The potential of printing 3D metal took another step forward this month with the release of information from North Carolina State University, in which they claim they can produce free-standing metal structures from droplets of liquid metal at room temperature.
By using an alloy of gallium and indium whose surface reacts with oxygen at room temperature to form a skin, they are able to produce 3D structures which retain their shape. The beads can be patterned in plane quite easily, but they can also stacked on top of each other much like 'oranges in a supermarket'.
The original article can be found here and the link to the official paper can be found here.
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