scholarly journals Nicotinamide-Functionalized Carbon Quantum Dot as New Sensing Platform for Portable Quantification of Vitamin B12 in Fluorescence, Uv-Vis and Smartphone Triple Mode

2021 ◽  
Author(s):  
Sahar Dadkhah ◽  
Ali Mehdinia ◽  
Ali Jabbari ◽  
Ahmad Manbohi
Keyword(s):  
Quantum Dot ◽  
Vitamin B12 ◽  
Carbon Quantum Dot ◽  
Sensing Platform ◽  
Triple Mode

scholarly journals Nicotinamide-functionalized carbon quantum dot as new sensing platform for portable quantification of vitamin B12 in fluorescence, UV-Vis and smartphone triple mode

2021 ◽  
Author(s):  
Sahar Dadkhah ◽  
Ali Mehdinia ◽  
Ali Jabbari ◽  
Ahmad Manbohi
Keyword(s):  
Quantum Dot ◽  
Vitamin B12 ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Colorimetric Sensing ◽  
Practical Applications ◽  
Carbon Quantum Dot ◽  
Sensing Platform ◽  
Triple Mode

Abstract Development of an efficient, portable and simple nanosensor-based systems with reliable analytical performance for on-site monitoring of vitamin B12 (VB12) are still major problems and a challenging work for quality control of manufacturers. Herein, a new fluorescence, UV-Vis and smartphone triple mode nanosensors were designed for the simultaneous detection of VB12 with high sensitivity and accuracy. A novel nanosensor was synthesized through nicotinamide-functionalizing on carbon quantum dot (NA-CQDs) by an one-step microwave-assisted method with green approaches. The NA-CQDs as new nanosensor showed excellent fluorescence properties and wide linear ranges from 0.1–60 µM with the detection limits of 31.7 nM. Moreover, color changes of NA-CQDs induced by the VB12 could also be detected by UV-Vis spectrophotometer and inhouse-developed application installed on smartphone as a signal reader, simultanusly. The Red, Green and Blue (RGB) intensities of the colorimetric images of NA-CQDs/VB12 system which taken by smartphone's camera converted into quantitative values by the introduced application. A smartphone-integrated with NA-CQDs as colorimetric sensing platform displays good linear ranges (4.16 to 66.6 µM) for on-site determination of VB12 with detection limit of 1.40 µM. The method was successfully applied in the determination of VB12 in complex pharmaceutical supplement formulations without any sample pre-treatment and matrix interfering effects. The recovery results (96.52–105.10%) which are in agreement with the reference methods, demonstrating the capability of the smartphone-assisted colorimetric sensing platform in many on-site practical applications of quality controls.

Fabrication of a highly sensitive electrochemiluminescence chlorpromazine sensor using a Ru(bpy)32+ incorporated carbon quantum dot–gelatin composite film

2017 ◽  
Vol 9 (6) ◽  
pp. 1011-1017 ◽  
Author(s):  
Zhimin Liu ◽  
Fang Zhang ◽  
Lin Cui ◽  
Kang Wang ◽  
Haijun Zhan
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Composite Film ◽  
Carbon Quantum Dots ◽  
Sensitive Detection ◽  
Carbon Quantum Dot ◽  
Sensing Platform ◽  
Highly Sensitive

A novel electrochemiluminescence sensing platform for the sensitive detection of chlorpromazine (CPZ) was fabricated based on a Ru(bpy)32+/carbon quantum dots/gelatin composite film.

In situ polymerization of aniline on carbon quantum dots: a new platform for ultrasensitive detection of glucose and hydrogen peroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (28) ◽  
pp. 21675-21680 ◽  
Author(s):  
Yanmei Zhang ◽  
Xinjian Yang ◽  
Zhiqiang Gao
Keyword(s):  
Hydrogen Peroxide ◽  
Quantum Dots ◽  
Quantum Dot ◽  
In Situ Polymerization ◽  
Carbon Quantum Dots ◽  
Ultrasensitive Detection ◽  
Carbon Quantum Dot ◽  
Sensing Platform ◽  
Highly Sensitive

A simple and highly sensitive carbon quantum dot based sensing platform for glucose and hydrogen peroxide.

High-activity Mo, S co-doped carbon quantum dot nanozyme-based cascade colorimetric biosensor for sensitive detection of cholesterol

2019 ◽  
Vol 7 (44) ◽  
pp. 7042-7051 ◽  
Author(s):  
Lianjing Zhao ◽  
Zepei Wu ◽  
Guannan Liu ◽  
Huiying Lu ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Quantum Dot ◽  
High Activity ◽  
Sensitive Detection ◽  
Colorimetric Sensing ◽  
Carbon Quantum Dot ◽  
Sensing Platform ◽  
Co Doped

A Mo, S co-doped carbon quantum dot nanozyme-based cascade colorimetric sensing platform was fabricated and its application for detection of cholesterol was shown.

scholarly journals Flexible and Transparent Memristive Synapse Based on Polyvinylpyrrolidone/N-doped Carbon Quantum Dot Nanocomposites for Neuromorphic Computing

2021 ◽  
Author(s):  
Tao Zeng ◽  
Zhi Yang ◽  
Jiabing Liang ◽  
Ya Lin ◽  
Yankun Cheng ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Neuromorphic Computing ◽  
Carbon Quantum Dot ◽  
Hardware Implementations

Memristive devices are widely recognized as promising hardware implementations of neuromorphic computing. Herein, a flexible and transparent memristive synapse based on polyvinylpyrrolidone (PVP)/N-doped carbon quantum dot (NCQD) nanocomposites through regulating...

Carbon quantum dot-sensitized hollow TiO2 spheres for high-performance visible light photocatalysis

2021 ◽  
Author(s):  
Xianfeng Zhang ◽  
Zongqun Li ◽  
Shaowen Xu ◽  
Yaowen Ruan
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Performance ◽  
Carbon Quantum Dots ◽  
Visible Light Photocatalysis ◽  
Carbon Quantum Dot ◽  
Visible Light Photocatalytic

TiO2/CQD composites were synthesized through carbon quantum dots covalently attached to the surface of hollow TiO2 spheres for visible light photocatalytic degradation of organics.

Stable Semiconducting Ink Based on a Polypyrrole/Carbon-Quantum-Dot Aqueous Colloidal Suspension: A Potential Sensor for Volatile Organics Present in Food

2017 ◽  
Vol 2 (6) ◽  
pp. 2139-2143 ◽  
Author(s):  
Lopamudra Bhattacharjee ◽  
Kallol Mohanta ◽  
Joghee Ravichandran ◽  
Rama R. Bhattacharjee
Keyword(s):  
Quantum Dot ◽  
Colloidal Suspension ◽  
Volatile Organics ◽  
Carbon Quantum Dot
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