At the PITTCON (Pittsburgh Analytical Chemistry and Laboratory Exhibition) in March 2014, Element Six introduced a groundbreaking fully-coated diamond technology designed for electroanalytical chemical sensing equipment. This innovation was developed in collaboration with the University of Warwick and aimed to revolutionize next-generation electrochemical sensing systems across various industries, including biomedical, environmental monitoring, food safety, industrial process control, pharmaceuticals, and oil and gas exploration.
The fully-coated diamond technology features an EA-grade diamond film from Element Six, combined with a boron-doped diamond electrode that is encapsulated in a coplanar insulated diamond structure. The design allows for multiple electrode configurations, making it highly adaptable. This "wrapping" approach ensures seamless integration with other electrochemical devices while preserving the superior performance of the diamond electrode. Currently, this technology has already been successfully implemented in conductivity meters and other electrochemical instruments.
Professor Julie Macpherson from Warwick University highlighted that fully-coated diamond electrodes can operate in more extreme environments, significantly enhancing the lifespan and reliability of the devices. Additionally, the high durability and precise coplanar electrode array designs improve detection sensitivity under varying conditions.
Mike Riding, general manager of a British instrument manufacturer, praised the partnership between Element Six and Warwick University. He noted that the structured electrode packaging allows for smooth integration with existing analyzer equipment and diamond conductivity sensors, marking a major advancement in electrochemical sensing technology.
Element Six’s EA-grade diamond film electrodes offer several advantages over traditional boron-doped or other electrode materials:
1. The electroanalytical system delivers high sensitivity, selectivity, and rapid response. With 100% phase purity, the electrode provides an extensive electrolyte solution window ranging from -2.3V to +2.4V, improving the detection of ions such as sulfide, lead, copper, and zinc.
2. It reduces substrate failure mechanisms and exhibits strong resistance to corrosion under high temperature and pressure. It also offers excellent chemical inertness, long-term durability, and a surface roughness of Ra < 0.02 µm.
3. Precise control of boron concentration enables the fully-coated diamond electrode to achieve metal-like conductivity and low capacitance, resulting in minimal background current.
As a leader in synthetic diamond applications, Element Six continues to push the boundaries of diamond technology. Adrian Wilson, a senior executive at the company, stated that this fully-coated diamond electrode is a testament to their deep understanding of synthetic diamond properties, especially for future products requiring high sensitivity and robustness in harsh environments.
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