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Flow-assisted Dielectrophoresis: A Low Cost Method for the Fabrication of High Performance Solution-processable Nanowire Devices
Published on: December 7, 2017
Precise semiconductor nanowire placement through dielectrophoresis
Sourobh Raychaudhuri1, Shadi A Dayeh, Deli Wang
1Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, USA.
Nano Letters
|May 8, 2009
Summary
We precisely controlled the alignment and placement of indium arsenide (InAs) nanowires using dielectrophoresis on narrow electrodes. This method is key for assembling complex nanowire systems, with 10 MHz signals proving effective for alignment.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Precise assembly of nanomaterials is crucial for advanced electronic devices.
- Dielectrophoresis offers a potential method for controlled nanowire manipulation.
- Challenges remain in achieving high-yield, ordered assembly of nanowires from solution.
Purpose of the Study:
- To demonstrate precise control over the alignment and placement of indium arsenide (InAs) nanowires.
- To investigate the dielectrophoretic behavior of nanowires on narrow, prepatterned electrodes.
- To identify optimal conditions for nanowire assembly using dielectrophoresis.
Main Methods:
- Utilized dielectrophoresis for manipulating InAs nanowires suspended in solution.
- Employed narrow, prepatterned electrodes to guide nanowire assembly.
- Varied signal frequency and electrode geometry to study their influence on nanowire placement.
- Analyzed nanowire alignment percentages based on experimental parameters.
Main Results:
- Achieved precise control over the alignment and placement of numerous InAs nanowires.
- Identified optimal signal frequencies around 10 MHz for high-percentage nanowire alignment.
- Demonstrated that electrode dimensions similar to nanowire dimensions enhance alignment.
- Examined the impact of electrode design and signal frequency on manipulation efficiency.
Conclusions:
- Dielectrophoresis is a viable technique for the directed assembly of InAs nanowires.
- Specific signal frequencies and electrode designs are critical for successful nanowire alignment.
- The findings provide a foundation for developing intricate nanowire-based systems and devices.
