Towards highly selective detection using metal nanoparticles: A case of silver triangular nanoplates and chlorine

Apyari, V. V.; Gorbunova, M. O.; Shevchenko, A. V.; Furletov, Aleksei A.; Волков, П. А.; Гаршев, А.В.; Дмитриенко, С. Г.; Zolotov, Yury A.

doi:10.1016/j.talanta.2017.08.056

Cited by 31 publications

(10 citation statements)

References 39 publications

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“…chlorides. 27,28 Compared to Ag nanoparticles and Ag bulk materials, triangular silver nanoplates have signicant catalytic properties in the shape-dependent electrocatalytic reduction of CO 2 to CO. 29 Nowadays, a variety of synthesis methods have been used to prepare triangular silver nanoplates, including photochemical route, seed-mediated route, electrochemical route, thermal induction route and sonochemical route. 30,31 In 2001, the photochemical route was rst introduced by Mirkin et al as an effective synthesis method for triangular silver nanoplates.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA⁺

et al. 2018

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Section: Introductionmentioning

confidence: 99%

“…chlorides. 27,28 Compared to Ag nanoparticles and Ag bulk materials, triangular silver nanoplates have significant catalytic properties in the shape-dependent electrocatalytic reduction of CO 2 to CO. 29 …”

Section: Introductionmentioning

confidence: 99%

Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA⁺

et al. 2018

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“…Similar methods have been developed based on: fluorescence, chemiluminescence and other colorimetric techniques that show high selectivity with limits of detection in the ppb range. [1][2][3][12][13][14] Although some of these methods mitigate the issue of pH variation, they can be difficult to deploy in-line as required in water distribution networks. They also typically require the addition of a "reagent", which in most cases is not reusable.…”

Section: -Introductionmentioning

confidence: 99%

Electrochemical Detection of Free-Chlorine in Water Samples Facilitated by In-Situ pH Control Using Interdigitated Microelectrodes

O’Riordan¹,

O'Sullivan²,

Lovera³

et al. 2020

Preprint

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Residual free-chlorine concentration in water supplies is a key metric studied to ensure disinfection. High residual chlorine concentrations lead to unpleasant odours and tastes, while low concentrations may lead to inadequate disinfection. The concentration is most commonly monitored using colorimetric techniques which require additional reagents. Electrochemical analysis offers the possibility for in-line analysis without the need for additional reagents. Electrochemical-based detection of chlorine is influenced by the solution pH, which defines the particular chlorine ionic species present in solution. As such, controlling the pH is essential to enable electrochemical based detection of residual chlorine in water. To this end, we explore the application of solid state interdigitated electrodes to tailor the in-situ pH of a solution while simultaneously detecting free-chlorine. Finite element simulations and subsequent electrochemical characterization, using gold interdigitated microelectrode arrays, were employed to explore the feasibility of an in-situ pH control approach. In practice, the approach converted residual chlorine from an initial mixture of two species (hypochlorous acid and hypochlorite ion), to one species (hypochlorous acid). Chlorine detection was shown in water samples using this exploratory method, resulting in a two-fold increase in signal response, compared to measurements without pH control. Finally, tap water samples were measured using the in-situ pH control method and the results showed excellent correlation (within experimental error) with a commercial instrument, demonstrating the efficacy of the developed technique. This work establishes the possibility of deploying an electrochemical based reagent-free, in-line chlorine sensor required for water distribution networks.

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“…The vast majority of studies considered the problems of the synthesis and application of various analytical systems based on isotropic silver nanoparticles [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. Fewer articles were connected with discussing the applications of anisotropic silver nanoparticles, in particular, silver triangular nanoplates (AgTNPs) and different composite materials based on them [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Oxidation of Label-Free Silver Triangular Nanoplates by Peroxides: Main Effects and Sensing Applications

Furletov

Apyari

Гаршев

et al. 2020

Sensors

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Nowadays, analytical systems based on silver triangular nanoplates (AgTNPs) have been shown as good prospects for chemical sensing. However, they still remain relatively poorly studied as colorimetric probes for sensing various classes of compounds. This study shows that these nanoparticles are capable of being oxidized by peroxides, including both hydrogen peroxide and its organic derivatives. The oxidation was found to result in a decrease in the AgTNPs’ local surface plasmon resonance band intensity at 620 nm. This was proposed for peroxide-sensitive spectrophotometric determination. Five peroxides differing in their structure and number of functional groups were tested. Three of them easily oxidized AgTNPs. The effects of a structure of analytes and main exterior factors on the oxidation are discussed. The detection limits of peroxides in the selected conditions increased in the series peracetic acid < hydrogen peroxide < tert-butyl hydroperoxide, coming to 0.08, 1.6 and 24 μmol L−1, respectively. tert-Butyl peroxybenzoate and di-tert-butyl peroxide were found to have no effect on the spectral characteristics of AgTNPs. By the example of hydrogen peroxide, it was found that the determination does not interfere with 100–4000-fold quantities of common inorganic ions. The proposed approach was successfully applied to the analysis of drugs, cosmetics and model mixtures.

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Towards highly selective detection using metal nanoparticles: A case of silver triangular nanoplates and chlorine

Cited by 31 publications

References 39 publications

Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA⁺

Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA⁺

Electrochemical Detection of Free-Chlorine in Water Samples Facilitated by In-Situ pH Control Using Interdigitated Microelectrodes

A Comparative Study on the Oxidation of Label-Free Silver Triangular Nanoplates by Peroxides: Main Effects and Sensing Applications

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Towards highly selective detection using metal nanoparticles: A case of silver triangular nanoplates and chlorine

Cited by 31 publications

References 39 publications

Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA+

Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA+

Electrochemical Detection of Free-Chlorine in Water Samples Facilitated by In-Situ pH Control Using Interdigitated Microelectrodes

A Comparative Study on the Oxidation of Label-Free Silver Triangular Nanoplates by Peroxides: Main Effects and Sensing Applications

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Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA⁺

Preparation of triangular silver nanoplates by silver seeds capped with citrate-CTA⁺