Spectroelectrochemical investigation of surface states in nanostructured TiO(sub 2) electrodes

Article Abstract:

Surface states in nanostructured TiO(sub 2) electrodes have been investigated using spectroelectrochemical techniques. Results show that a small optical response caused by trapped electrons takes place at applied potentials positive of V(sub fb), a response which differs significantly from that of conduction band electrons. The extinction coefficient of an electron trapped in a surface state is more than three times higher than that of a conduction band electron at the same wavelength. The location and density of the surface states were also identified.

Optical properties, Semiconductors, Titanium dioxide, Surface chemistry, Electrolytes

---

Spectroelectrochemistry of highly doped nanostructured tin dioxide electrodes

Article Abstract:

A highly-doped nanostructured SnO2:Sb electrode with physical properties that are different from undoped nanostructured semiconductor electrodes has been synthesized. The electrode develops a depletion layer near the semiconductor/electrolyte interface upon the application of a positive flatband potential. The depletion layer extends throughout the electrode and may have a voltage drop as high as one volt. Electrons can migrate to the SnO2 conduction band or from the conduction band to the electroactive species since the depletion layer is very thin.

Thin films

---

Time-resolved optical spectroscopy of heterosupramolecular assemblies based on nanostructured TiO(sub 2) films modified by chemisorption of covalently linked ruthenium and viologen complex components

Article Abstract:

Preparation of transparent nanostructural TiO(sub 2) and Sb-doped SnO(sub 2) films supported on F-doped conducting glass is described. Results in electron injection into the TiO(sub 2) or SnO(sub 2):Sb nanocrystal component (60%) and electron transfer to the viologen component (40%).

Analysis, Spectrum analysis, Spectra, Spectroscopy, Titanium compounds, Structure

Similar abstracts:

• Abstracts: Electrochemical investigation of traps in a nanostructured TiO2 film. Photolelectrochemistry of nanostructured WO3 thin film electrodes for water oxidation: mechanism of electron transport
• Abstracts: Stepped silicon surfaces as templates for one-dimensional nanostructures. Chemical modification of self-assembled monolayers by exposure to soft X-rays in air
• Abstracts: Driving force for electron transport in porous nanostructured photoelectrodes. Charge carrier dynamics in illuminated, particulate ZnO electrodes
• Abstracts: Structural study of electrochemically deposited Cu on p-GaAs(100) in H(sub-2)SO(sub-4) solution by in Situ surface-sensitive x-ray absorption fine structure measurements
• Abstracts: Calorimetric and dynamic light-scattering investigation of cationic surfactant-DNA complexes. Conformation change of poly(dG-dC).(dG-dC) in cationic polyamine liposome complexes: effect of charge density and flexibility of amine chains in headgroups

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.