Inducing electrocatalytic functionality in ZnO thin film by N doping to realize a third generation uric acid biosensor

Jindal, Kajal; Tomar, Monika; Gupta, Vinay

doi:10.1016/j.bios.2013.11.015

Cited by 28 publications

(16 citation statements)

References 58 publications

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“…Until now, many research works have been reported about the hydrophobic/hydrophilic reversible process caused by light-controlled method for ZnO-based nanostructures 17 18 19 20 . ZnO has direct wide band gap (3.37 eV), high exciton binding energy (60 meV) and optical transparency in the visible light, thus, ZnO is an expected material for many novel applications, for example, piezoelectric transducers, transparent thin film transistors, chemical biosensors 21 22 , solar cells and ultraviolet (UV) detectors 23 24 25 . According to the above functionalities, ZnO can provide a hydrophobic surface, which may be transformed to hydrophilic surface by UV irradiation, coexists with intrinsic semiconductor properties and a particular surface morphology.…”

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confidence: 99%

Internal stress induced natural self-chemisorption of ZnO nanostructured films

Chi

Wei

2017

Sci Rep

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The energetic particles bombardment can produce large internal stress in the zinc oxide (ZnO) thin film, and it can be used to intentionally modify the surface characteristics of ZnO films. In this article, we observed that the internal stress increased from −1.62 GPa to −0.33 GPa, and the naturally wettability of the textured ZnO nanostructured films changed from hydrophobicity to hydrophilicity. According to analysis of surface chemical states, the naturally controllable wetting behavior can be attributed to hydrocarbon adsorbates on the nanostructured film surface, which is caused by tunable internal stress. On the other hand, the interfacial water molecules near the surface of ZnO nanostructured films have been identified as hydrophobic hydrogen structure by Fourier transform infrared/attenuated total reflection. Moreover, a remarkable near-band-edge emission peak shifting also can be observed in PL spectra due to the transition of internal stress state. Furthermore, our present ZnO nanostructured films also exhibited excellent transparency over 80% with a wise surface wetting switched from hydrophobic to hydrophilic states after exposing in ultraviolet (UV) surroundings. Our work demonstrated that the internal stress of the thin film not only induced natural wettability transition of ZnO nanostructured films, but also in turn affected the surface properties such as surface chemisorption.

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confidence: 99%

Internal stress induced natural self-chemisorption of ZnO nanostructured films

Chi

Wei

2017

Sci Rep

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“…The sensor produced a sensitivity based on subthreshold slope of ~66 mV/decade. Bottom-up ZnO nanorods [126] were also used as lactate oxidase (LOD) biosensor using glutaraldehyde cross-linkers. The device had a subthreshold sensitivity of ~41 mV/decade, with maximum detection of 0.1 μM.…”

Section: Comparing Zno Nanowire Biosensorsmentioning

confidence: 99%

ZnO Nanowire Field-Effect Transistor for Biosensing: A Review

Ditshego¹

2021

Nanowires - Recent Progress

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The last 19 years have seen intense research made on zinc oxide (ZnO) material, mainly due to the ability of converting the natural n-type material into p-type. For a long time, the p-type state was impossible to attain and maintain. This chapter focuses on ways of improving the doped ZnO material which acts as a channel for nanowire field-effect transistor (NWFET) and biosensor. The biosensor has specific binding which is called functionalization that is achieved by attaching a variety of compounds on the designated sensing area. Reference electrodes and buffers are used as controllers. Top-down fabrication processes are preferred over bottom-up because they pave way for mass production. Different growth techniques are reviewed and discussed. Strengths and weaknesses of the FET and sensor are also reviewed.

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“…The resulting uric acid biosensor exhibited a sensitivity of ~66 mV decade −1 , a logarithmic concentration range from 500 nM to 1.5 mM, and good selectivity against ascorbic acid, glucose and urea. N-doped ZnO thin films [80,81] and tetrapod-shaped ZnO nanostructures [82] hav e also been exploited as matrices in uric acid biosensors.…”

Section: Detection Of Other Analytesmentioning

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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Inducing electrocatalytic functionality in ZnO thin film by N doping to realize a third generation uric acid biosensor

Cited by 28 publications

References 58 publications

Internal stress induced natural self-chemisorption of ZnO nanostructured films

Internal stress induced natural self-chemisorption of ZnO nanostructured films

ZnO Nanowire Field-Effect Transistor for Biosensing: A Review

ZnO nanostructures in enzyme biosensors

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