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Symposium 1: Functional Metastructures and Nanomaterials: Properties, Fabrication and Modeling II

14:00 Invited talk : Single-Particle Absorption Spectroscopy of Plasmonic Nanostructures

Stephan Link

Rice University (USA)

Single-particle absorption spectroscopy on strongly scattering plasmonic nanoparticles is investigated by photothermal microscopy with a supercontinuum laser. The absorption spectra are compared to scattering spectra of the same individual gold nanoparticles and correlated with electron microscopy images that characterize the size and shape of the nanostructures. For many applications of plasmonic nanostructures, absorption and scattering cross sections and lineshapes are important to distinguish, possible with single-particle spectroscopy that also removes nanoparticle heterogeneity.
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14:20 Invited talk : Hybrid optical-thermal nanoantennas for enhanced light focusing and radiative cooling

Svetlana V. Boriskina, Lee A. Weinstein, Wei-Chun Hsu, Jonathan Tong, Gang Chen

MIT (USA)

Metal nanoantennas supporting localized surface plasmon resonances have become an indispensable tool in bio(chemical) sensing and nanoscale imaging applications. However, the high plasmon-enhanced electric field intensity in the visible or near-IR range that enables the above applications also causes excessive heating of metal. I will discuss the design of hybrid optical-thermal nanoantennas that simultaneously enable intensity enhancement at the operating wavelength in the visible and reduction of the operating temperature via a combination of reduced absorption and radiative cooling.
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14:40 Invited talk : Lithographic Gold/Polymer Nanorods as Efficient Thermoswitchable Plasmonic Systems for Environmental Sensing Applications

Nordin Felidj (1),M. Nguyen (1),X. Sun (1),E. Lacaze (2),C. Mangeney (1)

(1)University of Paris Diderot (France) , (2)UPMC (France)

We introduce a novel kind of hybrid plasmonic core-shell systems made of lithographic gold nanorods, coated by a thermosensitive polymer shell based on poly(N-isopropylacrylamide). We show that the optical response of the plasmonic hybrid structures is strongly modified upon a variation of the external temperature, due to a physical change of the conformation of the polymer coating. This work provides an important step towards the use of hybrid structures for applications, from nanoscale adhesion to molecular sensing.
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15:00 Invited talk : Active 3D plasmonics

Na Liu

the Max Planck Institute for Intelligent Systems (Germany)

Active control of three-dimensional configuration is one of the key steps towards smart plasmonic nanostructures with desired functionalities. We lay out a multi-disciplinary strategy to create active 3D plasmonic nanostructures, which execute DNA-regulated conformational changes on the nanoscale.
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15:20 Invited talk : DNA-based functional plasmonic particle assemblies

Tim Liedl

Ludwig Maximilians Universitat (Germany)

DNA self-assembly and in particular DNA origami are powerful tools to build complex arrangements of nanoparticles with nanometer positioning accuracy. The DNA-supported structures assemble at high yields and exhibit designed optical properties such as circular dichroism and electric and magnetic resonances.
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15:40 Invited talk : Multi-Functional Near-Infrared Excited Nanoparticles: Harvesting Light for Growing Applications in Biology

Fiorenzo Vetrone

Quebec University (Canada)

This paper presents the synthesis and surface functionalization of near-infrared excited and emitting nanoparticles and demonstrates their potential in multi-functional hybrid nanoplatforms for biological applications.
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