Tailoring the surface area of ZnO nanorods for improved performance in glucose sensors

Kim, Ji Yeong; Jo, Soyeon; Sun, Guang–Zhen; Katoch, Akash; Choi, Sun-Woo; Kim, Sang Sub

doi:10.1016/j.snb.2013.10.113

Cited by 77 publications

(55 citation statements)

References 25 publications

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“…The electrochemical sensor works because of the oxidation of hydrogen peroxide (H 2 O 2 ) and the reduction of oxygen in the presence of the enzyme GO x , and the chemical reaction can be described as follows [25][26][27]:…”

Section: Materials and Device Characterizationsmentioning

confidence: 99%

Investigation of the Influence of the As-Grown ZnO Nanorods and Applied Potentials on an Electrochemical Sensor for In-Vitro Glucose Monitoring

Marie

Manasreh

2017

Chemosensors

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Abstract:The influence of the as-grown zinc oxide nanorods (ZnO NRs) on the fabricated electrochemical sensor for in vitro glucose monitoring were investigated. A direct growth of ZnO NRs was performed on the Si/SiO 2 /Au electrode, using hydrothermal and sol-gel techniques at low temperatures. The structure, consisting of a Si/SiO 2 /Au/GO x /Nafion membrane, was considered as a baseline, and it was tested under several applied potential 0.1-0.8 V. The immobilized working electrode, with GO x and a nafion membrane, was characterized amperometrically using a source meter Keithely 2410, and an electrochemical impedance Gamry potentiostat. The sensor exhibited the following: a high sensitivity of~0.468 mA/cm 2 mM, a low detection limit in the order of 166.6 µM, and a fast and sharp response time of around 2 s. The highest sensitivity and the lowest limit of detection were obtained at 0.4 volt, after the growth of ZnO NRs. The highest net sensitivity was obtained after subtracting the sensitivity of the baseline, and it was in the order of 0.315 mA/cm 2 ·mM. The device was tested with a range of glucose concentrations from 1-10 mM, showing a linear line from 3-8 mM, and the device was saturated after exceeding high concentrations of glucose. Such devices can be used for in vitro glucose monitoring, since glucose changes can be accurately detected.

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Section: Materials and Device Characterizationsmentioning

confidence: 99%

Investigation of the Influence of the As-Grown ZnO Nanorods and Applied Potentials on an Electrochemical Sensor for In-Vitro Glucose Monitoring

Marie

Manasreh

2017

Chemosensors

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“…The biosensor with an AR of 60 exhibited a sensitivity of 110.76 μA mM −1 cm −2 , a K M app of 0.137 mM, and a response time of < 1 s. This demonstrated that the ZnO nanorod array with high specific surface area provided a favorable microenvironment for immobilized GOx, and efficient electroconducting tunnels for electron transfer. Kim et al [33] improved the performance of glucose sensors, by tailoring the surface area of ZnO nanorod array. Aligned ZnO nanorods grown directly on the electrode exhibited better performance than randomly distributed nanorods.…”

Section: Science China Materialsmentioning

confidence: 99%

ZnO nanostructures in enzyme biosensors

et al. 2015

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Biosensing has developed tremendously since it was demonstrated by Leland C. Clark Jr. in 1962. ZnO nanomaterials are attractive candidates for fabricating biosensors, because of their diverse range of nanostructures, high electron mobility, chemical stability, electrochemical activity, high isoelectric points which promote enzyme adsorption, biocompatibility, and piezoelectric properties. This review covers ZnO nanostructures applied in enzyme biosensors, in the light of electrochemical transduction and field effect transduction. Different assembly processes and immobilization methods have been used to load enzymes into various ZnO nanostructures, providing enzymes with favorable micro-environments and enhancing their sensing performance. We briefly describe recent trends in ZnO syntheses, and the analytical performance of the fabricated biosensors, summarize the advantages of using ZnO nanostructures in biosensors, and conclude with future challenges and prospects.

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“…Up to now, great attention has been focused on the investigation of ZnO nanostructures including thin film, nanowires, nanorods, and nanoparticles [9][10][11][12][13]. Due to the high specific surface area and excellent optical and electrical properties, ZnO nanorods have attracted much attention for their applications in solar cells [14][15][16][17][18]. Unfortunately, the absorption of ZnO in the visible-light region is very low due to its wide bandgap [19,20].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, optical properties, and catalytic performance of Cu2O-modified ZnO nanorods prepared by electrodeposition

Jiang¹,

Lin²,

Zhang³

et al. 2016

Nano Online

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Cu 2 O-modified ZnO nanorods are prepared by a two-step electrodeposition method on ITO substrates, and the deposition time of Cu 2 O is 0, 1, 5, and 10 min, respectively. Cu 2 O particles are embedded in the interspaces of the ZnO nanorods, and the amounts of the Cu 2 O particles increase obviously when the deposition time lasts longer. The peaks corresponding to ZnO nanorods and Cu 2 O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results. UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV. The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu 2 O electrodeposition time for 10 min.

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Tailoring the surface area of ZnO nanorods for improved performance in glucose sensors

Cited by 77 publications

References 25 publications

Investigation of the Influence of the As-Grown ZnO Nanorods and Applied Potentials on an Electrochemical Sensor for In-Vitro Glucose Monitoring

Investigation of the Influence of the As-Grown ZnO Nanorods and Applied Potentials on an Electrochemical Sensor for In-Vitro Glucose Monitoring

ZnO nanostructures in enzyme biosensors

Microstructure, optical properties, and catalytic performance of Cu2O-modified ZnO nanorods prepared by electrodeposition

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