硒、铕和银修饰的石墨烯量子点的合成及其在光动力治疗中应用潜力的研究。
Synthesis of Graphene Quantum Dots Decorated With Se, Eu and Ag As Photosensitizer and Study of Their Potential to Use in Photodynamic Therapy.
机构信息
Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran.
Physics Department, University of Kashan, Kashan, Iran.
出版信息
J Fluoresc. 2021 Mar;31(2):551-557. doi: 10.1007/s10895-020-02674-0. Epub 2021 Jan 19.
GQDs decorated with europium (Eu), silver (Ag) and selenium (Se) at molar ratios of 0.1%, 0.3% and 0.5% were produced for the first time at different temperatures of 180 °C, 200 °C and 220 °C. Surface passivation was carried out with polyethylene glycol (PEG) to increase the intensity of photoluminescence (PL) of the produced samples. The prepared quantum dots were characterized by X-Ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), transmission electron microscopy (TEM), PL and ultraviolet-visible spectroscopy. GQDs synthesized at 180 °C and decorated with Se (0.3%) had maximum PL intensity along with long lasted afterglow over 90 min compared with other samples. Excitation wavelength at 360 nm produced maximum emission at 600-900 nm and resulted in high singlet oxygen (O ) generation which makes it a good candidate for photodynamic therapy applications.
首次在 180°C、200°C 和 220°C 的不同温度下，制备了摩尔比为 0.1%、0.3%和 0.5%的铕（Eu）、银（Ag）和硒（Se）修饰的 GQDs。通过使用聚乙二醇（PEG）进行表面钝化，来提高所制备样品的光致发光（PL）强度。通过 X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）、PL 和紫外-可见光谱对制备的量子点进行了表征。与其他样品相比，在 180°C 下合成并被 Se（0.3%）修饰的 GQDs 具有最大的 PL 强度，并且余辉持续时间超过 90 分钟。在 360nm 的激发波长下，在 600-900nm 处产生最大发射，并产生高单线态氧（O ）生成，使其成为光动力治疗应用的良好候选者。
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