Imaging and spectroscopic analysis of single microdroplets containing p-cresol using the near-infrared laser tweezers/Raman microprobe system

Katsuhiro Ajito, Masao Morita

Research output: Contribution to journalConference articlepeer-review

16 Citations (Scopus)

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 languageEnglish
Pages (from-to)141-146
Number of pages6
JournalSurface Science
Volume427-428
DOIs
Publication statusPublished - 1999 Jun 1
Externally publishedYes
EventProceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9) - Kanagawa-ken, Jpn
Duration: 1998 Oct 121998 Oct 16

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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