Full carbon-based humidity sensor by handwriting electrodes and the sensitive materials on paper substrates. (© ACS) (click on image to enlarge) The researchers used a commercial pencil to fabricate ...

The Hercules beetle native to South America has a fascinating trait of changing its shell colors depending on the external humidity conditions. This is because the inside of the beetle’s shell ...

(A) Optical image of the rGO electrode. (B and C) The SEM and EDS observations of the rGO electrode. (D) An optical axis view of the corresponding light intensity distribution of the Bessel beam.

There’s a huge variety of ways that we can potentially generate all the power we need for tiny medical sensors or other devices with minimal power needs. But there’s often a big gap between those ...