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Graduate Exam Abstract


Tim Erickson

Ph.D. Final

June 18, 2014, 11:00 am

Mechanical Engineering Conference Room

DESIGN, OPTIMZIATION AND FABRICATION OF AN INTEGRATED OPTOELECTRONIC SENSING CHIP WITH APPLICATIONS IN GROUNDWATER CONTAMINANT DETECTION AND BIOSENSING


Abstract: The LEAC (Local Evanescent Array Coupled) chip is a CMOS-compatible, waveguide-based, label-free, optoelectronic sensor, which can function as a biosensor or environmental sensor. Unique among optoelectronic sensors, the ~1 cm2 LEAC chip features an integrated photodetector array, which increases device portability, enables multi- analyte detection on a single waveguide and simplifies system instrumentation. At its core, the LEAC chip is simply a precision refractometer, which can sense very small changes in refractive index (~5x10-6) in its multiple upper cladding sensing regions. The chip can be functionalized for detection of biomarkers or groundwater contaminants, which bind or diffuse into the waveguide’s upper cladding sensing region, thereby producing a measurable change in refractive index. By incorporating multiple design improvements, the sensing performance of the LEAC chip has been improved to the point where it is now competitive with low-end surface plasmon resonance (SPR) systems for bulk refractive index sensing. The LEAC chip has been demonstrated for rapid detection of aromatic hydrocarbons, such as benzene, in groundwater at sub-ppm concentrations and for sensing relevant cardiac biomarkers, including TroponinI. Chip design, optimization, fabrication and experimental results will be presented.

Adviser: Kevin Lear
Co-Adviser: N/A
Non-ECE Member: Jacob Roberts, Physics
Member 3: Branislav Notaros, George Collins, Kevin Lear
Addional Members: N/A

Publications:
Tim Erickson, Rajvir Nijjar, Matt Kipper and Kevin Lear, "Characterization of plasma-enhanced teflon AF for sensing benzene, toluene, and xylenes in water with near-IR surface plasmon resonance," Talanta 119 (2014): 151-155.

Tim Erickson and Kevin Lear, "Optimization of the Local Evanescent Array-Coupled Optoelectronic Sensing Chip for Enhanced, Portable, Real-Time Sensing," Sensors Journal, IEEE , vol.13, no.5, pp.1905,1913, May 2013.

Erickson, T., and K. Lear. "An Integrated Optoelectronic Chip for Sensing Aromatic Hydrocarbon Contaminants in Groundwater," Sensors and Actuators B, accepted with minor revisions May 2014.

Yan, Rongjin, N. Scott Lynn, Luke C. Kingry, Zhangjing Yi, Tim Erickson, Richard A. Slayden, David S. Dandy, and Kevin L. Lear. "Detection of virus-like nanoparticles via scattering using a chip-scale optical biosensor." Applied Physics Letters 101, no. 16 (2012): 161111.


Program of Study:
ECE 504
ECE 512
ECE 642
PH 521
ECE 695
EE 385V
ECE 799
GSTR 600