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Charge Transfer Equilibria Between Diamond and an Aqueous Oxygen Electrochemical Redox Couple
Abstract
Undoped, high-quality diamond is, under almost all circumstances, one of the best insulators known. However, diamond covered with chemically bound hydrogen shows a pronounced conductivity when exposed to air. This conductivity arises from positive-charge carriers (holes) and is confined to a narrow near-surface region. Although several explanations have been proposed, none has received wide acceptance, and the mechanism remains controversial. Here, we report the interactions of hydrogen-terminated, macroscopic diamonds and diamond powders with aqueous solutions of controlled pH and oxygen concentration. We show that electrons transfer between the diamond and an electrochemical reduction/oxidation couple involving oxygen. This charge transfer is responsible for the surface conductivity and also influences contact angles and zeta potentials. The effect is not confined to diamond and may play a previously unrecognized role in other disparate systems.
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CRC Handbook of Chemistry and Physics
(2014) · doi:10.1201/b17118 · Cited by 57,706
Cited by
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Self-assembled monolayers in organic electronics
Casalini, S., Bortolotti, C. A., Leonardi, F., & Biscarini, F. (2017) · Chemical Society Reviews · doi:10.1039/c6cs00509h · Cited by 608
Wang, S., Ren, C., Tian, H., Yu, J., & Sun, M. (2018) · Physical Chemistry Chemical Physics · doi:10.1039/c8cp00808f · Cited by 423
Strain Engineering for Phosphorene: The Potential Application as a Photocatalyst
Sa, B., Li, Y.-L., Qi, J., Ahuja, R., & Sun, Z. (2014) · The Journal of Physical Chemistry C · doi:10.1021/jp508618t · Cited by 422
Metadata
- Authors
- Chakrapani, V., Angus, J. C., Anderson, A. B., Wolter, S. D., Stoner, B. R., & Sumanasekera, G. U.
- Venue
- Science
- Published
- 2007-11-30
- Volume
- 318
- Issue
- 5855
- Pages
- 1424-1430
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2026362444
- Cited by
- 724
- References
- 1
- FWCI
- 12.25
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chakrapani, V., Angus, J. C., Anderson, A. B., Wolter, S. D., Stoner, B. R., & Sumanasekera, G. U. (2007). Charge Transfer Equilibria Between Diamond and an Aqueous Oxygen Electrochemical Redox Couple. Science. https://doi.org/10.1126/science.1148841
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
