Daniel Blood will defend his dissertation "Simulation, Part Path Correction, and Automated Process Parameter Selection for Ultrashort Pulsed Laser Micromachining of Sapphire" on Friday, June 27 in Larsen 234 at 1:00. Refreshments and drinks will be provided, and all are encouraged to attend.
Mark Sheplak's Research Group
IMG will present six papers at the upcoming Hilton Head Workshop in June 2014 (www.hh2014.org):
- N. Garraud and D. P. Arnold, “Characterization of the rotational dynamics of magnetic micro-discs in suspension” (poster)
- J. Li, V. Tseng, and H. Xie, "Wafer-level fabrication of power inductors in silicon for compact dc-dc converters” (poster)
- D. Mills, T.-A. Chen, and M. Sheplak, “A MEMS optical moiré shear stress sensor for harsh environment applications” (poster)
- O. D. Oniku, A. Garraud, W. C. Patterson, and D. P. Arnold, “Development and modeling of a micromagnetic imprinting process” (poster)
- W. C. Patterson, E. E. Shorman, N. Garraud, and D. P. Arnold, “A magnetic microscope for quantitative mapping of the stray fields from magnetic microstructures” (poster)
- C. Velez, I. Torres-Díaz, O. D. Oniku, L. Maldonado-Camargo, C. Rinaldi, and D. P. Arnold, “Fabrication of Magnetic Microstructures by In Situ Crosslinking of Magnetically Assembled Nanoparticles” (poster)
Daniel Blood will defend his dissertation proposal "Simulation, Part Path Correction, and Automated Process Parameter Selection for Ultrashort Pulsed Laser Micro-Machining of Sapphire" on Thursday, January 16 in MAE-B 210 at 1:00. Refreshments and drinks will be provided, and all are encouraged to attend.
As engineers seek to design more efficient gas turbines, they require a detailed understanding of fundamental thermal-fluid phenomena, as well as active control methods, in high-temperature environments. The high-temperature requirement is based on the increasing turbine inlet temperatures, which have risen to 1500 C, in combined cycle systems in order to improve turbine peak power and efficiency. The limited survivability of silicon-based MEMS sensors in high-temperature and harsh environments has caused researchers to investigate other materials for high-temperature MEMS-based sensors; more specifically sapphire.
Sapphire’s material properties make its entry into the world of high temperature sensors promising, but it also renders most traditional MEMS manufacturing methods impractical. Sapphire’s chemical inertness does not allow for effective dry or wet etching; consequently, a more effective method of machining the material is necessary. One potential solution is to use laser ablation, or material removal by vaporization due to localized heat input, to pattern the material. Femtosecond and picosecond pulsed lasers have shown the ability to reduce or eliminate the thermal damage issues of longer pulsed lasers. These lasers are classified as ultrashort pulse width because the duration of the pulse is so short that it does not allow for thermal conduction into the crystal lattice of the material.
Dylan Alexander will defend his dissertation proposal, entitled "Design, reliability-based optimization, and fabrication of a piezoresistive microelectromechanical microphone with back-side contacts for aeroacoustic measurements" at 8:30am on Thursday, April 18th in LAR 234. Refreshments will be provided.
Per Export Administration Regulations, which apply to the content of the proposal defense (ECCN 9E991), no persons from a designated "terrorist supporting country" is permitted to attend. This includes citizens of Cuba, Iran, North Korea, Sudan, and Syria.
Brandon Bertolucci will defend his dissertation entitled "An Experimental Investigation of the Grazing Flow Impedance Duct at the University of Florida for Acoustic Liner Applications" in Larsen 234 at 2:30 p.m.
Tai-An Chen will defend his dissertation entitled "A Micromachined Floating Element Shear Stress Sensor Using Moiré Transduction for Harsh Environments" in NRF 115 at 12 p.m.
Jess Meloy will defend her dissertation entitled "An Instrumentation-Grade Differential Capacitive MEMS Shear Stress Sensor System for Wind Tunnel Applications" in LAR 234 at 10am. Light refreshments will be provided.
IMG will be well-represented at the upcoming Hilton Head Workshop in June. This workshop is the preeminent microsystems meeting in North America, with an acceptance rate of only 46%. Congratulations to the following authors:
- J. Meloy, J. Sells, V. Chandrasekharan, J. Griffin, L.N. Cattafesta, D.P. Arnold, and M. Sheplak, “Experimental Verification of a Capacitive Shear Stress Sensor for Low-Speed Wind Tunnel Applications” (Poster)
- C.D. Meyer, S.S. Bedair, B.C. Morgan, D.P. Arnold "Ultra-miniaturized power converter modules using micromachined copper scaffolds" (Oral)
- S. R. Samuelson, and H. Xie, “A Large Piston Displacement MEMS Mirror With Electrothermal Ladder Actuator Arrays for Fourier Transform Spectroscopy Applications” (Poster)
- V. Tseng, and H. Xie, “A Novel High-Density Capacitor Design and Its Fabrication Technique Based On Selective Etching" (Poster)
- J.C. Zito, R.J. Durscher, J. Soni, S. Roy, and D. P. Arnold "Mechano-fluidic characterization of microscale dielectric barrier discharge plasma actuators" (Oral)