Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles
文献类型:期刊论文
作者 | Zhou L.; Zhang W.; Zhang W.; Wang H.; Wang H.; Zhang T.; Wang H.; Wang H. |
刊名 | ACS Applied Materials and Interfaces |
出版日期 | 2014 |
卷号 | 6期号:23页码:20700-20708 |
ISSN号 | ISBN/19448244 |
英文摘要 | 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 |
源URL | [http://ir.ciomp.ac.cn/handle/181722/43792] |
专题 | 长春光学精密机械与物理研究所_中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Zhou L.,Zhang W.,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 | Zhou L..,Zhang W..,Zhang W..,Wang H..,Wang H..,...&Wang H..(2014).Color-switchable, emission-enhanced fluorescence realized by engineering C-dot@C-dot nanoparticles.ACS Applied Materials and Interfaces,6(23),20700-20708. |
MLA | Zhou L.,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. |
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