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Dettlaff A, Rycewicz M, Macewicz Ł, Rutecki P, Sawczak M, Wittendorp P, Jain S, Vereshchagina E, Bogdanowicz R. Optimizing Ni-Cr patterned boron-doped diamond band electrodes: Doping effects on electrochemical efficiency and posaconazole sensing performance. Talanta 2024; 278:126519. [PMID: 39002261 DOI: 10.1016/j.talanta.2024.126519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 06/05/2024] [Accepted: 07/04/2024] [Indexed: 07/15/2024]
Abstract
There is growing interest in developing diamond electrodes with defined geometries such as, for example, micrometer-sized electrode arrays to acquire signals for electroanalysis. For electroanalytical sensing applications, it is essential to achieve precise conductive patterns on the insulating surface. This work provides a novel approach to boron-doped diamond patterning using nichrome masking for selective seeding on an oxidized silicon substrate. The optimized process involves nichrome deposition, sonication, chemical etching, seeding, and tailored chemical vapor deposition of boron-doped diamond with an intrinsic layer to suppress boron diffusion. Through a systematic investigation, it was determined that isolated boron-doped diamond band electrodes can be efficiently produced on non-conductive silica. Additionally, the influence of boron doping on electrochemical performance was studied, with higher doping enhancing the electrochemical response of band electrodes. To demonstrate sensing capabilities, boron-doped diamond bands were used to detect posaconazole, an antifungal drug, exploiting its electroactive behaviour. A linear correlation between posaconazole concentration and oxidation peak current was observed over 1.43 × 10-8 - 5.71 × 10-6 M with a 1.4 × 10-8 M detection limit. The developed boron-doped diamond microbands could significantly impact the field of electroanalysis, facilitating detection of diverse biologically relevant molecules. Overall, this diamond patterning approach overcomes major challenges towards all-diamond electrochemical sensor chips.
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Affiliation(s)
- Anna Dettlaff
- Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233, Gdańsk, Poland.
| | - Michał Rycewicz
- Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233, Gdańsk, Poland
| | - Łukasz Macewicz
- Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233, Gdańsk, Poland
| | - Paweł Rutecki
- Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233, Gdańsk, Poland
| | - Mirosław Sawczak
- Polish Academy of Sciences, The Szewalski Institute of Fluid-Flow Machinery, The Centre for Plasma and Laser Engineering, Fiszera 14, 80-231, Gdańsk, Poland
| | - Paul Wittendorp
- Department of Smart Sensors and Microsystems, SINTEF Digital, Gaustadalléen 23C, 0373, Oslo, Norway
| | - Shruti Jain
- Department of Smart Sensors and Microsystems, SINTEF Digital, Gaustadalléen 23C, 0373, Oslo, Norway
| | - Elizaveta Vereshchagina
- Department of Smart Sensors and Microsystems, SINTEF Digital, Gaustadalléen 23C, 0373, Oslo, Norway
| | - Robert Bogdanowicz
- Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233, Gdańsk, Poland.
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Baezzat MR, Jahromi FZ. Differential Pulse Voltammetric Determination of Acetaminophen Using Carbon Paste Electrode Modified with β-Cyclodextrin/Gold/Titanium Dioxide Nanocomposite. JOURNAL OF ANALYTICAL CHEMISTRY 2022. [DOI: 10.1134/s1061934822010026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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