Intriguing cysteine induced improvement of the emissive property of carbon dots with sensing applications

2015 ◽  
Vol 17 (4) ◽  
pp. 2394-2403 ◽  
Author(s):  
Jayasmita Jana ◽  
Mainak Ganguly ◽  
Tarasankar Pal
Keyword(s):  
Detection Limit ◽  
Carbon Dots ◽  
Significant Extent ◽  
Sensing Applications ◽  
Emissive Property

Cysteine rescues the quenched fluorescence of alkaline DA to a significant extent, and thus provides a way for cysteine sensing. Further improvement in detection limit occursviaMHT treatment.

scholarly journals Recent advances of biomass carbon dots on syntheses, characterization, luminescence mechanism, and sensing applications

Nano Select ◽  
2021 ◽  
Author(s):  
Ying Lou ◽  
Xinyu Hao ◽  
Lei Liao ◽  
Kaiyou Zhang ◽  
Shuoping Chen ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Biomass Carbon ◽  
Sensing Applications ◽  
Recent Advances

Carbon dots isolated from chromatographic fractions for sensing applications

RSC Advances ◽  
2015 ◽  
Vol 5 (129) ◽  
pp. 106838-106847 ◽  
Author(s):  
Lizhen Liu ◽  
Feng Feng ◽  
Man Chin Paau ◽  
Qin Hu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Fluorescent Probes ◽  
Carbon Dots ◽  
Sensitive Detection ◽  
Sensing Applications

An as-synthesised C-dots sample derived from acetic acid, NAC and P2O5 can be separated and fractionated into various C-dots species by HPLC. The brighter C-dots fractions can be used as fluorescent probes for sensitive detection of Fe3+ and Hg2+.

Multifunctional sensing applications of biocompatible N-doped carbon dots as pH and Fe3+ sensors

2019 ◽  
Vol 149 ◽  
pp. 103981 ◽  
Author(s):  
Xu Chen ◽  
Jianliang Bai ◽  
Yusha Ma ◽  
Guojun Yuan ◽  
Jing Mei ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Sensing Applications ◽  
Doped Carbon Dots

Carbon dots: synthesis, formation mechanism, fluorescence origin and sensing applications

2019 ◽  
Vol 21 (3) ◽  
pp. 449-471 ◽  
Author(s):  
Meng Li Liu ◽  
Bin Bin Chen ◽  
Chun Mei Li ◽  
Cheng Zhi Huang
Keyword(s):  
Green Chemistry ◽  
Green Synthesis ◽  
Formation Mechanism ◽  
Carbon Dots ◽  
Recent Progress ◽  
Fluorescence Sensing ◽  
Sensing Applications

We systematically summarize the recent progress in the green synthesis and formation mechanism of CDs with the hope to provide guidance for developing CDs with the concept of green chemistry. In addition, we discuss and organize the current opinions on the fluorescence origin of CDs and the latest progress of CDs in fluorescence sensing applications.

scholarly journals Eco-Friendly Sustainable Fluorescent Carbon Dots for the Adsorption of Heavy Metal Ions in Aqueous Environment

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 315 ◽  
Author(s):  
Musa Yahaya Pudza ◽  
Zurina Zainal Abidin ◽  
Suraya Abdul Rashid ◽  
Faizah Md Yasin ◽  
A. S. M. Noor ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Carbon Dots ◽  
Heavy Metal Ions ◽  
Active Sites ◽  
Adsorption Process ◽  
Coefficient Of Determination ◽  
Aqueous Environment ◽  
Order Kinetic ◽  
Sensing Applications

The materials and substances required for sustainable water treatment by adsorption technique, are still being researched widely by distinguished classes of researchers. Thus, the need to synthesize substances that can effectively clean up pollutants from the environment cannot be overemphasized. So far, materials in bulk forms that are rich in carbon, such as biochar and varieties of activated carbon have been used for various adsorptive purposes. The use of bulk materials for such purposes are not efficient due to minimal surface areas available for adsorption. This study explores the adsorption task at nano dimension using carbon dots (CDs) from tapioca. The properties of carbon structure and its influence on the adsorptive efficacy of carbon nanoparticles were investigated by energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), high resolution transmission electron microscopy (HrTEM), and atomic force microscopy (AFM). The results implied carbon present in CDs are good adsorbents for effective adsorption of heavy metal ions (lead) with removal efficiency of 80.6% in aqueous environment. The adsorption process as explored by both Langmuir and Freundlich isotherms have proven favorability of the adsorption process. Langmuir form two and three have correlation coefficients R2 at 0.9922 and 0.9912, respectively. The Freundlich isotherm confirms CDs as having defined surface heterogeneity and the exponential distribution of active sites. The adsorption of lead unto CDs obeyed the second order kinetic model with coefficient of determination, R2 of 0.9668 and 0.9996 at an initial lead concentration of 20 mg/L and 100 mg/L, respectively. The findings validated the efficiency of CDs derived from tapioca as an excellent material for further utilization in the environmental fields of wastewater pollution detection and clean up, bio-imaging, and chemical sensing applications.

Ultrafast synthesis of nitrogen-doped carbon dots via neutralization heat for bioimaging and sensing applications

RSC Advances ◽  
2014 ◽  
Vol 4 (84) ◽  
pp. 44504-44508 ◽  
Author(s):  
Xiao-Mi Wei ◽  
Yang Xu ◽  
Yu-Hao Li ◽  
Xue-Bo Yin ◽  
Xi-Wen He
Keyword(s):  
Boronic Acid ◽  
Carbon Dots ◽  
Zebrafish Embryo ◽  
Hydroxyl Groups ◽  
Nitrogen Doped ◽  
Sensing Applications ◽  
Doped Carbon Dots ◽  
Nitrogen Doped Carbon

Ultrafast synthesis (within 2 min) of nitrogen-doped carbon dots was achieved using neutralization heat with glucose as a precursor. The hydroxyl groups on the dots' surface make them easy to conjugate with boronic acid. The dots were used for zebrafish embryo imaging and ovalbumin sensing.

scholarly journals Quantification of EGFR and EGFR-overexpressed cancer cells based on carbon dots@bimetallic CuCo Prussian blue analogue

RSC Advances ◽  
2020 ◽  
Vol 10 (47) ◽  
pp. 28355-28364
Author(s):  
Yingpan Song ◽  
Lina He ◽  
Kun Chen ◽  
Minghua Wang ◽  
Longyu Yang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Prussian Blue ◽  
Cancer Cells ◽  
Carbon Dots ◽  
Prussian Blue Analogue ◽  
Low Detection Limit ◽  
Mcf 7

A bimetallic CuCo Prussian blue analogue (PBA) embedded with carbon dots (CDs) (CD@CuCoPBA)-based aptasensor was developed and exhibits low detection limit toward EGFR (0.42 fg mL−1) and MCF-7 cancer cells (80 cell per mL).

scholarly journals Conjugation of Carbon Dots with β-Galactosidase Enzyme: Surface Chemistry and Use in Biosensing

Molecules ◽  
2019 ◽  
Vol 24 (18) ◽  
pp. 3275 ◽  
Author(s):  
Shiv K. Sharma ◽  
Miodrag Micic ◽  
Shanghao Li ◽  
Benjamin Hoar ◽  
Suraj Paudyal ◽  
...  
Keyword(s):  
Detection Limit ◽  
Surface Functionalization ◽  
Self Assembly ◽  
Carbon Dots ◽  
Response Rate ◽  
High Response Rate ◽  
High Demand ◽  
Sensing Platform ◽  
Therapy Development ◽  
Useful Lifetime

Nanoparticles have been conjugated to biological systems for numerous applications such as self-assembly, sensing, imaging, and therapy. Development of more reliable and robust biosensors that exhibit high response rate, increased detection limit, and enhanced useful lifetime is in high demand. We have developed a sensing platform by the conjugation of β-galactosidase, a crucial enzyme, with lab-synthesized gel-like carbon dots (CDs) which have high luminescence, photostability, and easy surface functionalization. We found that the conjugated enzyme exhibited higher stability towards temperature and pH changes in comparison to the native enzyme. This enriched property of the enzyme was distinctly used to develop a stable, reliable, robust biosensor. The detection limit of the biosensor was found to be 2.9 × 10−4 M, whereas its sensitivity was 0.81 µA·mmol−1·cm−2. Further, we used the Langmuir monolayer technique to understand the surface properties of the conjugated enzyme. It was found that the conjugate was highly stable at the air/subphase interface which additionally reinforces the suitability of the use of the conjugated enzyme for the biosensing applications.

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