Photoinduced Formation of Zinc Nanoparticles by UV Laser Irradiation of ZnO
| Autor: | J. T. Dickinson, Enamul H. Khan, Lynn A. Boatner, Stephen C. Langford, Wayne P. Hess |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Excimer laser business.industry medicine.medical_treatment Nanoparticle chemistry.chemical_element Surfaces and Interfaces Zinc Condensed Matter Physics Photochemistry Laser Fluence law.invention Transition metal chemistry law Electrochemistry medicine Optoelectronics General Materials Science Irradiation business Single crystal Spectroscopy |
| Zdroj: | Langmuir. 25:1930-1933 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la804143u |
| Popis: | Simple exposure of single-crystal ZnO to 193 nm excimer laser radiation at room temperature results in unexpected coloration. The gray to nearly black colored material, seen principally in the irradiated laser spot, is superficial. We present unambiguous evidence that this coloration is due to high densities of metallic Zn nanoparticles growing on the exposed surface of the crystal. Higher fluence laser exposure generates accumulated surface metal just outside of the irradiated spot. We suggest that the near surface bulk is photodecomposing; thermally driven diffusion leads to surface Zn metal aggregation. |
| Databáze: | OpenAIRE |
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