A novel fluorescence probe for rapid and sensitive detection of tetracyclines residues based on silicon quantum dots

Liu, Zhenping; Hou, Jingzhou; Wang, Xianfeng; Hou, Changjun; Zhong, Jianxin; He, Qiang; Huo, Danqun

doi:10.1016/j.saa.2020.118463

Cited by 61 publications

(28 citation statements)

References 64 publications

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“…As shown in Figure 1a, the peak appearing at 590 cm −1 is assigned to the Mo-S vibration [27], the peak at 1010 cm −1 corresponds to the S-O stretching [28], and the peak at 1413 cm −1 is attributed to C-O stretching vibration [29]. For MoS 2 , the peaks observed at 1132 and 1651 cm −1 are attributed to the C-H bending vibration [27] and the existence of C=O stretching vibration [30]. For Si/MoS 2 , the absorption peak at 1106 cm -1 is ascribed to the characteristic stretching of the Si-O-Si band [31].…”

Section: Resultsmentioning

confidence: 96%

Si Quantum Dots Assist Synthesized Microflower-Like Si/MoS2 Composites for Supercapacitors

et al. 2020

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The microflower-like Si/MoS2 composites were fabricated using Si quantum dots (QDs) to assist a facile hydrothermal method. The electrochemical performance of Si/MoS2 composite in symmetric and asymmetric systems was studied. Electrochemical characterization revealed that the Si/MoS2 composite electrode in a three-electrode system has a high specific capacitance of 574.4 F·g−1 at 5 A·g−1. Furthermore, the Si/MoS2 composite electrode in a two-electrode system had the maximum energy density of 27.2 Wh·kg−1 when a power density of 749.1 W·kg−1 was achieved. Therefore, this investigation proves the Si/MoS2 composite microflower-like structure should be a promising candidate electrode material for supercapacitors.

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Section: Resultsmentioning

confidence: 96%

Si Quantum Dots Assist Synthesized Microflower-Like Si/MoS2 Composites for Supercapacitors

et al. 2020

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“…However, under the irradiation of 350 nm ultraviolet light, it would be excited to produce a distinguishable bright blue fluorescence (Figure 4a inset). [42] The fluorescence emission spectra in Figure 4b show that the central quantum emission wavelength of Si-QDs is 460 nm, which belongs to the blue band. [40] Correspondingly, the obtained Si-QDs have bright blue fluorescence.…”

Section: Optical Properties Of Silicon Quantum Dotsmentioning

confidence: 99%

Low‐Cost Water Soluble Silicon Quantum Dots and Biocompatible Fluorescent Composite Films

Guoqian

Qiu³

et al. 2021

Part & Part Syst Charact

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Si-QDs are ultrasmall crystals with the size of only a few nanometers. [10] Based on the original properties of silicon materials, they also possess the unique fluorescence properties of QDs. Compared with traditional organic fluorescent materials, these quantum dots have good electronic properties, large surface-to-volume ratio, [11][12][13] size-dependent and tunable fluorescence emission, increased interband transition probability and high stability for photobleaching, [14][15][16] which make them potential options for the next generation optoelectronic devices, solar cells, and fluorescent biological imaging/sensing reagents. [17,18] In addition, luminescent silicon nanoparticles are chemically engineered to become specific probes to accumulation at sites of interest for labeling and imaging. [19] Generally speaking from the synthesis principle, [20][21][22] there are three classes of methods for manufacturing Si-QDs, such as the top-down methods, the bottom-up methods, and a combination of both. As the name suggests, the top-down method is the decomposition of large pieces of silicon into small nanocrystals. [23] The most common method is based on acid-based etching or electrochemical potential, the advantage of which is that these methods provide good color adjustability by controlling the particle size. In contrast, the bottom-up method uses the principle of self-assembly to construct nanocrystals from smaller chemical components. The construction process of this method is similar to that of traditional quantum dot manufacturing technology and the process is relatively mature. It is worth mentioning that since Raj and his colleagues first reported the synthesis of thiol-terminated cadmium telluride quantum dots in aqueous solution in 1993, most of the work on the synthesis of quantum dots has focused on environmentally friendly, and low-cost methods, which can be directly applied to the hydrothermal method for biological research. [24] Recently, research work on fluorescent polymers such as quantum dots has focused on encapsulating fluorescent materials and realizing their fictionalization and device application. [25,26] Quantum dots can be compounded with other polymers with special functions to form a new type of material. This way of combining the two through physical or chemical means endows the composite material with excellent performance, attracting worldwide attention. So far, there has been much research on semiconductor quantum dots and functional polymer composite materials. These reports also demonstrate great application potential in the fields of photoelectric Silicon quantum dots (Si-QDs) with the advantages of excellent biocompatibility, rich sources of raw materials, and low synthesis cost, are attracting enormous attention as ideal candidates for replacing existing semiconductor quantum dot products. The water-soluble fluorescent Si-QDs and the Si-QDs/Chitosan composite material are successfully prepared here by combined microwave-assisted and traditional one-step hydrothermal synthesis u...

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“…Considering the high side effects and urgent requirement of accurate quantitative analysis of TC, it is still necessary to develop a quick and simple method for the determination of TC. [26][27][28] Fabrication of uorescent probes based on SQDs is an ideal candidate for determination of TC with high sensitivity, selectivity and accuracy.…”

Section: Introductionmentioning

confidence: 99%

Sensitive and selective determination of tetracycline in milk based on sulfur quantum dot probes

Zhang

et al. 2021

RSC Adv.

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A novel fluorescence probe for rapid and sensitive detection of tetracyclines residues based on silicon quantum dots

Cited by 61 publications

References 64 publications

Si Quantum Dots Assist Synthesized Microflower-Like Si/MoS2 Composites for Supercapacitors

Si Quantum Dots Assist Synthesized Microflower-Like Si/MoS2 Composites for Supercapacitors

Low‐Cost Water Soluble Silicon Quantum Dots and Biocompatible Fluorescent Composite Films

Sensitive and selective determination of tetracycline in milk based on sulfur quantum dot probes

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