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EACON 2020

EurAsian Conference on Nanophotonics

April 6 – 9, 2020 / Jena, Germany

Volker Deckert

Leibniz Institute of Photonic Technology, Albert-Einstein-Str.9, 07745 Jena, Germany 

Plasmon Enhanced Probe Spectroscopies – Structural Investigation of Nanoscale Objects

Plasmon enhanced spectroscopies, life for instance tip-enhanced Raman spectroscopy TERS (but also tip-enhanced infrared absorption) allow to address structural information of surfaces with extreme lateral resolution. While fundamental aspects regarding the resolution properties are of particular interest, here we will focus on practical applications from chemistry and biology where lateral resolution is required. It will be demonstrated, that the high resolution / high sensitivity comes at the cost of only a low penetration depth. Consequently, either sample preparation must be adapted or a combination of different tools must be utilized to gain a full picture regarding the composition of organic or biological nanoparticles. As particularly the very surface layer will determine the chemical and physical properties, this layer is often of particular interest. As an example, we will show how the composition of polymer-based core-shell nano particles intended for cancer treatment can be revealed by high resolution Raman spectroscopy. In this specific case the approach to distinct be-tween core and shell was via sample preparation, specifically via sectioning of embedded polymer particles. In order to speed up the TERS experiment we will also demonstrate that the experiments can be coupled with force distance map-ping experiments that can even provide information whether the upper or lower part of a nano particle was sectioned (see Figure 1). The results will indicate a lateral resolution in the nanometer region which is quite surprising for such an inhomogeneous material a s a polymer, however in-line with the current theory concerning the high-resolution capabilities of tip-enhanced Raman scattering.

Figure 1. Schematic view on a Tip-enhanced Raman scattering experiment on embedded cryo sectioned core-shell nano particles. The plasmonic features at the very end of the tip allow for nanoscale lateral resolution once the tip is brought as close as a few Ångström distance to the sample.[1]


[1] see for instance: M. Richard-Lacroix et al., Chem. Soc. Rev 46, 3922 (2017)

Further Talks

Andrea Csáki

Microfludic Synthesis of plasmonic Nanoparticles for Sensing Applications

Andrey Turchanin

Controlled growth of transition metal dichalcogenide monolayers for applications in nanoelectronic and nanophotonic devices

Chi Chen

Near Field Spectroscopic Imaging: from Hard to Soft Materials

Chi-How Peng

Cobalt mediated controlled/living radical polymerization: from mechanism understanding to materials application

Chun-Hong Kuo

Bridging Energy and Chemistry via Nanoarchitectonic Engineering at Atomic Scale

Falk Eilenberger

Integration of two-dimensional materials in optical systems for nonlinear optics, sensing, and single photon sources

Frank Setzpfandt

Nonlinear frequency conversion in nanostructured optical systems for application in quantum photonics

Heng-Liang Wu

Controlling the Oxidation State of Cu Electrode and Reaction Intermediates for Electrochemical CO2 Reduction to Ethylene

Kien-Voon Kong

Direct Observation of Reaction Intermediates of Metal-based Therapeutic Agents in Single Living Cell Using TERS

Maria Wächtler

Quantum confined semiconductor nanostructures in light-driven catalysis

Martin Presselt

Supramolecular Control of Optical and Electronical Properties of Two-Dimensional Dye Layers

Po-Chiao Lin

New Environment Sensitive Fluorophores with Color-Tailored Emission: In Vivo Monitoring of Carbonic Anhydrases Expression on Growth of Larval Zebrafish

Shangjr (Felix) Gwo

Plasmonic Metasurface-Enhanced Linear and Nonlinear Processes in Two-Dimensional Semiconductors

Ta-Jen Yen

Empowering Bilayer MoS2 by Engineered Plasmonic Nanostructures for Optoelectronic Applications

Tiow-Gan Ong

Carbodicarbene, Carbogenic Maverick, Not a Moderate!

Volker Deckert

Plasmon Enhanced Probe Spectroscopies – Structural Investigation of Nanoscale Objects

Yi-Tsu Chan

Molecular self-assembly methodology for rational construction of metallosupramolecules with high structural complexity

Yian Tai

Toward a universal polymeric material for electrode buffer layers in organic optoelectronics

Yu-Chieh Cheng

Kirigami-based soft robots with light-responsive properties

Yu-Jung Lu

Controlling Light-matter Interactions at Nanoscale with Plasmonics: From Spontaneous Emission to Lasing