Seminar: Friday, November 10, 2017, Dr. Sang-Hyun Oh
TITLE: Dynamic Nanogap Biosensors Toward Rapid Detection of Single Molecules
SPEAKER: Dr. Sang-Hyun Oh, University of Minnesota
DATE: Friday, November 10, 2017
TIME: 10:00 am
LOCATION: ECS 660
Abstract:
This presentation will show new approaches to design and fabricate nanogap plasmonic sensors that can rapidly trap biomolecules via dielectrophoresis and detect them with optical spectroscopies in the visible, near-infrared, or mid-infrared regime. We use an unconventional fabrication scheme – atomic layer lithography – to create gaps as narrow as 1 nm in metal films using atomic layer deposition, enabling high-throughput wafer-scale production. The resulting nanogap structure can be used concurrently as electrodes for dielectrophoretic sample concentration and highly enhancing substrates for surface-enhanced spectroscopies. We show a variety of resonant nanogap structures that can be used to detect nanoparticles, proteins, and DNA molecules at ultralow concentrations.