Influence of Boron-Doped Diamond Surface Termination on the Characteristics of Titanium Dioxide Anodically Deposited in the Presence of a Surfactant. Issue 8 (1st January 2015)

• Record Type: Journal Article
• Authors: Spătaru, Tanţa; Preda, Loredana; Munteanu, Cornel; Căciuleanu, Alexandru Ioan; Spătaru, Nicolae; Fujishima, Akira
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 8(2015)
• Page Start: H535
• Page End: H540
• Publication Date: 2015-01-01
• Subjects: Boron-doped diamond -- Electrodeposition -- Surface termination -- Titanium oxide; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0741508jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Boron-doped diamond (BDD) films were subjected to cathodic or anodic pre-treatments to achieve hydrogen-terminated (BDD-H) or oxygen-terminated (BDD-O) surfaces and then used as supports for surfactant-assisted anodic deposition of titanium oxide. Cyclic voltammetry and EIS experiments have shown that, unlike BDD-O case, at the BDD-H surface a stable layer of sodium dodecyl sulfate (SDS) is formed, which hinders TiO2 overall deposition process, as demonstrated by linear sweep voltammetry. SEM measurements revealed that this sluggish process leads to a better uniformity and to a higher roughness of the oxide coatings. When deposited on BDD-H, TiO2 also exhibited a light to dark current ratio with ca. 28% higher than that enabled by the use of a BDD-O substrate, indicating a better efficiency of charge carrier separation.