Chemical Reactions Spark Life Into Self-Folding Micro Origami Machines — Cornell researchers have d |
A Cornell-led collaboration harnessed chemical reactions to make microscale origami machines self-fold – freeing them from the liquids in which they usually function, so they can operate in dry environments and at room temperature.
The project was led by senior author Nicholas Abbott, a Tisch University Professor in the Robert F. Smith School of Chemical and Biomolecular Engineering in Cornell Engineering, along with Itai Cohen, professor of physics, and Paul McEuen, the John A. Newman Professor of Physical Science, both in the College of Arts and Sciences; and David Muller, the Samuel B. Eckert Professor of Engineering in Cornell Engineering.
However, Abbott’s group found a loophole of sorts while reviewing data from a catalysis experiment: a small section of the chemical reaction pathway contained both slow and fast steps. The group also collaborated with theorists, led by professor Manos Mavrikakis at the University of Wisconsin, Madison, who used electronic structure calculations to dissect the chemical reaction that occurs when hydrogen – adsorbed to the material – is exposed to oxygen.
“The result is quite generalizable,” Abbott said. “There are a lot of catalytic reactions which have been developed based on all sorts of. So carbon monoxide, nitrogen oxides, ammonia: they’re all candidates to use as fuels for chemically driven actuators.” Reference: “Gas-phase microactuation using kinetically controlled surface states of ultrathin catalytic sheets” by Nanqi Bao, Qingkun Liu, Michael F. Reynolds, Marc Figueras, Evangelos Smith, Wei Wang, Michael C. Cao, David A. Muller, Manos Mavrikakis, Itai Cohen, Paul L. McEuen and Nicholas L. Abbott, 1 May 2023,Co-authors include postdoctoral researcher Michael Reynolds, M.S. ‘17, Ph.D. ‘21; doctoral student Wei Wang; Michael Cao ’14; and researchers at the University of Wisconsin, Madison.
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