Effect of Hydrogen Plasma Treatment on the Sensitivity of ZnO Based Electrochemical Non-Enzymatic Biosensor
Tolubayeva D.B. Gritsenko L.V. Kedruk Y.Y. Aitzhanov M.B. Nemkayeva R.R. Abdullin K.A.
August 2023Multidisciplinary Digital Publishing Institute (MDPI)
Biosensors
2023#13Issue 8
Information on vitamin C—ascorbic acid (AA)—content is important as it facilitates the provision of dietary advice and strategies for the prevention and treatment of conditions associated with AA deficiency or excess. The methods of determining AA content include chromatographic techniques, spectrophotometry, and electrochemical methods of analysis. In the present work, an electrochemical enzyme-free ascorbic acid sensor for a neutral medium has been developed. The sensor is based on zinc oxide nanowire (ZnO NW) arrays synthesized via low-temperature chemical deposition (Chemical Bath Deposition) on the surface of an ITO substrate. The sensitivity of the electrochemical enzyme-free sensor was found to be dependent on the process treatments. The AA sensitivity values measured in a neutral PBS electrolyte were found to be 73, 44, and 92 µA mM−1 cm−2 for the ZnO NW-based sensors of the pristine, air-annealed (AT), and air-annealed followed by hydrogen plasma treatment (AT+PT), respectively. The simple H-plasma treatment of ZnO nanowire arrays synthesized via low-temperature chemical deposition has been shown to be an effective process step to produce an enzyme-free sensor for biological molecules in a neutral electrolyte for applications in health care and biomedical safety.
air treatment , ascorbic acid , electrochemical properties , hydrogen plasma treatment , hydrothermal route , non-enzymatic biosensors , zinc oxide nanowires
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Faculty of Metallurgy and Mechanical Engineering, Karaganda Industrial University, Republic Ave. 30, Temirtau, 101400, Kazakhstan
Institute of Energy and Mechanical Engineering, Satbayev University, Satpayev Str., 22, Almaty, 050013, Kazakhstan
National Nanotechnology Laboratory of Open Type (NNLOT), Al-Farabi Kazakh National University, Al-Farabi Ave., 71, Almaty, 050040, Kazakhstan
Faculty of Metallurgy and Mechanical Engineering
Institute of Energy and Mechanical Engineering
National Nanotechnology Laboratory of Open Type (NNLOT)
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