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Quantum dots are like a tattoo that can store information, like if you got a vaccine or not. Then it can be used to determine if you can buy goods or not. Quantum dots can also send chemicals to very specific parts of the brain, or types of tumors. This link looks like an intro to quantum dots. https://wordsalad.info/2020/07/quantum-dots-in-medicine/

If you're watching the complex processes in a living cell, it is easy to miss something important—especially if you are watching changes that take a long time to unfold and require high-spatial-resolution imaging. But new research* makes it possible to scrutinize activities that occur over hours or even days inside cells, potentially solving many of the mysteries associated with molecular-scale events occurring in these tiny living things. A joint research team, working at the National Institute of Standards and Technology (NIST) and the National Institute of Allergy and Infectious Diseases (NIAID), has discovered a method of using nanoparticles to illuminate...

The main light source of the future will almost surely not be a bulb. It might be a table, a wall, or even a fork. An accidental discovery announced this week has taken LED lighting to a new level, suggesting it could soon offer a cheaper, longer-lasting alternative to the traditional light bulb. The miniature breakthrough adds to a growing trend that is likely to eventually make Thomas Edison's bright invention obsolete. LEDs are already used in traffic lights, flashlights, and architectural lighting. They are flexible and operate less expensively than traditional lighting. Happy accident Michael Bowers, a graduate student...