1. Deposition of nanocrystalline layers

1. Deposition of nanocrystalline layers

• 1. Deposition of nanocrystalline layers

• 2. Modification of diamond surfaces

• - O2-plasma - NH3-plasma

• - UV/O3-treatment

• 3. Immobilization with photosensitive molecules

• 4. Analyzing the effectiveness of the modification

• - Measurement of contact angles

• - X-ray photoelectron spectroscopy

• - Raman spectroscopy

• 5. Fotoelektrochemical research

Substrate preparation

• Substrate preparation

• Hot-Filament CVD-method

• Operating parameters (gas Mixture 1% CH4 + 99% H2)

Immobilization of

• Immobilization of

• Mn-PhC

• Preparation of the solution

• Treatment of the NCD-layers (about 12 hours)

Cyclic curves of unmodified NCD-sample without phthalocyanine

• Cyclic curves of unmodified NCD-sample without phthalocyanine

• Under  illumination the electrode surface is stable and changes are not observed

Cyclic curves of NCD-sample with phthalocyanine under and without illumination

• Cyclic curves of NCD-sample with phthalocyanine under and without illumination

• There is a difference between the measurements obtained in dark and under illumination

• The voltammetric curves clearly indicate both oxidation and reduction processes answerable for the detected photocurrent.