Abstract
ZnS materials have been widely used in fluorescence biosensors to characterize different types of stem cells due to their excellent fluorescence effect. In this study, ZnS was prepared by vulcanizing nano-Zn particles synthesized using a DC arc plasma. The composition and structure of the ZnS materials were studied by X-ray diffraction (XRD), and their functional group information and optical properties were investigated by using IR spectrophotometry and UV-vis spectrophotometry. It has been found that the synthesized materials consist of Zn, cubic ZnS, and hexagonal ZnS according to the vulcanization parameters. Crystalline ZnS was gradually transformed from a cubic to a hexagonal structure, and the cycling properties first increase, then decrease with increasing sulfurization temperature. There is an optimal curing temperature giving the best cycling performance and specific capacity: the material sulfurized thereat mainly consists of cubic β-ZnS phase with a small quantity of Zn and hexagonal α-ZnS. The cubic phase ZnS has better conductivity than hexagonal ZnS, as evinced by electrochemical impedance spectroscopy (EIS). The ZnS (as prepared) shows board absorption, which can be used in fluorescence biosensors in cell imaging systems.
Highlights
Fluorescence biosensors are used in qualitative or quantitative analysis by fluorescence enhancement, quenching, or shift of emission wavelength by fluorescence signals; they are used for cell imaging, so organic fluorescent dyes have been developed, including fluorescein, rhodamine, and coumarin. [1, 2] Compared with these traditional organic fluorescent dyes, ZnS nanomaterials, as important II-VI compound semiconductors, have attracted much attention
A zinc precursor was prepared by DC arc plasma method, sulfurized at different temperatures to obtain Zn/ZnS composite powders
The cycling performance gradually increases to a maximum at 300°C, declining thereafter
Summary
Fluorescence biosensors are used in qualitative or quantitative analysis by fluorescence enhancement, quenching, or shift of emission wavelength by fluorescence signals; they are used for cell imaging, so organic fluorescent dyes have been developed, including fluorescein, rhodamine, and coumarin. [1, 2] Compared with these traditional organic fluorescent dyes, ZnS nanomaterials, as important II-VI compound semiconductors, have attracted much attention. ZnS nanomaterials can be thought of as candidate anode materials of lithium-ion batteries, replacing graphite carbon materials [10]. The performance of lithium-ion batteries depends largely on anode materials [11, 12]. The anode performance, will deteriorate due to the large volume changes before and after lithium intercalation. Solvothermal synthesis and microwave synthesis are the main methods used to prepare ZnS [13,14,15,16,17]. Carbon-coated ZnS has been prepared by the solvothermal method in recent years [18]. To prepare ZnS with excellent performance, the new synthetic methods at low cost, with high yield, good stability, and effective elimination of surface defects need to be explored
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