Abstract
The near-infrared (NIR) laser tweezers/Raman microprobe system features two charge-coupled device (CCD) cameras with holographic notch filters (HNFs) for the imaging and spectroscopic analysis of molecules in a single microdroplet (MD). One CCD camera and a HNF are used to record an image of the laser microprobe in a trapped MD. The other CCD camera and two HNFs are used with a polychromator to obtain a Raman spectrum of molecules in the MD. A dielectric multilayer coated beam splitter divides the scattered NIR light into two optical paths for the cameras. The system provides sufficient sensitivity to obtain a Raman spectrum of p-cresol contained in a single picoliter toluene MD and sufficient spatial resolution to record an image of the laser microprobe in a trapped MD simultaneously. Furthermore, a difference in the solubility for the p-cresol in bulk solvent and in the MD solvent was clearly observed using this system.
| Original language | English |
|---|---|
| Pages (from-to) | 141-146 |
| Number of pages | 6 |
| Journal | Surface Science |
| Volume | 427-428 |
| DOIs | |
| Publication status | Published - 1999 Jun 1 |
| Externally published | Yes |
| Event | Proceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9) - Kanagawa-ken, Jpn Duration: 1998 Oct 12 → 1998 Oct 16 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry