Fluorescent magnetic gadolinium-doped carbon dots(Gd-CDs)were prepared using a high-temperature carbonization method.The prepared Gd-CDs emitted bright green fluorescence with a fluorescence quantum yield of 32.6%and a T1 relaxation efficiency of up to 9.02 L·mmol-1·s-1.By conjugating with the ovarian cancer-specific antibody Anti-HE4,the resulting Anti-HE4/Gd-CDs nanoprobes could perform specific fluorescent imaging and T1-weighted imaging of SKOV-3 ovarian cancer cells.The fluorescence intensity was proportional to the concentration of SKOV-3 cells,with a detection limit of 658 cell·mL-1.This method was applied to the detection of SKOV-3 cells in blood samples.
关键词
钆掺杂碳点/靶向探针/荧光成像/磁共振成像/卵巢癌细胞
Key words
gadolinium-doped carbon dots/targeting probe/fluorescence imaging/magnetic resonance imaging/ovarian cancer cell