Building a New Materials Toolkit: Using Surface Chemistry to Direct the Morphology and Deposition of Thin Films and Nanoobjects

Date and Time: 
Fri, 01/17/2020 - 11:00am
Dr. Amy V. Walker
Department of Materials Science and Engineering, University of Texas at Dallas
Discovery Park F285

Novel and advanced materials and devices for sensors, actuators, molecular and organic electronics, photovoltaics have many exciting applications including in healthcare, electronics, and energy harvesting and generation. However, for these to become integrated into everyday practical devices there are many challenges to be addressed. Perhaps the largest challenge is to direct and control the deposition of materials from the molecular scale to the mesoscale. Further these materials, whether nano-objects or thin films must be integrated into complex functional structures in a predictable and controlled way. In this talk we will describe our recent progress in synthesizing in situ with precise placement both nano-objects and films of two-dimensional materials, in particular transition metal dichalcogenides. We exploit our understanding of the common features of gas-phase and solution-based deposition methods to formulate design guidelines to control the in situ synthesis and placement of these complex materials with nanoscale precision, and to develop new faster, precise deposition processes.


Amy Walker is the Interim Head and Professor of Materials Science and Engineering at the University of Texas at Dallas. She is also an Affiliate Professor of Chemistry (2012-present) and Electrical Engineering (2016-present). Amy received her BA(Hons) in Natural Sciences (Experimental and Theoretical Physics) in 1995 and her PhD in Chemistry in 1998 from the University of Cambridge. She then moved to the USA to become a postdoctoral scholar in the Chemistry department of the University of Pittsburgh. In 2000 she moved as a postdoctoral scholar to Pennsylvania State University. Subsequently in 2002 she joined the Department of Chemistry, Washington University in St. Louis as an assistant professor and inaugural member of the Center for Materials Innovation. In 2009 she joined the Department of Materials Science and Engineering, University of Texas at Dallas as an associate professor and was promoted to professor in 2015. Her research concerns the development of simple, robust methods for constructing complex two- and three- dimensional structures by manipulating interfacial chemistry, as well as surface/imaging analytical techniques for probing the structures produced. The primary techniques employed in her research group are TOF SIMS, XPS, and Raman spectroscopy, and she has an active program in the development of TOF SIMS and XPS methodology and data analysis. To date she has published over 90 articles in refereed journals and edited books, and given over 90 invited presentations at international and national conferences, companies, national laboratories and universities. For this work she has been awarded a 2003 Ralph E. Powe Junior Faculty Award, a DuPont Young Professor Grant (2006-2009), a 2008 ACS PROGRESS/Dreyfus Lectureship and a Fellow of the AVS (2015). She is the 2020 AVS President. Amy has also held a number of other positions in the AVS including the Chair of the AVS Trustees (AVS Awards Committee) (2018), an AVS Trustee (2016-2018, elected 2015), the Program Chair of the AVS International Symposium and Exhibition (2017; Vice Program Chair in 2016), and director of the AVS (2013-2014, elected 2012).