Nanomaterial-based optical chemical sensors for the detection of heavy metals in water: Recent advances and challenges

Ullah, Nisar; Khan, Ibrahim; Qurashi, Ahsanulhaq

doi:10.1016/j.trac.2018.01.002

Cited by 253 publications

(102 citation statements)

References 71 publications

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“…Currently, new, robust, sensitive, selective, inexpensive, and fast optical [24][25][26], chemical [27,28], and biological [29][30][31][32][33] sensory systems are currently in status of development. Such advances in analytical chemistry are currently tightly connected to nanotechnology [26,28,34]. Moreover, so-called lab-on-paper sensors were also developed for heavy metal determination, as demonstrated for quantification of mercury, silver, copper, cadmium, lead, chromium, and nickel [29].…”

Section: Determining Heavy Metalsmentioning

confidence: 99%

Introductory Chapter: Introducing Heavy Metals

Koller¹,

Saleh²

2018

Heavy Metals

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Section: Determining Heavy Metalsmentioning

confidence: 99%

Introductory Chapter: Introducing Heavy Metals

Koller¹,

Saleh²

2018

Heavy Metals

View full text Add to dashboard Cite

“…Gold nanoparticles-based colorimetric aptasensors are currently used for a wide variety of analytes [17,18]. Further studies focus on the nanoparticle-based detection of metal ions [19,20]. DNA-oligonucleotides can be used as recognition elements for the specific detection of pathogen DNA.…”

Section: Introductionmentioning

confidence: 99%

2-LED-µSpectrophotometer for Rapid On-Site Detection of Pathogens Using Noble-Metal Nanoparticle-Based Colorimetric Assays

et al. 2020

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Novel point-of-care compatible methods such as colorimetric assays have become increasingly important in the field of early pathogen detection. A simple and hand-held prototype device for carrying out DNA-amplification assay based on plasmonic nanoparticles in the colorimetric detection is presented. The low-cost device with two channels (sample and reference) consists of two spectrally different light emitting diodes (LEDs) for detection of the plasmon shift. The color change of the gold-nanoparticle-DNA conjugates caused by a salt-induced aggregation test is examined in particular. A specific and sensitive detection of the waterborne human pathogen Legionella pneumophila is demonstrated. This colorimetric assay, with a simple assay design and simple readout device requirements, can be monitored in real-time on-site.

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“…Alternatively, the colorimetric approaches based on modified gold nanoparticles (GNPs) are widely applied due to their unique optical properties [20]. Aggregation of GNPs modified with receptor molecules after the addition of metal ions can change the original color of GNPs from red to blue [21][22][23]. However, selective induction of the aggregation should be based on specific recognition of the target metal ion.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Technique for Antimony Detection Based on the Use of Gold Nanoparticles Conjugated with Poly-A Oligonucleotide

et al. 2019

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A simple and rapid positive–negative colorimetric approach to determine the presence of antimony ions based on the use of gold nanoparticles conjugated with oligonucleotide (poly-A sequence) is developed. Colorimetric measurements reveal that the aggregates of modified gold nanoparticles were afforded after adding antimony ions, thus changing the solution color from pink to blue. The results of aptamer’s interaction on the gold nanoparticle surface with the target analyte can be detected either by photometry or by the naked eye. The realized assay provides rapid (2 min), sensitive (detection limit 10 ng/mL), specific, and precise (variation coefficient less than 3.8%) detection of antimony (III) in drinking water.

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Nanomaterial-based optical chemical sensors for the detection of heavy metals in water: Recent advances and challenges

Cited by 253 publications

References 71 publications

Introductory Chapter: Introducing Heavy Metals

Introductory Chapter: Introducing Heavy Metals

2-LED-µSpectrophotometer for Rapid On-Site Detection of Pathogens Using Noble-Metal Nanoparticle-Based Colorimetric Assays

Colorimetric Technique for Antimony Detection Based on the Use of Gold Nanoparticles Conjugated with Poly-A Oligonucleotide

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