Jump to main content
Jump to site search

Issue 31, 2017
Previous Article Next Article

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

Author affiliations

Abstract

In this paper, a simple and green preparative strategy for synthesizing carbon nanodots (CNDs) is developed by a one-pot hydrothermal method, 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 °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 μM 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.

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

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 May 2017, accepted on 01 Jul 2017 and first published on 03 Jul 2017


Article type: Paper
DOI: 10.1039/C7AY01180F
Citation: Anal. Methods, 2017,9, 4533-4538
  •   Request permissions

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

    F. Qu, F. Xue, J. Liu and J. You, Anal. Methods, 2017, 9, 4533
    DOI: 10.1039/C7AY01180F

Search articles by author

Spotlight

Advertisements