| Author(s): |
P. M. Parthangal; Richard E. Cavicchi; Christopher B. Montgomery; Shirley Turner; Michael R. Zachariah; |
| Title: |
Restructuring of Tungsten Thin Films Into Nanowires and Hollow Square Cross-Section Microducts |
| Published: |
November 01, 2005 |
| Abstract: |
We report on the growth of nanowires and unusual hollow microducts of tungsten by thermal treatment of tungsten films in a RF H2/Ar plasma at temperatures between 550-620 C. Nanowires with diameters of 10-30 nm and lengths between 50-300 nm were formed directly from the tungsten film, while under certain specific operating conditions hollow microducts having edge lengths ~ 0.5 m and lengths between 10-200 m were observed. Presence of a reducing gas like H2 was crucial in growing these nanostructures. Preferential restructuring of the film surface into nanowires or microducts appears to be significantly influenced by the rate of mass-transfer of H2 to the surface. We also give an example of the gas sensing capabilities of tungsten nanowires. |
| Citation: |
Journal of Materials Research |
| Volume: |
20 |
| Issue: |
No. 11 |
| Pages: |
pp. 2889 - 2894 |
| Keywords: |
hollow square microducts;nanowires;tungsten |
| Research Areas: |
Nanowires |
| DOI: |
10.1557/Jmnr.2005.0373 (Note: May link to a non-U.S. Government webpage) |
| PDF version: |
 Click here to retrieve PDF version of paper (3MB) |
