Department of Chemistry, Kalyani University, Kalyani, Nadia 741235, India.
Department of Chemistry, The University of Burdwan, Burdwan 713104, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Jun 15;234:118256. doi: 10.1016/j.saa.2020.118256. Epub 2020 Mar 16.
Polyvinyl-pyrrolidone capped spherical cadmium sulphide quantum dots (CdS-PVP QDs), 2-6 nm in size, were developed as a selective turn-on fluorescence nanosensor for monohydrogen phosphate ion (HPO) in aqueous medium. Fluorescence intensity of CdS-PVP QDs significantly increased with addition of HPO ions, whereas the other common inorganic ions had very little effect on the fluorescence intensity. The proposed sensor may be efficiently used for the detection of HPO ions at a low level of concentration up to 213 nM in real urine sample. Cell imaging study indicates that the CdS-PVP QDs are cell permeable and can detect the intracellular distribution of HPO ions under fluorescence microscope. The CdS-PVP QDs showed considerable activity against Staphylococcus aureus also.
聚维酮 capped 球形硫化镉量子点（CdS-PVP QDs），粒径为 2-6nm，被开发为一种在水相介质中对单氢磷酸盐离子（HPO）具有选择性的开启荧光纳米传感器。随着 HPO 离子的加入，CdS-PVP QDs 的荧光强度显著增强，而其他常见的无机离子对荧光强度几乎没有影响。该传感器可用于在实际尿样中低浓度（高达 213nM）下检测 HPO 离子。细胞成像研究表明，CdS-PVP QDs 具有细胞通透性，可在荧光显微镜下检测 HPO 离子的细胞内分布。CdS-PVP QDs 对金黄色葡萄球菌也表现出相当大的活性。
