Multicolor fluorescence regulation of N doped silicon quantum dots and the multiple applications

Selective detection of mercury ions via single and dual signals by silicon-doped carbon quantum dots

“…4(D)) are attributed to the Si–C and Si–O bonds of Si-CQDs. 21 The results of XPS spectrum analysis are consistent with those of FT-IR.…”

“…The high-resolution spectrum of C1s (Fig. 4(B)) can be fitted into five fitted peaks exhibited at 284.05 eV, 284.79 eV, 285.90 eV, 286.46 eV and 287.91 eV, attributed to the C-Si, C-C, C-N, C-O and CQO bonds, 21 respectively. The high-resolution spectrum of O1s (Fig.…”

Detection of Amaranth and Iron in Foods by Modified Carbon Quantum Dots as a Ratiometric Fluorescence Probe

“…The main binding energies of each of these four elements are ~284.74 eV (C1s), ~399.52 eV (N1s), ~531.53 eV (O1s) and ~101.98 eV (Si2p). The N1s (399.52 eV) spectrum (Figure 3b) a peak at 399.74 eV is obtained after fitting, which was ascribed to NÀ H. [35] Figure 3c shows the high-resolution C1s XPS spectrum, which could be deconvoluted into three peaks, corresponding to a carbon-oxygen double bond at 287.89 eV, a carbon-nitrogen single bond or carbon-oxygen single bond at 285.83 eV, and a carbon-carbon double bond at 284.81 eV, respectively. [36] The high resolution spectrum (Figure 3d) of O1s is divided into two peaks, one positioned at 531.68eV is ascribed to C=O bonding of carbonyl group, while the other at 533.34eV attributed to CÀ O bonding.…”

Green synthesis of yellow-green emissive silicon nanoparticles and their application for the sensitive fluorescence detection of bilirubin

“…Water-soluble SiNPs, a member of the family of photoluminescent nanomaterials, possess the advantages of simple preparation procedures, stable optical properties, nontoxicity, good biocompatibility and easy surface modification. Thus, various strategies including the post-modification method, 18 microwave-assisted method, 19 hydrothermal method, 20,21 room temperature stirring method 22,23 and water bath method 24 have been reported to synthesize water-soluble SiNPs in recent years. Among them, the water bath method exhibited the advantages of convenient operation, mild preparation conditions and no need for high temperature and pressure.…”