Hello friends this is my new post related to protection from uv rays...
Chinese researchers have created a special glass that can help protect
living cells by absorbing and blocking damaging ultraviolet rays.
Out
in space, where the level of ultraviolet (UV) radiation from the sun can
be even higher, it can damage sensitive electronics aboard in-flight
spacecraft.
In this
study published in the journal Optical
Materials Express, the team demonstrated that the new glass effectively
protects living cells and organic dyes, and believe it could also be
developed as a transparent shield to protect electronics in space.
"Our
glass shows excellent optical quality, and it can be easily fabricated
either in bulk form or as a film," said one of the researchers Shifeng
Zhou from South China University of Technology, Guangzhou, China.
"It effectively protects organic dye and living cells from UV radiation damage," Zhou noted.
The
researchers used a metal oxide - cerium (IV) oxide (CeO2) - well-known
for its ability to absorb UV photons to craft the composite glass-based
UV absorber.
Other key features of the final composite material
are the optical transparency of the glass and the material's ability to
suppress the separation of photo-generated electrons and holes.
The
later feature slows down a light-induced reaction that would lead to
the ultimate breakdown of the material under prolonged exposure to UV
radiation.
The method the team developed is based on a process called self-limited nanocrystallisation of glass.
"This work establishes an effective approach for the functionalization of glass," Zhou said.
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"And it allowed us to demonstrate the construction of a novel glass-based UV absorber," Zhou pointed out.
