Thioglycolic acid-capped CuInS2/ZnS quantum dots as fluorescent probe for cobalt ion detection

Zi, Lili; Huang, Yu; Yan, Zhengyu; Liao, Shenghua

doi:10.1016/j.jlumin.2013.12.051

Cited by 71 publications

(31 citation statements)

References 33 publications

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“…[2][3][4] Various 2 methods such as atomic absorption spectrometry, ICP-AES, chemiluminescence and fluorescence spectroscopy have been developed for Co 2+ detection. [5][6][7][8] However, most of the methods have the disadvantages of crucial pH, long time and tedious process, complicated operation and high cost which restrict their applications. While fluorescent probes show excellent high sensitivity and simplicity and are becoming promising analytical methods.…”

Section: Introductionmentioning

confidence: 99%

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

et al. 2016

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A simple method was designed for detecting cobalt ions (Co 2+ ) based on the analyte induced fluorescence quenching of carbon dots (CDs). CDs with a quantum yield of 38.7% were synthesized by hydrothermal treatment of carbopol 934 and diethylenetriamine. Through the metal-ligand interaction, the prepared CDs can highly sensitive and selective detection of Co 2+ . The color changes (from transparent to brown) of the solution can be clearly seen with naked eye. This effective sensing platform shows high sensitivity and selectivity towards Co 2+ . Moreover, the CDs are also successfully utilized for monitoring natural water quality about Co 2+ contents.

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Section: Introductionmentioning

confidence: 99%

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

et al. 2016

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“…Co in compound forms mainly occurs as Co 2+ , which is commercially and environmentally obtainable. (54) In addition, it is the 33rd most abundant element that can be found in almost all media, including water, air, soil, and sediment. Co 2+ is one of the most important transition metals, which has been widely used in industries.…”

Section: Introductionmentioning

confidence: 99%

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Saleviter¹,

Fen²,

Omar³

et al. 2020

Sensors and Materials

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Label-free measurements of small-molecule binding interactions are of high interest to researchers across multiple scientific disciplines. Label-free optical sensors based on surface plasmon resonance (SPR) have been widely used for detecting various targets including toxic heavy metals in solutions. In this research, an SPR optical sensor enhanced with a 4-(2-pyridylazo)-resorcinol (PAR)-based composite layer was employed for the detection of the cobalt ion (Co 2+). A binding analysis study was conducted by monitoring the interaction between Co 2+ and the sensing layer thin film. In our experiment, there were no changes in SPR angle for a gold layer in contact with Co 2+ of different concentrations, whereas the enhanced SPR sensor produced a maximum SPR angle shift of 0.328°. From the relationship between the angle shift and the concentration of Co 2+ , the sensor had a sensitivity of 0.2375° ppm −1 for concentrations of less than 1 ppm, 0.0044° ppm −1 for concentrations of 1 to 10 ppm, and 0.00069° ppm −1 for concentrations from 10 to 100 ppm. Further analysis was also carried out by calculating the full width at half maximum (FWHM), detection accuracy (DA), and signal-tonoise ratio (SNR). In the binding analysis, the experimental results were fitted with Langmuir, Freundlich, and Sips isotherm equations. It was found that the Sips isotherm equation most closely fitted the experimental data with an R 2 value of 0.96716 and a binding affinity of 1.649 ppm −1 .

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“…In view of the two‐sided effects of Co 2+ on human health, it is necessary to detect the content of cobalt in food. Over the years, various techniques have been explored for Co 2+ detection, including flame atomic absorption spectrometry (AAS), inductively coupled plasma mass spectrometry (ICP‐MS), graphite furnace AAS, electrochemical approaches, ultraviolet (UV)–visible spectroscopy, and fluorescence spectrophotometry . However, the application of AAS and ICP‐MS often requires relatively large volumes of samples and involves large‐sized instruments, which are only suitable for offline analysis.…”

Section: Introductionmentioning

confidence: 99%

Quantitation of cobalt in Chinese tea by surface‐enhanced Raman spectroscopy in combination with the spectral shape deformation quantitative theory

Liu

Chen

Shi

et al. 2018

J Raman Spectroscopy

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A surface-enhanced Raman spectroscopy (SERS) method for the quantification of Co 2+ in Chinese tea was developed in this contribution. SERS-enhancing substrates with a high selectivity for Co 2+ were prepared by attaching 2-(bis (pyridin-2-ylmethyl)amino)ethane-1-thiol onto the surfaces of Ag nanoparticles. A calibration model based on the spectral shape deformation quantitative theory was derived to address the poor reproducibility problem in SERS assays due to the practical impossibility in controlling the number and distribution of "hot spots" on or close to the surface of enhancing substrates. The proposed SERS platform was applied to the quantification of Co 2+ in Chinese tea samples and achieved quite satisfactory quantitative results. The average relative deviation between the quantitative results of the proposed SERS platform and those of inductively coupled plasma mass spectrometry was about 6.0%.It is therefore reasonable to expect that the proposed SERS platform can be a competitive alternative for the quantification of Co 2+ in food samples.

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Thioglycolic acid-capped CuInS2/ZnS quantum dots as fluorescent probe for cobalt ion detection

Cited by 71 publications

References 33 publications

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

Cobalt(ii) ions detection using carbon dots as an sensitive and selective fluorescent probe

Label-free Binding Analysis of 4-(2-Pyridylazo)-resorcinol-based Composite Layer with Cobalt Ion Using Surface Plasmon Resonance Optical Sensor

Quantitation of cobalt in Chinese tea by surface‐enhanced Raman spectroscopy in combination with the spectral shape deformation quantitative theory

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