Portable, thumb-sized device quickly detects bad breath

portable thumb sized device quickly detects bad breath

Sumary of Portable, thumb-sized device quickly detects bad breath:

  • Now, researchers reporting in ACS Nano have constructed a portable, thumb-sized device that diagnoses bad breath by quickly “sniffing” exhalations for the gas that makes it stinky — hydrogen sulfide.
  • Related StoriesThe researchers mixed sodium chloride (an alkali metal salt) and platinum (a noble metal catalyst) nanoparticles with tungsten, and electrospun the solution into nanofibers that they heated, converting the tungsten into its metal oxide form.
  • Finally, the team coated interdigitated gold electrodes with the nanofibers and combined the gas sensor with humidity, temperature and pressure sensors into a small prototype device that was about the size of a human thumb.

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