Provided is a preparation method of near-infrared silver sulfide quantum dots. The silver sulfide quantum dots have hydrophilic groups derived from a mercapto-containing hydrophilic reagent attached on the surface thereof, and the hydrophilic reagent is any one of mercaptoacetic acid, mercaptopropionic acid, cysteine, cysteamine, thioctic acid and ammonium mercaptoacetate or any combination thereof. The silver sulfide quantum dots have high fluorescence yield, good fluorescence stability, good biocompatibility and uniform sizes. The preparation method has moderate reaction conditions, simple operation, short production cycle, good reproducibility and is easy to control. The silver sulfide quantum dots can be used in the application of cellular imaging and biological tissue imaging.
本发明提供了一种近红外
硫化银量子点的制备方法。
硫化银量子点表面附有由含巯基亲
水试剂衍生的亲
水基团,亲
水试剂为
巯基乙酸、巯基
丙酸、半胱
氨酸、半
胱胺、
硫辛酸和
巯基乙酸铵中的任意一种或它们的任意组合。
硫化银量子点具有荧光产率高、荧光稳定性好、
生物相容性好、尺寸均匀等特点。该制备方法反应条件适中,操作简单,生产周期短,重现性好,易于控制。
硫化银量子点可用于细胞成像和
生物组织成像。