Newly-Developed Portable Device Can Rapidly Detect Bad Breath

An international team of researchers from Korea and the United States has constructed a tiny portable device that directly detects hydrogen sulfide (H2S) in human breath.

Continuous monitoring of hydrogen sulfide in human breath for early stage diagnosis of halitosis is of great significance for prevention of dental diseases. Image credit: Shin et al., doi: 10.1021/acsnano.1c01350.

No one wants bad breath — not when visiting friends and family, at a job interview, and especially not on a first date.

Smelly breath can make things awkward, but it also is a natural warning sign, indicating that serious dental issues are occurring.

Some devices measure small amounts of stinky hydrogen sulfide, but they require exhaled air to be collected and tested on expensive instruments in a lab, which is not feasible for consumers.

Previous studies have shown that when some metal oxides react with sulfur-containing gases, their electrical conductivity changes.

And when metal oxides are paired with noble metal catalysts, they can become more sensitive and selective.

To develop a small, real-time analyzer, Dr. Il-Doo Kim from the Korea Advanced Institute of Science and Technology, Dr. Kak Namkoong from the Samsung Advanced Institute of Technology and their colleagues wanted to find the right combination of substances that would elicit the fastest and strongest response to hydrogen sulfide in air blown directly onto it.

They mixed sodium chloride and platinum nanoparticles with tungsten, and electrospun the solution into nanofibers that they heated, converting the tungsten into its metal oxide form.

In preliminary tests, the composite made from equal parts of each metal had the largest reactivity to hydrogen

Read More

News Bot

Share
Published by
News Bot

Recent Posts

Perceptual distortions in late-teens predict psychotic symptoms in mid-life

Schizophrenia is often diagnosed well into adulthood, typically from the late teens to early 40s.…

22 mins ago

Maker’s Schedule, Manager’s Schedule (2009)

July 2009One reason programmers dislike meetings so much is that they're on a different type…

22 mins ago

Climate tipping points are now imminent, scientists warn

Around 13,000 researchers have called for urgent action to slow down the climate emergency as…

22 mins ago

Court orders US Capitol rioter to unlock his laptop ‘with his face’

A federal judge in Washington, D.C., has ordered a man accused of participating in the…

22 mins ago

Show HN: A web-based matrix client: Cinny

Cinny is a web-based matrix client focusing primarily on simple, elegant and secure interface. The…

22 mins ago

Six content ideas to supercharge your marketing in 2021

30-second summary: Keyword research is at the heart of understanding where your business stands and…

22 mins ago