FeS2/WS2 Heterostructure: A Promising Candidate for Mild-Temperature Photothermal Therapy with Enhanced Photodynamic Effect and Antibacterial Activity

IF 2.6 4区 医学 Q2 PHARMACOLOGY & PHARMACY
Abdurrahman Mustafa, Ahmed AlSarori, Hasan Akyıldız, Ismail Cihan Kaya, Gulcihan Guzel Kaya
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Abstract

FeS2, a member of metal chalcogenide semiconductors, is a cheap and available material with distinguishable photothermal activity under light irradiation. However, its photodynamic properties have to be improved for practical phototherapy applications. Therefore, in this study, FeS2/WS2 p-n junctions, comprising varying amounts of WS2, are synthesized using the simple hot injection method. Establishment of the heterostructure is verified using X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) analysis. p-n junction formation is further validated via calculations based on ultraviolet-visible (UV–vis.) spectrophotometer and XPS data. Photothermal and photodynamic properties of the samples are examined considering various aspects. The FeS2/WS2 heterostructure provides a heating response above 50 °C with a high photothermal conversion efficiency of 52.6%. The reactive oxygen species (ROS) formation ability is observed to depend on the material concentration and O2 is determined as the primary reactive oxygen species. The in vitro antibacterial activity of the samples is tested against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria as a function of material concentration. At all concentrations, the FeS2/WS2 heterostructure exhibits higher activity than that of FeS2 nanoparticles. The efficiency of the sample against S. aureus and E. coli is calculated to be 100% and 99.4% respectively, at a low material concentration of 100 µg mL−1.

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FeS2/WS2异质结构:具有增强光动力效应和抗菌活性的温和光热治疗候选材料
FeS2是金属硫系半导体的一种成员,是一种廉价且可用的材料,在光照射下具有明显的光热活性。然而,它的光动力学性质必须得到改善,以实际光疗应用。因此,本研究采用简单的热注射法合成了含有不同量WS2的FeS2/WS2 p-n结。利用x射线衍射(XRD)、扫描透射电子显微镜(STEM)、能量色散x射线能谱(EDX)和x射线光电子能谱(XPS)分析验证了异质结构的建立。通过基于紫外可见分光光度计和XPS数据的计算进一步验证了p-n结的形成。从各个方面考察了样品的光热和光动力性能。FeS2/WS2异质结构可在50°C以上提供加热响应,光热转换效率高达52.6%。观察到活性氧(ROS)的形成能力取决于材料的浓度,并确定O2•为主要活性氧。样品对金黄色葡萄球菌(S. aureus)和大肠杆菌(E. coli)细菌的体外抗菌活性随材料浓度的变化而变化。在所有浓度下,FeS2/WS2异质结构均表现出比FeS2纳米颗粒更高的活性。在100µg mL−1的低物质浓度下,样品对金黄色葡萄球菌和大肠杆菌的效率分别为100%和99.4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advanced Therapeutics
Advanced Therapeutics Pharmacology, Toxicology and Pharmaceutics-Pharmaceutical Science
CiteScore
7.10
自引率
2.20%
发文量
130
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