Plasmonic nanoparticles for colorimetric detection of nitrite and nitrate

Sepahvand, Marzieh; Ghasemi, Forough; Hosseini, Hossein Mirseyed

doi:10.1016/j.fct.2021.112025

Cited by 42 publications

(14 citation statements)

References 91 publications

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“…1 to 3 mM in processed meat and cheese. 3 Numerous analytical techniques have been developed for the detection of nitrite, including chemiluminescence, 7 uorescence, 8,9 nanoplasmonic colorimetry, 10 Raman spectroscopy 11 and electrochemistry. [12][13][14] Among these methods, electrochemical detection stands out due to its higher sensitivity, lower cost and adaptability to various applications, making it suitable for widespread use.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive capacitance-based nitrite sensing using polydopamine/AuNPs-modified screen-printed carbon electrode

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Highly sensitive capacitance-based nitrite sensing using polydopamine/AuNPs-modified screen-printed carbon electrode

et al. 2023

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“…Therefore, accurate, simple, and economical control of nitrite and nitrate concentrations is of great importance. Current methods of identifying nitrite and nitrate are mainly expensive and time‐consuming techniques that require the use of toxic chemicals and trained personnel [14–17] …”

Section: Introductionmentioning

confidence: 99%

“…Current methods of identifying nitrite and nitrate are mainly expensive and time-consuming techniques that require the use of toxic chemicals and trained personnel. [14][15][16][17] Recently, nanotechnology has been widely used in the design of sensitive and selective sensors for detection applications. The basis of these sensors is the changes in the properties of nanoparticles (NPs) in interaction with the target analyte, which ultimately leads to the production of measurable signals.…”

Section: Introductionmentioning

confidence: 99%

Accelerated Leaching of Unmodified Gold Nanoparticles for Environmental and Biological Monitoring of Nitrite and Nitrate

2022

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Accurate, simple, and economical control of nitrite and nitrate concentrations is of great importance because of the adverse environmental effects and threats to the food chain of living organisms. Due to the high potential of plasmonic nanoparticles (NPs) especially gold NPs (AuNPs) in sensor design, in this study, we have presented a method for nitrite and nitrate measurement based on leaching of spherical AuNPs. We have utilized a non‐toxic thiol‐containing compound that forms cationic complexes with gold ions and consequently speeds up the leaching process. Therefore, it is possible to measure nitrite ions at room temperature by changing the size of plasmonic NPs and subsequently producing measurable signals, including spectral and color changes. Due to the easy synthesis of spherical NPs, which are the most thermodynamically and kinetically favorable morphology, this probe is simple and cost‐effective with no need for well‐trained personnel. Under optimal conditions, a linear range was obtained from 10.0 to 80.0 μmol L−1 with a limit of detection as low as 0.13 μmol L−1. Nitrate was measured indirectly and after reduction to nitrite by zinc powder. The linear range obtained for nitrate was 1.2 to 3.5 mmol L−1 and the detection limit was as low as 96.2 μmol L−1. Furthermore, the designed probe could determine nitrite and nitrate in environmental, food, and biological samples with high quantitative accuracy. Due to its simplicity and high accuracy, this method can reliably smooth the problems caused by other laboratory methods in measuring nitrite and nitrate.

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“…Several analytical techniques, including chromatography, capillary electrophoresis, chemiluminescence, and electrochemical methods, have been reported to detect nitrate, each one having its strengths and weaknesses [25]. In most of these strategies and the reported colorimetric methods, nitrate should be initially reduced to nitrite by metals [26] or enzymes [27].…”

Section: Introductionmentioning

confidence: 99%

Analyte-restrained silver coating of gold nanostructures: an efficient strategy to advance multicolorimetric probes

Naseri¹,

Ghasemi²

2021

Nanotechnology

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Visual detection based on gold nanorods (AuNRs) has gained tremendous attention in sensing applications owing to the potential for simple, inexpensive, instrument-free, and on-site detection. The proper selection of the mechanism involved in the interaction between the analyte and the nanostructure plays a significant role in designing a selective and multicolorimetric probe for visual purposes. A winning mechanism to develop multicolorimetric probes is the silver metalization of AuNRs. Herein, an unprecedented idea is presented to expand the variety of multicolorimetric sensors relying on the mechanism of silver deposition. We introduce the anti-silver deposition mechanism in which the analyte directly or indirectly restrains the silver coating of AuNRs. To ascertain the anti-silver deposition mechanism, we have exploited the proposed idea for the direct detection of nitrate. The presence of nitrate (as restrainer agent), which was firstly treated with ascorbic acid (as reducing agent), induced a decrease in the spectral blueshift of AuNRs along with diverse sharp color transitions from reddish-orange (blank) to maroon, wine, berry/purple, dark blue, teal, green, seafoam, and mint. The difference in the spectrum area of the probe in the absent (S o) and presence (S) of nitrate were linearly proportional to nitrate concentration in the range of 0.5–5.5 mmol l−1 and the limit of detection was calculated to be 465 μmol l−1. Furthermore, the practicability of the multicolor probe was assessed by the determination of nitrate in complex environmental samples.

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Plasmonic nanoparticles for colorimetric detection of nitrite and nitrate

Cited by 42 publications

References 91 publications

Highly sensitive capacitance-based nitrite sensing using polydopamine/AuNPs-modified screen-printed carbon electrode

Highly sensitive capacitance-based nitrite sensing using polydopamine/AuNPs-modified screen-printed carbon electrode

Accelerated Leaching of Unmodified Gold Nanoparticles for Environmental and Biological Monitoring of Nitrite and Nitrate

Analyte-restrained silver coating of gold nanostructures: an efficient strategy to advance multicolorimetric probes

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