Researchers at NC State Develop Liquid Metal 3D Printing Technology

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News Posted: Wed, Jul 10 2013 3:18 PM
It appears as though researchers at NC State have taken 3D printing a whole new level. A team has developed a way to print free-standing 3D structures out of liquid metal--at room temperature.

“It’s difficult to create structures out of liquids, because liquids want to bead up,” said Dr. Michael Dickey, co-author of a paper describing the technology and process. “But we’ve found that a liquid metal alloy of gallium and indium reacts to the oxygen in the air at room temperature to form a ‘skin’ that allows the liquid metal structures to retain their shapes.”

3D printing with liquid metal

Here’s a video showing the 3D printing process in action. (We think the bit where they print antennae on a bug is the best part. Especially if you think they look more like antlers than antennae.)



A syringe needle doles out the material in droplets, which forms an oxide “skin” that stabilizes the structures being formed. Alternately, the syringe can produce a steady stream of material that forms a wire; with these two methods, researchers were also able to connect droplets with wires. A third method consists of injecting the liquid metal into a template, and then dissolving the template and leaving the metal shape intact.

3D printing with liquid metal, connecting two LEDs
Connecting two LEDs

The material is stretchable, and it conducts electricity; you can see in the video that it’s used to connect two LEDs, although the printing process is sped up in the video by 40-50x.
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Wow that is crazy. Sure would be fun to see this working in person.

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DavidSmith replied on Thu, Jul 11 2013 10:17 PM

Interesting so far. Now to find other metals that would be more durable and stronger.

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im pretty intrested to see where this discovery may lead us, maybe we can play with some mercury now n make something amazing.......

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i think it is interesting but useless at the same time

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I thought skynet came before the liquid metal...

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Read something similar a few weeks back..cool stuff.

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Wow! Congrats! Now it remains to develop a nano-nozzle and then the trick is done.

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