2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
Seven Nobel Laureates have already confirmed their attendance: Prof. Dan Shechtman, Prof. Sir Fraser Stoddart, Prof. Andre Geim, Prof. Thomas Steitz, Prof. Ada Yonath, Prof. Kurt Wüthrich and Prof. Ferid Murad. More than 400 Abstracts Submitted from about 60 Countries.
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    Plasmonic Semiconductor Nanocrystals as Multifunctional Materials
    Pavle Radovanovic1;
    1UNIVERSITY OF WATERLOO, Waterloo, Canada;
    PAPER: 380/AdvancedMaterials/Keynote (Oral)
    SCHEDULED: 17:40/Wed./Guaratiba (60/2nd)



    ABSTRACT:
    Synthesis, properties, and applications of plasmonic nanostructures with tunable localized surface plasmon resonance (LSPR) have been a subject of intense investigation over the past decade. Unlike typical metal nanoparticles, colloidal plasmonic semiconductor nanocrystals have LSPR frequencies tunable in the near- to mid-infrared region, which can potentially allow for their applications in terahertz imaging, heat-responsive devices and surface-enhanced infrared spectroscopic techniques [1]. Furthermore, the ability to control type and concentration of charge carriers, as well as their activation, trapping, and scattering via nanocrystal composition and/or surface chemistry allows for fine tuning of the energy, band width, and quality factor of LSPR in semiconductor nanocrystals. Besides expanding the LSPR range, semiconductor nanocrystals bring about numerous other opportunities related to single-phase plasmon-exciton interactions. However, non-resonant nature of the LSPR and exciton in semiconductor nanocrystals has been a major obstacle toward realizing such opportunities. This talk will first introduce the general properties of colloidal plasmonic semiconductor nanocrystals and compare them with those of noble metal nanoparticles. Then, various ways of generating and controlling the type, concentration, and mobility of charge carriers in these materials [2] will be reviewed. The second part of the talk will focus on the results of our recent work on structure and composition dependent plasmonic properties of transparent metal oxide nanocrystals [3,4], and particularly on generating robust electron polarization in degenerately-doped In<sub>2</sub>O<sub>3</sub> nanocrystals owing to non-resonant magnetic-field-induced plasmon-exciton coupling [5]. Applications of these materials for photocatalysis, solar energy conversion, and new energy-efficient and sustainable electronic and quantum information technologies will also be discussed. The talk will conclude with general outlook, and future research directions.

    References:
    [1] Comin, A.; Manna, L. Chem. Soc. Rev. 2014, 43, 3957-3975.
    [2] Runnerstrom, E. L.; Bergerud, A.; Agrawal, A.; Johns, R. W.; Dahlman, C. J.; Singh, A.; Selbach, S. M.; Milliron, D. J. Nano Lett. 2016, 16, 3390-3398.
    [3] Wang, T.; Radovanovic, P. V. J. Phys. Chem. C 2011, 115, 406-413.
    [4] Fang, H.; Hegde, M.; Yin, P.; Radovanovic, P. V. Chem. Mater. 2017, 29, 4970-4979.
    [5] Yin, P.; Tan, Y.; Fang, H.; Radovanovic, P. V. Nat. Nanotechnol. 2018, 13, 463-467.