Element Six and Warwick University develop boron-doped diamond electrodes

**Abstract** Element Six and the University of Warwick have unveiled a groundbreaking boron-doped CVD diamond electrode designed for extreme electrical analysis sensing applications. This innovative material, named DIAFILM EA, was introduced at the Pittsburgh Conference on Analytical Chemistry and Spectroscopy (March 17–21, 2013), marking a significant step forward in electrochemical sensing technology. DIAFILM EA is a monolithic, self-supporting boron-doped diamond electrode produced through a microwave CVD process. It is expected to transform the field of sensing by enabling next-generation technologies in biomedical, environmental, food safety, and pharmaceutical sectors, as well as in oil and gas industries. The material’s exceptional chemical inertness and stability make it ideal for use in harsh environments such as high temperatures, pressures, and corrosive conditions—challenges that traditional electrode materials often fail to overcome. Unlike conventional electrodes that may only function for a single use, DIAFILM EA can withstand thousands of cycles without degradation. Its high phase purity and optimized conductivity also provide superior sensitivity, selectivity, and response time, making it an ideal choice for demanding electroanalytical tasks. Element Six has been working closely with industry partners to showcase the performance of DIAFILM EA, which offers the widest electrochemical potential window and the lowest background current and capacitance among all available electrode materials. These properties are set to redefine electrochemical sensing systems and open up new possibilities in analytical chemistry. Adrian Wilson, Manager of Element Six Technologies Division, noted, “Over the past decade, there has been a growing demand for electrode materials with high electrical conductivity and phase purity. Boron-doped diamond films have not yet met these requirements until now. We’ve developed a CVD diamond with perfect conductivity and 100% phase purity, and DIAFILM EA is set to drive the future of sensor technology.” Professor Julie McPherson from the University of Warwick added, “The development of synthetic diamond as an electrode material has shown great promise in revolutionizing sensing technology. Working with Element Six over the past six years has been a rewarding experience, and we’re excited about the potential of DIAFILM EA.” The technical development of this synthetic diamond was carried out by Element Six’s R&D team in Aesco, UK, while the electrochemical characterization of DIAFILM EA was conducted by the electrochemistry group at the Department of Chemistry, University of Warwick. (This article was compiled by Beijing Wald Superhard Tools Co., Ltd.)

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