JUN 02, 2020 11:00 AM PDT

How Can Far-Ultraviolet Light Help Us in a Pandemic?

WRITTEN BY: Daniel Duan

(Wikimedia Common)

Ultraviolet (UV) (10-400 nm) light is everywhere. It constitutes 10 percent of the total electromagnetic radiation in the sunlight. There are three bands of UV we encounter on earth, UVA (315–400 nm), UVB (280–315 nm), and UVC (200-280 nm). 

Because of its energetic nature, UVC radiation is mostly absorbed by the ozone layer before it reaches the ground. But that did not stop it from being an important disinfecting agent. Lamps manufactured for ultraviolet germicidal irradiation (UVGI) purpose help keep our air, food, and water supply safe from bacteria.

According to Charlie Ironside, an Australian physicist and optoelectronics researcher, light-emitting diodes (called far-UVC LED) that emit in a specific UVC band can help us during pandemics.

Unlike germicidal lamps, which emit around 250 nm wavelength and can cause burns, and even cancer, far-UVC light causes no skin damage. Radiation at these wavelengths can barely penetrate the outermost layer of our skins. But it's still highly lethal for bacteria and viruses, for they are much thinner as compared to the dead skin cells.

In 2017, a group of researchers at Columbia University conducted a study to investigate the safety and effectiveness of UVC as a sterilization method. They exposed mice with an excimer lamp emitting 222 nm UVC. They observed no skin damage on the rodents, a result similar to their previous study performed with 207 nm UVC. On the other hand, radiation at both wavelengths showed uncompromised effectiveness at killing an antibody-resistant super-bateria Staphylococcus aureus (MRSA). A year later, the same team extended their research using more target microbes. They found that the 222 nm UVC was also potent against airborne viruses such as H1N1 influenza, the culprit behind the swine flu pandemic back in 2009. 

Building on the promising evidence from literature, Ironside and many physicists are advocating for more research to be conducted on far-UVC emitting LEDs. Once fully developed and incorporated into handheld devices like our cellphones, the human-safe, bug-killing UV radiation could make a big difference to combat infectious bateria and viruses. 

How Ultraviolet Light Could Help Stop The Spread Of Coronavirus (CNBC)

Source: Physics World

About the Author
  • Graduated with a bachelor degree in Pharmaceutical Science and a master degree in neuropharmacology, Daniel is a radiopharmaceutical and radiobiology expert based in Ottawa, Canada. With years of experience in biomedical R&D, Daniel is very into writing. He is constantly fascinated by what's happening in the world of science. He hopes to capture the public's interest and promote scientific literacy with his trending news articles. The recurring topics in his Chemistry & Physics trending news section include alternative energy, material science, theoretical physics, medical imaging, and green chemistry.
You May Also Like
SEP 08, 2020
Chemistry & Physics
Green supercapacitor charges faster than you can imagine
SEP 08, 2020
Green supercapacitor charges faster than you can imagine
Research published in the journal Energy Storage reports on the development of a supercapacitor that is literally p ...
OCT 02, 2020
Chemistry & Physics
A New Way of Building Houses: 3-D Printing with Clay
OCT 02, 2020
A New Way of Building Houses: 3-D Printing with Clay
Our ancestors had a long history of building dwelling structures using clay and plant-based fibrous materials. Even thes ...
OCT 11, 2020
Chemistry & Physics
The mysteries of tiny surfing robots revealed
OCT 11, 2020
The mysteries of tiny surfing robots revealed
Mechanical engineers from Michigan Technological University have implemented the laws of surface tension and propulsion ...
OCT 23, 2020
Chemistry & Physics
The Ever-Evolving Battle to Fight Corrosion in Nuclear Reactors
OCT 23, 2020
The Ever-Evolving Battle to Fight Corrosion in Nuclear Reactors
Since its birth in the early 20th century, atomic research has brought mostly positive impacts to our lives. This week i ...
OCT 30, 2020
Chemistry & Physics
Superconductivity at Room Temperature - Have Scientists Finally Achieved the Impossible?
OCT 30, 2020
Superconductivity at Room Temperature - Have Scientists Finally Achieved the Impossible?
First discovered by Dutch physicist Heike Onnes in the early 20th century, superconductivity is a rare phenomenon observ ...
NOV 13, 2020
Chemistry & Physics
Mid-IR Spectroscopy a Convenient, Accurate Means of Cancer Diagnosis
NOV 13, 2020
Mid-IR Spectroscopy a Convenient, Accurate Means of Cancer Diagnosis
Last Sunday, November 8, was the International Day of Radiology (IDoR 2020), an event celebrated by radiologists, techno ...
Loading Comments...