Water Soluble Fluorescent Carbon Nanodots from Biosource for Cells Imaging

Abstract

Carbon nanodots (CNDs) derived from a green precursor, kidney beans, was synthesized with high yield via a facile pyrolysis technique. The CND material was easily modified through simple oxidative treatment with nitric acid, leading to a high density “self-passivated” water soluble form (wsCNDs). The synthesized wsCNDs have been extensively characterized by using various microscopic and spectroscopic techniques and were crystalline in nature. The highly carboxylated wsCNDs possessed tunable-photoluminescence emission behavior throughout the visible region of the spectrum, demonstrating their application for multicolor cellular imaging of HeLa cells. The tunable-photoluminescence properties of “self-passivated” wsCNDs make them a promising candidate as a probe in biological cell-imaging applications.

Highly sensitive fluorometric method based on nitrogen-doped carbon dot clusters for tartrazine determination in cookies samples

“…The TEM image of the CDs in the microscale showed clusters in different shapes, just like carbon black(Figure 2a). A few CDs with similar aggregation have been reported in the literature[23][24][25][26]. When the image of a cluster was magnified, it was seen that CDs with different diameters had almost spherical structures(Figure 2b).…”

Biomass-derived Carbon Quantum Dots for Visible-Light-Induced Photocatalysis and Label-Free Detection of Fe(III) and Ascorbic acid

“…The CQDs have negatively charged oxygenated carboxyl and hydroxyl functional groups as evidenced by the FTIR and XPS analyses, leading to discrete energy levels as emission centers. These emission centers are known to be responsible for the characteristic PL properties of CQDs via nonradiative recombination of charge carriers 18,48 . The tunable emissions of CQDs are thought to be due to the optical selection of distinct emissive traps on the surface 16 .…”

Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice

“…e UV-Vis absorption spectrum has no background absorption in the visible area. is result demonstrated that there are no other forms of nanocarbon produced during the partial carbonization of precursors which are usually absorbed at longer wavelengths [18]. e photoluminescence excitation (PLE) spectrum of the C-dots is measured by monitoring the emission at 510 nm as shown in Figure 6(a).…”