Predicting the Results of Chemical Vapor Deposition Growth of Suspended Carbon Nanotubes
| Autor: | J. M. Simmons, Matthew S. Marcus, Sarah E. Baker, Mark A. Eriksson, Robert J. Hamers |
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| Rok vydání: | 2009 |
| Předmět: |
Range (particle radiation)
Nanotube Materials science Mechanical Engineering Bioengineering Nanotechnology General Chemistry Carbon nanotube Chemical vapor deposition Tribology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics law.invention Suspension (chemistry) Condensed Matter::Materials Science Chemical physics law Thermal Trench General Materials Science |
| Zdroj: | Nano Letters. 9:1806-1811 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl803726b |
| Popis: | The successful growth of suspended carbon nanotubes is normally based on purely empirical results. Here we demonstrate the ability to predict the successful suspension of nanotubes across a range of trench widths by combining experimental growth data with a theoretical description of nanotube mechanics at the growth temperature. We show that rare thermal oscillations much larger than the rms amplitude combined with the large nanotube-substrate adhesion energy together are responsible for unsuccessful nanotube suspensions. We derive an upper limit on the number of deleterious nanotube-substrate interactions that can be tolerated before successful growth becomes impossible, and we are able to accurately explain literature reports of suspended nanotube growth. The methodology developed here should enable improved growth yields of suspended nanotubes, and it provides a framework in which to analyze the role of nanotube-substrate interactions during nanotube growth by chemical vapor deposition. |
| Databáze: | OpenAIRE |
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