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Laser techniques in acoustically levitated micro droplets

Omrane, Alaa LU ; Santesson, Sabina LU ; Aldén, Marcus LU and Nilsson, Staffan LU (2004) In Lab on A Chip 4(4). p.287-291
Abstract
Laser techniques were applied to an acoustically levitated droplet for remote investigation of the diameter, species concentration and temperature of the suspended droplet. To this end, the third and the fourth harmonic of a Nd:YAG laser were used for investigation of elastic, fluorescence and phosphorescence signals from the droplet. The droplet was seeded with thermographic phosphors and acetone for the phosphorescence and fluorescence measurements, respectively. The techniques were applied simultaneously using an imaging stereoscope. The imaging device allowed for an identical visualization of incoming signal through separate optical filters. Temperature measurements in droplets is important in the study of e.g. exothermic chemical... (More)
Laser techniques were applied to an acoustically levitated droplet for remote investigation of the diameter, species concentration and temperature of the suspended droplet. To this end, the third and the fourth harmonic of a Nd:YAG laser were used for investigation of elastic, fluorescence and phosphorescence signals from the droplet. The droplet was seeded with thermographic phosphors and acetone for the phosphorescence and fluorescence measurements, respectively. The techniques were applied simultaneously using an imaging stereoscope. The imaging device allowed for an identical visualization of incoming signal through separate optical filters. Temperature measurements in droplets is important in the study of e.g. exothermic chemical reactions, spray processes, combustion, and in bioanalytical applications where the biological material is temperature sensitive or dependent on optimal temperature for function. Results from these investigations showed that temperature measurements in acoustically levitated droplets using laser-induced phosphorescence are feasible. The results also show the potential of simultaneous laser based measurements on levitated droplets. Diameter variation (surface area), mixture concentration and temperature were measured simultaneously. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Lab on A Chip
volume
4
issue
4
pages
287 - 291
publisher
Royal Society of Chemistry
external identifiers
  • pmid:15269793
  • wos:000222814200005
  • scopus:4344649330
ISSN
1473-0189
DOI
10.1039/b402440k
language
English
LU publication?
yes
id
e28ac872-b831-4e83-b033-ab4cca85eb03 (old id 141332)
date added to LUP
2007-06-27 13:50:47
date last changed
2017-01-01 04:29:49
@article{e28ac872-b831-4e83-b033-ab4cca85eb03,
  abstract     = {Laser techniques were applied to an acoustically levitated droplet for remote investigation of the diameter, species concentration and temperature of the suspended droplet. To this end, the third and the fourth harmonic of a Nd:YAG laser were used for investigation of elastic, fluorescence and phosphorescence signals from the droplet. The droplet was seeded with thermographic phosphors and acetone for the phosphorescence and fluorescence measurements, respectively. The techniques were applied simultaneously using an imaging stereoscope. The imaging device allowed for an identical visualization of incoming signal through separate optical filters. Temperature measurements in droplets is important in the study of e.g. exothermic chemical reactions, spray processes, combustion, and in bioanalytical applications where the biological material is temperature sensitive or dependent on optimal temperature for function. Results from these investigations showed that temperature measurements in acoustically levitated droplets using laser-induced phosphorescence are feasible. The results also show the potential of simultaneous laser based measurements on levitated droplets. Diameter variation (surface area), mixture concentration and temperature were measured simultaneously.},
  author       = {Omrane, Alaa and Santesson, Sabina and Aldén, Marcus and Nilsson, Staffan},
  issn         = {1473-0189},
  language     = {eng},
  number       = {4},
  pages        = {287--291},
  publisher    = {Royal Society of Chemistry},
  series       = {Lab on A Chip},
  title        = {Laser techniques in acoustically levitated micro droplets},
  url          = {http://dx.doi.org/10.1039/b402440k},
  volume       = {4},
  year         = {2004},
}