Latest News on Quantum Dots Research: Oct – 2019

Quantum computation with quantum dots

We propose Associate in Nursing implementation of a universal set of one- and two-quantum-bit gates for quantum computation victimization the spin states of coupled single-electron quantum dots. Desired operations ar settled by the gating of the tunneling barrier between neighboring dots. many measures of the gate quality ar computed at intervals a recently derived spin master equation incorporating decoherence caused by a archetypal magnetic atmosphere. Dot-array experiments that might give Associate in Nursing initial demonstration of the required nonequilibrium spin dynamics ar planned. [1]

Semiconductor Clusters, Nanocrystals, and Quantum Dots

Current analysis into semiconductor clusters is targeted on the properties of quantum dots-fragments of semiconductor consisting of a whole bunch to several thousands of atoms-with the majority bonding pure mathematics and with surface states eliminated by enclosure during a material that contains a larger band gap. Quantum dots exhibit powerfully size-dependent optical and electrical properties. the flexibility to hitch the dots into advanced assemblies creates several opportunities for scientific discovery. [2]

Infrared Quantum Dots

The author acknowledges the contributions of Ahmed Maria, Ethan Klem, Fred Chang, Gerasimos Konstantatos, Ian Howard, Joe Salfi, Larissa Levina, Paul Cyr, Sam Cauchi, Scott Kuntze, Shiguo Zhang, Sjoerd Hoogland, Steve McDonald, and Vlad Sukhovatkin. analysis given herein was supported by Nortel Networks; the Ontario Centres of Excellence through Materials and producing Ontario, Photonics analysis Ontario, Communications and data Technology Ontario; the Ontario analysis and Development Challenge Fund and also the Ontario Innovation Trust; the Natural Sciences and Engineering analysis Council of Canada through its Discovery Grant program, cooperative analysis and Development program, and Nano Innovation Platform; the Canada Foundation for Innovation; and also the Canada analysis Chairs Programme. [3]

Study on intracellular delivery of liposome encapsulated quantum dots using advanced fluorescence microscopy

Quantum dots progressively gain quality for in vivo applications. However, their delivery and accumulation into cells is difficult and there’s still lack of elaborated info. Thereby, the applying of advanced visible radiation techniques will expand the portfolio of helpful parameters for a a lot of comprehensive analysis. Here, we have a tendency to encapsulated hydrophilic  quantum dots into liposomes for finding out cellular uptake of those alleged lipodots into living cells. First, we have a tendency to investigated photophysical properties of free quantum dots and lipodots perceptive changes within the visible radiation decay time and change of location diffusion behaviour. as compared to empty liposomes, lipodots exhibited AN altered letter of the alphabet potential, whereas their hydraulics size failed to modification. [4]

Studying on Synthesis of Highly Luminescent Quantum Dots Based on Zinc and Their Application for Escherichia coli O157: H7 and Methicillin- Resistant Staphylococcus aureus Detection

The synthesis of extremely light quantum dots ZnSe/ZnS:Mn(5%)/ZnS và ZnSe:Ag(1%) in liquid section was studied. This artificial methodology is for inexperienced chemistry. Silver and metallic element are used as a dopant to extend photoluminescence quantum yields of obtained merchandise. Mercaptopropionic acid (MPA) is employed as a capping agent that could be a comfortable bridge to mix the quantum dots and protein, bacterium via supermolecule or EDC (1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride). escherichia O157: H7 and methicillin-resistant staph aureus (E. coli O157: H7 and MRSA) are leading causes of unwellness and that they are detected via light signals. The results showed that the quantum dot advanced was capable of detective work bacterium at one hundred and one CFU / cubic centimetre for fifteen – half-hour. The specificity of the reaction is 100 percent. optimum protein concentration for detection of bacterium from ten mg to thirty mg. speedy detection of MRSA and E. coli O157: H7 on food and clinical samples are occurring more check. [5]

Reference

[1] Loss, D. and DiVincenzo, D.P., 1998. Quantum computation with quantum dots. Physical Review A, 57(1),  (Web Link)

[2] Alivisatos, A.P., 1996. Semiconductor clusters, nanocrystals, and quantum dots. science, 271(5251),  (Web Link)

[3] H. Sargent, E., 2005. Infrared quantum dots. Advanced Materials, 17(5), (Web Link)

[4] Study on intracellular delivery of liposome encapsulated quantum dots using advanced fluorescence microscopy
Kristina Bruun & Carsten Hille
Scientific Reports volume 9, Article number: 10504 (2019) (Web Link)

[5] Thi Bui, D., Khanh Pham, D., Truong Mai, X., Khiem Nguyen, V., Thao Bui, T., Quyen Tran, N., Thi Ngoc Nhi, N., The Diep, T. and Thi Luong, B. (2018) “Studying on Synthesis of Highly Luminescent Quantum Dots Based on Zinc and Their Application for Escherichia coli O157: H7 and Methicillin- Resistant Staphylococcus aureus Detection”, Advances in Research, 14(4), (Web Link)

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