An Electrochemical Avenue to Blue Luminescent Nanocrystals from Multiwalled Carbon Nanotubes (MWCNTs)

Abstract

Blue luminescent nanocrystals (NCs) were prepared electrochemically from multiwalled carbon nanotubes (MWCNTs) for the first time. The carbon NCs were characterized by UV−vis, photoluminescence, Raman, XRD spectroscopy, and high-resolution transmission electron microscopy. The structure evolution of the MWCNTs during electrochemical treatments was monitored by SEM ex situ. Since the MWCNTs were formed with scrolled graphene layers, we propose that tetrabutyl ammonium (TBA) cations most probably intercalate into the gaps and the defects during electrochemical cycling and break the tubes near the defects.

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].…”

Preparation of carbon dot‐based ratiometric fluorescent probes for cellular imaging from Curcuma longa

“…Moreover, the number of sp 2 and delocalized electrons in the FNP surface confers the optoelectronics properties. [19][20][21][22] The fluorescent quantum yield (%) is estimated to be about 0.131% for blue and 0.228% for green FNPs as well as 0.398% for blue and 0.252% for green P-FNPs. Interestingly, the P-FNPs showed similar fluorescence profiles to the C-FNPs, but generated higher fluorescent intensities, consistent with the increased quantum yield.…”

Improved Fluorescence of Carbon Dots Prepared from Bagasse under Alkaline Hydrothermal Conditions

“…Furthermore, the C1s and the O1s fitting analysis for the S-A and S-B in Fig. 4 illustrate that the peak at 288 eV of carbon attributed to carboxyl groups on the surface of the S-B was significantly enhanced from 10.47% to 39.75%, while the peaks at 286 eV of C-O were significantly weakened from 45.74% to 17.03% after the hydrothermal reaction of the S-A (Zhou et al 2007).…”

“…Many researchers have developed a variety of synthetic methods to prepare environmentfriendly CDs, including laser irradiation of graphite (Sun et al 2006;Hu et al 2009), electrochemical oxidation of graphite (Zhao et al 2008;Zheng et al 2009), multi-walled carbon nanotubes (Zhou et al 2007), neutron beam radiation of nano-diamond (Yu et al 2005;Fu et al 2007), chemical oxidation (Liu et al 2007;Tian et al 2009;Peng and Travas-Sejdic 2009;Liu et al 2009;Ray et al 2009;Zhang et al 2010;Pan et al 2010;), hydrothermal oxidation (Bourlinos et al 2008) of the appropriate precursors, and microwave decomposition of carbohydrates (Zhu et al 2009). …”