Superplastic nanoscale pore shaping by ion irradiation

Nature Communications
Morteza ArameshKostya Ken Ostrikov

Abstract

Exposed to ionizing radiation, nanomaterials often undergo unusual transformations compared to their bulk form. However, atomic-level mechanisms of such transformations are largely unknown. This work visualizes and quantifies nanopore shrinkage in nanoporous alumina subjected to low-energy ion beams in a helium ion microscope. Mass transport in porous alumina is thus simultaneously induced and imaged with nanoscale precision, thereby relating nanoscale interactions to mesoscopic deformations. The interplay between chemical bonds, disorders, and ionization-induced transformations is analyzed. It is found that irradiation-induced diffusion is responsible for mass transport and that the ionization affects mobility of diffusive entities. The extraordinary room temperature superplasticity of the normally brittle alumina is discovered. These findings enable the effective manipulation of chemical bonds and structural order by nanoscale ion-matter interactions to produce mesoscopic structures with nanometer precision, such as ultra-high density arrays of sub-10-nm pores with or without the accompanying controlled plastic deformations.

References

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Citations

Jul 17, 2019·Nature Nanotechnology·Morteza ArameshJános Vörös
Sep 5, 2020·Nanotechnology·Deying XiaDoug Runt
Jan 10, 2019·Micromachines·Yuehui WangDexi Du
Oct 31, 2018·Biosensors·Marta Maria Pereira da Silva Neves, Daniel Martín-Yerga
Mar 18, 2021·Beilstein Journal of Nanotechnology·Daniel EmmrichArmin Gölzhäuser
Oct 3, 2021·Proceedings of the National Academy of Sciences of the United States of America·Morteza ArameshEnrico Klotzsch

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Methods Mentioned

BETA
transmission electron microscopy
electron diffraction

Software Mentioned

SRIM

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