Research Topics

2D materials are ultrathin crystalline materials which have gained tremendous interest for sensing and optoelectronic applications. Graphene, a semi-metallic (zero-gap) semiconductor, is the most well studied 2D material.  Over the last decade other 2D semiconductors which have sizeable band bandgaps and tuneable band structure, such as such as MoS2, MoSe2, 2D-tellurium, have gained increasing attention. Our focus is developing and fabricating new 2D material-based devices for biomarker sensors, VOC/gas sensors, and optoelectronic devices.

Fluid biomarker protein detection using 2D materials

Biomarkers are measurable indicators that help determine if a person may have or be at risk of developing a disease.  They can also help monitor or predict the effectiveness of treatments and help identify suitable patients for clinical trials of new treatments. This project leverages the unique properties of ultrathin semiconductors, including high surface-to-volume ratio, band structure tunability using surface effects, and high mobility, to detect fluid biomarker proteins at ultra-low concentrations. The objective of this multi-disciplinary project is to develop a new easy-to-use and repeatable method to detect ultralow concentrations of non-invasive fluid biomarkers of Alzheimer’s disease and other diseases.

Volatile organic compound (VOC) and industrial gas detection using 2D materials

VOCs have also been identified as potential biomarkers for a variety of conditions including Alzheimer’s disease, lung cancer, and Parkinson’s disease.  In addition, toxic gases found in the workplace have Threshold Limit Values at parts-to-billion concentrations. Existing detection methods are expensive or are limited to a laboratory setting.  The research team is investigating the use of 2D materials for low-cost and portable detection and identification of VOCs and industrial gases.

New Electronic Device Architectures for Sensing and Optoelectronic Applications

The research team is investigating different device architectures such asymmetric geometry, thickness modulated, and liquid-solid heterojunction diodes for next generation sensing and optoelectronic applications.