Topographical and Chemical Microanalysis of Surfaces with a Scanning Probe Microscope and Laser-Induced Breakdown Spectroscopy
- Creators
- Kossakovski, Dmitri
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Beauchamp, J. L.
Abstract
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.
Additional Information
© 2000 American Chemical Society. Received 2 May 2000; accepted 17 July 2000; published online 6 September 2000; published in print 1 October 2000. This work was supported by NASA (Grant NAG5-7081) and the Beckman Institute at Caltech. We thank Lara Hughes and Professor Glen Cass for providing the aerosol sample, Professor Thomas Ahrens for providing the Murchison meteorite sample, and Professor George Rossman for providing the basaltic rock sample.Additional details
- Eprint ID
- 69421
- Resolver ID
- CaltechAUTHORS:20160803-151734805
- NAG5-7081
- NASA
- Created
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2016-08-03Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field