Surfactant-Free Synthesis and Functionalization of Highly Fluorescent Gold Quantum Dots
The Journal of Physical Chemistry C2008Vol. 112(29), pp. 10778–10783
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Xiaofeng Liu, Chun‐Zhu Li, Jialiang Xu, Jing Lv, Mei Zhu, Yanbing Guo, Shuang Cui, Huibiao Liu, Shu Wang, Yuliang Li
Abstract
A novel route has been developed for surfactant-free synthesis of highly fluorescent gold quantum dots (GQDs) in N,N-dimethylformamide (DMF). The as-prepared GQDs show instinctive fluorescence and good solubility in water. The formation mechanism and functionalization of GQDs were investigated by UV−vis spectra, fluorescence excitation and emission spectra, mass spectra, and TEM observation. Ligand-dependent optical properties of functionalized GQDs were found to be dramatically different. The approach provides a facile method of functionalization of bare GQDs for further applications, such as fluorescent biolabels, energy transfer units, and light-emitting devices.
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