Fe3+ detection, bioimaging, and patterning based on bright blue-fluorescent N-doped carbon dots

The Analyst ◽  
2020 ◽  
Vol 145 (16) ◽  
pp. 5450-5457 ◽  
Author(s):  
Lin Li ◽  
Lihong Shi ◽  
Jing Jia ◽  
Dan Chang ◽  
Chuan Dong ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Carbon Dots ◽  
Cellular Imaging ◽  
One Step ◽  
Doped Carbon Dots ◽  
Bright Blue

The bright blue fluorescent N-doped carbon dots (N-CDs) was successfully fabricated by one-step hydrothermal treatment of astragalus and was exploited for cellular imaging and patterning.

Simple and Green Synthesis of Boron-, Sulfur-, and Nitrogen-Co-Doped Carbon Dots as Fluorescent Probe for Selective and Sensitive Detection of Sunset Yellow

NANO ◽  
2017 ◽  
Vol 12 (10) ◽  
pp. 1750123 ◽  
Author(s):  
Ying Huang ◽  
Zhengjun Cheng
Keyword(s):  
Carbon Dots ◽  
Sensitive Detection ◽  
Sunset Yellow ◽  
Transmission Electron ◽  
One Step ◽  
Water Dispersibility ◽  
Doped Carbon Dots ◽  
Electron Microscope Image ◽  
Bright Blue ◽  
Co Doped

Herein, we have reported the synthesis of boron-, sulfur-, and nitrogen-co-doped carbon dots (B/S/N-CDs) by one-step hydrothermal method using D-([Formula: see text])-maltose monohydrate, boracic acid, and thiocarbamide as the precursors. The prepared B/S/N-CDs possess good water dispersibility, excellent pH stabilities, and resistance to photobleaching. Furthermore, the transmission electron microscope image indicates that the B/S/N-CDs are homogeneously spherical and show good dispersion. Noticeably, the B/S/N-CDs show bright blue photoluminescence with a quantum yield of 8.9% in aqueous solution and can be used as a potent photoluminescent probe for selective and sensitive detection of sunset yellow (SY). Compared with other food colors, SY can dramatically quench the fluorescence of B/S/N-CDs. Meanwhile, the fluorescence intensity displays a good linear response with SY concentration in the range of 0–70[Formula: see text][Formula: see text]M ([Formula: see text]) and the detection limit is as low as 4.65[Formula: see text]nM. The B/S/N-CDs can also be applied for the detection of SY in mineral water and business drink with satisfactory recovery. Our study has demonstrated that the B/S/N-CDs may have wide application values in medical detection, environmental monitoring, and related researches.

A hydrothermal route for synthesizing highly luminescent sulfur- and nitrogen-co-doped carbon dots as nanosensors for Hg2+

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86436-86442 ◽  
Author(s):  
Chunfeng Wang ◽  
Dong Sun ◽  
Yujuan Chen ◽  
Kelei Zhuo
Keyword(s):  
Graphene Oxide ◽  
Fluorescent Probe ◽  
Hydrothermal Treatment ◽  
Carbon Dots ◽  
Hydrothermal Route ◽  
One Step ◽  
The One ◽  
Doped Carbon Dots ◽  
Co Doped

Sulfur- and nitrogen-co-doped carbon dots were synthesized by the one step hydrothermal treatment of pyritinol hydrochloride in the presence of graphene oxide, and could be used as an effective fluorescent probe for the detection of Hg2+.

scholarly journals Green Synthesis of Multifunctional Carbon Dots with Antibacterial Activities

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 369 ◽  
Author(s):  
Arumugam Saravanan ◽  
Moorthy Maruthapandi ◽  
Poushali Das ◽  
John H. T. Luong ◽  
Aharon Gedanken
Keyword(s):  
Carbon Dots ◽  
Fluorescence Spectra ◽  
Antibacterial Effect ◽  
Curcuma Longa ◽  
Antibacterial Activities ◽  
Blue Color ◽  
Mean Size ◽  
One Step ◽  
Bactericidal Activities ◽  
Bright Blue

Carbon dots (CDs) were obtained from medicinal turmeric leaves (Curcuma longa) by a facile one-step hydrothermal method and evaluated for their bactericidal activities against two gram-negative; Escherichia coli, Klebsiella pneumoniae, and two gram-positive counterparts; Staphylococcus aureus, S. epidermidis. The CDs exhibited spherical shapes with a mean size of 2.6 nm. The fluorescence spectra of CDs revealed intense fluorescence at λex/em = 362/429 nm with a bright blue color in an aqueous solution. The CDs showed strong photostability under various environmental conditions (pH, salt, and UV-radiation). The complete bactericidal potency of CDs was 0.25 mg/mL for E.coli and S. aureus after 8 h of exposure, while for K. pneumoniae, and S. epidermidis, the CDs at 0.5 mg/mL good antibacterial effect within 8 h and complete eradication after 24 h of exposure is observed. The release of reactive oxygen species played a crucial role in the death of the bacterial cell. The present study provides a strategy for the preparation of CDs from a medicinal plant and their potential antibacterial activities against four common contagious pathogens.

Fast one-step synthesis of N-doped carbon dots by pyrolyzing ethanolamine

2014 ◽  
Vol 2 (36) ◽  
pp. 7477-7481 ◽  
Author(s):  
Xinwei Dong ◽  
Yanjie Su ◽  
Huijuan Geng ◽  
Zhongli Li ◽  
Chao Yang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Carbon Dots ◽  
High Yield ◽  
One Step ◽  
Doped Carbon Dots

N-doped CDs can be obtained directly with high yield by pyrolyzing ethanolamine in air within just 7 minutes with the assistance of hydrogen peroxide.

One step synthesis of N-doped carbon dots/hydroxyapatite:Eu,Gd composite with dual-emissive and solid-state photoluminescence

2020 ◽  
Vol 508 ◽  
pp. 144862 ◽  
Author(s):  
Qing Chang ◽  
Wei Xu ◽  
Qianqian Chen ◽  
Chaorui Xue ◽  
Ning Li ◽  
...  
Keyword(s):  
Solid State ◽  
Carbon Dots ◽  
One Step ◽  
Doped Carbon Dots

Single-step synthesis of N-doped carbon dots and applied for dopamine sensing, in vitro multicolor cellular imaging as well as fluorescent ink

2021 ◽  
Vol 406 ◽  
pp. 113019
Author(s):  
Amit Kumar ◽  
Shwetank Asu ◽  
Poulami Mukherjee ◽  
Prabhakar Singh ◽  
Archana Kumari ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Cellular Imaging ◽  
Single Step ◽  
Doped Carbon Dots
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