Cathodic electrochemiluminescence behaviour of MoS2 quantum dots and its biosensing of microRNA-21

The Analyst ◽  
2018 ◽  
Vol 143 (15) ◽  
pp. 3702-3707 ◽  
Author(s):  
Jun-Tao Cao ◽  
Fu-Rao Liu ◽  
Fang Hou ◽  
Juan Peng ◽  
Shu-Wei Ren ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Potassium Peroxydisulfate ◽  
First Time

The cathodic electrochemiluminescence (ECL) behaviour of nontoxic MoS2 quantum dots (QDs) was studied for the first time using potassium peroxydisulfate as the co-reactant.

ELECTRON STRUCTURE INVESTIGATIONS OF InGaP/GaAs(100) HETEROSTRUCTURES WITH InP QUANTUM DOTS

2007 ◽  
Vol 06 (03n04) ◽  
pp. 215-219
Author(s):  
E. P. DOMASHEVSKAYA ◽  
V. A. TEREKHOV ◽  
V. M. KASHKAROV ◽  
S. YU. TURISHCHEV ◽  
S. L. MOLODTSOV ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Emission Spectra ◽  
Luminescence Spectra ◽  
Partial Density ◽  
Edge Structure ◽  
X Ray ◽  
Metal Organic ◽  
Structure Investigations ◽  
First Time ◽  
Inp Quantum Dots

Ultrasoft X-ray emission spectra (USXES) and X-ray absorption near-edge structure (XANES) spectra with the use of synchrotron radiation in the range of P L2,3-edges were obtained for the first time for nanostructures with InP quantum dots grown on GaAs 〈100〉 substrates by vapor-phase epitaxy from metal–organic compounds. These spectra represent local partial density of states in the valence and conduction bands. The additional XANES peak is detected; its intensity depends on the number of monolayers forming quantum dots. Assumptions are made on the band-to-band origin of luminescence spectra in the studied nanostructures.

scholarly journals Protection of Petroleum Pipeline Carbon Steel Alloys with New Modified Core-Shell Magnetite Nanogel against Corrosion in Acidic Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Gamal A. El Mahdy ◽  
Ayman M. Atta ◽  
Amro K. F. Dyab ◽  
Hamad A. Al-Lohedan
Keyword(s):  
Carbon Steel ◽  
Sulfonic Acid ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Core Shell ◽  
Magnetite Nanoparticle ◽  
Potassium Peroxydisulfate ◽  
Redox Initiator ◽  
Initiator System ◽  
First Time

New method was used to prepare magnetite nanoparticle based on reduction of Fe(III) ions with potassium iodide to produce Fe3O4nanoparticle. The prepared magnetite was stabilized with cross-linked polymer based on 2-acrylamido-2-methylpropane sulfonic acid (AMPS to prepare novel core-shell nanogel. In this respect, Fe3O4/poly(2-acrylamido-2-methylpropane sulfonic acid) (PAMPS) magnetic nanogels with controllable particle size produced via free aqueous polymerization at 65°C have been developed for the first time. The polymer was crosslinked in the presence of N,N-methylenebisacrylamide (MBA) as a crosslinker and potassium peroxydisulfate (KPS) as redox initiator system. The structure and morphology of the magnetic nanogel were characterized by Fourier transform infrared spectroscopy (FTIR) and transmission and scanning electron microscopy (TEM and SEM). The effectiveness of the synthesized compounds as corrosion inhibitors for carbon steel in 1 M HCl was investigated by various electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results showed enhancement in inhibition efficiencies with increasing the inhibitor concentrations. The results showed that the nanogel particles act as mixed inhibitors. EIS data revealed thatRctincreases with increasing inhibitor concentration.

Green synthesis of fluorescent carbon quantum dots for the detection of mercury(ii) and glutathione

2018 ◽  
Vol 42 (8) ◽  
pp. 5814-5821 ◽  
Author(s):  
Daraksha Bano ◽  
Vijay Kumar ◽  
Vikas Kumar Singh ◽  
Syed Hadi Hasan
Keyword(s):  
Quantum Dots ◽  
Green Synthesis ◽  
Carbon Quantum Dots ◽  
First Time ◽  
Fluorescent Carbon

On–off–on detection of Hg2+ and GSH using green-synthesized CQDs from T. indica leaves for the first time.

All-inorganic Cs2CuX4 (X = Cl, Br, and Br/I) perovskite quantum dots with blue-green luminescence

2018 ◽  
Vol 54 (82) ◽  
pp. 11638-11641 ◽  
Author(s):  
Pan Yang ◽  
Guoning Liu ◽  
Badi Liu ◽  
Xindi Liu ◽  
Yongbing Lou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lead Free ◽  
Green Luminescence ◽  
Perovskite Quantum Dots ◽  
First Time

Lead-free, all-inorganic copper based perovskite Cs2CuX4 (X = Cl, Br, and Br/I) quantum dots were synthesized and investigated for the first time.

Large Stokes Shifted Quaternary Copper Cadmium Sulfide Selenide Quantum Dots Waveguides

2021 ◽  
Author(s):  
Dipanwita Roy ◽  
Piyush Kanti Sarkar ◽  
Amit Dalui ◽  
Uttam Kumar Ghorai ◽  
Dharmendra K Gupta ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cadmium Sulfide ◽  
Stokes Shift ◽  
Colloidal Synthesis ◽  
Synthesis Route ◽  
Luminescence Efficiency ◽  
First Time

Stokes shift engineering of quantum dots is an attractive approach to enhance luminescence efficiency by reducing reabsorption losses. We report for the first time the colloidal synthesis route of a...

Crystalline quantum dots of covalent organic frameworks for fast and sensitive detection of uranium

2020 ◽  
Vol 56 (6) ◽  
pp. 880-883 ◽  
Author(s):  
Meicheng Zhang ◽  
Yang Li ◽  
Lijian Ma ◽  
Xinghua Guo ◽  
Xiaofeng Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Sensitive Detection ◽  
Covalent Organic Frameworks ◽  
First Time

A crystalline quantum dot of a COF was prepared for the first time by original BRB method for fast uranium detection.

scholarly journals Formation of ZnO/Zn0.5Cd0.5Se Alloy Quantum Dots in the Presence of High Oleylamine Contents

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 999
Author(s):  
Yi-An Chen ◽  
Kuo-Hsien Chou ◽  
Yi-Yang Kuo ◽  
Cheng-Ye Wu ◽  
Po-Wen Hsiao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Quantum Dots ◽  
Particle Size ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Transmission Electron ◽  
Average Size ◽  
Alloy Quantum Dots ◽  
First Time

To the best of our knowledge, this report presents, for the first time, the schematic of the possible chemical reaction for a one-pot synthesis of Zn0.5Cd0.5Se alloy quantum dots (QDs) in the presence of low/high oleylamine (OLA) contents. For high OLA contents, high-resolution transmission electron microscopy (HRTEM) results showed that the average size of Zn0.5Cd0.5Se increases significantly from 4 to 9 nm with an increasing OLA content from 4 to 10 mL. First, [Zn(OAc)2]–OLA complex can be formed by a reaction between Zn(OAc)2 and OLA. Then, Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) data confirmed that ZnO is formed by thermal decomposition of the [Zn(OAc)2]–OLA complex. The results indicated that ZnO grew on the Zn0.5Cd0.5Se surface, thus increasing the particle size. For low OLA contents, HRTEM images were used to estimate the average sizes of the Zn0.5Cd0.5Se alloy QDs, which were approximately 8, 6, and 4 nm with OLA loadings of 0, 2, and 4 mL, respectively. We found that Zn(OAc)2 and OLA could form a [Zn(OAc)2]–OLA complex, which inhibited the growth of the Zn0.5Cd0.5Se alloy QDs, due to the decreasing reaction between Zn(oleic acid)2 and Se2−, which led to a decrease in particle size.

Precise size separation of water-soluble red-to-near-infrared-luminescent silicon quantum dots by gel electrophoresis

Nanoscale ◽  
2020 ◽  
Vol 12 (16) ◽  
pp. 9266-9271
Author(s):  
Minoru Fujii ◽  
Akiko Minami ◽  
Hiroshi Sugimoto
Keyword(s):  
Quantum Dots ◽  
Standard Method ◽  
Gel Electrophoresis ◽  
Near Infrared ◽  
Water Soluble ◽  
Silicon Quantum Dots ◽  
Size Separation ◽  
First Time ◽  
Si Quantum Dots

Gel electrophoresis, which is a standard method for separation and analysis of macromolecules such as DNA, RNA and proteins, is applied for the first time to silicon (Si) quantum dots (QDs) for size separation.

Heterogeneous structured MoSe2–MoO3 quantum dots with enhanced sodium/potassium storage

2020 ◽  
Vol 8 (44) ◽  
pp. 23395-23403
Author(s):  
Wen Liu ◽  
Jujun Yuan ◽  
Youchen Hao ◽  
Hirbod Maleki Kheimeh Sari ◽  
Jingjing Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Electrochemical Performance ◽  
Heterogeneous Structure ◽  
Sodium Potassium ◽  
Self Assembled ◽  
First Time

A quantum dot-assisted self-assembled MoSe2–MoO3 heterogeneous structure is investigated for sodium/potassium storage for the first time. The quantum dot-assisted self-assembled MoSe2–MoO3 anode possesses a better electrochemical performance.

Core–shell ZnSe–CdSe quantum dots: a facile approach via decomposition of cyclohexeno-1,2,3-selenadiazole

RSC Advances ◽  
2014 ◽  
Vol 4 (34) ◽  
pp. 17526-17532 ◽  
Author(s):  
Sreenu Bhanoth ◽  
Priyesh V. More ◽  
Aditi Jadhav ◽  
Pawan K. Khanna
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Synthesis Method ◽  
Core Shell ◽  
Cdse Quantum Dots ◽  
First Time

For the first time ever cyclohexeno-1,2,3-selenadiazole (SDZ) has been employed for the synthesis of core–shell ZnSe–CdSe quantum dots thus promoting an eco-friendly and reasonably less toxic synthesis method for such quantum dot hetero-structures.

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