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By controlling exciton flows, scientists can build more efficient electronics

By controlling exciton flows, scientists can build more efficient electronics

Science
Jan. 4 (UPI) -- Scientists have found a way to control exciton flows at room temperature, paving the way for the development of faster, more efficient electronics. When an electron absorbs light, it gets bumped into a higher energy band. As quantum physics reveals, the newly energized electron leaves an "electron hole" behind. Because the high-energy electron has a negative charge and the hole has positive charge, the duo remain bound -- forming an exciton. Excitons are only found in semiconducting and insulating materials, and their unique properties can be studied in 2D materials. Physicists regularly look for new quantum properties by combing 2D materials. Recently, researchers in Switzerland layered tungsten diselenide with molybdenum diselenide, WSe2 with MoSe2, to create a new 2D me...
Method devised for wirelessly powering, controlling devices inside body

Method devised for wirelessly powering, controlling devices inside body

Health
June 4 (UPI) -- A prototype device about the size of a grain of rice -- that can receive power and communicate wirelessly from inside the body -- for drug delivery, disease treatment or just health monitoring has been developed by researchers. MIT researchers and scientists from Brigham and Women's Hospital in Boston have developed the tiny implants -- they expect they can be made even smaller than a grain of rice -- that are powered by radio frequency waves and can safely pass through human tissues. The research on development of the devices will be presented at the Association for Computing Machinery Special Interest Group on Data Communication conference Aug. 20-25 in Budapest, Hungary. "Even though these tiny implantable devices have no batteries, we can now communicate with them fro...