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Atomically Traceable Nanostructure Fabrication

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Published on: July 17, 2015

Self-Assembled Periodic Nanostructures Using Martensitic Phase Transformations.

Abhinav Prakash¹, Tianqi Wang¹, Ashley Bucsek^2,3

¹Department of Chemical Engineering and Materials Science, University of Minnesota, Twin Cities, Minneapolis, Minnesota 55455, United States.

|December 2, 2020

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Researchers developed a new method for creating self-assembled nanostructures using martensitic phase transformations. This technique allows for tunable, reconfigurable periodic nanostructures in strontium tin oxide (SrSnO3) thin films for optoelectronic applications.

Area of Science:

Materials Science
Nanotechnology
Condensed Matter Physics

Background:

Periodic nanostructures are crucial for advanced optoelectronic devices.
Existing fabrication methods often lack scalability and tunability.

Purpose of the Study:

To present a novel approach for designing and synthesizing self-assembled periodic nanostructures.
To demonstrate the use of martensitic phase transformations for creating reconfigurable nanostructures.

Main Methods:

Utilized martensitic phase transformations in perovskite SrSnO3 thin films.
Employed chemical doping and strain engineering to control periodicity and phase fractions.
Tuned dielectric contrast using temperature and laser wavelength.

Keywords:

Phase transformation metamaterials molecular beam epitaxy nanostructure self-assembly semiconductor

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Main Results:

Successfully created reconfigurable periodic nanostructures with sharply contrasted dielectric properties.
Achieved tunable periodicity and relative phase fractions.
Demonstrated the potential for creating variable photonic crystals.

Conclusions:

Martensitic phase transformations offer a viable route for large-area, self-assembled periodic nanostructures.
This approach enables the design of "built-to-order" nanostructures for tailored optoelectronic functionalities.