Molecularly Thin Polyaramid Nanomechanical Resonators
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2601.10633v1.pdf
Description
Accepted version
Size
15.21 MB
Format
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Checksum (MD5)
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Author(s)
Gress, Hagen
Ritt, Cody L
Shomakhov, Inal
Altmisdort, Kaan
Quien, Michelle
Wei, Zitang
Lawall, John R
Boddeti, Narasimha
Strano, Michael S
Bunch, J Scott
Date Issued
December 3, 2025
Journal
Nano Letters
Publisher
American Chemical Society
Citation
Hagen Gress, Cody L. Ritt, Inal Shomakhov, Kaan Altmisdort, Michelle Quien, Zitang Wei, John R. Lawall, Narasimha Boddeti, Michael S. Strano, J. Scott Bunch, and Kamil L. Ekinci
Nano Letters 2025 25 (50), 17301-17307.
Version
Author's final manuscript
Abstract
Two-dimensional polyaramids exhibit strong hydrogen bonding to create molecularly thin nanosheets analogous to graphene. Here, we report the first nanomechanical resonators made out of a two-dimensional polyaramid, 2DPA-1, with thicknesses as small as 8 nm. To fabricate these molecular-scale resonators, we transferred nanofilms of 2DPA-1 onto chips with previously etched arrays of circular microwells. We then characterized the thermal resonances of these resonators under different conditions. When there is no residual gas inside the 2DPA-1-covered microwells, the eigenfrequencies are well-described by a tensioned plate theory, providing the Young's modulus and tension of the 2DPA-1 nanofilms. With gas present, the nanofilms bulge up and mechanical resonances are modified due to the adhesion, bulging and slack present in the system. The fabrication and mechanical characterization of these first 2DPA-1 nanomechanical resonators represent a convincing path toward molecular-scale polymeric NEMS with high mechanical strength, low density, and synthetic processability.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
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Creative Commons Attribution-Noncommercial-ShareAlike
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DOI of Published Version
https://doi.org/10.1021/acs.nanolett.5c04440
