| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 750971 | Sensors and Actuators B: Chemical | 2011 | 5 Pages |
Abstract
Swelling of poly-methylmethacrylate (PMMA) in weak solvents—water, ethanol, and methanol was investigated by interferometry using a simple microfluidic sensor. A change of channel width by ±10 nm, comparable with the surface roughness of the polymer surface, is reliably detected and its temporal evolution was monitored in situ. Dynamics of polymer swelling over time periods from a few seconds to a few days were obtained. An optimized inexpensive microfluidic sensor design using hot embossing with gold sputtering is presented. Such a sensor can be used for high-fidelity adsorption–desorption interferometric sensing and its cost can be optimized for a single use.
Related Topics
Physical Sciences and Engineering
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Analytical Chemistry
Authors
Gediminas Gervinskas, Daniel Day, Saulius Juodkazis,