Highly stable quantum dots with silica–poly(EGDMA-co-MAA) synergistic protection and the preliminary application in immunoassay

2013 ◽  
Vol 1 (8) ◽  
pp. 1156 ◽  
Author(s):  
Junqing Liu ◽  
Tao Song ◽  
Qiuhua Yang ◽  
Jian Tan ◽  
Dinghai Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Stable Quantum ◽  
Preliminary Application

scholarly journals Chlorine Modulation Fluorescent Performance of Seaweed-Derived Graphene Quantum Dots for Long-Wavelength Excitation Cell-Imaging Application

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4994
Author(s):  
Weitao Li ◽  
Ningjia Jiang ◽  
Bin Wu ◽  
Yuan Liu ◽  
Luoman Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cell Imaging ◽  
Graphene Quantum Dots ◽  
Toxic Metal ◽  
Disease Diagnosis ◽  
Excitation Wavelength ◽  
Chlorine Atoms ◽  
Long Wavelength ◽  
Imaging Application ◽  
Preliminary Application

Biological imaging is an essential means of disease diagnosis. However, semiconductor quantum dots that are used in bioimaging applications comprise toxic metal elements that are nonbiodegradable, causing serious environmental problems. Herein, we developed a novel ecofriendly solvothermal method that uses ethanol as a solvent and doping with chlorine atoms to prepare highly fluorescent graphene quantum dots (GQDs) from seaweed. The GQDs doped with chlorine atoms exhibit high-intensity white fluorescence. Thus, their preliminary application in bioimaging has been confirmed. In addition, clear cell imaging could be performed at an excitation wavelength of 633 nm.

Stable Quantum Dots/Polymer Matrix and Their Versatile 3D Printing Frameworks

2021 ◽  
Author(s):  
Ruda Xu ◽  
Qiao Chen ◽  
Min Xia ◽  
Bing Bai ◽  
Yuemei Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
3D Printing ◽  
Polymer Matrix ◽  
Industrial Applications ◽  
Efficient Utilization ◽  
Stable Quantum ◽  
Bulk Scale ◽  
Scale Matrix

Efficient utilization of quantum dots (QDs) in bulk-scale matrix with good enough performance but small quantity is important in real industrial applications. Including the concern of traditional problems of QDs,...

Simultaneous Phenotype-Specific Telomere Length Measured by Flow-FISH Using Thermally Stable Quantum Dots

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 4908-4908
Author(s):  
Veena Kapoor ◽  
Fran Hakim ◽  
Najibah Rehman ◽  
Ronald E Gress ◽  
William G Telford
Keyword(s):  
Quantum Dots ◽  
Telomere Length ◽  
Internal Standard ◽  
Fluorescent Labeling ◽  
Single Sample ◽  
Cell Populations ◽  
Phenotypic Analysis ◽  
Internal Reference ◽  
Stable Quantum ◽  
Good Signal

Abstract The Flow-FISH technique used to measure telomere length by incorporation of fluorescein-labeled oligonucleotide probes complementary to telomeres repeat sequences has been extended to permit simultaneous multiple phenotypic analysis within a single sample. The necessary thermal stability of the fluorescent labeling needed for phenotyping cell populations can be achieved using quantum dots instead of conventional organic fluorophores, which are usually damaged during the high-temperature hybridization treatment and lose their fluorescence, limiting their usefulness for phenotypic analysis. In this study, quantum dots and conventional fluorophores were compared for their ability to survive the 82oC hybridization step necessary for PNA probe annealing. Quantum dots preserved their fluorescence following heat treatment and gave good signal-to-noise ratios when used to detect lymphocyte and monocyte markers (CD3, CD4 and CD14). This was in contrast to phycobiliproteins and low molecular weight fluorochromes such as fluorescein and the Alexa Fluor dyes, which decreased considerably in fluorescence following hybridization. Since addition of fluorescent immunophenotyping complicated an assay already heavily dependent on uniform technique, internal reference standards (previously reported by Lansdorp) were particularly critical in this technique. We used aliquoted frozen calf thymocytes (CT) as an internal standard, determining their telomere length and incorporating them into each sample to monitor tube to tube and day to day assay variability. The telomere length of the CTs and of CD3+CD4+, CD3+CD4− and CD14+, were determined and then corrected by normalization to the known CT telomere length. To validate the overall method, we then measured age dependence on telomere length for monocyte and lymphocyte subpopulations in young, middle-aged and older donors. Results were consistent with results previously reported using traditional Southern blotting and Flow-FISH with no immunphenotyping, suggesting that incorporation of immunolabeling did not adversely affect this technique. This method allows for the rapid, accurate and simultaneous determination of the telomere lengths of different cell populations within a single sample when little amount of sample is available.

scholarly journals Chemically resistant and thermally stable quantum dots prepared by shell encapsulation with cross-linkable block copolymer ligands

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Jaewan Ko ◽  
Byeong Guk Jeong ◽  
Jun Hyuk Chang ◽  
Joonyoung F. Joung ◽  
Suk-Young Yoon ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Block Copolymer ◽  
Thermally Stable ◽  
Stable Quantum

Gemini surfactant for fluorescent and stable quantum dots in aqueous solution

2007 ◽  
Vol 18 (20) ◽  
pp. 205603 ◽  
Author(s):  
Haibing Li ◽  
Xiaoqiong Wang ◽  
Zhinong Gao ◽  
Zhike He
Keyword(s):  
Aqueous Solution ◽  
Quantum Dots ◽  
Gemini Surfactant ◽  
Stable Quantum

Colloidal stable quantum dots modified by dual functional group polymers for inkjet printing

2017 ◽  
Vol 5 (19) ◽  
pp. 4629-4635 ◽  
Author(s):  
Ting Han ◽  
Ye Yuan ◽  
Xiao Liang ◽  
Yang Zhang ◽  
Chuanxi Xiong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Inkjet Printing ◽  
Colloidal Stability ◽  
Functional Group ◽  
Water Dispersible ◽  
Dual Functional ◽  
Stable Quantum

A new ligand was reported to effectively prepare water-dispersible QDs with remarkable colloidal stability for inkjet printing.

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