Iron Ion Sensor Based on Functionalized ZnO Nanorods

Khun, Kimleang; Ibupoto, Zafar Hussain; Ali, Syed M. Usman; Chey, Chan Oeurn; Nur, Omer; Willander, Magnus

doi:10.1002/elan.201100494

Cited by 17 publications

(12 citation statements)

References 42 publications

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“…After that the clean glass substrates were placed in the vacuum chamber of (Satis CR 725), for producing a 10 nm layer of titanium as an adhesive surface, and then followed by evaporation of a 100 nm thickness layer of gold. ZnO nanorods were grown on these substrates by the hydrothermal method, which is a low cost, a simple, and a low temperature growth method [19]. After the duration of growth, the nanostructures were characterised by the field emission scanning electron microscopy (FESEM) and it was seen that ZnO nanorods were highly dense and well aligned as shown in Figure 1(a).…”

Section: The Fabrication Of Gold Coated Glass Substrate Andmentioning

confidence: 99%

“…Due to the high surface area to volume ratios, nontoxicity, chemical stability, and enhanced electrochemical response, these nanostructures possess a potential for sensor application [10][11][12][13]. Among the many nanostructures of ZnO, nanorods were largely used for sensing purposes because of their high surface area to volume ratios [14][15][16][17][18][19]. ZnO nanorods are n-type semiconductor material and their electrical characteristics are well defined through the adsorption/desorption properties of chemical substance [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Development of Galactose Biosensor Based on Functionalized ZnO Nanorods with Galactose Oxidase

et al. 2012

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The fabrication of galactose biosensor based on functionalised ZnO nanorods is described. The galactose biosensor was developed by immobilizing galactose oxidase on ZnO nanorods in conjunction with glutaraldehyde as a cross-linker molecule. The IRAS study provided evidence for the interaction of galactose oxidase with the surface of ZnO nanorods. The electromotive force (EMF) response of the galactose biosensor was measured by potentiometric method. We observed that the proposed biosensor has a linear detection range over a concentration range from 10 mM to 200 mM with good sensitivity of89.10±1.23 mV/decade. In addition, the proposed biosensor has shown fast time response of less than 10 s and a good selectivity towards galactose in the presence of common interferents such as ascorbic acid, uric acid, glucose, and magnesium ions. The galactose biosensor based on galactose oxidase immobilized ZnO nanorods has a shelf life more than four weeks.

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Section: The Fabrication Of Gold Coated Glass Substrate Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Galactose Biosensor Based on Functionalized ZnO Nanorods with Galactose Oxidase

et al. 2012

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“…The current diagnosis based on the detection of amino acids in metabolic diseases is carried out using mass spectrometry in tandem (MS/MS) being this method included in the newborns screening program. Others such as enzymatic activity assays , high performance liquid chromatography (HPLC) , capillary electrophoresis coupled with laser‐induced fluorescence or electrochemical detection and genetics tests, are also used in order to confirm the positive results obtained .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical On‐site Amino Acids Detection of Maple Syrup Urine Disease Using Vertically Aligned Nickel Nanowires

2018

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In this work, vertically aligned nickel nanowires‐based electrochemical sensors (v‐NiNWs) for rapid detection of branched‐chain amino acids for a non‐invasive screening of maple syrup urine disease (MSUD), are proposed. v‐NiNWs meet the required features for decentralized clinical diagnosis: easy to operate, fast sensor response and short total analysis times (5 min), as well as low sample consumption (250 ml). The analytical characteristics (for leucine as representative branched‐chain amino acid in MSUD) such as detection limit (8 μM) and linear range (25–700 μM which includes as midpoint the amino acids cut‐off of 250 μM) clearly showed the suitability of v‐NiNWs as new and disposable analytical tool for rapid screening of branched‐chain amino acids in MSUD because of their high capabilities for reliable differentiation between healthy and ill clinical sample profiles. In addition, intra and inter‐electrodes repeatability were excellent with values of RSD≤4 and 9 %, respectively (n=5). This approach opens novel avenues not only for ultrafast diagnosis of MSUD using miniaturized and even disposable devices but also for a future point‐of‐care testing; providing novel alternatives for on‐site decentralized monitoring.

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“…The consequences of this can be fatal (liver damage, mental retardation or even death) if there are not a diagnosis in the first days of life. Nowadays, diagnosis is carried out measuring enzyme activities and some works have used high‐performance liquid chromatography (HPLC) or capillary electrophoresis (CE) coupled with electrochemical detection or laser‐induced fluorescence . However, these techniques usually require a lot of sample and time, and they are not portable.…”

Section: Introductionmentioning

confidence: 99%

Vertically‐Oriented and Shape‐Tailored Electrocatalytic Metal Nanowire Arrays for Enzyme‐Free Galactosemia Rapid Diagnosis

García-Carmona

González

Escarpa

2017

Chemistry A European J

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Metallic catalytic nanowires such as nickel and copper nanowires (NWs) for electrochemical detection of carbohydrates involved in metabolic rare diseases are proposed. NWs were electrodeposited using a polycarbonate membrane template, which was cut with the desired shape, stuck in double-sided adhesive tape, pasted into a non-conductive substrate and in situ removed. This simple and versatile approach allowed to obtain NWs vertically oriented (v-NWs), which are contained in the double-sided adhesive tape, becoming highly versatile. The high specific surface of working electrode in which the transduction is supported exclusively by the nanomaterial yielded a high analytical performance [extremely low fouling for galactose (RSD<2 %; n=25)]. Likewise, v-NWs exhibited a superior analytical performance with respect to commercial sputtered thick-film electrodes showing also a clear advantage related with the price, as well as with non-need clean room facilities. The analytical potency of the new approach was clearly demonstrated towards the fast and reliable diagnosis of galactosemia using precious newborn urine samples compared to standard clinical diagnosis. These results revealed new opportunities for future enzyme-free diagnosis and development of future point-of-care applications.

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Iron Ion Sensor Based on Functionalized ZnO Nanorods

Cited by 17 publications

References 42 publications

Development of Galactose Biosensor Based on Functionalized ZnO Nanorods with Galactose Oxidase

Development of Galactose Biosensor Based on Functionalized ZnO Nanorods with Galactose Oxidase

Electrochemical On‐site Amino Acids Detection of Maple Syrup Urine Disease Using Vertically Aligned Nickel Nanowires

Vertically‐Oriented and Shape‐Tailored Electrocatalytic Metal Nanowire Arrays for Enzyme‐Free Galactosemia Rapid Diagnosis

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