Effect of phosphate buffer saline solution on the performance of zinc oxide thin film surface electrodes using electrochemical detection for glucose biosensor

Nasori, Nasori; Hafida, Nura H.; Tahier, Ahmad R. H.; Rubiyanto, Agus

doi:10.1063/5.0030415

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…Therefore, adding a thin Au layer which has low ohmic properties to chemical response beneath the ZnO nanosquare array can significantly affect the sensitivity of the electrode due to the high biocompatibility and conductivity of Au. The addition of a thin Au layer was shown to increase the sensitivity of ZnO thin films to detect glucose [ 21 ]. In the application of this ZnO nanosquare electrode, the presence of a thin Au layer on top of the FTO substrate functions as a Schottky barrier between FTO and the ZnO nanosquare array.…”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive ZnO/Au Nanosquare Arrays Electrode for Glucose Biosensing by Electrochemical and Optical Detection

et al. 2023

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The fabrication of a ZnO/Au nanosquare-array electrode was successfully carried out for the detection of glucose concentration in biomedical applications. The fabrication of the ZnO/Au nanosquare array using an ultra-thin alumina mask (UTAM) based on the imprinted anodic aluminum oxide (AAO) template and the direct current (DC) sputtering method was able to produce a very well-ordered nanosquare arrangement with a side size of 300 nm and a thickness of 100 nm. Tests were done to evaluate the performance of the electrode by means of cyclic voltammetry (CV) which showed that the addition of glucose oxidase (GOx) increased the sensitivity of the electrode up to 1180 ± 116 μA mM−1cm−2, compared with its sensitivity prior to the addition of GOx of 188.34 ± 18.70 mA mM−1 cm−2. A iox/ired ratio equal to ~1 between the peaks of redox reactions was obtained for high (hyperglycemia), normal, and low (hypoglycemia) levels of glucose. The ZnO/Au nanosquare-array electrode was 7.54% more sensitive than the ZnO/Au thin-film electrode. Furthermore, finite-difference time-domain (FDTD) simulations and theoretical calculations of the energy density of the electric and magnetic fields produced by the ZnO/Au electrode were carried out and compared to the results of CV. From the results of CV, FDTD simulation, and theoretical calculations, it was confirmed that the ZnO/Au nanosquare array possessed a significant optical absorption and that the quantum effect from the nanosquare array resulted in a higher sensitivity than the thin film.

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Section: Resultsmentioning

confidence: 99%

Highly Sensitive ZnO/Au Nanosquare Arrays Electrode for Glucose Biosensing by Electrochemical and Optical Detection

et al. 2023

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“…By utilizing the control of imprinted AAO templates, distinct gaps between the CuWO 4 nanorod arrays are obtained and used as a photoanode for the PEC water splitting procedure. The simulation of electric field distribution on CuWO 4 has been carried out in previous research [ 17 ]. The resulting CuWO 4 nanorod arrays were then tested using a solar simulator (100 mW cm −2 ) to measure and compare the electrode performance and the theoretical efficiency between CuWO 4 nanorod arrays that possess distinct gaps between the arrays and CuWO 4 thin films.…”

Section: Introductionmentioning

confidence: 99%

Tunning of Templated CuWO4 Nanorods Arrays Thickness to Improve Photoanode Water Splitting

et al. 2021

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The fabrication of the photoanode of the n-type CuWO4 nanorod arrays was successfully carried out through electrochemical deposition using anodic aluminum oxide (AAO) control templates and for the first time produced distinct gaps between the nanorod arrays. The effectiveness and efficiency of the resulting deposition was shown by the performance of the photoelectrochemical (PEC) procedure with a current density of 1.02 mA cm−2 with irradiation using standard AM 1.5G solar simulator and electron changed radiation of 0.72% with a bias potential of 0.71 V (vs. Ag/AgCl). The gap between each nanorod indicated an optimization of the electrolyte penetration on the interface, which resulted in the expansion of the current density as much as 0.5 × 1024 cm−3 with a flat band potential of 0.14 V vs. Ag/AgCl and also a peak quantum efficiency of wavelength 410 nm. Thus, also indicating the gaps between the nanorod arrays is a promising structure to optimize the performance of the PEC water splitting procedure as a sustainable energy source.

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Bandgap engineering of novel Cu-vanadate/g-C3N4 hierarchical nanoflowers for enhanced photodegradation and excellent biosensing capability

Khan,

Farooq,

Fareed

et al. 2024

Journal of Alloys and Compounds

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Effect of phosphate buffer saline solution on the performance of zinc oxide thin film surface electrodes using electrochemical detection for glucose biosensor

Cited by 5 publications

References 17 publications

Highly Sensitive ZnO/Au Nanosquare Arrays Electrode for Glucose Biosensing by Electrochemical and Optical Detection

Highly Sensitive ZnO/Au Nanosquare Arrays Electrode for Glucose Biosensing by Electrochemical and Optical Detection

Tunning of Templated CuWO4 Nanorods Arrays Thickness to Improve Photoanode Water Splitting

Bandgap engineering of novel Cu-vanadate/g-C3N4 hierarchical nanoflowers for enhanced photodegradation and excellent biosensing capability

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