Energy & Green Tech
Gisele Azimi is bringing battery recycling to a new level, using captured carbon dioxide to harvest the precious metals used for green technologies. Azimi, a University of Toronto professor and the Canada Research Chair for ...
Jul 6, 2023
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23
Computer Sciences
Fluorescence microscopy is a widely used technique in the life sciences that enables scientists to see specific parts of cells and tissues by labeling them with glowing molecules, helping in the study of cell structure and ...
Feb 16, 2023
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36
Energy & Green Tech
There's always room for another bright idea when it comes to safely storing the colossal amounts of electronic information we produce every day.
Jul 29, 2021
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15
Machine learning & AI
Ever since the world's first ever microscope was invented in 1590 by Hans and Zacharias Janssen—a Dutch father and son—our curiosity for what goes on at the tiniest scales has led to development of increasingly powerful ...
Jun 8, 2021
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11
Engineering
Greenhouses can allow the growth of high quality crops in otherwise unproductive areas. Important, as the world population is growing and the land area appropriate for farming is limited. One thing that is still difficult ...
Apr 8, 2021
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6
Energy & Green Tech
Monitoring the health of flow batteries in real time is a challenge. Argonne researchers have designed a fluorescent molecule for the purpose.
Feb 3, 2021
1
51
Engineering
Try whispering at one end of the Echo Wall in the Temple of Heaven in Beijing. People at the far end of the curved wall will hear you from 65 meters away. This is the whispering-gallery effect. Now, researchers from Japan ...
May 26, 2020
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6
Engineering
A dumbbell-shaped nanoparticle powered just by the force and torque of light has become the world's fastest-spinning object.
Jan 16, 2020
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8400
Engineering
People can be good at hiding strain, and we're not alone. Solar cells have the same talent. For a solar cell, physical strain within its microscopic crystalline structure can interrupt its core function—converting sunlight ...
Oct 31, 2019
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38
Engineering
Devising the best treatment for a patient with cancer requires doctors to know something about the traits of the cancer from which the patient is suffering. But one of the greatest difficulties in treating cancer is that ...
Apr 2, 2019
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74
Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation of a different wavelength. It is a form of luminescence. In most cases, emitted light has a longer wavelength, and therefore lower energy, than the absorbed radiation. However, when the absorbed electromagnetic radiation is intense, it is possible for one electron to absorb two photons; this two-photon absorption can lead to emission of radiation having a shorter wavelength than the absorbed radiation.
The most striking examples of fluorescence occur when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible to the human eye, and the emitted light is in the visible region.
Fluorescence has many practical applications, including mineralogy, gemology, chemical sensors (fluorescence spectroscopy), fluorescent labelling, dyes, biological detectors, and, most commonly, fluorescent lamps.
This text uses material from Wikipedia, licensed under CC BY-SA
