荧光
材料科学
吸收(声学)
碳纤维
色散(光学)
热液循环
光化学
纳米技术
分析化学(期刊)
化学工程
光学
化学
色谱法
复合数
物理
工程类
复合材料
作者
Qian He,Junkai Ren,Yaodong Liu
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2022-02-03
卷期号:33 (17): 175705-175705
被引量:5
标识
DOI:10.1088/1361-6528/ac4b7a
摘要
In this study, carbon dots (CDs) synthesized by hydrothermal method with amino-rich surface exhibit tunable fluorescence across entire visible range by simply controlling the concentration. A comprehensive comparison has been performed for the first time between concentration-induced aggregation of the single-type CDs and electrostatic-induced agglomeration of opposite-charged CDs in terms of their fluorescence properties. Experimental results show that both the aggregation of CDs and internal absorption filtration are possible causes of the concentration-dependent fluorescence emission. Subsequently, the inter distance of adjacent CDs in their aggregates was enlarged by forming rigid double-stranded DNA (dsDNA) between adjacent CDs through base pairing. It is clear that the contact of CDs induces the changes of fluorescence emission and light absorption. Through a better understanding of the mechanisms behind concentration-induced multicolor emission, this work can provide a novel strategy to develop the advanced applications of CDs.
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