Introduction to core-shell upconverting nanocrystals and their structure–property relationships
25 October 2019
UAntwerp, Campus Groenenborger, Room U.408 - Groenenborgerlaan 171 - 2020 antwerpen (route: UAntwerpen, Campus Groenenborger
11:30 AM - 12:15 PM
Organization / co-organization:
Friday Lecture by Damien Hudry, Karlsruhe Institute of Technology
The production of upconverting nanostructures with tailored optical properties is of major technological interest, and rapid progress toward the realization of such production has been made in recent years. Ultimately, detailed understanding of nanostructure organization will lead to design rules for accurately tailoring optical properties. In this presentation, the context of open questions in the field of upconverting nanocrystals will be presented, with a particular emphasis on the structure–property relationships of single- and multi-shell architectures. Although the optical properties of the latter have been thoroughly investigated, little is known regarding their atomic-scale organization. Indeed, solving the atomic-scale structure of such nanomaterials is challenging because of their intrinsic non-periodic nature.
Familiar concepts of crystallography are no longer appropriate; chemical and structural modulation waves must be introduced. To reveal the atomic-scale organization of such complex structures, innovative characterization techniques need to be applied and developed. The continued development and application of structural characterization techniques will be vital to consolidate the currently incomplete link between atomic-scale structure and upconversion properties. This will ultimately provide a valuable contribution to the emerging detailed guidelines on how to better design upconverting nanostructures to achieve given optical properties in terms of efficiency, absorption, spectral emission, and dynamics.