scholarly journals Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

2021 ◽  
Author(s):  
Xi Zhou ◽  
Yufeng Cao ◽  
Xinji Zhou ◽  
Lina Xu ◽  
Daihui Zhang ◽  
...  
Keyword(s):  
Detection Methods ◽  
Carbon Nanodots ◽  
Structural Units ◽  
Green Method ◽  
Intracellular Imaging ◽  
Real Samples ◽  
Fluorescence Determination ◽  
Monitoring Applications ◽  
Precursor Molecules ◽  
Structural Memory

Ag+ pollution is great of harm to the human body and the biology. Therefore, it is an urgent need to develop inexpensive and accurate detection methods. Herein, lignin-derived structural memory carbon nanodots (CSM-dots) with outstanding fluorescence property were fabricated via a green method, which reserve functional and structural units of the precursor molecules. The CSM-dots could specifically bind Ag+, accompanied with a remarkable fluorescence quenching response. This “turn-off” fluorescence behavior was used for Ag+ determination in a linear range of 5-290 μM with the detection limit as low as 500 nM. Furthermore, the finding showed that this sensing nano-platform was successfully used for Ag+ determination in real samples and intracellular imaging, showing great potential in biological and environmental monitoring applications.

scholarly journals Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2687
Author(s):  
Xi Zhou ◽  
Yufeng Cao ◽  
Xinji Zhou ◽  
Lina Xu ◽  
Daihui Zhang ◽  
...  
Keyword(s):  
Active Sites ◽  
Specific Interaction ◽  
Silver Ions ◽  
Detection Methods ◽  
Carbon Nanodots ◽  
Environmental Biology ◽  
Intracellular Imaging ◽  
Monitoring Applications ◽  
Methoxy Groups ◽  
Structural Memory

Ag+ pollution is of great harm to the human body and environmental biology. Therefore, there is an urgent need to develop inexpensive and accurate detection methods. Herein, lignin-derived structural memory carbon nanodots (CSM-dots) with outstanding fluorescence properties were fabricated via a green method. The mild preparation process allowed the CSM-dots to remain plentiful phenol, hydroxyl, and methoxy groups, which have a specific interaction with Ag+ through the reduction of silver ions. Further, the sulfur atoms doped on CSM-dots provided more active sites on their surface and the strong interaction with Ag nanoparticles. The CSM-dots can specifically bind Ag+, accompanied by a remarkable fluorescence quenching response. This “turn-off” fluorescence behavior was used for Ag+ determination in a linear range of 5–290 μM with the detection limit as low as 500 nM. Furthermore, findings showed that this sensing nano-platform was successfully used for Ag+ determination in real samples and intracellular imaging, showing great potential in biological and environmental monitoring applications.

Red-emissive carbon nanodots for highly sensitive ferric(iii) ion sensing and intracellular imaging

The Analyst ◽  
2021 ◽  
Author(s):  
Ruhong Yan ◽  
Zhenzhen Guo ◽  
Xifeng Chen ◽  
Longhai Tang ◽  
Mingyuan Wang ◽  
...  
Keyword(s):  
Carbon Nanodots ◽  
Microwave Method ◽  
Sensitive Analysis ◽  
Intracellular Imaging ◽  
Ion Sensing ◽  
Highly Sensitive

Red-emissive carbon nanodots are prepared via a microwave method for highly sensitive analysis of Fe3+.

Quinoline derivative-functionalized carbon dots as a fluorescent nanosensor for sensing and intracellular imaging of Zn2+

2014 ◽  
Vol 2 (31) ◽  
pp. 5020-5027 ◽  
Author(s):  
Zhaomin Zhang ◽  
Yupeng Shi ◽  
Yi Pan ◽  
Xin Cheng ◽  
Lulu Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Carbon Dots ◽  
Quinoline Derivative ◽  
Carbon Nanodots ◽  
Quinoline Derivatives ◽  
Intracellular Imaging ◽  
Highly Sensitive

Functionalization of carbon nanodots (C-dots) with quinoline derivatives enables a highly sensitive and specific nanosensor for Zn2+ sensing in aqueous solution and Zn2+ imaging in vivo.

Fluorescence Determination of Nitrite in Water Using Prawn-Shell Derived Nitrogen-Doped Carbon Nanodots as Fluorophores

ACS Sensors ◽  
2016 ◽  
Vol 1 (7) ◽  
pp. 875-881 ◽  
Author(s):  
Haimin Zhang ◽  
Shenghong Kang ◽  
Guozhong Wang ◽  
Yunxia Zhang ◽  
Huijun Zhao
Keyword(s):  
Carbon Nanodots ◽  
Nitrogen Doped ◽  
Fluorescence Determination ◽  
Nitrogen Doped Carbon

In situ growth of Ag/Ag2O nanoparticles on g-C3N4 by a natural carbon nanodot-assisted green method for synergistic photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 3186-3197 ◽  
Author(s):  
Zhifeng Jiang ◽  
Jimin Xie
Keyword(s):  
Photocatalytic Activity ◽  
Treatment Approach ◽  
Carbon Nanodots ◽  
In Situ Growth ◽  
Green Method ◽  
Visible Light Driven ◽  
Natural Carbon ◽  
Ag2o Nanoparticles ◽  
First Time

Novel visible-light-driven Ag/Ag2O@g-C3N4 hybrid materials were synthesized successfully via a green, facile hydrothermal treatment approach by reducing AgNO3 with carbon nanodots for the first time.

Carbon nanodots prepared for cellular imaging and turn-on detection of glutathione

2016 ◽  
Vol 8 (23) ◽  
pp. 4736-4743 ◽  
Author(s):  
Depeng Kong ◽  
Fanyong Yan ◽  
Yunmei Luo ◽  
Yinyin Wang ◽  
Li Chen ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Fluorescent Probes ◽  
Cellular Imaging ◽  
Carbon Nanodots ◽  
Intracellular Imaging ◽  
Turn On ◽  
Highly Sensitive ◽  
One Step

Carbon nanodots as fluorescent probes were synthesized through a one-step hydrothermal method. The carbon nanodots can be used not only for multicolor intracellular imaging but also for highly sensitive and selective turn-on detection of glutathione.

scholarly journals Synthesis of hydrophobic photoluminescent carbon nanodots by using L-tyrosine and citric acid through a thermal oxidation route

2014 ◽  
Vol 5 ◽  
pp. 1513-1522 ◽  
Author(s):  
Venkatesh Gude
Keyword(s):  
Citric Acid ◽  
Thermal Oxidation ◽  
Hydroxy Group ◽  
Oxidation Process ◽  
Upconversion Emission ◽  
Carbon Nanodots ◽  
Excitation Wavelength ◽  
H Nmr ◽  
Crystalline Nature ◽  
Precursor Molecules

Hydrophobic photoluminescent carbon nanodots (CNDs) were fabricated by using citric acid and L-tyrosine precursor molecules through a simple, facile thermal oxidation process in air. These CNDs (less than 4 nm in size) exhibited a characteristic excitation wavelength dependent emission and upconversion emission properties and are insoluble in water, but soluble in organic solvents. FTIR and 1H NMR analyses showed a selective participation of L-tyrosine molecule during the carbonization process at 220 °C without a disturbance of its benzylic protons and aromatic phenyl ring bearing hydroxy group. TEM and XRD studies revealed a quasi-spherical morphology and poor-crystalline nature of CNDs. Because the presence of the hydroxy group of L-tyrosine is dominating at the surface, these CNDs are also soluble in water under basic conditions. The effects of base and silver nanoparticles on the luminescence properties of CNDs were studied and a quenching of fluorescence was observed. These tyrosine-passivated CNDs are applicable for both biologically and commercially.

scholarly journals A New “Turn-On” Fluorescence Probe for Al3+ Detection and Application Exploring in Living Cell and Real Samples

2019 ◽  
Vol 9 (3) ◽  
pp. 577 ◽  
Author(s):  
Zhi-Yan Gao ◽  
Cui-Jiao Zhang ◽  
Xian Zhang ◽  
Shu Xing ◽  
Jin-Shui Yao ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
Fluorescence Spectra ◽  
High Selectivity ◽  
Fluorescence Probe ◽  
High Sensitivity ◽  
Intracellular Imaging ◽  
Real Samples ◽  
Turn On ◽  
Base Derivative ◽  
Analog Experiments

An excess of Al3+ will lead to biological disorders and even many diseases. Therefore, detecting the levels of Al3+ in the human body has drawn great attention for health monitoring. The fluorescence method has been broadly applied because of high sensitivity, real-time detection, and intracellular imaging. In this work, a new probe with “turn-on” fluorescence based on Schiff base derivative, 3,6-imine-triphenylamine-(9-ethyl) carbazole (ITEC), has been successfully synthesized and studied. The high selectivity and sensitivity of ITEC to Al3+ were verified by fluorescence spectra and the detection limit was 2.19 nmol/L. A 1:2 stoichiometry of ITEC-Al3+ was obtained by the 1H NMR spectra and Job’s plot. Furthermore, ITEC was successfully applied to the detection of Al3+ with different concentrations in living HeLa cells. The analog experiments about nature contamination of Al3+ in cells and real samples were finished.

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