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DTSTART:20260329T030000
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DTSTAMP:20260416T222500Z
UID:1771497000@ist.ac.at
DTSTART:20260219T113000
DTEND:20260219T123000
DESCRIPTION:Speaker: Christopher B. Murray & Cherie R. Kagan\nhosted by Mar
 ia Ibanez\nAbstract: Christopher B. Murray |Multi-Component Nanoscale Asse
 mbly for Nanocrystal-Based Materials and Devices"The advances in the multi
 scale multi-component organization of ensembles of monodisperse colloidal 
 nanocrystals (NCs) with controlled composition\, size\, and shape now repr
 esent a new strategy for soft optical metamaterial fabrication. These NCs\
 , acting as 'artificial atoms' with tunable electronic\, optical\, and mag
 netic properties\, pave the way for the development of a new periodic asse
 mbly.  They are ideal building blocks for incorporation into new thin fil
 ms\, micro-resonators\, and integrated devices. In this brief talk\, I wil
 l briefly outline how these tailored NCs can be assembled into single-comp
 onent\, binary\, and ternary NC superlattices\, providing a scalable route
  to the production of soft metamaterials. The scalability of this process 
 ensures its feasibility for large-scale applications. The modular assembly
  of these NCs enables the enhancement of desirable features of the underly
 ing quantum phenomena through photonic feedback. Strategies for emulsion-b
 ased assembly that enable continuous production and tuning of stimuli-resp
 onsive\, tunable photonic resonators from dense NC 'supraparticles' will b
 e highlighted. Progress in the optical characterization of supraparticles 
 and their potential as whispering-gallery-mode resonators\, with a low las
 ing threshold\, will be shared.____________Cherie R. Kagan |Colloidal Semi
 conductor Quantum Dot OptoelectronicsColloidal semiconductor quantum dots 
 (QDs) are prized for their size-dependent electronic and optical propertie
 s\, with bandgaps tunable from the UV to the infrared\, and as solution-pr
 ocessable building blocks of “artificial” solid-state materials. Here\
 , I will describe our work in designing the electronic and optical propert
 ies of QD assemblies and their integration in optoelectronic devices. We u
 se chemical treatments\, namely ligand exchange\, colloidal atomic layer d
 eposition\, and cation exchange to tailor interparticle distance and compo
 sition\, to add impurities\, control stoichiometry\, or make entirely new 
 compounds or matrices. Electrical and cw\, ultrafast\, and spatially resol
 ved optical spectroscopies are used to show that these treatments allow th
 e design of QD assemblies with tailored carrier energy\, type\, concentrat
 ion\, mobility\, and lifetime\, which we have used to create n- and p-type
  thin films from which we build optoelectronic and electronic devices and 
 circuits.
LOCATION:Raiffeisen Lecture Hall\, ISTA
ORGANIZER:diana.gruber@ista.ac.at
SUMMARY:Christopher B. Murray & Cherie R. Kagan: Multi-Component Nanoscale 
 Assembly for Nanocrystal-Based Materials and Devices | Colloidal Semicondu
 ctor Quantum Dot Optoelectronics
URL:https://talks-calendar.ista.ac.at/events/6167
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