Nanoelectrode ensembles for the direct voltammetric determination of trace iodide in water

Ugo, Paolo; Moretto, Ligia Maria; Silvestrini, Morena; Pereira, Francisco Claudece

doi:10.1080/03067310902962569

Cited by 13 publications

(7 citation statements)

References 35 publications

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“…First studies performed at the end of the 1990s−beginning 2000s have proven that NEEs are powerful electroanalytical tools for the analysis of small redox molecules with reversible electrochemical behavior, such as ferrocene derivatives, ruthenium complexes, phenothiazines or viologens [ 20 , 72 , 73 ]. It was demonstrated that NEEs can be used for determining iodide anions in ophthalmic drugs [ 44 ] or in natural waters [ 102 ]. Moreover, they can be successfully applied also for the direct detection of trace levels of the complex redox bio-macromolecules such as the heme-protein cytochrome c [ 53 , 103 ].…”

Section: Bio-analytical Applications Of Nees/neas: First Studiesmentioning

confidence: 99%

Nanobiosensing with Arrays and Ensembles of Nanoelectrodes

Karimian

Moretto

Ugo

2016

Sensors

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Since the first reports dating back to the mid-1990s, ensembles and arrays of nanoelectrodes (NEEs and NEAs, respectively) have gained an important role as advanced electroanalytical tools thank to their unique characteristics which include, among others, dramatically improved signal/noise ratios, enhanced mass transport and suitability for extreme miniaturization. From the year 2000 onward, these properties have been exploited to develop electrochemical biosensors in which the surfaces of NEEs/NEAs have been functionalized with biorecognition layers using immobilization modes able to take the maximum advantage from the special morphology and composite nature of their surface. This paper presents an updated overview of this field. It consists of two parts. In the first, we discuss nanofabrication methods and the principles of functioning of NEEs/NEAs, focusing, in particular, on those features which are important for the development of highly sensitive and miniaturized biosensors. In the second part, we review literature references dealing the bioanalytical and biosensing applications of sensors based on biofunctionalized arrays/ensembles of nanoelectrodes, focusing our attention on the most recent advances, published in the last five years. The goal of this review is both to furnish fundamental knowledge to researchers starting their activity in this field and provide critical information on recent achievements which can stimulate new ideas for future developments to experienced scientists.

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Section: Bio-analytical Applications Of Nees/neas: First Studiesmentioning

confidence: 99%

Nanobiosensing with Arrays and Ensembles of Nanoelectrodes

Karimian

Moretto

Ugo

2016

Sensors

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“…The fabrication of 3DNEEs followed the procedure as in our previous paper 24 and literature. 25,31 However due to the high activity of the newly made Oromerse part B gold plating solution, an updated electroless deposition was used for gold growth in the nano pores of PC membranes. An optimized gold plating solution was prepared by dissolving Na 2 SO 3 (0.13 mol L À1 ), 1.5 mL formaldehyde (0.42 mol L À1 ) and 1 mL of Oromerse part B gold solution in 40 mL water.…”

Section: Fabrication Of Popd/3dneesmentioning

confidence: 99%

“…16 In recent years, three dimensional structured nanoelectrode ensembles (3DNEEs) have attracted considerable interest 17 for their outstanding performances in biosensors 18,19 and electrocatalysis [20][21][22] mainly due to their special congurations and large surface areas. [23][24][25] The construction of a biomolecule recognition membrane, on which antibody and antigen are effectively immobilized and recognized, is crucial step for a biosensor assembly. One efficient method is to functionalize the electrode to immobilize as much recognition molecule as possible.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and modeling of an ultrasensitive label free impedimetric immunosensor for Aflatoxin B₁based on poly(o-phenylenediamine) modified gold 3D nano electrode ensembles

Cao

et al. 2015

RSC Adv.

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An ultrasensitive label free impedimetric immunosensor for AFB1 detection was fabricated based on Poly(ophenylenediamine) (PoPD) electropolymerized film modified gold three dimensional nanoelectrode ensembles (3DNEEs). The nanoelectrode ensembles were fabricated by template synthesis in track etched polycarbonate (PC) membranes. Scanning electron microscopy and X-ray diffraction were used for the evaluation of the properties of 3DNEEs. Anti-AFB1 was directionally immobilized on Staphylococcus protein A (SpA) with orientation function. Cyclic voltammetry and electrochemical impedance spectroscopy were employed to characterize the fabrication process and optimize working conditions. The interface model of molecular recognition was constructed and reasonably interpreted. The detection limit was 0.019 ng/mL (S/N=3). The linear detection concentration range of AFB1 was from 0.04 to 8.0 ng/mL.

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“…73 Similar ensembles were used for the direct detection of iodide in saltwater using square wave voltammetry, with the limit of detection in acidied Venice lagoon water being 0.1 mM. 74 It has also been shown to be possible to detect organic materials at these arrays, for example the common herbicide paraquat could be determined with a dynamic range up to 50 mM and a detection limit of 2.0 mM (cf. 10 mM at a gold ultramicroelectrode).…”

Section: Nanoarraysmentioning

confidence: 99%

Arrays of microelectrodes: technologies for environmental investigations

Davis

Higson

2013

Environ. Sci.: Processes Impacts

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Within this work it is our intention to provide an overview of the use of arrays or microelectrodes in the characterisation of environmental samples. Electrochemical methods are often a relatively simple and inexpensive alternative to spectroscopic or chromatographic methods for the analysis of a wide range of analytes. Arrays of microelectrodes display a number of advantages over simple planar macroelectrodes and the reasons for this will be detailed within this work. We will also describe some of the most common methods for constructing microarrays. The application of these arrays for analysis of environmental samples such as soil and water for heavy metal contamination has been the major focus of research in this field and comprises much of this review. However other systems will also be detailed such as determination of various anions or other samples such as pesticides.

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Nanoelectrode ensembles for the direct voltammetric determination of trace iodide in water

Cited by 13 publications

References 35 publications

Nanobiosensing with Arrays and Ensembles of Nanoelectrodes

Nanobiosensing with Arrays and Ensembles of Nanoelectrodes

Fabrication and modeling of an ultrasensitive label free impedimetric immunosensor for Aflatoxin B₁based on poly(o-phenylenediamine) modified gold 3D nano electrode ensembles

Arrays of microelectrodes: technologies for environmental investigations

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Nanoelectrode ensembles for the direct voltammetric determination of trace iodide in water

Cited by 13 publications

References 35 publications

Nanobiosensing with Arrays and Ensembles of Nanoelectrodes

Nanobiosensing with Arrays and Ensembles of Nanoelectrodes

Fabrication and modeling of an ultrasensitive label free impedimetric immunosensor for Aflatoxin B1based on poly(o-phenylenediamine) modified gold 3D nano electrode ensembles

Arrays of microelectrodes: technologies for environmental investigations

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Fabrication and modeling of an ultrasensitive label free impedimetric immunosensor for Aflatoxin B₁based on poly(o-phenylenediamine) modified gold 3D nano electrode ensembles