Abstract
STM lithography by pulsing the tip-sample bias was used to deposit nanometer-sized clusters on a copper surface using gold tips. Prior to writing each cluster, we extracted the local tip radius of curvature from STM images of slip band steps previously formed on the copper surface. This novel technique permitted in-situ observation of changes in both cluster size and local tip structure while using a single tip. It was found that the cluster diameter increases with the square root of tip radius. Using a model in which we assume that deposition occurs only from that region of the tip within a certain distance from the sample surface, we were able to derive an expression consistent with the experimental data.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 331-338 |
| Number of pages | 8 |
| Journal | Applied Surface Science |
| Volume | 78 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jul 1994 |
Funding
This research is supported by the Materials Research Center at Northwestern University, which is funded by the NSF-DMR Grant No. 9120521.M easurementsw ere performed in the Surface ScienceF acility at NorthwesternU niver-sity. We thank Mr. Richard Benassif or constructing the STM analog/digital interface.
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films