UC Berkeley July 6, 2018
An international team of researchers (USA – UC Berkeley, Redstone Arsenal, China) has developed a direct‐write laser‐patterning technology to engrave random shapes of metal‐carbide–graphene composites (MCG) on different types of paper (A4, wiper, filter paper, etc.). These commercial papers are soaked with solutions containing metal ions in gelatin media, which is the major component of the “jelly”. The MCG–paper substrates are applied in a 3D foldable energy generator, electrochemical sensors, and supercapacitors. They see many potential applications for the new, disposable paper electronics, circuitry to detect heavy metal contamination could be “written” on paper to economically monitor toxins…read more. TECHNICAL ARTICLE
Berkeley engineers used a laser to “write” the circuitry for an electronic switch onto paper. They showed that folding and unfolding the paper could turn the circuit on and off. (Image by Xining Zang)