ABSORPTION-SPECTROSCOPY USING MICRODROPLET RESONANCE FLUORESCENCE INTENSITIES

被引：15

作者：

EVERSOLE, JD ^{[1
]}

LIN, HB ^{[1
]}

MERRITT, CD ^{[1
]}

CAMPILLO, AJ ^{[1
]}

机构：

[1] USN,RES LAB,DIV OPT SCI,WASHINGTON,DC 20375

来源：

APPLIED SPECTROSCOPY | 1994年 / 48卷 / 03期

关键词：

DROPLET ABSORBENCY; MICROCAVITY EMISSION; MDR AMPLITUDES; DROPLET PH;

D O I：

10.1366/0003702944028254

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Emission spectra from fluorophor-containing microdroplets exhibit a series of sharp peaks due to microcavity effects, superimposed on the usual broad-band dye emission seen in bulk liquid. The amplitudes of these resonance peaks are shown here to be sensitive absorption indicators, and the decrease in apparent resonance intensities may be used as a practical in situ absorption diagnostic procedure in spectroscopy. We illustrate this concept with two examples using a microdroplet stream (with diameters between 13 to 18 mum) of an ethanol/rhodamine dye solution, additionally doped with either bromocresol green or cresyl violet dye. An ability to obtain spectral absorption information, as well as quantitative absorption coefficient estimates in the range of 10 to 10(-3) cm-1, and to infer changes in pH in the droplets is demonstrated. Use of this approach in conjunction with suitable indicator dyes should permit measurement of specific chemical changes occurring in microdroplets.

引用

页码：373 / 381

页数：9

共 37 条

[1] STIMULATED RAMAN-SCATTERING OF FUEL DROPLETS - CHEMICAL CONCENTRATION AND SIZE DETERMINATION [J].