Welcome to our 2023-2024 program year. Our plan for this program year is for a mix of in-person and virtual meetings. We will be holding virtual meetings in September, October, January, February and May. We will be holding the Undergraduate Research Symposium and our Initiation in-person in the spring.
Iota Sigma Pi: Aurum Iodide Chapter
Announcement for the Undergraduate Research Symposium 2024
Meeting Date and Time: Saturday February 24, 2024
8:30 am – Registration and Continental Breakfast
9:00 am – Welcome and Opening Remarks
9:10 am – Student Oral Presentations
11:00 am – Poster Session
12:00 am – Keynote Speaker
1:00 pm - Awards
Location: Lewis University, AS-158-A, One University Parkway, Romeoville, IL 60446-2200
Speaker: Elena Shevchenko Center for Nanoscale Materials, Argonne National Laboratory, Department of Chemistry and James Frank Institute, University of Chicago
Title: Self-Assembled Structures of Nanoparticles
Abstract: Extensive research has been dedicated to the self-organization of uniform nanoparticles into periodic structures. The self-assembly of nanoparticles holds the potential to offer diverse opportunities for designing structures with precise control over ordering, density, interparticle spacing, and composition. Various instances of both single and multicomponent periodic assemblies have been successfully demonstrated.
Self-assembled structures can be achieved through two primary methods: destabilization of the nanoparticle solution using non-solvents or by solvent evaporation. In both cases, three-dimensional superstructures reminiscent of those formed by atoms are created. This presentation aims to explore how non-solvents impact the ligand shell and delve into the solvation of nanoparticle ligand shells, examining its influence on the nanoparticles' assembly capabilities. The complexity of nanoparticle self-assembly involves a spectrum of attractive and repulsive interactions among particles and ligands. Our investigation has focused on the role of ligand solvation in nanoparticle self-assembly, revealing its substantial influence on the resulting structure types. Furthermore, we have explored the possibility of modifying nanoparticle charges using inorganic precursors to manipulate self-assembly. Additionally, we have sought to understand the contribution of ligand solvation to the mechanical properties of periodic structures, employing the diamond anvil cell technique and other techniques in our studies.
Speaker Bio: Elena Shevchenko was born in Korma, Belarus in 1977. She graduated from Belarusian State University (Belarus) in 1998 and completed her PhD in 2003 at University of Hamburg (Germany) with Prof. Horst Weller. In 2003-2005 she was a joined postdoctoral researcher between Columbia University (Prof. Stephen O’Brien) and TJ Watson Research Center (Prof. Chris Murray). In 2005-2007 she was a staff scientist at the Molecular Foundry, Lawrence Berkeley National Laboratory. In 2007 she accepted a position of a staff scientist and joined Center for Nanoscale Materials, Argonne National Laboratory. Her research interests include synthesis of nanoscale materials, design of multifunctional materials through self-assembly of nanoparticles and understanding the collective properties of such materials, in-situ studies of nucleation of growth of multicomponent nanoparticles and nanoparticle superlattices and application of engineered nanostructures for energy storage and conversion. Among her awards are Technology Review 35 (TR35), Presidential Early Career Award for Scientists and Engineers, Chicago Business 40 under 40 and UChicago Argonne LLC Board of Governors Distinguished Performance Award. She is an Associate Editor for Nanoscale and Nanoscale Advances.
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