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Persistent Micelle Templates for Single-Variable Series of Porous Nanomaterials
February 16, 2023 @ 5:30 pm - 6:30 pm PST
Free – $5
- Prof. Morgan Stefic, Chemistry and Biochemistry Dept., Univ. of South Carolina
- Sponsored by the Golden Gate Polymer Forum (GGPF)
- 6:30 PM Online via Zoom, Registration required (Registration deadline: Feb. 15 at 1pm)
Abstract
Block polymer structure‐directing agents (SDA) enable the production of porous nanoscale materials by controlling the arrangement of material precursors. The subsequent removal of the polymer thus yields porous nanomaterials that are useful for a wide range of applications including energy storage and catalysis. The iteration of most such strategies however leads to complex sequences of nanomaterials that change multiple spatial variables at a time, including morphology, pore size, and wall thickness. In contrast, persistent micelle templates (PMT) are based upon the kinetic entrapment of polymer chains to enable sample adjustments with constant morphology (isomorphic) and constant pore size (ref.1). Such series of nanomaterials with a single spatial variable are well poised to clarify cause-and-effect for nanoscale phenomena. The PMT approach has enabled wide spanning feature sizes over two orders of magnitude with 2 Å precision adjustments between samples. The PMT method is simple to validate with diffraction models and is feasible in any laboratory with minimal equipment. Finally, recent energy device research enabled by PMT is noted where tailored nanomaterials provided a unique perspective to unravel complex battery behaviors (ref. 2).
References
1) Stefik, M., Single-Variable Porous Nanomaterial Series from Polymer Structure Directing Agents. Journal of Materials Research 2022, 37, 25-42. Open Access: https://dx.doi.org/10.1557/s43578-021-00421-0
2) van den Bergh, W.; Stefik, M., Understanding Rapid Intercalation Materials One Parameter at a Time. Advanced Functional Materials 2022, 32, 2204126. Open Access: https://dx.doi.org/10.1002/adfm.202204126
Speaker Background & Research Interests:
Morgan Stefik is an Associate Professor of Chemistry and Biochemistry at the University of South Carolina and is the founding director of the South Carolina SAXS Collaborative. He obtained a BE degree in Materials Engineering from California Polytechnic State University in 2005 and a PhD degree in Materials Science from Cornell University in 2010. He then completed postdoctoral research at École Polytechnique Fédérale de Lausanne. His accolades include a National Science Foundation CAREER Award in 2018, recognition as an Emerging Investigator by the Journal of Materials Chemistry A in 2017, a Breakthrough Star Award from the University of South Carolina in 2018, election to the council of the International Mesostructured Materials Association in 2018, selection as an ACS PMSE division Young Investigator in 2020, recognition as an Early Career Scholar by the Journal of Materials Research in 2022, a Garnet Apple Award for Teaching Innovation from the University of South Carolina in 2022, and a Hanse-Wissenschaftskolleg Fellowship in 2022.