A smartphone-integrated optical sensing platform based on Lycium ruthenicum derived carbon dots for real-time detection of Ag+

Tang, Siyuan; Chen, Da; Guo, Guoqiang; Li, Xiameng; Wang, Changxing; Li, Tingting; Wang, Gang

doi:10.1016/j.scitotenv.2022.153913

Cited by 31 publications

(9 citation statements)

References 52 publications

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“…Besides, DNA is labile and is easily degraded, thus presenting challenges to assay´s robustness. Compared with the fluorometric assays 11 , 12 , the proposed TA/PUL-AuNPs probe shows, similar LOD and linear range, however, from the read-out devices, the TA/PUL-AuNPs based on the use of UV–Vis spectrophotometer is more affordable than the simplest fluorimeter. Thus, it can easily be used in economically challenging settings.…”

Section: Resultsmentioning

confidence: 97%

“…Reported detection methods for Ag + are, inductively coupled plasma-mass spectrometry (ICP-MS) 6 , atomic absorption/emission spectroscopy (AAS/AES) 7 , 8 . Electrochemical methods using carefully fabricated electrode 9 , 10 , detection assays based on fluorescence 11 , 12 . Others include, metal nanoparticles (MNPs) based colorimetric assays 13 – 15 .…”

Section: Introductionmentioning

confidence: 99%

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Toxic Ag+ detection based on Au@Ag core shell nanostructure formation using Tannic acid assisted synthesis of Pullulan stabilized gold nanoparticles

Jayeoye

Supachettapun

Muangsin

2023

Sci Rep

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Herein, a sensitive colorimetric detection strategy is proposed for Ag+ detection based on the use of environmentally friendly synthesis of gold nanoparticles (AuNPs), at room temperature, using (tannic acid, TA), as the reductant and pullulan (PUL) as stabilizing agent. The colloidal solution (TA/PUL-AuNPs), at the optimal synthesis conditions, showed maximum absorbance at 529 nm with a berry red color. TEM and FESEM validated that the particles are spherical and monodispersed, while other characterization results elucidated the role of pullulan in the nano-synthesis. Ag+ addition to the probe (TA/PUL-AuNPs), pH 11, resulted in naked-eye color changes, owing to Au@Ag core shell nanostructure formation. Further, the added Ag+ is reduced to AgNPs, on the surface of the TA/PUL-AuNPs probe. A hypsochromic shift in the absorption maximum, from 529 to 409 nm was observed, while (AAg+-Abl)@409 nm exhibited linearity with Ag+ concentrations, from 0.100 to 150 µM. The estimated limit of detection was 30.8 nM, which is far lower than the acceptable limit of 0.930 µM from the regulatory agency. The TA/PUL-AuNPs probe was further tested for Ag+ detection in lake water samples, and it displayed satisfactory detection performances for real sample applications.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Toxic Ag+ detection based on Au@Ag core shell nanostructure formation using Tannic acid assisted synthesis of Pullulan stabilized gold nanoparticles

Jayeoye

Supachettapun

Muangsin

2023

Sci Rep

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“…In order to explore the practicability of CQDs sensor, we further carried out a real addition and recovery experiment with reference to previous research 15,16 . For the experiment of Cr 6+ addition and recovery in actual water samples, tap water samples in the laboratory and Xinghu lake water samples from Wuhan university were selected as experimental water samples, and the lake water samples were filtered with a 0.22 μm microporous membrane.…”

Section: Methodsmentioning

confidence: 99%

Preparation of biomass water‐soluble carbon quantum dots and their application in Cr (VI) ions detection

et al. 2023

Packag Technol Sci

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To quickly and quantitatively detect the concentration of harmful Cr 6+ in food and packaging, biomass nitrogen-doped blue fluorescent carbon quantum dots (CQDs) were synthesized by a one-step hydrothermal method using longan peel. The synthesized biomass CQDs are spherical, and the particle size is distributed between 1 and 6 nm. There are functional groups such as carboxyl, hydroxyl and amino groups on the surface of the CQDs, which promotes the excellent water dispersibility of the CQDs. CQDs have good fluorescence stability in salt solutions, different pH environments and long-term storage. A fluorescence sensor for detecting Cr 6+ was constructed, based on the specific quenching effect of Cr 6+ on the fluorescence of CQDs. There is a good linear relationship between the fluorescence quenching rate of the fluorescence sensor and the Cr 6+ concentration of the detected sample. The sensor has a linear range of 20-200 μM and a detection limit of 1.4 μM. In addition, the CQDs fluorescence sensor has an ideal recovery rate in the actual water sample spiked with Cr 6+ . This research innovatively combined longan and hydrothermal method to prepare a quantitative, fast and wide detection limit Cr 6+ sensor.

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“…For example, Tang et al provided a smartphone-based platform for the real-time detection of Ag + in lake water. Based on the lyceum ruthenium derived carbon dots, the smartphone platform with the color (red–green–blue, RGB) analysis software were used to capture and analyze fluorescence images, accomplishing sensitive and reliable detection of Ag + [ 15 ]. Xiao et al developed a smartphone-based sensing system combined with a custom design App for rapid and easy detection of Hg + , Pb 2+ , and Cu 2+ in the Pearl River water samples, showing satisfactory analytical performance [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

A Portable Smartphone-Based System for the Detection of Blood Calcium Using Ratiometric Fluorescent Probes

Zhang

et al. 2022

Biosensors

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Hypocalcemia is a disease that adversely affects the production and reproduction of dairy cows. A portable device for rapid bovine blood calcium sensing has been growing in demand. Herein, we report a smartphone-based ratiometric fluorescence probe (SRFP) platform as a new way to detect and quantify calcium ions (Ca2+) in blood serum. Specifically, we employed a cost-effective and portable smartphone-based platform coupled with customized software that evaluates the response of Ca2+ ions to ratiometric fluorescence probe in bovine serum. The platform consists of a three-dimensional (3D) printed housing and low-cost optical components that excite fluorescent probe and selectively transmit fluorescence emissions to smartphones. The customized software is equipped with a calibration model to quantify the acquired fluorescence images and quantify the concentration of Ca2+ ions. The ratio of the green channel to the red channel bears a highly reproducible relationship with Ca2+ ions concentration from 10 μM to 40 μM in bovine serum. Our detection system has a limit of detection (LOD) of 1.8 μM in bovine serum samples and the recoveries of real samples ranged from 92.8% to 110.1%, with relative standard deviation (RSD) ranging from 1.72% to 4.89%. The low-cost SRFP platform has the potential to enable campesino to rapidly detect Ca2+ ions content in bovine serum on-demand in any environmental setting.

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A smartphone-integrated optical sensing platform based on Lycium ruthenicum derived carbon dots for real-time detection of Ag+

Cited by 31 publications

References 52 publications

Toxic Ag+ detection based on Au@Ag core shell nanostructure formation using Tannic acid assisted synthesis of Pullulan stabilized gold nanoparticles

Toxic Ag+ detection based on Au@Ag core shell nanostructure formation using Tannic acid assisted synthesis of Pullulan stabilized gold nanoparticles

Preparation of biomass water‐soluble carbon quantum dots and their application in Cr (VI) ions detection

A Portable Smartphone-Based System for the Detection of Blood Calcium Using Ratiometric Fluorescent Probes

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