Enzyme-free fluorescence determination of uric acid and trace Hg(II) in serum using Si/N doped carbon dots

Cao, Deliang; Luo, Ya-Xiong; Liu, Weiping; Li, Yongsheng; Gao, Xiu-Feng

doi:10.1016/j.saa.2021.120182

Cited by 29 publications

(13 citation statements)

References 49 publications

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“…The O1s ( Figure 3 e) peak is composed of three subpeaks at 530.6 eV, 531.7 eV, and 532.6 eV, respectively from Si-O, C=O, and C-O groups. As is shown in Figure 3 f, the peaks at 101.8, 102.5, and 103.0 eV in Si (2p) spectrum support the existence of Si-C, Si-O, and Si-N groups, respectively [ 47 , 48 ].…”

Section: Resultsmentioning

confidence: 90%

A Label-Free Fluorescent Sensor Based on Si,N-Codoped Carbon Quantum Dots with Enhanced Sensitivity for the Determination of Cr(VI)

2022

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A signal shut-off probe of Si, N-codoped carbon quantum dots (Si, N-CQDs) was exploited to detect Cr(VI) by fluorescence quenching without the aid of any biomolecules or labeling materials. The sensing system prepared the precursor of diacetone acrylamide and the silane coupling agent 3-aminopropyltriethoxysilane (KH-550) by a simple hydrothermal method, and the quantum yield is as high as 75% Si, N-CQDs. The fluorescence stability and microstructure of the Si, N-CQDs were studied. The Si, N-CQDs has a high sensitivity for detecting Cr(VI) with the linear range of 0–200 μM and the detection limit of 0.995 μM. The quenching mechanism of Si, N-CQDs is attributed to FRET.

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Section: Resultsmentioning

confidence: 90%

A Label-Free Fluorescent Sensor Based on Si,N-Codoped Carbon Quantum Dots with Enhanced Sensitivity for the Determination of Cr(VI)

2022

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“…Si-CDs doped with amino groups have also been reported for the detection of several metal ions in addition to organic identification (Fe 3+ , Fe 2+ , Ag 2+ , Cr 4+ , Hg 2+ , etc.). [44,45,53,55,57,59,81,89,107] The cause of metal ion quenching at the CDs is mostly static quenching. It occurs in a nonfluorescent ground state complex formed by the interaction between the CDs and the quencher.…”

Section: Specific Identification Based On Surface Amino Groupsmentioning

confidence: 99%

Section: Specific Identification Based On Surface Amino Groupsmentioning

confidence: 99%

Organosilicon‐Based Carbon Dots and Their Versatile Applications

Hu,

Wu,

Gong

2023

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Carbon dots (CDs) are a newly discovered type of fluorescent material that has gained significant attention due to their exceptional optical properties, biocompatibility, and other remarkable characteristics. However, single CDs have some drawbacks such as self‐quenching, low quantum yield (QY), and poor stability. To address these issues, researchers have turned to organosilicon, which is known for its green, economical, and abundant properties. Organosilicon is widely used in various fields including optics, electronics, and biology. By utilizing organosilicon as a synthetic precursor, the biocompatibility, QY, and resistance to self‐quenching of CDs can be improved. Meanwhile, the combination of organosilicon with CDs enables the functionalization of CDs, which significantly expands their original application scenarios. This paper comprehensively analyzes organosilicon in two main categories: precursors for CD synthesis and matrix materials for compounding with CDs. The role of organosilicon in these categories is thoroughly reviewed. In addition, the paper presents various applications of organosilicon compounded CDs, including detection and sensing, anti‐counterfeiting, optoelectronic applications, and biological applications. Finally, the paper briefly discusses current development challenges and future directions in the field.

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“…Cao et al 145 prepared blue emissive Si/N-CDs using 3-aminopropyl-triethoxysilanes (APTEs) and citric acid (CA) via a hydrothermal method for the detection of Hg 2+ and UA. The developed analytical strategy exhibited a wider concentration range from 0.5 to 30 μM, which offers a LOD of 0.14 μM.…”

Section: Applications Of Carbon Dotsmentioning

confidence: 99%

Recent developments in carbon dot-based green analytical methods: new opportunities in fluorescence assays of pesticides, drugs and biomolecules

et al. 2022

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Enzyme-free fluorescence determination of uric acid and trace Hg(II) in serum using Si/N doped carbon dots

Cited by 29 publications

References 49 publications

A Label-Free Fluorescent Sensor Based on Si,N-Codoped Carbon Quantum Dots with Enhanced Sensitivity for the Determination of Cr(VI)

A Label-Free Fluorescent Sensor Based on Si,N-Codoped Carbon Quantum Dots with Enhanced Sensitivity for the Determination of Cr(VI)

Organosilicon‐Based Carbon Dots and Their Versatile Applications

Recent developments in carbon dot-based green analytical methods: new opportunities in fluorescence assays of pesticides, drugs and biomolecules

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