Chemistry Seminar Series: Kevin KittilstvedExport this event to calendar

Tuesday, January 14, 2020 — 10:00 AM EST

Emergent Phenomena in Old Materials

Kevin Kittilstved ​​​​​​
Department of Chemistry
University of Massachusetts Amherst

Tuesday, January 14, 2019
10:00 a.m.
C2-361 (Reading Room)

<--break->Abstract

The electronic structure and functionality of semiconductors is very sensitive to the presence of defects in the lattice. Aliovalent transition metal dopants in bulk oxide semiconductors are well-known multifunctional materials with potential application in visible light photocatalysis, spintronics and optoelectronics. However, these types of materials have received little attention as nanocrystalline materials. In this talk, I will present our recent work on the synthesis and characterization of transition-metal dopants in colloidal metal oxide nanocrystals. We have discovered unique electronic structures that can be easily exploited in this class of aliovalent diluted magnetic semiconductors. I will also demonstrate the tunability and reversibility of this post-synthetic modification of the nanocrystals to study emergent interactions between dopants and free carriers in these materials. In conclusion, I will compare these aliovalent DMSs to the more common isovalent DMSs.

Location 
C2 - Chemistry 2
Room 361
200 University Avenue West

Waterloo, ON N2L 3G1
Canada

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