Here I have linked a video of one of the latest feats our generation
has opened up to the world of 3d printing. Printing liquid metal, developed by
a team at North Carolina University, they have found a way to oxidize the surface of a small bead of liquid metal to stabilize it enough so that it can
remain in liquid form to create malleable liquid metal structures. We are very used to heating polymer materials
that quickly cool into non-malleable structures when taken away from its heat
source. Here we have a material that
stays liquid in room temperature allowing further manipulation which can lead
to huge leaps and bounds for the technology field when it comes to computer
parts, wires, connectors, electrodes, etc.
Anyone who has worked with metal
knows that metal, to become liquid, needs intense heat typically from a torch,
and it does not stay liquid when that heat source is removed. It cools far too quickly, but this technique
finds a way around that reality. From what I understand the metal they have chosen to work
with is gallium. It is a very soft metal
that does not appear in nature.
Gallium
has a very low melting point, just above room temperature. It has been reported that if the element is
held long enough it will melt in your hand.
I know it seems less impressive using such a soft malleable metal for
this technique, but the metal does have the conductivity needed for electronics
and it could lead to new ways of printing with precious metals down the
road. I look forward to where this will
lead printing with metals since we typically tend to focus on printing with
polymers.