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Fall 2014
Directionality or anisotropy is one of the benchmark properties of gecko adhesion, allowing geckos to adhere strongly to a surface and detach easily with little effort. Geckos achieve anisotropy by means of intricate micro-nano hierarchical structures on its feet, which is very difficult to mimic...
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Spring 2014
This work provides a guideline for gecko inspired dry adhesive design and simulation. Mechanical property testing for several polymers commonly used in gecko adhesives (Kraton G1657 thermoplastic elastomer, ST-1060, and ST-1087 polyurethane elastomers) allowed hyperelastic and viscoelastic...
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Development of a Multi-material Extruder System to 3D Print Hard Thermoplastics, Soft Elastomers and Liquid Metals
DownloadSpring 2019
Functional sensors often consist of rigid parts, soft rubber-like parts, and mechanically tunable electronic components. As part of a larger project to 3D print tunable antennas, it was tasked to develop a printer that could directly produce 3D stretchable electronics with soft and hard...
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Investigating the Performance of Randomly Patterned Superhydrophobic Surfaces in Laminar and Turbulent Channel Flows
DownloadSpring 2019
Superhydrophobic surfaces (SHSs) have been investigated based on their success in water repellency, anti-fouling, and drag reducing effects seen in nature (Neinhuis & Bartlott 1997; Kreuz et al. 2001). SHSs utilize a low surface energy material with a microscale surface roughness to prevent water...
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Liquid Metal Based Test Structures and Reconfigurable Microfluidic Microwave Devices and Antennas
DownloadFall 2017
Electrically reconfiguring communicational devices suffer from a number of drawbacks: incorporating electrical elements such as varactors in unit cell level to manipulate the inductance/capacitance of the circuits and maintaining RF/DC interference isolation in power supply is very challenging....
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Microfluidic Investigations of CO2 Mass Transport at Elevated Pressure and Salt Precipitation
DownloadFall 2021
Carbon capture and sequestration (CCS) in geological reservoirs is one of the mitigation strategies to slow down the increasing atmospheric CO2 concentration due to human activities. Effectively characterizing the transport phenomena between CO2 and materials in reservoirs, including mass/heat...