Abstract
We report on a sensitive photothermal absorbance detection method for use with a microfluidic chip using polyelectrolytic gel electrodes (PGEs). PGEs are microfabricated into glass substrates by photopolymerization, enabling contact measurement of conductivity without suffering redox effects from the application of a high electric field. Photothermal techniques involve heating of the solution through the radiationless relaxation of optically excited states, which subsequently results in a change in the solution viscosity. The microfluidic based photothermal system monitors the solution viscosity by measuring changes in conductivity. Experimental factors including laser modulation frequency, and laser power were studied. In addition, an electrokinetic separation of potassium, DABSYL-tagged glucosamine (DABSYLGlu) has been demonstrated.
| Original language | English |
|---|---|
| Title of host publication | 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences - The Proceedings of MicroTAS 2008 Conference |
| Publisher | Chemical and Biological Microsystems Society |
| Pages | 934-936 |
| Number of pages | 3 |
| Publication status | Published - 2008 Jan 1 |
| Externally published | Yes |
| Event | 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008 - San Diego, CA, United States Duration: 2008 Oct 12 → 2008 Oct 16 |
Other
| Other | 12th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2008 |
|---|---|
| Country/Territory | United States |
| City | San Diego, CA |
| Period | 08/10/12 → 08/10/16 |
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Bioengineering