scholarly journals Terbium Functionalized Schizochytrium-Derived Carbon Dots for Ratiometric Fluorescence Determination of the Anthrax Biomarker

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1234 ◽  
Author(s):  
Lina Zhang ◽  
Zhanwei Wang ◽  
Jingbo Zhang ◽  
Changliang Shi ◽  
Xiaoli Sun ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Dipicolinic Acid ◽  
Green Emission ◽  
Ratiometric Fluorescence ◽  
Green Method ◽  
Lake Water Sample ◽  
Bacillus Anthracis Spores ◽  
Anthrax Spores ◽  
Emission Effect

Efficient and instant detection of biological threat-agent anthrax is highly desired in the fields of medical care and anti-terrorism. Herein, a new ratiometric fluorescence (FL) nanoprobe was elaborately tailored for the determination of 2,6-dipicolinic acid (DPA), a biomarker of anthrax spores, by grafting terbium ions (Tb3+) to the surface of carbon dots (CDs). CDs with blue FL were fabricated by a simple and green method using schizochytrium as precursor and served as an FL reference and a supporting substrate for coordination with Tb3+. On account of the absorbance energy transfer emission effect (AETE), green emission peaks of Tb3+ in CDs-Tb nanoprobe appeared at 545 nm upon the addition of DPA. Under optimal conditions, good linearity between the ratio FL intensity of F545/F445 and the concentrations of DPA was observed within the experimental concentration range of 0.5–6 μM with the detection limit of 35.9 nM, which is superior to several literature studies and significantly lower than the infectious dosage of the Bacillus anthracis spores. Moreover, the CDs-Tb nanoprobe could sensitively detect DPA in the lake water sample. This work offers an efficient self-calibrating and background-free method for the determination of DPA.

Ratiometric fluorescence determination of the anthrax biomarker 2,6-dipicolinic acid using a Eu3+/Tb3+-doped nickel coordination polymer

2019 ◽  
Vol 43 (46) ◽  
pp. 18259-18267 ◽  
Author(s):  
Hang Lei ◽  
Cui-Xing Qi ◽  
Xuan-Bo Chen ◽  
Tian Zhang ◽  
Ling Xu ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Dipicolinic Acid ◽  
High Sensitivity ◽  
Fluorescence Sensor ◽  
Rapid Response ◽  
Ratiometric Fluorescence ◽  
Fluorescence Determination

Tb3+0.6/Eu3+0.4@Ni-BTC is a quantitative ratiometric fluorescence sensor for DPA detection with high sensitivity, anti-interference, rapid response and durability.

A ratiometric fluorescence strategy based on polyethyleneimine surface-modified carbon dots and Eosin Y for ultrasensitive determination of protamine and trypsin.

The Analyst ◽  
2022 ◽  
Author(s):  
Wenying Sun ◽  
Feng Zhang ◽  
Mengke Wang ◽  
Nan Wang ◽  
Guannan Wang ◽  
...  
Keyword(s):  
Electrostatic Interaction ◽  
Carbon Dots ◽  
Detection System ◽  
Fluorescence Emission ◽  
Eosin Y ◽  
Ratiometric Fluorescence ◽  
Surface Modified ◽  
Emission Detection ◽  
Positively Charged

In this work, we established a novel and ultrasensitive dual-signal fluorescence emission detection system of protamine and trypsin based on the electrostatic interaction between polyethyleneimine (PEI) surface-modified positively charged carbon...

scholarly journals Ratiometric fluorescence probe of Cu2+ and biothiols by using carbon dots and copper nanoclusters

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33662-33674
Author(s):  
Ning Zhao ◽  
Jianqiang Song ◽  
Zheng Huang ◽  
Xiuying Yang ◽  
Yousheng Wang ◽  
...  
Keyword(s):  
Simultaneous Determination ◽  
Fluorescent Probe ◽  
Carbon Dots ◽  
Fluorescence Probe ◽  
Ratiometric Fluorescence ◽  
Copper Nanoclusters ◽  
Dual Mechanism ◽  
Fluorescent Carbon Dots ◽  
Ratiometric Fluorescent Probe

A dual-mechanism ratiometric fluorescent probe based on N-doped yellow fluorescent carbon dots (y-CDs) and blue fluorescent copper nanoclusters (CuNCs) was established for the first simultaneous determination of Cu2+ and biothiols.

One-pot facile synthesis of yellow-green emission carbon dots for rapid and efficient determination of progesterone

2021 ◽  
pp. 150686
Author(s):  
Minghui Zan ◽  
Shuai An ◽  
Lei Cao ◽  
Yulu Liu ◽  
Li Li ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Green Emission ◽  
Facile Synthesis ◽  
One Pot

Carbon dots derived from Fusobacterium nucleatum for intracellular determination of Fe3+ and bioimaging both in vitro and in vivo

2021 ◽  
Author(s):  
Lijuan Liu ◽  
Shengting Zhang ◽  
Xiaodan Zheng ◽  
Hongmei Li ◽  
Qi Chen ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Fusobacterium Nucleatum ◽  
Living Cells ◽  
First Time ◽  
Fluorescent Carbon Dots ◽  
Fluorescent Carbon

Fusobacterium nucleatum has been employed for the first time to synthesize fluorescent carbon dots which could be applied for the determination of Fe3+ ions in living cells and bioimaging in vitro and in vivo with excellent biocompatibility.

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