AI Article Synopsis
- Confocal epi-illumination optics can enhance surface-enhanced Raman scattering by using a gold-coated tip in an atomic force microscope (AFM) set to semi-contact tapping mode.
- A highly focused 532 nm laser beam significantly boosted the Raman signal when aimed at a 1-micrometer diamond particle with a 50-nanometer tip, achieving an enhancement of about 1,000 times.
- This technique, relying on accessible conventional components, allows for potential improvements and adaptations in micro-Raman analysis for various applications.
Article Abstract
It is demonstrated that confocal epi-illumination/collection optics can be effectively used to generate surface-enhanced Raman scattering at the near-field region of a gold-coated tip for an atomic force microscope operated in semi-contact tapping mode. When the tip, with a 50-nm apex radius, was illuminated by a highly focused laser beam at 532 nm and approached the isolated diamond particle, with a size of approximately 1 microm, the Raman signal was enhanced by approximately 10(3). This result is in good agreement with numerical simulations performed by the finite difference time-domain method. Since our apertureless microscope is based on readily available conventional components, there is wide room for improvements and modifications by common users in various applications of micro-Raman analysis.
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| http://dx.doi.org/10.1366/0003702041389292 | DOI Listing |
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Apertureless tip-enhanced Raman microscopy with confocal epi-illumination/collection optics.
Appl Spectrosc
July 2004
Nanoarchitectonics Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 4, 1-1-1 Higashi, Tsukuba 305-8562, Japan.
Article Synopsis
- Confocal epi-illumination optics can enhance surface-enhanced Raman scattering by using a gold-coated tip in an atomic force microscope (AFM) set to semi-contact tapping mode.
- A highly focused 532 nm laser beam significantly boosted the Raman signal when aimed at a 1-micrometer diamond particle with a 50-nanometer tip, achieving an enhancement of about 1,000 times.
- This technique, relying on accessible conventional components, allows for potential improvements and adaptations in micro-Raman analysis for various applications.
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