NDLI: Colorimetric detection of Cd$^{2+}$ using 1-amino-2-naphthol-4-sulfonic acid functionalized silver nanoparticles

Content Provider	Springer Nature Link
Author	Huang, Pengcheng Liu, Bowen Jin, Weiwei Wu, Fangying Wan, Yiqun
Copyright Year	2016
Abstract	A colorimetric assay has been developed for facile, rapid, and sensitive detection of Cd$^{2+}$ using 1-amino-2-naphthol-4-sulfonic acid functionalized silver nanoparticles (ANS-AgNPs). The presence of Cd$^{2+}$ induces the aggregation of ANS-AgNPs through cooperative metal–ligand interaction. As a result, the characteristic surface plasmon resonance (SPR) peak of ANS-AgNPs at 390 nm was red-shifted to 580 nm, yielding a color change from bright yellow to reddish-brown. The color change is monitored by UV–Vis spectrometer and can be directly read out by the naked eye. Under the optimized conditions, a good linear relationship (correlation coefficient R = 0.997) was obtained between the ratio of the absorbance at 580 nm to that at 390 nm (A$_{580nm}$/A$_{390nm}$) and the concentration of Cd$^{2+}$ over the range of 1.0–10 μM with detection limit of 87 nM. The proposed method is simple and efficient, which has been applied for determining Cd$^{2+}$ in milk powder, serum, and lake water with satisfactory results. Graphical abstract The bare AgNPs were functionalized with ANS and used as sensors for the colorimetric detection of Cd2+ by taking advantage of metal chelation of Cd2+ with the hydroxyl group (–OH) and amino group(–NH2) of ANS on the surface of AgNPs, which resulted in an appreciable colo r changed from bright yellow to reddish-brown.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	18
Issue Number	11
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-11-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silver nanoparticles 1-Amino-2-naphthol-4-sulfonic acid Colorimetric assay Cd$^{2+}$ Sensors Colloids Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Lasers, Photonics, Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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