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DTSTAMP:20260424T143457Z
UID:1682672400@ist.ac.at
DTSTART:20230428T110000
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DESCRIPTION:Speaker: Prof. Dr. Maksym Yarema\nhosted by Maria Ibáñez\nAbs
 tract: Bimetallic compounds are a vast family of materials with >20000 uni
 que members and record-high performances in catalysis\, plasmonics or ener
 gy-storage technologies. In strong dissonance\, the universal synthesis fo
 r polymetallic nanocrystals is missing\, due to challenges to combine two 
 dissimilar metals at the nanoscale. We overcome this limitation by the ama
 lgamation reaction at the surface of nanocrystals\, thus unlocking up to a
  1000 of new intermetallic nanocrystals with unprecedented quality for siz
 e uniformity\, composition control\, and phase purity. [1] Starting from m
 onometallic seeds\, we carry out a thermal decomposition of metal-amides t
 o dispatch low-melting metals to the surface of nanocrystals and thus trig
 ger a time-efficient and homogeneous alloying to bimetallic compositions. 
 Our new synthesis is convenient and reproducible universal method for high
 -quality intermetallic nanocrystals\, providing uniform compositions and p
 hase purity already after a few minutes of reaction (short reaction time i
 s the key for excellent size distributions). Finally\, nanoscale amalgamat
 ion gives access to unique bimetallic nanocrystals of very dissimilar meta
 ls (like Au and Ga)\, [2] which is impossible via traditional co-precipita
 tion methods. References:[1] J. Clarysse\, A. Moser\, O. Yarema\, V. Wood
 \, and M. Yarema*. Size- and Composition-Controlled Intermetallic Nanocrys
 tals via Amalgamation Seeded Growth. Sci. Adv. 2021\, 7\, eabg1934.[2] J.-
 M. von Mentlen\, J. Clarysse\, A. Moser\, D. Kumaar\, O. Yarema\, T. Sanno
 miya\, M. Yarema*\, and V. Wood*. Engineering of Oxide Protected Gold Nano
 particles. J. Phys. Chem. Lett. 2022\, 13\, 5824-5830. Bio:Maksym Yarema 
 is Assistant Professor in the Institute for Electronics\, ETH Zurich\, whe
 re he leads a research group focusing on Chemistry and Materials Design. M
 aksym was born and raised in Ukraine\, where he received bachelor and mast
 er degree in chemistry from Lviv National University. In 2012\, he earned 
 PhD in engineering from Johannes Kepler University in Linz\, Austria. The 
 same year\, he moved to Switzerland and joined ETH domain: first as a post
 doc at EMPA\, then as a senior scientist and now as a faculty. Maksym is a
  recipient of several prestigious research grants\, among which Marie Curi
 e postdoc\, SNF Ambizione fellowship and ERC Starting grant. His research 
 interests span various topics of chemistry\, materials science and chemica
 l engineering. Particular focus is given to colloidal nanomaterials\, thei
 r synthetic approaches and applications into optoelectronic devices\, memo
 ry cells\, and lithium-ion batteries.
LOCATION:Sunstone Building - Big Seminar Room B \, ISTA
ORGANIZER:
SUMMARY:Prof. Dr. Maksym Yarema: Colloidal Nanocrystals of Metals and Inter
 metallics
URL:https://talks-calendar.ista.ac.at/events/4138
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