Synthesis and Applications of Red‐Emissive Carbon Dots

Abstract

Carbon dots (CDs), a new class of fluorescent carbon nanoparticles (less than 10 nm in size), have been widely applied in various fields, including sensors, bioimaging, catalysis, lightemitting devices (LEDs), and photoelectronic devices, owing to their unique properties such as low toxicity, bio-compatibility, high photostability, easy surface modification, and up-conversion fluorescence, over the past decades. Recently, multiple-color-emissive CDs, especially redemissive CDs (RCDs), have drawn much attention owing to their unique advantages, like the ability to penetrate the animal bodies without the disturbance of strong tissue autofluorescence, multiple-color fluorescence displaying or sensing, and the capacity to be one essential component to obtain white LED (WLED). In this review, we focused on the progress of recently-emerging RCDs in the past five years, including their synthetic methods (hydrothermal, solvothermal, reflux condensation and microwave techniques), influencing factors (precursors, solvents, elements doping, surface chemistry) and various applications (bioimaging, sensor, photocatalysis and WLEDs), with a perspective on the future advancements.

Influence of Luminescent Nanomaterials on Plant Growth and Development

“…CDs have the advantages of high‐water solubility, strong chemical inertia, easy functionalization, low toxicity, good biocompatibility, etc [43] . Therefore, they are widely used in photocatalysis, bioelectricity enhancement, [44] biological imaging, and other fields [45] . Hence, it is of great significance to investigate the potential impact of CDs on the growth of various plants.…”

pH and redox dual-sensitive drug delivery system constructed based on fluorescent carbon dots

“…Fluorescent carbon dots (CDs), as a novel type of uorescent nanomaterials, have many advantages such as adjustable emission, good photostability, small size, and good biocompatibility. [17][18][19][20] Therefore, CDs exhibited broad biological applications and have been regarded as a preferred carrier for drug delivery systems. [21][22][23][24] In addition, polymer conjugates can be used to structure the coating layer of the drug delivery system, which can preferentially enter the cancer tissue via the enhanced permeability and retention (EPR) effect.…”

Eco‐friendly PCL@CDs biomaterials via phytic acid, CDs‐cocatalyzed polymerization for rifapentin delivery

“…And CDs modified with tea phenol and boric acid have been prepared for controlling DOX release 30 . Besides, the surface of CDs has enough electron cloud to improve the catalytic activity and electron transition, which can bring the potential application 21,31 . Therefore, CDs have shown a good promise in initiating and catalyzing polymerization for drug delivery.…”