Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions

Xin, Junwei; Miao, Lijing; Chen, Shougang; Wu, Aiguo

doi:10.1039/c2ay25061f

Cited by 75 publications

(29 citation statements)

References 26 publications

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“…15 Upon interactions with P3O10 5-AuNPs, and Cr(III) complexes with P3O10 5-through the cooperative metal-ligand reaction, the aggregation of AuNPs is triggered, followed by an obvious color changes from red to purple, which is consistented with Ref. 19. When AA is present, Cr(VI) can be quickly reduced to Cr(III) by AA, resulting in the aggregation of AuNPs.…”

Section: Methodssupporting

confidence: 72%

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Colorimetric Detection of Ascorbic Acid Based on the Trigger of Gold Nanoparticles Aggregation by Cr(III) Reduced from Cr(VI)

Sui

Liu

et al. 2017

ANAL. SCI.

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Au nanoparticles (AuNPs) dispersed in water were stabilized by tripolyphosphate (P3O10 5-). When Cr2O7 2-(Cr(VI)) was present, the AuNPs did not change; when Cr 3+ (Cr(III)) was present, the AuNPs would aggregate because of cooperative metal-ligand reaction. Aggregated AuNPs showed different color from the non-aggregated ones. Thus, a simple colorimetric assay was made using AuNPs-Cr(VI) to detect ascorbic acid (AA). Upon introducing AA to the AuNPsCr(VI) system, Cr(VI) was reduced to Cr(III), and the aggregation of AuNPs occurred. This colorimetric assay performed high selectivity and a linear concentration response in the range of 0.2 to 10 μM; its limit of detection was 0.15 μM.

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Section: Methodssupporting

confidence: 72%

“…19 AA can reduce Cr(VI) to Cr(III). Here, we report on a colorimetric assay for the detection of AA based on it.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Detection of Ascorbic Acid Based on the Trigger of Gold Nanoparticles Aggregation by Cr(III) Reduced from Cr(VI)

Sui

Liu

et al. 2017

ANAL. SCI.

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“…Lots of colorimetric techniques based on AuNPs for the determination of different organic compounds [10][11][12][13][14][15][16][17][18], metal ions [19][20][21][22][23][24][25][26][27][28], and other analytes have been suggested for the past ten years. The AuNPs-based colorimetric platform has also found an application for sensing anions, including dihydrophosphate [29,30], hydrophosphate [31], fluoride [32,33], cyanide [34], nitrite [35], sulfide [36], and hypochlorite [37].…”

Section: Introductionmentioning

confidence: 99%

A colorimetric probe based on desensitized ionene-stabilized gold nanoparticles for single-step test for sulfate ions

Arkhipova

Apyari

Дмитриенко

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…Because of cheap and simple preparation, Au and Ag colloid solutions are mostly used in sensing methods . But according to possible aggregation of these NPs and their instability in the solution, the assay methods based on colloidal NPs show poor reproducibility and selectivity results.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of nanostructured thin films of Au and Ag nanoparticles synthesized by ascorbic acid on modified glass surface

Rastegarzadeh

Azarkish

Abdali

2015

Surf. Interface Anal.

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a Immobilization of Ag and Au nanoparticles (NPs) synthesized by ascorbic acid on chemically modified glass surface has been studied. 3-[2-(2-Aminoethylamino)ethylamino]propyl-trimethoxysilane (AMPTS), N-(2-aminoethyl)-3-aminopropyltrimethoxysilan, and 3-trimethoxysilyl-1-propanethiol (MSPT) were used as surface modifying agents. To improve immobilization efficiency, the ammonia solution has been used along with the silane reagents, which assisted to adsorb the metal NPs on glass surface. It was found that AMPTS and MSPT have considerable effect on deposition of Ag and AuNPs on glass substrate. The fabricated thin films were characterized by using UV-Vis spectroscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy and subjected to antimicrobial resistance test. The UV-Vis spectra show a distinctive plasmon resonance absorbance peak for thin films of Au and AgNPs prepared with MSPT and AMPTS, respectively. Atomic force microscopy images indicate that formation of Au and AgNPs with spherical morphology after immobilization on the glass substrate and also the dimensions of NPs on the surface appear larger than those observed in the parent colloidal solution. Energy-dispersive X-ray spectroscopy measurements confirmed the presence of silver and gold on the modified glass surface, and elemental composition was measured. The Au and AgNPs thin films show antibacterial activity against gram negative (Escherichia coli) and gram positive (Staphylococcus aureus) bacteria in comparison with a blank sample.

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Colorimetric detection of Cr3+ using tripolyphosphate modified gold nanoparticles in aqueous solutions

Cited by 75 publications

References 26 publications

Colorimetric Detection of Ascorbic Acid Based on the Trigger of Gold Nanoparticles Aggregation by Cr(III) Reduced from Cr(VI)

Colorimetric Detection of Ascorbic Acid Based on the Trigger of Gold Nanoparticles Aggregation by Cr(III) Reduced from Cr(VI)

A colorimetric probe based on desensitized ionene-stabilized gold nanoparticles for single-step test for sulfate ions

Preparation and characterization of nanostructured thin films of Au and Ag nanoparticles synthesized by ascorbic acid on modified glass surface

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