Preparation and Characterization of Water-soluble Carbon Quantum Dots/Mesoporous Silica with High Fluorescence Intensity

2017 ◽  
Vol 46 (6) ◽  
pp. 895-898 ◽  
Author(s):  
Youliang Cheng ◽  
Mengsha Bai ◽  
Changqing Fang ◽  
Mannan Yang
Keyword(s):  
Quantum Dots ◽  
Mesoporous Silica ◽  
Fluorescence Intensity ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
High Fluorescence Intensity ◽  
High Fluorescence ◽  
Soluble Carbon

Rational design of fluorescent barcodes for suspension array through a simple simulation strategy

The Analyst ◽  
2021 ◽  
Author(s):  
Bo Zhang ◽  
Wan-Sheng Tang ◽  
Shou-Nian Ding
Keyword(s):  
Quantum Dots ◽  
Size Distribution ◽  
Fluorescence Intensity ◽  
Rational Design ◽  
Suspension Array ◽  
Simple Simulation ◽  
Simulation Strategy ◽  
High Fluorescence Intensity ◽  
High Fluorescence ◽  
Excellent Stability

The quantum dots (QDs)-encoded microbeads as optical barcode with high fluorescence intensity and fluorescence uniformity, excellent stability and dispersity are greatly important for suspension array (SA). However, the size distribution...

Green synthesis of carbon quantum dots from lemon peel waste: applications in sensing and photocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72423-72432 ◽  
Author(s):  
Ankit Tyagi ◽  
Kumud Malika Tripathi ◽  
Narendra Singh ◽  
Shashank Choudhary ◽  
Raju Kumar Gupta
Keyword(s):  
Methylene Blue ◽  
Quantum Dots ◽  
Green Synthesis ◽  
Photocatalytic Degradation ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Lemon Peel ◽  
Soluble Carbon

Water soluble carbon quantum dots were synthesized from lemon peel waste and were used for Cr6+ detection and photocatalytic degradation of methylene blue dye.

Synthesis of carbon quantum dots with green luminescence from potato starch

2019 ◽  
Vol 43 (27) ◽  
pp. 10826-10833 ◽  
Author(s):  
Ruibin Qiang ◽  
Shengrong Yang ◽  
Kaiming Hou ◽  
Jinqing Wang
Keyword(s):  
Quantum Dots ◽  
Potato Starch ◽  
Carbon Quantum Dots ◽  
Water Soluble ◽  
Raw Material ◽  
Carbon Precursor ◽  
Biomass Carbon ◽  
Green Luminescence ◽  
Soluble Carbon

Water-soluble carbon quantum dots (CQDs) are synthesized via an acid assisted ultrasonic route using the biomass carbon precursor of potato starch as the raw material.

scholarly journals Water-soluble perylenediimides: design concepts and biological applications

2016 ◽  
Vol 45 (6) ◽  
pp. 1513-1528 ◽  
Author(s):  
Mengmeng Sun ◽  
Klaus Müllen ◽  
Meizhen Yin
Keyword(s):  
Fluorescence Intensity ◽  
Water Soluble ◽  
Biological Applications ◽  
Design Concepts ◽  
High Fluorescence Intensity ◽  
High Fluorescence ◽  
Biological Field

Water-soluble perylenediimides (PDIs) with high fluorescence intensity, photostability and biocompatibility have been successfully prepared and applied in the biological field.

scholarly journals Synthesis and characterization of CdSxSe1−xalloy quantum dots with composition-dependent band gaps and paramagnetic properties

RSC Advances ◽  
2018 ◽  
Vol 8 (52) ◽  
pp. 30002-30011 ◽  
Author(s):  
Yueh-Chi Chung ◽  
Chien-Hsin Yang ◽  
Hao-Wen Zheng ◽  
Ping-Szu Tsai ◽  
Tzong-Liu Wang
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Fluorescence Intensity ◽  
Band Gaps ◽  
Synthesis And Characterization ◽  
Paramagnetic Properties

Both the fluorescence intensity and quantum yield of all the nanocrystals are much enhanced after the CdSxSe1−xQD cores are coated with a ZnS shell.

scholarly journals Synthesis and Properties of Nitrogen-Doped Carbon Quantum Dots Using Lactic Acid as Carbon Source

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 466
Author(s):  
Kaixin Chang ◽  
Qianjin Zhu ◽  
Liyan Qi ◽  
Mingwei Guo ◽  
Woming Gao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lactic Acid ◽  
Fluorescence Quenching ◽  
Functional Groups ◽  
Fluorescence Intensity ◽  
Carbon Quantum Dots ◽  
Nitrogen Doped ◽  
Ph Values ◽  
Wide Range ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon quantum dots (N-CQDs) were synthesized in a one-step hydrothermal technique utilizing L-lactic acid as that of the source of carbon and ethylenediamine as that of the source of nitrogen, and were characterized using dynamic light scattering, X-ray photoelectron spectroscopy ultraviolet-visible spectrum, Fourier-transformed infrared spectrum, high-resolution transmission electron microscopy, and fluorescence spectrum. The generated N-CQDs have a spherical structure and overall diameters ranging from 1–4 nm, and their surface comprises specific functional groups such as amino, carboxyl, and hydroxyl, resulting in greater water solubility and fluorescence. The quantum yield of N-CQDs (being 46%) is significantly higher than that of the CQDs synthesized from other biomass in literatures. Its fluorescence intensity is dependent on the excitation wavelength, and N-CQDs release blue light at 365 nm under ultraviolet light. The pH values may impact the protonation of N-CQDs surface functional groups and lead to significant fluorescence quenching of N-CQDs. Therefore, the fluorescence intensity of N-CQDs is the highest at pH 7.0, but it decreases with pH as pH values being either more than or less than pH 7.0. The N-CQDs exhibit high sensitivity to Fe3+ ions, for Fe3+ ions would decrease the fluorescence intensity of N-CQDs by 99.6%, and the influence of Fe3+ ions on N-CQDs fluorescence quenching is slightly affected by other metal ions. Moreover, the fluorescence quenching efficiency of Fe3+ ions displays an obvious linear relationship to Fe3+ concentrations in a wide range of concentrations (up to 200 µM) and with a detection limit of 1.89 µM. Therefore, the generated N-CQDs may be utilized as a robust fluorescence sensor for detecting pH and Fe3+ ions.

Synthesis and characterization of highly luminescent N-doped carbon quantum dots for metal ion sensing

2018 ◽  
Vol 186 (1) ◽  
pp. 32-39 ◽  
Author(s):  
Sarita Devi ◽  
Amanjot Kaur ◽  
Sudipta Sarkar ◽  
Sujata Vohra ◽  
Sachin Tyagi
Keyword(s):  
Quantum Dots ◽  
Metal Ion ◽  
Carbon Quantum Dots ◽  
Synthesis And Characterization ◽  
Ion Sensing ◽  
Metal Ion Sensing
Sign in / Sign up

Export Citation Format

Share Document