Carbon dots (CNDs) applicable to detection of dopamine and Al<3+>, cell imaging and logic gate operation

The invention discloses fluorescent CNDs prepared by using a simple one-step hydrothermal method and having quantum yield of 9.9%. The CNDs are applicable as an effective fluorescent probe for sensitive and selective detection of dopamine and Al ions, with detection limits being 0.78 [mu]M and 3.29 [mu]M, respectively; and the fluorescent probe presents good water solubility, high optical stability, low biotoxicity and other advantages. The fluorescent probe is applicable to logic gate experiments of various molecular levels and will present better adaptability in future logic gate experiments. In particular, the novel fluorescent probe is successively applied to detection of dopamine and Al ions in real samples. Experimental results in the invention prove that the novel CNDs have great potential in portable sensing devices. 本发明公开了种通过步简单的水热法制备出的荧光碳纳米点(CNDs)并且量子产率能达到9.9％。这种碳点能够作为种有效的荧光探针去灵敏地、选择性地检测多巴胺和Al离子，检测极限分别为0.78μM和3.29μM，并表现出了很好的水溶性，很高的光学稳定性以及较低的生物毒性等优点。该荧光探针能被应用于各种分子层次的逻辑门实验，而且它将在以后的逻辑门实验中展示出更好的