Dye Plants Derived Carbon Dots for Flexible Secure Printing

被引:14
作者
Li, Linlin [1 ]
Han, Yuanyuan [1 ]
Wang, Lihua [2 ]
Jiang, Wei [1 ]
Zhao, Haiguang [2 ]
机构
[1] Qingdao Univ, Coll Text & Clothing, 308 Ningxia Rd, Qingdao 266071, Peoples R China
[2] Qingdao Univ, Coll Phys, State Key Lab Biofibers & Ecotext, 308 Ningxia Rd, Qingdao 266071, Peoples R China
基金
中国国家自然科学基金;
关键词
dye plants; carbon dots; efficient; environmental friendliness; flexible secure printing; GRAPHENE QUANTUM DOTS; GREEN SYNTHESIS; NATURAL DYES; INK; COLOR; BLUE;
D O I
10.3390/nano12183168
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Carbon dots (C-dots) are fluorescent nanomaterials, exhibiting excellent structure-dependent optical properties for various types of optical and electrical applications. Although many precursors were used for C-dots production, it is still a challenge to produce high-quality C-dots using environmentally-friendly natural precursors. In this work, multiple-colored colloidal C-dots were synthesized via a heating reaction using natural plant dyes as precursors, for example, Indigo, Carcuma longa, and Sophora japonica L. The as-prepared C-dots have absorption in the UV range of 220 to 450 nm with the typical emission ranging from 350 to 600 nm. The as-obtained C-dots have a quantum yield as high as 3.8% in an aqueous solution. As a proof-of-concept, we used the as-prepared C-dots as fluorescence inks for textile secure printing. The printed patterns are almost invisible under daylight and have distinct and clear patterns under 365 and 395 nm light, proving the great potential in optical anti-counterfeiting. This work demonstrates the advanced strategy for high-performance C-dots production from natural dyes and their potential application in flexible secure printing systems.
引用
收藏
页数:10
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