Project 8: Gas Microfluidics using MEMS Micro-pumps (Prof. Shamus McNamara, ECE)
Healthcare and Energy Topic: Dr. McNamara has been studying gas pumping and microfluidics in his lab for a number of years (NSF Grants 0601453, 1133877). In the past 5 years he has supervised 7 undergraduate projects (3 co-op). The undergraduates have been very successful, having presented at international conferences and have journal publications [1-8]. The research will focus on the Knudsen gas pump, which is a thermally driven pump that features no moving parts [1-17]. A novel multifunctional nano-porous thermoelectric material is being developed that works as a combined heater, cooler, and array of gas channels for effecting the thermally driven pumping mechanism (Figure). The pump is being integrated with microfluidic channels for lab-on-a-chip applications The undergraduate student will help synthesize and test new nano-materials, investigate new methods of making better electrical contact without plugging the pores, create microfluidic channels, and embed nano-porous materials into the microfluidic channels. The undergraduate student will learn micro/nano fabrication techniques, layout and simulation tools, and learn how to test microfluidic devices. This project should appeal to students interested in Chemistry, Physics, ME, ChE and ECE.
 S. Miles, A. Bell, K. Pharas, and S. McNamara, "Solar Thermal Powered and Body Heat Powered Knudsen Gas Pump," in ASME 2011 9th International Conference on Nanochannels, Microchannels and Minichannels, Edmonton, Canada, 2011.
 K. Pharas, S. Miles, and S. McNamara, "Thermal Transpirational Flow in the Transitional Flow Regime," J. Vac. Sci. Techn., vol. 30, p. 050603, 2012.
 S. Miles and S. McNamara, "Ten Stage Knudsen Gas Pump," in ASME 10th International Conference on Nanochannels, Microchannels, and Minichannels, Puerto Rico, 2012, p. 73209.
 A. Bell, K. Pharas, W. D. Ehringer, and S. McNamara, "Body Temperature Powered Device for Dermal Wound Drug Delivery," in IEEE MEMS Conference, Paris, France, 2012, pp. 930-932.
 A. Faiz, A. D. Bell, G. Sumanasekera, and S. McNamara, "Nanoporous Bi2Te3 Thermoelectric Based Knudsen Gas Pump," J. Micromech. Microeng., vol. 20, p. 035002, 2014.
 A. Bell, W. D. Ehringer, and S. McNamara, "Scavenged body heat powered infusion pump," Journal of Micromechanics and Microengineering, vol. 23, p. 114019, 2013.
 A. Bell, W. D. Ehringer, and S. McNamara, "Wearable Infusion Pump Powered By Scavenged Body Heat," in PowerMEMS, Atlanta, Georgia, 2012, pp. 157-160.
 A. D. Bell and S. McNamara, "Multistage Human Heat Powered Knudsen Pump for Use in a Wearable Infusion Pump," in 7th Intl. Conf. Microtechnologies in Medicine and Biology (MMB 2013), Marina Del Ray, CA, 2013.
 S. McNamara and Y. B. Gianchandani, "On-Chip Vacuum Generated by a Micromachined Knudsen Pump," IEEE J. MEMS, vol. 14, pp. 741-746, 2005.
 K. Pharas, D. Copic, C. Yamarthy, and S. McNamara, "Knudsen Pump with Wide Channel for High Gas Flow," in KY EPSCoR Conference, Lexington, KY, 2007.
 D. Copic, E. Brehob, and S. McNamara, "Theoretical Efficiency of a Microfabricated Knudsen Pump," in University/Government/Industry Micro-Nano Symposium (UGIM), Louisville, KY, 2008, pp. 107-110.
 D. Copic and S. McNamara, "Efficiency Derivation for the Knudsen Pump with and without Thermal Losses," Journal Vacuum Science and Technology A, vol. 27, pp. 496-502, 2009.
 C. Yamarthy, K. Pharas, A. Schultz, and S. McNamara, "Pneumatic Pumping of Liquids Using Thermal Transpiration for Lab-on-a-Chip Applications," in Proceedings International IEEE Sensors Conference, New Zealand, 2009, pp. 1931-1934.
 A. Faiz and S. McNamara, "Mathematical model of a nanoporous thermoelectric based Knudsen pump," J. Vac. Sci. Techn. A, vol. 32, p. 041601, 2014.
 S. Miles and S. McNamara, "Radial Knudsen Pump Simulation Using Comsol Multiphysics," presented at the KY NanoSymposium, Louisville, KY, 2013.
 A. Faiz and S. McNamara, "Nanoporous Thermoelectric Knudsen Pump Integrated with a Microfluidic Channel," in Proceedings PowerMEMS 2012 Conference, Atlanta, GA, 2012, pp. 259-262.
 A. Faiz and S. McNamara, "Nano-Porous Bi2Te3 Thermoelectric Based Knudsen Gas Pump," presented at the KY Nanosymposium, Louisville, KY, 2013