Abstract
In this study, new carbon nanomaterial N-doped carbon dots (NCDs) were obtained via a one-step hydrothermal method using isoleucine and citric acid as carbon precursors. TEM results showed that the NCD diameters were not uniform but distributed in the 6–15nm range, with an average value of 10nm. The maximum emission wavelength of the obtained NCDs was 415nm with an excitation wavelength of 370nm. Under optimal conditions, the nanoparticle can be used as sensors and exhibited a ‘turn-off’ fluorescence response to Fe3+, with a good linear relationship of (F/F0) versus Fe3+ over the concentration range of 0–20μmol/L.
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