The device consists of a chitosan hydrogel located between a layer of disordered metallic
The ultra-high speed of the new sensor is achieved due to the porous space between the nanoparticles that make up the device.
Instant and customizable new responseThe hydrogel resonator can subsequently be used not only for colorimetric sensors, but also for anti-counterfeit applications and high-resolution displays.
“This new humidity sensor is unique in thatmakes it possible to scale production at low cost even when using nanomaterials and nanostructures,” explained Professor Ro, who led the study. “The introduction of moisture-sensitive color pixels into security codes allows them to be used as security tags for moisture-sensitive electronic devices, banknotes, passports and ID cards.”
In their development, scientists were inspired by the nature of the Hercules beetle, which lives in South America.The insect has an amazing feature – it changes the color of its shell depending on theThis is due to the fact that the inside of the beetle's shell consists ofMade of a porous lattice structure with square holes.on the shell, it reflects them and displays different colors that change depending on theHumidity.
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