Department of Chemistry

Phone: (202) 994-6121 Fax: (202) 994-5873gwchem@gwu.eduE-mail:

Washington, DC 20052800 22nd street, NW | SEH 4000

Website: http://chemistry.columbian.gwu.edu

“ Metal-Ligand Chemistry in Multimetallic Nanoparticle Synthesis and Performance”

Jill E. Millstone Associate Professor Department of Chemistry University of Pittsburgh

Friday, November 17, 2017 SEH B1220 2:00 - 3:00 p.m. Refreshments will be served at 1:45 p.m.

Metal-ligand chemistry is shown to be a pivotal tool in the control of multimetallic nanoparticle formation, structure, and emergent properties. Specifically, small molecule ligand chemistry is used to mediate the incorporation and distribution of metals in and on discrete, colloidal nanoparticle substrates, as well as modulate their emergent optoelec-tronic features once formed. Here, we focus on the incorporation of 3d transition metals into Au and Pt hosts. The resulting structures are characterized by a wide variety of meth-ods including NMR spectroscopy, electron microscopy, and photoelectron spectroscopy techniques. Specifically, we demonstrate that nanoparticle ligand chemistry may be used to access previously unobserved mixtures of metals, unique distributions of metals at the surface of a colloidal particle, as well as composition-tunable and surface chemistry-con-trolled photoemission. These concepts and characterization approaches are also extended to degeneratively doped semiconductor nanoparticles. Taken together, the results provide mechanistic platforms for the development of nanoscale architectures that are promising for a wide variety of applications ranging from light-driven catalysis to covert signaling.

Department of Chemistry Seminar

Jill E. Millstone is an Associate Professor of Chemistry at the University of Pittsburgh with affiliated appointments in the Depart-ments of Chemical Engineering and Mechanical Engineering and Materials Science. Before joining the University of Pittsburgh, she completed her Ph. D. at Northwestern University and post-doctoral research at the University of California, Berkeley. Since the Fall of 2011, she has received awards including the NSF CAREER Award, the ACS Unilever Award for Outstanding Young Investi-gator in Colloid and Surfactant Science and the Cottrell Research Scholar Award. She currently serves as an associate editor at Nanoscale, and on the editorial advisory board of ACS Nano. Her group studies the chemical mechanisms underpinning metal nanoparticle synthesis, surface chemistry, and optoelectronic behaviors.

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