Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles

	Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles
	Guo Z.; Zhang Z.; Zhang W.; Zhou L.; Li H.; Wang H.; Andreazza-Vignolle C.; Andreazza P.; Zhao D.; Wu Y.; Wang Q.; Zhang T.; Jiang K.
	2014
发表期刊	ACS Applied Materials and Interfaces
ISSN	ISBN/19448244
卷号	6 期号:23 页码:20700-20708
摘要	This paper reports the preparation and properties of color-switchable fluorescent carbon nanodots (C-dots). C-dots that emit dark turquoise and green-yellow fluorescence under 365 nm UV illumination were obtained from the hydrothermal decomposition of citric acid. Dark green fluorescent C-dots were obtained by conjugating prepared C-dots to form C-dot@C-dot nanoparticles. After successful conjugation of the C-dots, the fluorescence emission undergoes a blue-shift of nearly 20 nm (0.15 eV) under UV excitation at 370 nm. The C-dots emit goldenrod, green-yellow, and gold light under excitation at 455 nm, which shows that the prepared C-dots are color-switchable. Furthermore, conjugation of the C-dots results in enhanced, red-shifted absorption of the - transition of the aromatic sp2 domains due to the conjugated -electron system. N incorporation in the carbon structure leads to a degree of dipoles for all the aromatic sp2 bonds. The enhanced absorption in a wide range from 226 to 601 nm indicates extended conjugation in the C-dot@C-dot structure. The time-resolved average lifetimes for the three different types of C-dots prepared in this study are 7.10, 7.65, and 4.07 ns. The radiative rate (reduced decay lifetime) increases when the C-dots are conjugated in the C-dot@C-dot nanoparticles, leading to the enhanced fluorescence emission. The fluorescence emission of the C-dot@C-dot nanoparticles can be used in applications such as flow cytometry and cell imaging.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43792
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Guo Z.,Zhang Z.,Zhang W.,et al. Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles[J]. ACS Applied Materials and Interfaces,2014,6(23):20700-20708.
APA	Guo Z..,Zhang Z..,Zhang W..,Zhou L..,Li H..,...&Jiang K..(2014).Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles.ACS Applied Materials and Interfaces,6(23),20700-20708.
MLA	Guo Z.,et al."Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles".ACS Applied Materials and Interfaces 6.23(2014):20700-20708.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
am5071078.pdf（5266KB）			开放获取	CC BY-ND	浏览下载