Simple optical determination of silver ion in aqueous solutions using benzo crown-ether modified gold nanoparticles

Haghnazari, Nahid; Alizadeh, Abdolhamid; Karami, Changiz; Hamidi, Zohreh

doi:10.1007/s00604-012-0928-9

Cited by 39 publications

(9 citation statements)

References 36 publications

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“…They reported an interesting discrimination between short (24 bp) single strength DNA (ssDNA) and double strength DNA (dsDNA) based on electrostatic interactions. Based on this study, the complex Au-NPs / DNA aptamers was investigated as colorimetric probe for ions [16,24,25], small molecules [26][27][28][29] or proteins.…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

et al. 2014

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We have explored the potential of using gold nanoparticles (Au-NPs) in optical and bare-eye discrimination of (a) proteins (such as bovine serum albumin and lysozyme), (b) homo-polynucleotides (such as poly-adenylic acid, polycytidylic acid, poly-uridylic acid and poly-inosinic acid), and (c) long chain DNA (from salmon, herring and thym). Such biomacromolecules can be detected and discriminated due to their ability to prevent the formation of blue aggregates from red (non-aggregated) citrate capped Au-NPs on addition of NaCl. The effect of these biomacromolecules on the aggregation was investigated by colorimetry and UV-vis spectrometry. The results show that the two proteins can be differentiated by colorimetry, and also salmon ssDNA and dsDNA. The AuNPs can also discriminate the dsDNAs of salmon and herring. We conclude that the use of Au-NPs represent a viable candidate to future methods of DNA analysis on the basis of visual testing, particularly in the area of food analysis.

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Section: Introductionmentioning

confidence: 99%

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

et al. 2014

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“…[15,16,17,18,19]. Trace amounts of Ag + will harmless to people, but the U.S. Environmental Protection Agency reports that Ag + could be harmful to fish and microorganisms when the concentration of Ag + is higher than 1.6 nM [20]. According to the World Health Organization (WHO), the limitation of Ag + in drinking water is 0.05 mg/L (467 nM) [21].…”

Section: Introductionmentioning

confidence: 99%

L-Aspartic Acid Capped CdS Quantum Dots as a High Performance Fluorescence Assay for Sliver Ions (I) Detection

et al. 2019

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A new high performance fluorescence assay for detection of Ag+ based on CdS quantum dots (QDs) using L-Aspartic acid (L-Asp) as a stabilizer was proposed in this work. The CdS quantum dots conjugation with L-Aspartic acid (L-Asp@CdS QDs) were successfully synthesized via a simple hydrothermal process. The QDs have a fluorescence emission band maximum at 595 nm with a quantum yield of 11%. The obtained CdS QDs exhibit a particle size of 1.63 ± 0.28 nm and look like quantum dot flowers. Basically, the fluorescence intensity of L-Asp@CdS QDs can be enhanced only upon addition of Ag+ and a redshift in the fluorescence spectrum was observed. Under optimum conditions, the fluorescence enhancement of L-Asp@CdS QDs appeared to exhibit a good linear relationship in between 100–7000 nM (R2 = 0.9945) with the Ag+ concentration, with a detection limit of 39 nM. The results indicated that the L-Asp@CdS QDs were well used in detection for Ag+ as fluorescence probe in aqueous solution with high sensitivity and selectivity. Moreover, the sensing system has been applied in detection Ag+ in real water samples. The recovery test results were 98.6%~113%, and relative standard deviation (n = 5) is less than 3.6%, which was satisfactory.

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“…It gives a strong surface plasmon resonance (SPR) absorption peak in the UV‐visible region. Therefore, it is used as sensor for detection of DNA, melamine, alkali metals and heavy metals ions . Further, it has many applications in the field of catalysis and biology.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is used as sensor for detection of DNA, melamine, alkali metals and heavy metals ions. [16][17][18][19][20][21] Further, it has many applications in the field of catalysis and biology. Basically, SPR technique can be applied for the different studies such as bimolecular interactions detection, [22] plasma coagulation detection [23] and SPR imaging for protein/DNA, nucleic acids and protein-protein interactions.…”

Section: Introductionmentioning

confidence: 99%

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

et al. 2019

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An efficient and eco‐friendly approach is adopted for the synthesis of highly stable L‐alanine assisted nano gold based polyvinyl alcohol nanocomposite hybrid films (Au/PVA).The –COOH groups of L‐alanine and oxygeneous groups of polyvinyl alcohol are utilized for the synthesis of size controlled gold nanoparticles. The as‐synthesized nanocomposites show rapid and selective detection of Cu2+ ion in aqueous medium. With addition Cu2+ ion to as‐synthesized nanocomposites, the SPR peaks of Au NPs (538 nm) decrease with occurrence of a red shift as well as a new peak is observed at higher wavelength which is due to the aggregation of gold nanoparticles in the nanocomposites hybrid films. Scanning electron microscope (SEM) micrograph and energy dispersive spectroscopy (EDS) reveal the aggregation of gold nanoparticles in the nanocomposite hybrid films. The limit of detection and limit of quantification for Cu2+ ion are 40 nM and 133 nM respectively. This technique for detection of Cu2+ ion in waste water samples is inexpensive and eco‐friendly since no any toxic chemicals are used. In the presence of Cu2+ ion, the colour of the hybrid film is changed hence, this method also involves visual detection of Cu2+ ion without use of electrolyte or transducer. Further, many reported methods represent the in situ monitoring of Cu2+ ion, but the present hybrid film can be used for in situ as well as ex situ monitoring of Cu2+ ion.

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Simple optical determination of silver ion in aqueous solutions using benzo crown-ether modified gold nanoparticles

Cited by 39 publications

References 36 publications

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

L-Aspartic Acid Capped CdS Quantum Dots as a High Performance Fluorescence Assay for Sliver Ions (I) Detection

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions

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Simple optical determination of silver ion in aqueous solutions using benzo crown-ether modified gold nanoparticles

Cited by 39 publications

References 36 publications

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

L-Aspartic Acid Capped CdS Quantum Dots as a High Performance Fluorescence Assay for Sliver Ions (I) Detection

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu2+ ions

Contact Info

Product

Resources

About

Nano Gold Hybrid Polyvinyl Alcohol Films for Sensing of Cu²⁺ ions