Researchers create molecule that can pave way for mini-transistors


Date:
February 15, 2022
Source:
Lund University
Summary:
Researchers have succeeded in developing a simple hydrocarbon
molecule with a logic gate function, similar to that in transistors,
in a single molecule. The discovery could make electric components
on a molecular scale possible in the future.



FULL STORY ========================================================================== Researchers at Lund University in Sweden have succeeded in developing a
simple hydrocarbon molecule with a logic gate function, similar to that
in transistors, in a single molecule. The discovery could make electric components on a molecular scale possible in the future. The results are published in Nature Communications.


========================================================================== Manufacturing very small components is an important challenge in both
research and development. One example is transistors -- the smaller they
are, the faster and more energy efficient our computers become. But is
there a limit to how small logic gates can become? And is it possible
to create electric machines on a molecular scale? Yes, perhaps, is the
answer from a chemistry research team at Lund University.

"We have developed a simple hydrocarbon molecule that changes its form,
and at the same time goes from insulating to conductive, when exposed
to electric potential. The successful formula was to design a so-called anti-aromatic ring in a molecule so that it becomes more robust and
can both receive and relay electrons," says Daniel Strand, chemistry
researcher at Lund University.

Many organic molecules consist of aromatic benzene rings, ie flat rings
made up of six carbon atoms. A simple example is graphene. However, such molecules do not change properties or shape if subjected to electric
potential. Therefore, the research group chose to look at hydrocarbons
made up of rings with eight carbon atoms. These are anti-aromatic and
bent into a tub-shape. If two electrons are injected into such a molecule,
it flattens and goes from insulating to conducting -- a function similar
to that of a transistor switching from 0 to 1.

"A unique aspect of the molecules is that they are so simple. They only
consist only of carbon and hydrogen atoms which makes them easier to
produce synthetically," says Daniel Strand.

The discovery means researchers can now think about how to develop both electrical switches and new mechanical systems at the single-molecule
level using anti-aromatic hydrocarbons.

"Molecules that change form in response to electric potential lead
to exciting possibilities. One can imagine energy-efficient computer architectures and in the future perhaps electric machines on a molecular scale," concludes Daniel Strand.

========================================================================== Story Source: Materials provided by Lund_University. Note: Content may
be edited for style and length.


========================================================================== Journal Reference:
1. Magdalena Tasić, Jakov Ivković, Go"ran Carlstro"m,
Michaela
Melcher, Paolo Bollella, Jesper Bendix, Lo Gorton, Petter Persson,
Jens Uhlig, Daniel Strand. Electro-mechanically switchable
hydrocarbons based on [8]annulenes. Nature Communications, 2022;
13 (1) DOI: 10.1038/s41467- 022-28384-8 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2022/02/220215095506.htm

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