Electrochemical characterization of nanosurface-modified screen-printed electrodes by using a source measure unit
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Electrochemical characterization of nanosurface-modified screen-printed electrodes by using a source measure unit YAHIA F MAKABLEH1,∗ , MOHAMED AL-FANDI1 , HUSSAMALDEEN JARADAT2 , ABDULRAHMAN AL-SHAMI1 , ISRAA RAWASHDEH1 and TASNEEM HARAHSHA3 1 Institute
of Nanotechnology, Jordan University of Science and Technology, Irbid 22110, Jordan Engineering Department, Jordan University of Science and Technology, Irbid 22110, Jordan 3 Mechanical Engineering Department, Jordan University of Science and Technology, Irbid 22110, Jordan ∗ Author for correspondence ([email protected]) 2 Computer
MS received 15 February 2020; accepted 10 April 2020 Abstract. In this study, the performance of a source measure unit (SMU) performing cyclic and differential pulse voltammetry analyses, in comparison to potentiostat, is investigated. SMU is a versatile and accurate tool, capable of sourcing and measuring simultaneously and is comparable to the use of a potentiostat for such measurements. Here, two surface-functionalized screen-printed carbon electrodes with two different nanocomposites were utilized to represent the electrochemical system. The results unveil that the electrochemical behaviour of SMU is qualitatively comparable to that of the potentiostat with more than 97% accuracy; for both cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Consequently, SMU is feasible for CV and DPV measurements. Keywords.
Potentiostat; SMU; cyclic voltammetry (CV); differential pulse voltammetry (DPV); nanosurface.
1. Introduction Electrochemistry is the branch of physical chemistry that investigates the association between electricity and chemical reactions. It has several applications in many fields, but is largely used in the biosensing research and development branch [1–5]. This field has progressed rapidly in the past few years due to providing immediate, simple and economical detection abilities. In electrochemical sensing, the electrical signal is a relevant indicator of a target or molecule concentration in a particular sample. Several electrochemical techniques are employed in sensing platforms [6,7]. However, cyclic voltammetry (CV) is commonly utilized, in particular, as a characterization technique [8]. The CV method is acknowledged as a versatile technique due to its ability to immediately provide a considerable measurement, as it has target detection over a wide potential range [9]. Another electrochemical characterizing technique widely used is the differential pulse voltammetry (DPV). In DPV measurements, there is a higher ability to minimize the charging current; thus, higher sensitivity is realized. Besides, only the detectionrelated signals are extracted. Therefore, more accuracy is attained [10]. Primarily, the potentiostat is a commonly used apparatus in many fields of electrochemical investigations performing different measurements such as CV, DPV, electrochemical impedance spectroscopy, aerometry, and others [11]. The potentiostat, mainly, controls the voltage difference b
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