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Abstract:

Biomineralization, the study of how organisms form minerals such as bones, teeth, and shells, provides examples of strategies for controlling the growth of crystalline materials patterned at the nanoscale. In particular, the use of nanostructured organic and inorganic interfaces to guide assembly and crystallization pathways can result in materials with precisely-controlled structures across length scales. The work focuses on three materials platforms to elucidate solution-based assembly pathways, with an increasing focus on.

In this presentation, I will focus on several related efforts that focus on understanding the role of the solid-liquid interfaces in directing the interaction between polymeric materials and inorganic crystals. First, I will discuss our recent fluid cell Atomic Force Microscopy (AFM) studies of calcite growth in the presence of polymeric and inorganic nanoparticles with varying surface chemistries. In this study, we are investigating the role of the solid-liquid interface in directing the incorporation of secondary (nanoparticle) phases during crystallization. Second, I will present our work using nanopatterned block copolymer templates to control the nucleation and gorwht of inorganic materials. For both of these strategies, I will present results related to the formation mechanisms and internal structures of the resulting nanostructured crystals. Together, these studies have the potential to lead to design criteria for composite single-crystals with unique structure-property relationships. In addition, insights provided by this work may help to elucidate the formation mechanism(s) and properties of biogenic single crystals with incorporated organic material.

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Bio:

Lara A. Estroff received her B.A. with honors from Swarthmore College (1997), with a major in Chemistry and a minor in Anthropology. Before beginning her graduate studies, she spent a year at the Weizmann Institute of Science in Rehovot, Israel as a visiting researcher in the labs of Profs Lia Addadi and Steve Weiner. During this time, she was introduced to the field of biomineralization and studied chemical approaches to archeological problems. In 2003, she received her Ph.D. in Chemistry from Yale University for work done in Prof. Andrew D. Hamilton's laboratory on the design and synthesis of bio-inspired organic superstructures to control the growth of inorganic crystals. After completing graduate school, she was an NIH-funded postdoctoral fellow in Prof. George M. Whiteside's laboratory at Harvard University (2003-2005). Since 2005, Dr. Estroff has been in Materials Science and Engineering department at Cornell University and in 2023 she was named the Herbert Fisk Johnson Professor of Industrial Chemistry. She served as the Director of Graduate Studies in the department from 2015-2019. As of August 2020, she is the current Chair of the Materials Science and Engineering department. Her group focuses on bio-inspired materials synthesis, crystal growth mechanisms, and the high-resolution characterization of pathological mineralization. She has received several awards, including an NSF Early Faculty Career Award in 2009 and a J.D. Watson Young Investigator鈥檚 award from NYSTAR in 2006.