Chemical modification of diamond surface by a donor-acceptor organic chromophore (P1): Optimization of surface chemistry and electronic properties of diamond

0493439 - ÚOCHB 2019 RIV NL eng J - Journal Article
Bartoň, Jan - Krýsová, Hana - Janda, Pavel - Tarábková, Hana - Ashcheulov, Petr - Mortet, Vincent - Taylor, Andrew - Vávra, Jan - Cígler, Petr - Kavan, Ladislav
Chemical modification of diamond surface by a donor-acceptor organic chromophore (P1): Optimization of surface chemistry and electronic properties of diamond.
Applied Materials Today. Roč. 12, Sep (2018), s. 153-162. ISSN 2352-9407. E-ISSN 2352-9407
R&D Projects: GA ČR GA13-31783S; GA MŠMT(CZ) EF16_013/0001821; GA AV ČR(CZ) Fellowship J. E. Purkyně
Grant - others:AV ČR(CZ) Fellowship J. E. Purkyně
Program: Fellowship J. E. Purkyně
Institutional support: RVO:61388963 ; RVO:61388955 ; RVO:68378271
Keywords : B-doped diamond electrode * nanodiamond particles * P1 dye * surface sensitization * photoelectrochemistry
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis); Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) (UFCH-W); Condensed matter physics (including formerly solid state physics, supercond.) (FZU-D)
Impact factor: 8.013, year: 2018

The first systematic study of P1-dye attachment to the surface of H-terminated boron-doped diamond (BDD) surface was carried out. Details about surface anchoring chemistry were explored on model nanodiamond particles. The electronic properties of boron doped diamond films were tuned from semiconducting to quasi-metallic ones. The relevant materials were analyzed by advanced chemical analysis, zeta-potential, IR and TEM (nanoparticles), Raman, XPS, AFM, SEM, Hall-effect and by in-depth photo/electrochemical studies (films). An improved photochemical grafting protocol was developed leading to a factor of 3 enhancement in photocurrent on comparable diamond electrodes. The champion electrode provided at 1 sun illumination a photocurrent of 6.6 mu A cm(-2) which is the best value ever reported for a flat BDD electrode.
Permanent Link: http://hdl.handle.net/11104/0286810