Liquid Metal Printer Lays Electronic Circuits on Paper, Plastic and Even Cotton






Liquid Metal Printer Lays Electronic Circuits on Paper, Plastic and Even Cotton


November 20th, 2013

Via: MIT Technology Review:

Today, Jing Liu and pals at the Technical Institute of Physics and Chemistry in Beijing say they’ve worked out how to print electronic circuits on a wide range of materials using an inkjet printer filled with liquid metal. And they’ve demonstrated the technique on paper, plastic, glass, rubber, cotton cloth and even an ordinary leaf.

The new technique is straightforward. The magic sauce is a liquid metal: an alloy of gallium and indium which is liquid at room temperature. They simply pump it through an inkjet printer to create a fine spray of liquid metal droplets that settle onto the substrate.

The droplets rapidly oxidise as they travel through the air and this oxide forms a surface layer on each drop that prevents further oxidisation. That’s handy because the liquid metal itself does not easily adhere to the substrates. But the metal oxides do and this is the reason, say Jing and co, that the circuits adhere so well to a wide range of surfaces.















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