Cultivating Fluorescent Flowers with Highly Luminescent Carbon Dots Fabricated by a Double Passivation Method

Nanomaterials

Tao Chang¹  Baoshuang Wu¹  Shan Liu¹  Huanhuan Du¹  Shuai Han¹  Shenjun Qin²  Haiping Zhao² 

[1] College of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China;Key Laboratory of Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan 056038, China;

关键词: carbon dots;    surface passivation;    luminescence;    Ca(OH)2;    flowers;   

DOI  :  10.3390/nano7070176

来源: DOAJ

【 摘 要 】

In this work, we present the fabrication of highly luminescent carbon dots (CDs) by a double passivation method with the assistance of Ca(OH)2. In the reaction process, Ca2+ protects the active functional groups from overconsumption during dehydration and carbonization, and the electron-withdrawing groups on the CD surface are converted to electron-donating groups by the hydroxyl ions. As a result, the fluorescence quantum yield of the CDs was found to increase with increasing Ca(OH)2 content in the reaction process. A blue-shift optical spectrum of the CDs was also found with increasing Ca(OH)2 content, which could be attributed to the increasing of the energy gaps for the CDs. The highly photoluminescent CDs obtained (quantum yield: 86%) were used to cultivate fluorescent carnations by a water culture method, while the results of fluorescence microscopy analysis indicated that the CDs had entered the plant tissue structure.

【 授权许可】

Unknown