Abstract
Multiwalled carbon nanotubes (MWCNTs) were grown on W substrates by chemical vapor deposition and modified with Au nanoparticles by thermal evaporation. The resulting hybrid structures were investigated by TEM to determine the effects of evaporation rate, nominal film thickness, and substrate temperature on the nanoparticle size and distribution. The results demonstrate that as-grown MWCNTs can be used as a support for well distributed Au nanoparticles, with the size and distribution on the carbon nanotubes being primarily influenced by the nominal film thickness. The observed structures ranged from small 4 nm diameter spherical particles to 150 nm long wire-like structures. Depositions with substrates at 25 °C and 400 °C resulted in similar particle structures, except for the highest amount of deposited Au.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1966-1972 |
| Number of pages | 7 |
| Journal | Carbon |
| Volume | 46 |
| Issue number | 14 |
| DOIs | |
| State | Published - Nov 2008 |
Bibliographical note
Funding Information:This project was supported by the National Science Foundation (CMS-0103476). The authors wish to thank Wayne Gladfelter for letting them use the furnace for carbon nanotube growth. Parts of this work were carried out in the Institute of Technology Characterization Facility, University of Minnesota, which receives partial support from NSF through the NNIN program.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.