Langmuir monolayer characterization via polymer microtensiometers
| Autor: | Pieter Gijsenbergh, Martina Pepicelli, Christopher L. Wirth, Robert Puers, Jan Vermant |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Langmuir Metals and Alloys Analytical chemistry Polymer Condensed Matter Physics Surface pressure Compression (physics) Surfaces Coatings and Films Electronic Optical and Magnetic Materials SU-8 Tensiometry Surface tension MEMS chemistry Pulmonary surfactant Monolayer Electrical and Electronic Engineering Composite material Instrumentation Wilhelmy plate |
| Popis: | A semi-rigid, semi-flexible SU-8 polymer microdevice was designed to measure changes in interfacial tension at an air-water interface. The suspended microtensiometer enclosed a clean air-water interface, with an insoluble surfactant on the exterior. The difference in surface tension between the inside and the outside of the device, called the surface pressure, caused the 850 µm by 3 mm device to deflect. Finite element simulations were performed to predict device behavior prior to fabrication. Finished devices were tested in a Langmuir trough during multiple compression and expansion cycles using large area changes and slow compression speeds. Shorter experiments subjecting the interface to rapid local monolayer concentration variations were also performed. A platinum Wilhelmy plate was used as an independent surface pressure measurement. The microtensiometer had a theoretical resolution of 0.02 mN·m-1 publisher: Elsevier articletitle: Langmuir monolayer characterization via polymer microtensiometers journaltitle: Sensors and Actuators A: Physical articlelink: http://dx.doi.org/10.1016/j.sna.2015.03.041 content_type: article copyright: Copyright © 2015 Elsevier B.V. All rights reserved. ispartof: Sensors and Actuators A, Physical vol:229 pages:110-117 status: published |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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