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KAWANISHI-CITY, Japan, March 9, 2021 /PRNewswire/ Quantum dots are extremely small fluorescent nanoparticles typically between several hundred to several thousand of atoms or molecules, and 1 to 9 nanometers in diameter. They are also referred to as artificial atom molecules. Quantum dots have the concept of energy level, bandgap, conduction band, valence band which are the same as for normal bulk size material. However, because of its quantum confinement effect caused by their extremely small size, energy level of quantum dots become discontinuous and separated. This means that one can control the color of light given off by a quantum dot solely by changing its size and chemical composition, and light can be converted into nearly any desired color in the spectrum ranging from the UV to the IR region.
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Quantum dots generally refer to specially fabricated nanocrystals that exhibit unique electrical and optical properties due to their inherent quantum properties. However, conventional technology has limited quantum dots to toxic and costly metals as raw materials.
A new study has found a cheaper, safer alternative material that could be further purified to replace toxic metal quantum dots with the same efficiency in various applications.
While there have been prior studies on finding non-toxic and more cost-effective alternatives, these proposed quantum dots emit less light when exposed to ultraviolet (UV) light. In the new study, titled Ultrafast nanometric imaging of energy flow within and between single carbon dots and published in the National Academy of Sciences latest Proceedings, researchers detail how ultrafast nanometric imaging has revealed clusters of good and bad emitters in entire populations of carbon dots. Researchers suggest that by selecting only the good
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Researchers from Cleveland Clinic's Global Center for Pathogen Research & Human Health, who have developed the nanotechnology based vaccine, say it has shown strong efficacy in preclinical disease models.
https://www.afinalwarning.com/500980.html (Natural News) Researchers have discovered a new kind of active matter that bends the laws of physics. Dubbed “swirlon,” the new matter behaves similarly to how fishes swim in schools and birds fly in murmurations.
The laws of physics apply to passive, nonliving matter, ranging from planets all the way down to the smallest atoms. But according to Nikolai Brilliantov, a mathematician at England’s
Skolkovo Institute of Science and Technology, much of the matter in the world is active matter. Living things such bacteria, fish and humans can interact with the forces upon them.