Water‐Soluble Fluorescent Carbon Quantum Dots and Photocatalyst Design

Abstract

Größenkontrolliert: Eine einstufige Alkalimetall‐unterstützte elektrochemische Methode zur Herstellung von Kohlenstoff‐Quantenpunkten (CQDs) mit größenabhängiger Lumineszenz wird vorgestellt (siehe Bild). Die Upconversion‐Lumineszenz der CQDs könnte als Grundlage für die Entwicklung neuer Photokatalysatoren dienen.

Synthesis of fluorescent carbon dots via microwave carbonization of citric acid in presence of tetraoctylammonium ion, and their application to cellular bioimaging

“…Due to the strongly fluorescent, color-tunable [5], readily water soluble, and nontoxic properties, immense applications from this material has boosted. Such as the fields in catalysis [6,7], bio sensing [8], theranostics [9], and bio imaging [10][11][12][13][14].…”

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

“…CDs have a potential as replacements for toxic metal-based quantum dots (QDs) and are proved to be promising candidates in many applications such as medical diagnosis [5], bio-images [4,[6][7][8][9][10], detection of metal ions [11][12][13][14][15] and catalysis [16,17]. 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.…”

Fluorescent carbon dots for sensitive determination and intracellular imaging of zinc(II) ion

“…S2a). The peak at about 3346 cm −1 corresponds to the O-H stretching mode [17,26]. The peak at about 1700 cm −1 indicates the presence of carbonyl (C=O) groups.…”

“…The efficiency of FRET strongly depends on the degree of spectral overlap between the emission spectrum of the donor and the absorption spectrum of the acceptor, the distance between the donor and the acceptor, and their orientation [12][13][14]. Carbon dots (CDs), with sizes below 10 nm, possess strong and tuneable photoluminescence (PL) and biocompatible properties, which are popular candidates for the biological imaging and sensitive ion detection [15][16][17][18]. In particular, the surface of CDs can be functionalized to demonstrate a strong bonding with specific detected acceptors, which allows for a short distance between CDs and acceptors [19].…”