ELECTRICAL AND COMPUTER ENGINEERING SEMINAR SERIES
Dr. Stephen Morin
Department of Chemistry
University of Nebraska - Lincoln
Thursday, March 15, 2018
3:00 p.m. - 4:00 p.m.
“Elastomeric Surfaces for the Rational Synthesis, Assembly, and Fabrication of Adaptive, Functional Materials”
We are investigating new synthetic strategies for the fabrication of adaptive, hybrid structures comprised of combinations of soft materials (e.g., polymers) and hard materials (e.g., inorganic crystals) with functional (optical, mechanical, magnetic, etc.) characteristics. Central to these efforts are elastomeric surfaces with heterogeneous chemical and physical properties that can be reversibly reconfigured using simple, macro-scale processes such as mechanical deformations—we refer to these mechanically tunable surfaces as 2D “assembly substrates.” Specifically, we focus on systems fabricated from elastomeric polymers, such as silicones, which provide a diversity of chemical and mechanical properties. In this talk I will highlight our recent findings related to the synthesis and application of mechanically tunable surfaces, which include the assembly of solids (e.g., inorganic films with switchable reflectance and microparticles with optical/catalytic activity) and the manipulation of liquids (e.g., picoliter-volume droplets of aqueous solutions and prepolymer droplets). The unique properties of these surfaces and the diverse capabilities they provide will enable new methods and structures for the micro-/nanoscale manipulation, organization, and assembly of liquids/solids, and provide new techniques for the fabrication of hybrid structures applicable to emergent technologies, for example, soft sensors, optics, and electronics, soft actuators for soft machines/robotics, and smart surfaces with adaptive adhesion. Furthermore, the ability of the strategies we demonstrate to operate simultaneously on large numbers of micro-/nanoscale functional components using macroscale processing (e.g., tensile deformations) presents unique advantages in the scalable, advanced manufacturing of functional structures.
Stephen A. Morin is an Assistant Professor in the Department of Chemistry at The University of Nebraska – Lincoln. His research interest include: materials chemistry, nano-/microscale assembly, nanomaterials synthesis and characterization, adaptive materials, soft robotics, hybrid materials systems, and bottom-up fabrication. Stephen completed his B.S in Chemistry at The University of Texas at Austin in 2004. As an undergraduate, Stephen conducted research, under the direction of Professor Keith J. Stevenson, on nitrogen-doped carbon nanofiber electrodes. He joined the Department of Chemistry at the University of Wisconsin – Madison as a graduate student in 2005 and, under the direction of his advisor Professor Song Jin, received his Ph.D. in Chemistry in 2011. His research and thesis, titled “Dislocation-Driven Synthesis and Bioinspired Assembly of Functional Nanomaterials,” focused on the rational synthesis and assembly of nanomaterials based on fundamental concepts of crystal nucleation and growth. From 2011 until 2013, Stephen was a postdoctoral fellow in the lab of Professor George M. Whitesides in the Department of Chemistry and Chemical Biology at Harvard University. At Harvard, Stephen conducted research in the areas of soft robotics and adaptive materials. Stephen joined the faculty in the Department of Chemistry at UNL in Fall of 2013. He was awarded a 3M Non-tenured Faculty Award in 2015 and a NSF CAREER Award in 2016.
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