(posted on Saturday, October 10, 2020)
November 3, 2020 Akron Section ACS meeting
Professor Raymond Schaak, DuPont Professor of Materials Chemistry, Department of Chemistry at Penn State University is this year’s recipient of the Akron Section Award. He will present two talks on November 3, 2020. The afternoon talk will be hosted by the University of Akron and will begin at 3 PM. See the meeting details below. The evening program will begin at 7:30 PM and will be hosted by the Akron Section using Zoom. Outstanding chemistry students from local colleges and universities who received the Akron Section Scholarship will also be recognized.
Dr. Schaak received a B.S. degree in chemistry from Lebanon Valley College in 1998. In 2001, he received a Ph.D. in materials chemistry from Penn State University under the direction of Professor Thomas Mallouk. From 2001–2003, he was a postdoctoral research associate with Professor Robert Cava at Princeton University. . In 2003, Dr. Schaak began as an Assistant Professor in the Department of Chemistry at Texas A&M University. In 2007, he moved to Penn State University as an Associate Professor of Chemistry and was promoted to Professor in 2011. Dr. Schaak was appointed as the DuPont Professor of Materials Chemistry in 2013.
Afternoon talk, 3 PM using Webex:
Meeting link: https://uakron.webex.com/uakron/j.php?MTID=ma35bf93a8d5a733798ef70c86d2863bf
Meeting number: 120 925 5988
Host key: 643788
Evening program, 7:30 PM using Zoom.
Reservations can be made to Charles Kausch at email@example.com by Noon, Friday, October 30, 2020. Zoom meeting invitation will be sent to members and nonmembers with reservations.
Title: A Designer's Toolkit for Constructing Complex Nanoparticle Libraries
Abstract: Multi-component nanoparticles offer unique opportunities to combine different properties in a single construct, enabling both multi-functionality and the emergence of new synergistic functions. Synthesizing such multi-component nanoparticles requires simultaneous control over size, shape, composition, and structure, as well as interfaces and spatial arrangements. We have been developing two complementary strategies for synthesizing multi-component nanoparticles. The first approach involves heterogeneous seeded growth, where interfaces and asymmetry are introduced by sequentially growing new nanoparticles off of the surfaces of existing nanoparticles. Complex hybrid nanoparticles of a growing number of materials, configurations, and morphologies can now be synthesized. The second approach involves sequential partial cation exchange reactions, where interfaces and asymmetry are introduced by compositional modifications that are made within an existing nanoparticle. A growing library of complex heterostructured metal sulfide nanoparticles can now be rationally designed and then readily synthesized.
Title: Simple Chemistry for Designing a Complex Nanoworld
Abstract: Each time you buy a new electronic device, you expect it to be more powerful and faster with more features than the previous version. And also smaller. And hopefully cheaper as well. At the heart of many electronic devices are circuits that integrate different kinds of materials – metals, semiconductors, insulators, magnets, and much more. Scaling these devices to increasingly smaller dimensions requires addressing fundamental questions about how these types of materials can be integrated together at nanometer dimensions. One of these questions involves chemical synthesis – how do we actually make nanoscale materials in a way that connects them with one another so that they can “talk” to each other? Using simple materials and simple chemistry, we are discovering powerful design rules that let us connect different materials together within nanoscale particles in ways that are predictable, reliable, and controllable. We are then using these design rules to do things that, years ago, we could not have even imagined. For example, a complex nanoparticle that includes several different materials within it would typically take months or years to make in a chemistry laboratory, if it could even be made at all! Now, we are able to easily make tens of thousands of different variations of these types of complex nanoparticles, all using simple chemistry. We used to be limited by “what is possible to make”, but now can begin shifting the question to “what do we want to make” for the systems we have been studying, which focus on metal sulfide materials. These simple chemical tools are allowing us to design and synthesize exceptionally tiny particles that integrate many different types of materials in a straightforward, mix-and-match way.