Publication Info
Type Thesis
Year 2003
Venue Master’s thesis, Florida State University, Tallahassee, Florida, USA.
Quick Navigation
Thesis

Microdevice fabrication by softlithography and nonlinear phenomena in microchannels

Kahveci M

2003 — Master’s thesis, Florida State University, Tallahassee, Florida, USA.

All Publications

Citation (APA)

Kahveci M (2003). Microdevice fabrication by softlithography and nonlinear phenomena in microchannels. Master’s thesis, Florida State University, Tallahassee, Florida, USA.

Abstract

This thesis explores microdevice fabrication via soft-lithography and the size-dependent nonlinear dynamics in microchannels. The fabrication of micro-fluidic devices by a soft-lithography technique was introduced in this study. This technique allows one to photographically print micropatterns on polished silicon wafer surface in high precision along with great reproducibility. The patterned silicon wafer is used to cast poly-(dimethylsiloxane) (PDMS) polymer, giving rise to negative replica (valley) on the PDMS surface. Because the fabrication is inexpensive and technologically feasible, this technique allows one to integrate micro-fluidic devices in various experimental designs. The micro-fluidic system is then used as a reactor for the Belousov-Zhabotinsky (BZ) reaction. The investigation of the front dynamics revealed that velocity of the chemical waves differ in a range of inner diameter sizes of the microchannels in the PDMS polymer, a property concluded to be caused by the bromine diffusion into the PDMS polymer. Due to high volume to surface ratio, faster front velocities are observed in narrower channels. Finally, the measurement of the partition coefficient of bromine into the PDMS polymer is performed.

BibTeX

@phdthesis{bh, title = {Microdevice fabrication by softlithography and nonlinear phenomena in microchannels}, author = {Kahveci M}, year = {2003}, howpublished = {Master’s thesis, Florida State University, Tallahassee, Florida, USA.}, abstract = {This thesis explores microdevice fabrication via soft-lithography and the size-dependent nonlinear dynamics in microchannels. The fabrication of micro-fluidic devices by a soft-lithography technique was introduced in this study. This technique allows one to photographically print micropatterns on polished silicon wafer surface in high precision along with great reproducibility. The patterned silicon wafer is used to cast poly-(dimethylsiloxane) (PDMS) polymer, giving rise to negative replica (valley) on the PDMS surface. Because the fabrication is inexpensive and technologically feasible, this technique allows one to integrate micro-fluidic devices in various experimental designs. The micro-fluidic system is then used as a reactor for the Belousov-Zhabotinsky (BZ) reaction. The investigation of the front dynamics revealed that velocity of the chemical waves differ in a range of inner diameter sizes of the microchannels in the PDMS polymer, a property concluded to be caused by the bromine diffusion into the PDMS polymer. Due to high volume to surface ratio, faster front velocities are observed in narrower channels. Finally, the measurement of the partition coefficient of bromine into the PDMS polymer is performed.} }