Preparation of carbon nanodots capped by polyethylene glycol as a multifunctional sensor for temperature and paracetamol

NWIPB OpenIR

	Preparation of carbon nanodots capped by polyethylene glycol as a multifunctional sensor for temperature and paracetamol
	Qu, Fei ; Xue, Fangfang ; Liu, Jing ; You, Jinmao
	2017-08-21
发表期刊	ANALYTICAL METHODS
摘要	In this paper, a simple and green preparative strategy for synthesizing carbon nanodots (CNDs) is developed by a one-pot hydrothermalmethod, using ascorbic acid (AA) as the carbon source and polyethylene glycol (PEG) with a molecular weight of 1500 as the surface modification agent. Through changing the amount ratio of PEG-1500 to AA in the synthesis, we can obtain PEG-CNDs with different functions. For example, due to the thermosensitivity of PEG-1500, the as-prepared PEG1-CNDs exhibit unique temperature sensitivity when the mass ratio of PEG-1500 to AA is 24 : 1. A reversible change of PEG1-CNDs from the solid state to transparent solution with increasing temperature can be repeated several times. The optical transmittance signal of PEG1-CNDs linearly responds to temperature in the range of 20-65 degrees C. Besides, while the amount ratio of PEG-1500 to AA is 12 : 1, the obtained PEG2-CNDs lose thermal sensitivity and form a stable and fluorescent solution at room temperature. The emission of PEG2-CNDs can be quenched by Fe3+, while with the addition of paracetamol (PAR), the fluorescence is recovered because of forming chelates between Fe3+ and PAR. Under the optimized conditions, the linear range of PAR obtained is 0.03-30 mM with a detection limit of 13 nM. Finally, the proposed method is successfully applied to detect PAR in human serum and urine samples with satisfactory recoveries.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/43572
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Qu, Fei,Xue, Fangfang,Liu, Jing,et al. Preparation of carbon nanodots capped by polyethylene glycol as a multifunctional sensor for temperature and paracetamol[J]. ANALYTICAL METHODS,2017.
APA	Qu, Fei,Xue, Fangfang,Liu, Jing,&You, Jinmao.(2017).Preparation of carbon nanodots capped by polyethylene glycol as a multifunctional sensor for temperature and paracetamol.ANALYTICAL METHODS.
MLA	Qu, Fei,et al."Preparation of carbon nanodots capped by polyethylene glycol as a multifunctional sensor for temperature and paracetamol".ANALYTICAL METHODS (2017).