High-precision interferometric monitoring of polymer swelling using a simple optofluidic sensor

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/199328

Title: High-precision interferometric monitoring of polymer swelling using a simple optofluidic sensor
Author(s): Gervinskas, Gediminas; Day, Daniel; Juodkazis, Saulius
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.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics
Source: Sensors and Actuators, B: Chemical, Vol. 159, no. 1 (Nov 2011), pp. 39-43
Publication year: 2011
FOR Code(s): 0301 Analytical Chemistry; 0912 Materials Engineering
Keyword(s): Interferometry; Microfluidics; PMMA; Polymer swelling; Poly-methylmethacrylate
Publisher: Elsevier
ISSN: 0925-4005
Publisher URL: http://dx.doi.org/10.1016/j.snb.2011.06.021
Peer reviewed