Rapid and Large‐Scale Production of Multi‐Fluorescence Carbon Dots by a Magnetic Hyperthermia Method

Abstract

The intrinsic lowy ield of carbon dots (CDs) is ab arrier that limits practical application. Now,amagnetic hyperthermia (MHT) method is used to synthesize fluorescent CDs on alarge scale (up to 85 g) in one hour (yield ca. 60 %). The reaction process is intensified by MHT since the efficient heating system enhances the energy transfer.C Ds with blue, green, and yellow luminescence are synthesized by using carbamide and citrate with three different cations (Zn 2+ ,N a + , K + ), respectively.T he CDs exhibit bright fluorescence under UV light and showe xcellent monodispersity and solubility in water.The alternation of photoluminescence (PL) emissions of these CDs is probably due to the difference in particle sizes and surface state.Abar coating technique is used to construct largearea emissive polymer/CDs films.C Ds can insert themselves into the polymer chains by hydrogen bonding and electrostatic interactions.W ound healing efficiency can be enhanced by the Zn-CDs/PCL nanofibrous scaffold. Figure 4. a) High-resolution XPS of C1s, N1s, and Zn 2p spectra of the Zn-CDs. b) High-resolution XPS of C1s, N1s, and Na 1s spectra of the Na-CDs. c) High-resolution XPS of C1s, N1s, and K2pspectra of the K-CDs. Angewandte Chemie Communications 3103

Fluorescent Carbon Dots: Fantastic Electroluminescent Materials for Light‐Emitting Diodes

“…How to acquire high‐quality CDs with both large‐scale synthesis and easy purification is of significant importance and deserves more attention. Delightedly, some groups have developed novel methods for preparing scale‐up CDs through unique reaction systems [ 135 ] or techniques, [ 136 ] which can be referred in future commercialization. Third, the detail photoelectric conversion mechanism in CD‐based LED devices and the exact structures and luminescent mechanisms of CDs are still unclear, which make it difficult to optimize the device architectures and obtain high‐quality electroluminescent LEDs.…”

Cytocompatible Amphipathic Carbon Quantum Dots as Potent Membrane-Active Antibacterial Agents with Low Drug Resistance and Effective Inhibition of Biofilm Formation

“…The deconvolution of the C 1s binding peak presents three major binding peaks (Figure S2A). The peak of the C 1s binding energy is the strongest at 284.1 eV (47.63%), which is the graphite sp 2 hybrid carbon in the Lys/Trp-CQDs structure . The peak at 284.8 eV shows the presence of C–C and C–N .…”

“…The peak of the C 1s binding energy is the strongest at 284.1 eV (47.63%), which is the graphite sp 2 hybrid carbon in the Lys/Trp-CQDs structure. 34 The peak at 284.8 eV shows the presence of C−C and C−N. 35 Moreover, the peaks at 286.0 and 287.3 eV could be allotted to C−O and C�O groups, respectively.…”

One-Step Facile Synthesis of Fluorescent Carbon Dots via Magnetic Hyperthermia Method

“…Due to its intrinsic enhanced heat-transfer efficiency, magnetic hyperthermia has been widely applied in material synthesis. In this respect, the cooling effect (magnetic refrigeration) has long been used to obtain extremely low temperatures of millikelvin, while the heating effect (induction heating or hysteresis heating) has been applied for magnetic hyperthermia, syntheses of graphene oxide and CDs, and other industrial purposes. − …”