Colorimetric detection of hypochlorite based on the morphological changes of silver nanoprisms to spherical nanoparticles

Sasikumar, Thangarasu; Ilanchelian, Malaichamy

doi:10.1039/c7ay00716g

Cited by 35 publications

(8 citation statements)

References 63 publications

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“…Thus, the ratiometric luminescence detection of HOCl in commercially available cleaners was achieved by recording the changes of fluorescence intensity ratio, I625/I485. By exploiting the absorption spectrum changes of triangular silver nanoprisms (AgNPRs), a colorimetric probe was developed for HOCl detection by Sasikumar and co-workers [307]. In the presence of HOCl, the absorption of AgNPRs at 716 nm was decreased, while a new absorption at 470 nm was formed, resulting in the color changes from blue to yellow.…”

Section: Noble Metal Nanoparticles-based Probesmentioning

confidence: 99%

Bioanalytical methods for hypochlorous acid detection: Recent advances and challenges

Zhang

Song

Yuan

2018

TrAC Trends in Analytical Chemistry

198

109

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Hypochlorous acid (HOCl), a well-known universal disinfectant in clinical practice, plays important roles in immune systems of animal and human bodies. For understanding the roles of HOCl in living systems, a number of approaches, including chemiluminescence, colorimetric, electrochemical and chromatographic methods have been explored. For the detection of HOCl in live organisms, cuttingedge techniques, such as fluorescence/phosphorescence molecular probes, responsive nanoprobes, Raman and activatable photoacoustic sensors, have also been developed recently. In this review, the recent advances in the development of bioanalytical methods for detection of HOCl in environmental and biological specimens were summarized. More specifically, traditional techniques for assay of HOCl in bulk solution were initially discussed, and then fluorescence molecular probes, phosphorescence probes, responsive nanoprobes and other methods for HOCl detection were reviewed, which gives an overview of the developments and applications in bioanalytical methods for HOCl detection.

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Section: Noble Metal Nanoparticles-based Probesmentioning

confidence: 99%

Bioanalytical methods for hypochlorous acid detection: Recent advances and challenges

Zhang

Song

Yuan

2018

TrAC Trends in Analytical Chemistry

198

109

View full text Add to dashboard Cite

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“…To date, a number of fluorescent probes have been reported for detecting ROS and AA. − For example, Wang et al synthesized a reversible fluorescent probe, incorporating a 4-amino-2,2,6,6-tetramethyl-piperidin-1-ol group into a 7-nitrobenzoxadiazole (NBD) fluorophore, for monitoring the ClO – /AA redox cycle in living cells . Meanwhile, a colorimetric method was also popular on account of convenience and visibility. − Many colorimetric sensors have been developed for the detection of HOCl/ClO – and AA in biological and environmental samples. − Recently, a fluorescence/colorimetric dual-mode sensor has attracted much attention because it can not only provide highly sensitive fluorescence assay but also facilitate the visualization of targets by naked eyes. So, it is of great importance to develop probes for real-time detection of ClO – or AA by fluorescence and colorimetric manners.…”

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confidence: 99%

Carbon Dots as Fluorescent/Colorimetric Probes for Real-Time Detection of Hypochlorite and Ascorbic Acid in Cells and Body Fluid

et al. 2019

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Hypochlorite (ClO − ) and ascorbic acid (AA) are reported to have a high correlation with oxidative stress and related diseases, so it is necessary and critical to develop sensitive and fast response sensors to investigate the dynamical variation of these redox substances, especially those sensors which can detect ClO − and AA in real time in two manners. However, it is still an unmet challenge for now. Herein, novel carbon dots (RD-CDs) which can respond to ClO − and AA rapidly, reversibly, and dynamically by fluorescence and colorimetry were synthesized. In the fluorescence manner, the constructed nanosensor possessed high selectivity toward ClO − in the range of 0.1−100 μM with a detection limit of 83 nM, and can be selectively recovered by AA. It endows this sensor with good capacity as a fluorescent probe for dynamic detection of ClO − and AA in living cells, which can be monitored by a fluorescence microscope. In the colorimetric manner, ClO − and AA can be detected by UV−vis in the range of 5−200 μM and 1−30 μM, respectively. The concentrations of ClO − and AA in humor can be measured by RD-CDs in both fluorescence and colorimetric mode. The results above-mentioned demonstrate its great potential in biosensing.

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“…, nonlinear effects occur. Similar observations have been reported previously, e.g ., Ag-involving metallic systems display additional absorption behavior at 340–350 nm, and this includes bipyramidal Au NPs with a rod-shaped Ag shell, AuNRs with an octahedral Ag shell, as well as AgNRs, wires, prisms, cubes, and more complex shapes . Opinions are divided over the detailed origin of this signal; − therefore, it still remains a topic of investigation to date and more effort needs to be expended in order to understand and particularly to manipulate plasmons in such Ag systems.…”

Section: Resultsmentioning

confidence: 99%

Chiral Assembly of Gold–Silver Core–Shell Plasmonic Nanorods on DNA Origami with Strong Optical Activity

et al. 2020

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The spatial organization of metal nanoparticles has become an important tool for manipulating light in nanophotonic applications. Silver nanoparticles, particularly silver nanorods have excellent plasmonic properties, but are prone to oxidation and are therefore inherently unstable in aqueous solutions and salt containing buffers. Consequently, gold nanoparticles have often been favored, despite their inferior optical performance. Bimetallic, i.e. gold-silver core-shell nanoparticles can resolve this issue. We present a method for synthesizing highly stable gold/silver core-shell NRs that are instantaneously functionalized with DNA, enabling chiral self-assembly on DNA origami. The silver shell gives rise to an enhancement of plasmonic properties, reflected here in strongly increased circular dichroism, as compared to pristine gold nanorods. Gold-silver nanorods are ideal candidates for plasmonic sensing with increased sensitivity as needed in pathogen RNA or antibody testing, for non-linear optics and light-funneling applications in surface enhanced Raman spectroscopy. Furthermore, the control of interparticle orientation enables the study of plasmonic phenomena, in particular synergistic effects arising from plasmonic coupling of such bimetallic systems.

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Colorimetric detection of hypochlorite based on the morphological changes of silver nanoprisms to spherical nanoparticles

Abstract: In this work, we have developed a simple, rapid, sensitive and selective colorimetric method for the quantitative determination of hypochlorite (ClO−) ions by using triangular silver nanoprisms (AgNPRs) as a colorimetric probe.

Cited by 35 publications

References 63 publications

Bioanalytical methods for hypochlorous acid detection: Recent advances and challenges

Bioanalytical methods for hypochlorous acid detection: Recent advances and challenges

Carbon Dots as Fluorescent/Colorimetric Probes for Real-Time Detection of Hypochlorite and Ascorbic Acid in Cells and Body Fluid

Chiral Assembly of Gold–Silver Core–Shell Plasmonic Nanorods on DNA Origami with Strong Optical Activity

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