ZnO nanostructure-based electrochemical biosensor for Trichinella DNA detection

Gerbreders, V.; Krasovska, Marina; Mihailova, I.; Ogurcovs, Andrejs; Sļedevskis, Ē.; Gerbreders, A.; Tamanis, E.; Kokina, Inese; Plaksenkova, Ilona

doi:10.1016/j.sbsr.2019.100276

Cited by 26 publications

(20 citation statements)

References 15 publications

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“…DISCUSSIONPolar (0001) c-plane, non-polar(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) a-plane and (10-10) m-plane ZnO crystals were implanted with 30-MeV Au-ions. RBS-C is sensitive to particular defects that increase the dechannelling yield, for example, to Zn interstitials, Zn-distance modification in the basal planes, which was observed to a larger extent in m-plane ZnO.…”

mentioning

confidence: 99%

Modification of structure and surface morphology in various ZnO facets via low fluence gold swift heavy ion irradiation

Jágerová

Malínský

Mikšová

et al. 2020

Surface & Interface Analysis

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The influence of low fluence high‐energy ion irradiation on the modification of the ZnO surface structure and optical properties has been studied. ZnO samples of various orientations, namely, c‐plane (0001), a‐plane (11–20) and m‐plane (10–10), have been implanted with 30‐MeV Au ions with fluences ranging from 5 × 109 to 5 × 1011 cm−2. Rutherford backscattering spectrometry in the channelling mode (RBS‐C) and Raman spectroscopy has shown the distinct damage accumulation in the irradiated surface layer about 1 μm depending on the ZnO facet being to larger extent evidenced in the m‐plane ZnO. Contrary, the a‐plane ZnO has been exhibited the lowest Zn disorder. Using atomic force microscopy (AFM), a complex morphology was detected on the irradiated samples containing grains and exhibiting increased roughness, both growing with the Au implantation fluence mainly in m‐plane ZnO. Positron annihilation spectroscopy (PAS) has shown distinct defect accumulation at the Au‐ion fluence of 5 × 1011 cm−2, where RBS‐C and Raman spectroscopy indicated sudden disorder increase in the irradiated layers, probably the creation of more complex clusters of Zn and O vacancies 4VZn + 8VO initiated in connection with an overlap of individual ion impacts. Photoluminescence measurements have shown a distinct near‐band‐edge (NBE) luminescence, developing with the increasing Au‐ion fluence in various ZnO orientations. The m‐plane ZnO had the most progressively suppressed NBE in comparison with the other orientations.

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mentioning

confidence: 99%

Modification of structure and surface morphology in various ZnO facets via low fluence gold swift heavy ion irradiation

Jágerová

Malínský

Mikšová

et al. 2020

Surface & Interface Analysis

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“…This process is similar to the conventional hydrothermal growth of most metal oxides described in previous studies [ 74 , 78 – 79 ]; however, this work has a fundamental difference: Cu-containing salts are not used in the synthesis process. The copper wire itself acts as the precursor of Cu ions as well as a substrate for the nanostructure growth.…”

Section: Resultsmentioning

confidence: 99%

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

Mihailova¹,

Gerbreders²,

Krasovska³

et al. 2022

Beilstein J. Nanotechnol.

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This article describes the synthesis of nanostructured copper oxide on copper wires and its application for the detection of hydrogen peroxide. Copper oxide petal nanostructures were obtained by a one-step hydrothermal oxidation method. The resulting coating is uniform and dense and shows good adhesion to the wire surface. Structure, surface, and composition of the obtained samples were studied using field-emission scanning electron microscopy along with energy-dispersive spectroscopy and X-ray diffractometry. The resulting nanostructured samples were used for electrochemical determination of the H2O2 content in a 0.1 M NaOH buffer solution using cyclic voltammetry, differential pulse voltammetry, and i–t measurements. A good linear relationship between the peak current and the concentration of H2O2 in the range from 10 to 1800 μM was obtained. The sensitivity of the obtained CuO electrode is 439.19 μA·mM−1. The calculated limit of detection is 1.34 μM, assuming a signal-to-noise ratio of 3. The investigation of the system for sensitivity to interference showed that the most common interfering substances, that is, ascorbic acid, uric acid, dopamine, NaCl, glucose, and acetaminophen, do not affect the electrochemical response. The real milk sample test showed a high recovery rate (more than 95%). According to the obtained results, this sensor is suitable for practical use for the qualitative detection of H2O2 in real samples, as well as for the quantitative determination of its concentration.

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“…The specific adsorption of acidic functional groups on ZnO NWs may depend on several factors such as hydrophilic interactions 45,46 and ionic electrostatic interactions. [47][48][49] We hypothesized that adding water to the mobile phase increases the recovery ratios of these compounds because water competitively coordinates to ZnO NWs and has a high dielectric constant. 50,51 Fig.…”

Section: Retention Behaviors Of Monosubstituted Benzenes On the Zno-n...mentioning

confidence: 99%

Moderate molecular recognitions on ZnO m-plane and their selective capture/release of bio-related phosphoric acids

et al. 2022

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ZnO nanostructure-based electrochemical biosensor for Trichinella DNA detection

Cited by 26 publications

References 15 publications

Modification of structure and surface morphology in various ZnO facets via low fluence gold swift heavy ion irradiation

Modification of structure and surface morphology in various ZnO facets via low fluence gold swift heavy ion irradiation

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

Moderate molecular recognitions on ZnO m-plane and their selective capture/release of bio-related phosphoric acids

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