| 초록 |
Carbon quantum dots (CDs) are promising nanomaterials in biomedical applications. Herein, a simple, green, and low-cost way was developed in the synthesis of fluorescent water soluble CDs, using one step hydrothermal process of broccoli. The as-prepared CDs have average sizes about 3 nm and emit blue photoluminescence (PL) in the range 380-650 nm, depending on the excitation wavelength. The functional group compositions and morphological structures of the CDs were investigated via several analytical tool such as Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), UV-Visible spectroscopy, Transmission electron microscope (TEM), and Photoluminescence spectrometer (PL). Based on these analyses, a linear relationship was obtained between the relative fluorescence intensity and concentration of Hg2+. Mercury quenched the PL intensity of the CDs more than other heavy metals, which indicates that CDs can be used effectively as an Hg2+ sensing media. |
