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The present study focus on optical sensing of breast cancer antigen 15.3 (CA 15.3) using cadmium sulphide quantum dot (CdS-QD) in saline and serum samples spiked with antigen. The surface of CdS-QD was modified by cysteamine capping followed by tagging of CA 15.3 antibody. The samples were characterised using UV-visible absorption spectroscopy (UV-VIS Spectroscopy), Fourier transform infrared spectroscopy...
Cellular endocytotic quantum dots (QDs) have been successfully used as thermometers to sense temperature variations inside single living cells. Temperature changes have been detected remotely through optical readout. We showed the increased extracellular calcium concentration can trigger the thermogenesis of NIH/3T3 cells and therefore elevated the cellular temperature about 1.5 ??C. This technique...
We report the delivery of quantum dot (QD) fluorescence probes into mammalian cells by electroporation and endocytosis. The pH sensitivity of mercaptoacetic-acid-capped CdSe/ZnSe/ZnS quantum dots (MAA QDs) was investigated in both solution and living cells, demonstrating the potential of QDs as an intracellular pH sensor with long-term photostability and limited photobleaching. Further, QDs were utilized...
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