Nanodevices Enabled by Low-dimensionality Materials

SpeakerAnupama Kaul
Organization Univ. of Texas, El Paso
Location136 Monteith Research Center (MRC)
Start Date March 24, 2017 10:15 AM
End Date March 24, 2017 11:30 AM

Faculty candidate seminar.

Abstract:
Two-dimensional (2D) layered nanomaterials such as graphene, black phosphorus and transition-metal dichalcogenides (TMDCs) have attracted tremendous attention over recent years due to their unique properties and potential for numerous applications. I will discuss our efforts in both the bottom-up and top-down synthesis of TMDCs for device applications. For top-down synthesis we use solution-based chemical exfoliation to form inks of these dispersions which are printed using additive manufacturing
techniques, specifically ink-jet printing, to form devices. The devices range from high-power resistors formed on flexible and rigid substrates, photodetectors, to strain-based sensors which are also integrated into bio-related platforms. For bottom-up synthesis, I will discuss our efforts on the chemical vapor deposition (CVD) of sulphides and selenides using oxide precursors, where we have successfully formed monolayer binary crystalline compounds that are characterized using Raman Spectroscopy, Photoluminescence and other techniques. I will also present results on the photo-response of these TMDCs as they are integrated into opto-electronic device platforms which yields a photoresponsivity that is several orders of magnitude higher compared to prior reports. The low Schottky-barrier height at the contacts and the suspended nature of the membranes are largely believed to be the reasons for yielding the enhanced device performance.

Bio:
Professor Anupama B. Kaul is Associate Dean for Research and Graduate Studies in the College of Engineering at the University of Texas, El Paso (UTEP) and The AT&T Distinguished Professor in the Department of Electrical and Computer Engineering. Shortly upon her arrival to UTEP in the Fall of 2014, she founded and now serves as Director of the Nanomaterials and Devices Laboratory (NDL) (http://utep.edu/kaulgroup), which is composed of three sub-labs: 1) Electronics and Opto-electronics Materials and Device Characterization Lab; 2) Materials Synthesis and Characterization Lab; and 3) Composites and Bio-materials Processing Lab. In 2015, Prof. Kaul obtained close to $2 Million in research funding as a PI and/or Co-PI from externally sponsored grants. Prior to UTEP, Prof. Kaul served as a Program Director at the National Science Foundation (NSF) in the Engineering Directorate from 2011-2014, where she was on rotation as an IPA from the Jet Propulsion Laboratory (JPL), California Institute of
Technology (Caltech) where she spent a total of 12 years. Prof. Kaul obtained her M.S. and Ph.D. degrees from the University of California, Berkeley in Materials Science and Engineering with minors in Electrical Engineering and Physics, while her B.S. degrees (with Honors) were in Physics and Engineering Physics.
She is the recipient of the National Science Foundation’s Director’s Award for Program Management Excellence, one of only two received by the Engineering Directorate in 2013. At JPL-Caltech, Dr. Kaul received the NASA Service Award, a NASA Team Accomplishment Award, multiple NASA Patent Awards
and numerous NASA Technology Brief Awards for her research. Dr. Kaul was selected to be a participant at the US National Academy of Engineering (NAE) 2012 Frontiers of Engineering (FOE) Symposium, and in 2014 she was invited to participate in the bi-lateral Indo-US FOE, also organized by the US NAE. 

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