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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
Published on: June 18, 2013
Free-standing ferroelectric nanotubes processed via soft-template infiltration.
Ashley Bernal1, Alexander Tselev, Sergei Kalinin
1GW Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
Advanced Materials (Deerfield Beach, Fla.)
|January 27, 2012
Summary
A novel nano-manufacturing technique creates high-quality ferroelectric nanostructures using polymeric templates. This study reveals unique piezoelectric size effects in ferroelectric nanotubes for the first time.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Ferroelectric materials like lead zirconate titanate (PbZr0.52Ti0.48O3) are crucial for electronic devices.
- Fabricating high-quality ferroelectric nanostructures presents significant challenges.
- Understanding size-dependent properties is essential for nanoscale applications.
Purpose of the Study:
- To introduce a new nano-manufacturing method for high aspect-ratio ferroelectric nanostructures.
- To characterize the ferroelectric properties of the fabricated nanostructures.
- To investigate and report piezoelectric size effects in ferroelectric nanotubes.
Main Methods:
- Utilized polymeric templates for directed self-assembly.
- Employed band-excitation Piezoresponse Force Microscopy (PFM) for characterization.
- Fabricated lead zirconate titanate (PbZr0.52Ti0.48O3) nanotubes.
- Compared nanotube response to thin film behavior.
Main Results:
- Successfully manufactured high aspect-ratio ferroelectric nanostructures.
- Band-excitation PFM confirmed the high quality and ferroelectric response.
- Observed and reported piezoelectric size effects in nanotubes for the first time.
- Determined a critical thickness of approximately 15 nm for the observed effects.
Conclusions:
- The new nano-manufacturing method is effective for producing high-quality ferroelectric nanostructures.
- Ferroelectric nanotubes exhibit unique size-dependent piezoelectric properties.
- The findings offer insights into scaling down ferroelectric devices and understanding nanoscale phenomena.
