Water-Soluble Silicon Quantum Dots with Quasi-Blue Emission

Wang, Yun; Wang, Hao; Guo, Jun; Wu, Jiang; Gao, Li; Sun, Yinghui; Zhao, Jie; Zou, Gui F.

doi:10.1186/s11671-015-1012-2

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…Various physical and chemical processes such as electrochemical etching, , sol–gel method, , laser ablation, , thermal annealing, thermal vaporization, and inverse micelle − are available for the synthesis of the SQDs. Among these, though the inverse micelle is robust one, it has two major drawbacks: (i) easy aerial oxidation at room temperature and (ii) water insolubility.…”

Section: Introductionmentioning

confidence: 99%

Silicon Quantum Dot-Based Fluorescent Probe: Synthesis Characterization and Recognition of Thiocyanate in Human Blood

et al. 2018

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Allylamine-functionalized silicon quantum dots (ASQDs) of high photostability are synthesized by a robust inverse micelle method to use the material as a fluorescent probe for selective recognition of thiocyanate (a biomarker of a smoker and a nonsmoker). The synthesized ASQDs were characterized by absorption, emission, and Fourier transform infrared spectroscopy. Surface morphology is studied by transmission electron microscopy and dynamic light scattering. The synthesized material exhibits desirable fluorescence behavior with a high quantum yield. A selective and accurate (up to 10–10 M) method of sensing of thiocyanate anion is developed based on fluorescence amplification and quenching of ASQDs. The sensing mechanism is investigated and interpreted with a crystal clear mechanistic approach through the modified Stern–Volmer plot. The developed material and the method is applied to recognize the anion in the human blood sample for identification of the degree of smoking. The material deserves high potentiality in the field of bio-medical science.

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Section: Introductionmentioning

confidence: 99%

Silicon Quantum Dot-Based Fluorescent Probe: Synthesis Characterization and Recognition of Thiocyanate in Human Blood

et al. 2018

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Silicon Quantum Dots: From Synthesis to Bioapplications

Stan

Sima

Dinischiotu

2017

Bioactivity of Engineered Nanoparticles

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Silicon nanoparticles coated with an epitope-imprinted polymer for fluorometric determination of cytochrome c

Zhang

Qin

et al. 2018

Microchim Acta

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The authors describe a composite consisting of silicon nanoparticles that were first coated with SiO and then with a molecularly imprinted polymer (SiNP@SiO@MIP). The MIP was generated by dual epitope imprinting such that it can recognize cytochrome c (Cyt c). The MIP on the NPs was prepared from the functional monomer zinc(II) acrylate (ZnA), the crosslinker ethylene glycol dimethacrylate and the initiator 2,2'-azoisobutyronitrile. Dual epitope templates for Cyt c included (a) a C-terminal nonapeptide (AYLKKATNE), and (b) an N-terminal nonapeptide (GDVEKGKKI). The chelation between Zn(II) of ZnA and the amino groups or hydroxy groups of the template nonapeptides warrants good recognition and capture of Cyt c. The fluorescence originating from SiNPs has excitation/emission peaks at 360/480 nm and is quenched by Cyt c in the 0.50-40.0 μM concentration range. The correlation coefficient for the calibration plot of the imprinted NPs is 0.9937. The detection limit is 0.32 ± 0.01 μM, the precisions of six replicate detections at levels of 0.5, 20 and 40 μM Cyt c are 3.2, 2.7 and 2.8%, respectively, and the imprinting factor is 2.43. Compared to single epitope template imprinting, dual epitope imprinting results in improved selectivity. The imprinted nanoparticles can discriminate Cyt c even if one amino acid is mismatched. The method was applied to the determination of Cyt c in spiked diluted human serum and gave recoveries between 94.0 and 107.5%. Graphical Abstract A fluorescent material of the architecture silicon nanoparticle@SiO@molecularly imprinted polymer (SiNP@SiO@MIP) was fabricated by dual epitope imprinting and a metal-chelating method. The chelation between Zn(II) of the functional monomer zinc(II) acrylate and the amino groups or hydroxy groups of template warrants that the material recognizes and captures cytochrome c well, and this results in fluorescence quenching.

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Water-Soluble Silicon Quantum Dots with Quasi-Blue Emission

Cited by 6 publications

References 26 publications

Silicon Quantum Dot-Based Fluorescent Probe: Synthesis Characterization and Recognition of Thiocyanate in Human Blood

Silicon Quantum Dot-Based Fluorescent Probe: Synthesis Characterization and Recognition of Thiocyanate in Human Blood

Silicon Quantum Dots: From Synthesis to Bioapplications

Silicon nanoparticles coated with an epitope-imprinted polymer for fluorometric determination of cytochrome c

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