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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
Published on: June 18, 2013
A generic approach for embedded catalyst-supported vertically aligned nanowire growth.
Hee-Suk Chung1, Yeonwoong Jung, Tyler Jacob Zimmerman
1Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Nano Letters
|March 28, 2008
Summary
Researchers developed a versatile method for growing single-crystalline nanowires on any surface using plasma-sputtered gold-palladium catalysts. This technique ensures mechanical stability and works on complex substrates like indium tin oxide.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Science
Background:
- Vertically aligned nanowires are crucial for advanced electronic and photonic devices.
- Existing methods for nanowire growth often face limitations in material versatility and substrate compatibility.
- Controlled catalyst formation is key to achieving stable, vertically aligned nanostructures.
Purpose of the Study:
- To develop a general and robust approach for growing vertically aligned, single-crystalline nanowires.
- To investigate the role of plasma-sputtered catalysts in enabling nanowire growth on diverse substrates.
- To demonstrate the applicability of the method on complex conductive substrates.
Main Methods:
- Utilizing plasma-sputtered gold-palladium (Au/Pd) thin films as catalysts in the vapor-liquid-solid (VLS) process.
- Employing high-energy sputtered Au/Pd atoms to form a reactive interface with the substrate.
- Embedding catalyst nanoclusters within the substrate for enhanced mechanical stability.
Main Results:
- Successful growth of vertically aligned, single-crystalline nanowires of various materials.
- Demonstrated mechanical stability of the grown nanowires due to embedded catalyst nanoclusters.
- Extended the nanowire growth technique to complex substrates, including indium tin oxide (ITO).
Conclusions:
- The developed approach offers a general solution for fabricating vertically aligned nanowires on arbitrary substrates.
- Plasma-sputtered Au/Pd catalysts provide a stable and effective platform for VLS nanowire growth.
- This method significantly broadens the possibilities for integrating nanowires into diverse electronic and optoelectronic applications.
