Scientists are racing nanocars on a solid gold track



Scientists are set to engage in a
frivolous race of single-molecule “nanocars”
on, if you can
believe it, a solid gold track. It’s the boldest show of
academic elitism and greatest waste of taxpayer dollars since
the duck penis thing. Oh wait, it’s actually the greatest
thing of all time.

The whole thing is a bit of a
lark
, thought up by chemists Christian Joachim and Gwénaël
Rapenne as a way to drum up interest in the more prosaic
aspects of nanotechnology, if you can really call them that.

Each “car” is a single molecule of perhaps a few dozen atoms,
arranged in such a way that the electrons fired from the tip of
a scanning tunneling microscope will propel them forward. This
is accomplished in different ways by different nanocars: one
might enter a higher energy state by absorbing the electron and
deform, scooting it down the track. Another might be stable
enough to repel the electron and be in turn propelled by it.
(No pushing your car with the tip itself, that’s cheating.)

Some superficially resemble cars, but no one’s sure if wheels
work the same at that scale, and there sure aren’t any engines
— although the basic idea of a chassis with axles seems to
apply.

This is how one car would go, ideally, but no one is really
sure.

The track is a 100-nanometer-long piece of polished pure gold,
so chosen because it is highly nonreactive, allowing all kinds
of elements and configurations in the contestants’ molecules.
It will be kept in a vacuum and as close to absolute zero as
they can get it, since individual molecules tend to blow around
a bit under ordinary circumstances.

There are two turns, which makes the course rather advanced
considering these things have never even gone in a straight
line before.

Some of the nanocar designs aiming to qualify.

This madness will all take place at the University of Toulouse,
which has a four-headed STM, each head of which can drive one
nanocar. So right now they’re running qualifiers to see which
of six proposed designs from a variety of institutions will
make it to the starting line.

No one really knows what will happen after that. The cars might
disappear, break up, or go the wrong way. Japanese racer
hopeful Waka Nakanishi admitted part of the reason she’s
participating is to get her molecule under the university’s
high-quality STM and find out what it’ll do. Sure, why not?

Every zap provided by the STM will be followed by a scan of the
track, and every hour these scans will be uploaded as an
animation, allowing fans to follow along in about as real time
as you can expect from this ridiculous endeavor.

Curious? I knew you’d be. You can learn more at the project’s
website
or, if you speak French, in the video above.
There’s even a BD!


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Scientists are racing nanocars on a solid gold track

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