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

被引：19

作者：

Ajito, K ^{[1
]}

Morita, M ^{[1
]}

机构：

[1] NTT, Basic Res Labs, Kanagawa 2430198, Japan

来源：

SURFACE SCIENCE | 1999年 / 427-28卷

关键词：

laser trapping; laser tweezers; microdroplets; microparticles; NIR; optical imaging; p-alkylphenol; p-cresol; Raman microprobe spectroscopy;

D O I：

10.1016/S0039-6028(99)00249-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：141 / 146

页数：6

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