Noncontact fluorescence thermometry of acoustically levitated waterdrops
Seaver, M; Peele, JR
| HERO ID | 4929603 |
|---|---|
| In Press | No |
| Year | 1990 |
| Title | Noncontact fluorescence thermometry of acoustically levitated waterdrops |
| Authors | Seaver, M; Peele, JR |
| Journal | Applied Optics |
| Volume | 29 |
| Issue | 33 |
| Page Numbers | 4956-4961 |
| Abstract | Noncontact thermometry based on the fluorescence excitation spectrum of aqueous Eu(3+) (EDTA) near 579 nm allows us to measure the temperature of an evaporating drop of water. The results for drop diameters in the 500-microm-3-mm range confirm theoretical temperature predictions for steady state evaporation. Calibration of the excitation spectrum in a constant temperature cell indicates that +/-1.0 degrees C resolution is possible for temperatures below 20 degrees C. The spectrum depends only on the solution temperature when Eu(3+) (EDTA) concentrations are below 1 x 10(-3) M and when the solution pH is between 4.0 and 10.0. Excitation spectra from levitated waterdrops contain additional noise which degrades the temperature resolution to +/-1.2 degrees C. With this technique we are able to follow the temperature change in an evaporating drop of water as a monolayer of 1-octadecanol forms on the surface and retards the evaporation. |
| Pmid | 20577491 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |