Researchers from Iowa State University and Ames Laboratories have created a new technology that can print metal contacts on almost anything without heating, eliminating the need to heat metal wires, meaning that it can be very delicate Printing on the surface.
To prove how the printing process (called supercooled metal technology) works, the researchers printed metal wires on the surface of the gelatin cylinder and directly on the rose petals. The technology uses liquid metal, which is an alloy of bismuth, indium and tin, trapped in a polished oxide shell below its melting point. The diameter of the particles produced by this process is about 10 millionths of a meter.
When mechanical pressure or chemical dissolution is used to destroy the casing, the metal inside flows out and solidifies. This produces heatless soldering for printing conductive metal wires and metal traces on various materials. The team says it can be printed anywhere from concrete to leaves.
The team believes that the printing process has many practical applications. This technology can be used to make sensors to measure the structural integrity of buildings, or to make sensors to measure crop growth. The team tested the technology in a paper remote control. This example changes the current when the paper is bent. Engineers also tested the technology, making electrical contacts for solar cells, and printing wires on gelatin, which was used to make models of soft biological tissues, including the brain.
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