Preparation of highly photoluminescent sulfur-doped carbon dots for Fe(iii) detection

Abstract

Carbon dots (C-dots) with sulfur-doped (S-doped) was synthesized using a simple and straightforward hydrothermal method. The as-prepared S-doped C-dots exhibit significant high fluorescence quantum yield (67%) and unique emission property. The form spherical shaped S-doped C-dots have average diameter 4.6 nm and the fluorescence of S-doped C-dots can be effectively and selectively quenched by 10

Enhancing the luminescence of carbon dots by doping nitrogen element and its application in the detection of Fe(III)

“…Recently, a variety of methods, including laser ablation of graphite [18,19], electrochemical oxidation of graphite [20] and carbon nanotubes [21], thermal treatment of gelatin [22] or EDTA2Na [23], acid treatment of sucrose solution or glucose [24][25][26][27] and microwaving of Ionic liquids [28] or chitosan [29] etc., have been adopted in the preparation of C-dots. Although the unique property of CDs has been studied and synthesis of CDs with different strategies has been reported extensively [30][31][32][33][34][35], the luminescence mechanism of CDs remains unclear. This is, however, fundamental in solving the puzzle of CDs and success of transferring CDs into practice applications.…”

Calf thymus DNA characterization and its adsorption on different silica surfaces

“…Nano and micro particles have many functions such as antibacterial, 1 detection in chemical analysis, 2 tumor cell targeting, 3 polymer composites, 4,5 stable semiconductor material 6 and DNA delivery systems. 7 Recent studies have been focused on development of DNA related nanomaterials and nanotechnologies and the creation of nano-sized structures.…”

Fluorescent carbon quantum dot hydrogels for direct determination of silver ions

“…In fact, most analytical applications are focused on techniques related to metal ion sensing. The quenching of photoluminescence of a variety of carbon-based nanodots has been extensively studied as a means to detect metal ions such as Hg 2+ , Pb 2+ , Au 3+ Co 2+ ,Cu 2+ or Fe 3+ [8][9][10][11][12][13][14][15] as well as metallic and other carbonaceous nanoparticles [16][17][18][19].…”