Facile preparation of low cytotoxicity fluorescent carbon nanocrystals by electrooxidation of graphite

Abstract

A simple and facile method was developed to prepare fluorescent carbon nanocrystals (CNCs) with low cytotoxicity and no photobleaching, by electrooxidation of graphite in aqueous solution.

Study on fluorescence properties of carbogenic nanoparticles and their application for the determination of ferrous succinate

“…The particles were called ''carbogenic'' because they were not of pure carbon composition like carbon nanotubes or carbon nanodiamond but proved to be oxygen-containing carbon dots. Fluorescent carbogenic NPs can be obtained by various methods such as laser ablation of graphite [4,5] or carbon powders [6], proton-beam irradiation of nanodiamonds [7,8], carboxylation of carbon nanotubes [9][10][11], electrooxidation of graphite [12], hydrothermal decomposition of ammonium citrate salts [13,14] or separating from candle soot [15].…”

Production of yellow-emitting carbon quantum dots from fullerene carbon soot

“…These methodologies can be mainly classified into two categories, namely, the "top-down" and "bottom-up" methods. The former includes laser ablation [12][13][14], plasma treatment [15], electrochemical oxidation [16][17][18][19], and acid-refluxing [20][21][22][23][24][25][26][27][28][29][30][31], while the latter is mainly focused on pyrolysis using simple heating and hydrothermal or microwave treatment [32][33][34][35]. Among these methods, the acid-refluxing of raw carbon materials offers a large-scale production of CQDs as it only needs simple instruments and can be easily scaled-up using standard industrial equipment.…”

Hydrogen peroxide sensing based on carbon quantum dots

“…Compare to semiconductor quantum dots, luminescent CQDs were considered as a brand new class of luminescent due to their small size, high quantum yield, low cytotoxicity, possess fine biocompatibility, high photostability and environment friendliness, which make them suitable chemical and biological analyses. There are several methods to prepare CQDs have been reported [13][14][15][16][17]. However, these methods usually require not only complicated equipment and expensive materials but also complicated post treatment to enhance the quantum yield and water solubility of CQDs.…”