[CCoE Notice] SABIC Seminar Series - Molecular to Nanoparticle-Scale Interactions with Environmental Implications

[Knudsen, Rachel W]

[cid:1a0dc9f6-bf8e-446a-b31f-29355c673034]



Please join us on September 4 for the next installment of the

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Molecular- to Nanoparticle-Scale Interactions with Environmental Implications



[cid:41bb5179-71ee-488f-9949-611fa06250d9]



Stacey Louie, Ph.D.

Assistant Professor

University of Houston



Friday, September 4 | 10:30am

Zoom Meeting ID 931 1001 4275

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LECTURE ABSTRACT



Nanomaterials have broad applications across a variety of disciplines, including environmental engineering, agriculture, and biomedicine. In general, the surface interactions and uptake or release of compounds by a nanoparticle are critical to its desired performance. These interactions and their kinetics can be challenging to measure and predict when the nanoparticle is exposed to complex media and when characterization tools are not readily available to directly probe the nanoparticle surface or matrix. This seminar presents an overview of research tackling these challenges, with specific applications to photocatalytic nanoparticles for water treatment and polymeric nanoparticles for drug delivery. Particular emphasis is placed on the development and application of a suite of advanced analytical methods (including in situ attenuated total reflectance – Fourier transform infrared (ATR-FTIR) spectroscopy and asymmetric flow field – flow fractionation (AF4)) to monitor sorption and release processes. These methods enable real-time measurement of the adsorbed layer composition and loading directly on the nanoparticles, surpassing the level of characterization achievable from conventional assays that rely on indirect measurements of dissolved species to deduce the nanoparticle interactions. These measurements are then applied to achieve mechanistic insights into the reversibility and kinetics of the sorption and release processes. Finally, the implications of the adsorbed layer chemistry for the surface reactivity of the nanomaterials are explored.



SPEAKER BIOSKETCH



Stacey Louie is an Assistant Professor in the Department of Civil and Environmental Engineering at the University of Houston. She received her Ph.D. from Carnegie Mellon University in 2014 and conducted a U.S. National Research Council (NRC) postdoctoral fellowship at the National Institute of Standards and Technology (NIST) – Gaithersburg from 2014 to 2016. She has also served as the Highlights Editor for the Environmental Science: Nano journal from 2015 to 2016 and was honored as an Emerging Investigator for the journal in 2019. Her research covers the environmental implications and applications of inorganic and polymeric nanomaterials.



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