Granulated Metallic Nanostructure Fabricated by Laser Ablation
Abstract
A new metbod for the fabrication of monodisperse metallic nanostructures is described. The method is based on laser ablation of Cu target and subsequent fission of the splashed liquid Cu drops resulting from drops charging in the laser torch plasma up to instability threshold. The monodisperse charged nanoparticles produced by fission are directed to the substrate by the external electric field. The final stage of structure formation is free air oxidation of the deposited film. The structures were studied by SEM, AFM, surface profilometry. and XPS methods. It is shown that the film packed spherical Cu nanoparticles. about 6 nm in diameter covered by the Cu2O layer of the thickness of 0.8 nm. Average gap between the neighbouring nanoparticles is controlled by laser beam intensity and it can be changed from delta w = approx. 1 nm to 4 nm. The fabricated films can consist of one or several monolayers of oxidized Cu granules.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 18, 1999
- Accession Number
- ADP012906
Entities
People
- D. A. Yavsin
- S. A. Gurevich
- V. M. Kouznetsov
- V. M. Kozhevin
- V. M. Mikushkin
Organizations
- Russian Academy of Sciences