Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

Thatai, Sheenam; Khurana, Parul; Prasad, Surendra; Soni, Sarvesh K.; Kumar, Dinesh

doi:10.1016/j.microc.2015.07.006

Cited by 61 publications

(7 citation statements)

References 58 publications

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“…Aggregation of NPs leads to a visual color change that is important for the detection of analyte without complex instruments 29 . Therefore, aggregation mechanism has been utilized to detect several metal ions by using NPs and nanocomposites by our research group 30 – 32 . As compared to AuNPs, AgNPs are more suitable for detection applications because of ~100-fold greater molar extinction coefficient of AgNPs, resulting in higher sensitivity in absorption spectroscopy 33 .…”

Section: Introductionmentioning

confidence: 99%

Mentha-Stabilized Silver Nanoparticles for High-Performance Colorimetric Detection of Al(III) in Aqueous Systems

Sharma

Dhillon

Kumar

2018

Sci Rep

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The present paper reports a facile and selective colorimetric method for the detection of potential environmental and health hazardous metal ions using green synthesized silver nanoparticles (AgNPs). Here the organic functional groups present in the plant extract (Mentha arvensis) are used as reductants and stabilizers in the synthesis of AgNPs. They also provide a suitable binding site to the (Al(III)) analyte in the detection mechanism. The leaf extract of Mentha arvensis was used to synthesize AgNPs at room-temperature and at 80 °C. The AgNPs synthesized at 80 °C exhibit excellent selective colorimetric detection of Al(III). The as-synthesized AgNPs have been characterized, and the synthesis, stabilization of NPs and detection mechanism has also been illustrated by using UV-vis, XPS, FTIR, TEM, EDX, SEM, AAS, and TGA analytical tools and techniques. The selectivity of detection probe was supported by the reaction between probe and metal ions followed first-order kinetics having the highest value of the regression coefficient (R2 = 0.99) for Al(III) and the analysis of thermodynamic parameters. The prepared sensor showed a lower limit of detection (LOD) of 1 nM (S/N = 3.2) in real water samples. The proposed method can be successfully utilized for the detection of Al(III) from both drinking and real water samples at the nanomolar level.

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Section: Introductionmentioning

confidence: 99%

Mentha-Stabilized Silver Nanoparticles for High-Performance Colorimetric Detection of Al(III) in Aqueous Systems

Sharma

Dhillon

Kumar

2018

Sci Rep

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“…Nanoparticles, on aggregation, display a visual color change which is useful for analysis without complex instruments . On the basis of aggregation mechanism, our research team reported many sensors by using nanoparticles and nanocomposites. − Recently, we reported a selective and sensitive sensor for the detection of Cr 3+ and Mn 2+ ions, using green synthesized nanoparticles . There are many other reports on the colorimetric detection of metal ions. , However, to date, very limited reports are available for the detection of Al 3+ based on aggregation of AuNPs − and none for the colorimetric detection of Al 3+ by AgNPs in an aqueous medium, to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Label-Free Colorimetric Nanosensor for the Selective On-Site Detection of Aqueous Al³⁺

Joshi

Painuli

Kumar

2017

ACS Sustainable Chem. Eng.

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Aluminum is a hazardous element, found abundantly in the environment. Although many methods have been reported for the efficient detection of aluminum, an easy and accessible sensor for fast detection of aqueous aluminum has not been devised to date. In this approach, we have synthesized indole-2-carboxylic acid capped silver nanoparticles (I2CA-AgNPs) using a one-pot method and used them as label-free nanosensors for the detection of Al3+ in the presence of interfering metal ions. I2CA-AgNPs were synthesized by two methods at different temperatures. AgNPs synthesized by the heating method were further used as detection probes as they showed a strong and narrow surface plasmon resonance (SPR) peak in the visible region. The sensitivity of the detection probe has been optimized by variations in size and distribution of nanoparticles. Synthesized AgNPs were characterized by UV–vis spectroscopy, high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FT-IR), zeta potential, and dynamic light scattering (DLS) analysis. Based on these results, I2CA-AgNPs could be used as colorimetric sensors to selectively detect the presence of Al3+. Further, results are confirmed by theoretical calculations of binding energy by density functional theory (DFT). Moreover, the nanosensor can also be applied to trace aluminum contamination in different types of water samples. The lower detection limit of the proposed method is 0.01 ppm (S/N = 3) which falls in the permissible limit set by the United States Environmental Protection Agency (USEPA), i.e. 50 ppm.

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“…One way to increase the specificity of the sensors based on SPR, consist in modify it with biomolecules in order to detect interactions: biotin -streptavidin, antibody -antigen, nucleic acid hybridization, protein -carbohydrate, cytochrome -inhibitor, aptamer -protein, toxin -receptor, 3,7-10 etc. Either sensors and biosensors, have applications in detection of drugs, anabolic steroid, opioids, stimulants and some peptide hormones in human organism, 11,12 health, [13][14][15] bacterias, 16,17 viruses, 18,19 allergens, 20,21 pesticides, 13,22,23 industrial safety, 24,25 quality control, [26][27][28] etc. The applications for sensing are very extends, please for more details see recent review of Boken et al 1 and the earlier review of Mayer and Hafner.…”

Section: Chemical Analysis Applicationmentioning

confidence: 99%

Key aspects of surface plasmon resonance spectroscopy for analytical chemistry applications

Madriz¹,

Vargas²

2018

JAPLR

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Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

Cited by 61 publications

References 58 publications

Mentha-Stabilized Silver Nanoparticles for High-Performance Colorimetric Detection of Al(III) in Aqueous Systems

Mentha-Stabilized Silver Nanoparticles for High-Performance Colorimetric Detection of Al(III) in Aqueous Systems

Label-Free Colorimetric Nanosensor for the Selective On-Site Detection of Aqueous Al³⁺

Key aspects of surface plasmon resonance spectroscopy for analytical chemistry applications

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Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

Cited by 61 publications

References 58 publications

Mentha-Stabilized Silver Nanoparticles for High-Performance Colorimetric Detection of Al(III) in Aqueous Systems

Mentha-Stabilized Silver Nanoparticles for High-Performance Colorimetric Detection of Al(III) in Aqueous Systems

Label-Free Colorimetric Nanosensor for the Selective On-Site Detection of Aqueous Al3+

Key aspects of surface plasmon resonance spectroscopy for analytical chemistry applications

Contact Info

Product

Resources

About

Label-Free Colorimetric Nanosensor for the Selective On-Site Detection of Aqueous Al³⁺