LEDs Light the Way to Coronavirus Disinfection

LEDs are commonly used for sterilization, and in the continued effort to combat the coronavirus pandemic, LEDs can also help inactivate SARS-CoV-2. A team in Pakistan designed far-ultraviolet LEDs at a targeted wavelength of 222 nanometers, chosen both for its ability to inactivate the virus and for being safe on human skin. They based their design on the material aluminum gallium nitride, part of a set of materials called III-nitrides which are efficient, inexpensive, and environmentally friendly.

Harmful Microbes Found on Sewer Pipe Walls

Can antibiotic-resistant bacteria escape from sewers into waterways and cause a disease outbreak? A new Rutgers study, published in the journal Environmental Science: Water Research & Technology, examined the microbe-laden “biofilms” that cling to sewer walls, and even built a simulated sewer to study the germs that survive within.