Ratiometric fluorescent nanosensor based on water soluble carbon nanodots with multiple sensing capacities

	Ratiometric fluorescent nanosensor based on water soluble carbon nanodots with multiple sensing capacities
	Qu S.; Chen H.; Zheng X.; Cao J.; Liu X.
	2013
发表期刊	Nanoscale
ISSN	ISBN/20403364
卷号	5 期号:12
摘要	A construction strategy for ratiometric fluorescent nanosensors based on water soluble C-dots was developed, which could sense temperature (10-82 C), pH values (lower than 6.0 or higher than 8.6) and Fe3+ ions (0.04 M) by monitoring the intensity ratios of dual fluorescence bands (Ib/Ig) under 380 nm excitation. Ib/I g decreased nearly linearly with increasing temperature from 10 to 82 C. In the pH range from 8.6 to 6.0, the Ib/Ig was nearly constant at 0.75. Ib/Ig gradually decreased from 0.75 to 0.52 in the pH range from 6.0 to 1.9, and increased nearly linearly from 0.52 to 0.75 in the pH range from 1.9 to 1.0. The dual fluorescence behavior was reversible in the pH range from 1.0 to 8.6. As pH increased from 10.6 to 13.0, the green fluorescence band decreased continuously and blue shifted with a nearly linear increase in Ib/Ig from 0.75 to 2.15, while the green fluorescence band cannot be recovered by decreasing the pH value. Ib/Ig was ultrasensitive and selective in presence of Fe3+ (0.04 M) in neutral aqueous environments. The two fluorescence bands of the C-dots were attributed to different surface states that may produce different fluorescent signal responses to external physical or chemical stimuli. 2013 The Royal Society of Chemistry.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/40827
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Qu S.,Chen H.,Zheng X.,et al. Ratiometric fluorescent nanosensor based on water soluble carbon nanodots with multiple sensing capacities[J]. Nanoscale,2013,5(12).
APA	Qu S.,Chen H.,Zheng X.,Cao J.,&Liu X..(2013).Ratiometric fluorescent nanosensor based on water soluble carbon nanodots with multiple sensing capacities.Nanoscale,5(12).
MLA	Qu S.,et al."Ratiometric fluorescent nanosensor based on water soluble carbon nanodots with multiple sensing capacities".Nanoscale 5.12(2013).

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