Abstract
Nanoscale technique has been regarded as the manipulation of organic and inorganic entities at the atomic level and unique features are acquired. Such surface-passivated nanodomains are exploring diverse roles by expanding the range of their prospects. The well-defined fluorescent framework based on carbon quantum dots has been described, which can be utilized to detect Fe3+ and ascorbic acid (AA). The growth of carbon dots has been realized in the presence of 3-Aminophenylboronic acid and citric acid and the synthesis route is based on hydrothermal condition. Under the excitation at 365 nm, the nanoparticles give rise to intensive blue emission at 450 nm. The addition of Fe3+ induces the signal suppression. Meanwhile, the presence of ascorbic acid can substantially recover the emission, which will be caused by the reduction of trivalent iron ions by ascorbic acid. The titration profile for both Fe3+ and ascorbic acid in the broad range of 5-450 μM and 10-350 μM are in the forms of linear equations. The relative low detection limits (394 nM and 448 nM) are determined for Fe3+ and AA respectively. The development of multiple targets sensing on the basis of carbon dots achieves a deeper understanding of fundamental properties in nanomaterials.
Published Version
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