Graphene Foam: Introduction and News - Page 5

Researchers from Rensselaer Polytechnic Institute have discovered that graphene foam can outperform leading commercial gas sensors in detecting potentially dangerous and explosive chemicals. The foam is made from several graphene sheets (grown on Nickel, which was later removed) and is flexible, rugged and retains graphene's important properties.

The new sensor successfully and repeatedly measured ammonia (NH3) and nitrogen dioxide (NO2) at concentrations as small as 20 parts-per-million. The graphene foam sensor is about the size of a postage stamp and the thickness of felt. Here's a video discussing the production method of the graphene foam:

Researchers from the Chinese Academy of Sciences' Institute of Metal Research developed a way to turn graphene into porous three-dimensional 'foam' using chemical vapor deposition (CVD). This 'foam' has extremely high conductivity and when permeated with a siloxane-based polymer it results in a composite that can be twisted, stretched and bent without harming its electrical or mechanical properties.

This foam has a unique network structure, large surface area, very low density and outstanding electrical and mechanical properties. This can find uses in many fields- flexible electronics, fuel cell electrodes, biomedical supports and more.