Topographical and Chemical Microanalysis of Surfaces with a Scanning Probe Microscope and Laser-Induced Breakdown Spectroscopy
| Autor: | J. L. Beauchamp, Dmitri Kossakovski |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Scanning Hall probe microscope
Chemistry business.industry Physics::Optics Scanning capacitance microscopy Analytical Chemistry Scanning probe microscopy Optics Nitrogen laser Laser-induced breakdown spectroscopy Laser power scaling business Feature-oriented scanning Vibrational analysis with scanning probe microscopy |
| Zdroj: | Analytical Chemistry. 72:4731-4737 |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/ac0005058 |
| Popis: | Spatially resolved chemical imaging is achieved by combining a fiber-optic scanning probe microscope with laser-induced breakdown spectroscopy in a single instrument, TOPOLIBS. Elemental composition of surfaces can be mapped and correlated with topographical data. The experiment is conducted in air with minimal sample preparation. In a typical experiment, surface topography is analyzed by scanning a sharp fiber-optic probe across the sample using shear force feedback. The probe is then positioned over a feature of interest and pulsed radiation is delivered to the surface using a nitrogen laser. The pulse vaporizes material from the surface and generates a localized plasma plume. Optical emission from the plume is analyzed with a compact UV/visible spectrometer. Ablation crater size is controlled by the amount of laser power coupled into the probe. Sampling areas with submicrometer dimensions are achieved by using reduced laser power. |
| Databáze: | OpenAIRE |
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