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

IR35 reforms: TUC demand for government ban on umbrella companies raises eyebrows

The Trades Union Congress has raised eyebrows within the contracting community by calling for a…

2 mins ago

Five tips to ensure your crisis comms plan is ready for a cyber attack

Business leaders take note: standard crisis communications plans are inadequate if you have fallen victim…

2 mins ago

Gigabit broadband funding targets over two million homes and businesses

Digital infrastructure upgrades planned for rural and hard-to-reach areas to support post-pandemic economic growth and…

2 mins ago

Beep-Beep: Bandai Namco is launching a Star Wars R2-D2 Tamagotchi

All the sessions from Transform 2021 are available on-demand now. Watch now. Bandai America unveiled…

2 mins ago

Pinecone CEO on bringing vector similarity search to dev teams

All the sessions from Transform 2021 are available on-demand now. Watch now. The traditional way…

2 mins ago

Take-Two boss: ‘Development cycles are not getting shorter’

All the sessions from Transform 2021 are available on-demand now. Watch now. Do not expect…

2 mins ago