) is modified by a heterogeneous capillary condensation process t...

CO-sensing properties of diode-type sensors employing an anodized TiO2 film and noble-metal (M) electrodes (M/TiO2 sensor, M: Pd, Pt, and Pd-nPt, n: the amount of Pt (wt %) in the Pd-nPt electrode) were investigated at 50–250 ◦C in dry or wet H2. All the M/TiO2 sensors showed nonlinear I–V characteristics as a diode device in air and N2, but the I–V characteristics of the sensors were actually ...

The Minnesota Nano Center’s Keller Hall facility includes an atomic layer deposition (ALD) machine that is capable of depositing uniform alumina (Al2O3), hafnium oxide (HfO2), silicon dioxide (SiO2), zinc oxide (ZnO), and titanium dioxide (TiO2). ALD works by building alternate layers on a film using two different precursor gases – one usually supplying the metallic atoms and water vapor (H2O) ...