A polymer microdevice for tensiometry of insoluble components
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Author / Producer
Date
2014
Publication Type
Conference Paper
ETH Bibliography
yes
Citations
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Data
Abstract
A semi-flexible SU-8 polymer microdevice was designed to deflect in response to a change in surface tension at an air-water interface. The suspended microtensiometer encloses a clean water-air interface, while externally the device is surrounded by an interface containing an insoluble component. The difference in surface tension between the inside and outside of the device, called the surface pressure, causes the 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 a platinum Wilhelmy plate for an independent surface pressure measurement. A resolution of 0.16 mN/m was achieved.
Permanent link
Publication status
published
External links
Book title
EUROSENSORS 2014, the 28th European Conference on Solid-State Transducers
Journal / series
Volume
87
Pages / Article No.
80 - 83
Publisher
Elsevier
Event
28th European Conference on Solid-State Transducers (EUROSENSORS 2014)
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
MEMS; SU-8; Interfacial rheology; Surface pressure
Organisational unit
09482 - Vermant, Jan / Vermant, Jan
02160 - Dep. Materialwissenschaft / Dep. of Materials