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Microbubble Generation for Medical Applications Shirley Zhang Faculty Mentor: Abraham Lee Graduate Student: Kanaka Hettiarachchi
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Overview Microfluidic devices for generating bubbles – test for optimal conditions Create double layer bubbles to contain lipid and oil surrounding gas Test stability and attachment of bubbles in vitro
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Making Devices U.V. Silicon wafer Photoresist Mask PDMS Microfluidic channels Develop
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Monolayer bubbles Components: Lipid (DSPE/DPPE- PEG2000) Gas (PFC or N 2 ) Diameter: ~15 um ColorCam 10x magnification
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Fluorescence DiI mixed into lipids ColorCam 40x magnification
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Double Layer Bubbles Components: Lipid Oil Gas (PFC or N 2 ) No lipid shell – no concentrated fluorescence around bubbles FastCam
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Problems DSPC/DSPE-PEG2K Triacetin N2N2 FastCam
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Future Direction Successfully make stable double layer bubbles Microbubbles as a drug delivery system in cell culture
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