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EACON 2020

EurAsian Conference on Nanophotonics

April 6 – 9, 2020 / Jena, Germany

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Maria Wächtler

Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, 07745 Jena, GERMANY
Institute of Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, 07743 Jena, GERMANY

Quantum confined semiconductor nanostructures in light-driven catalysis

Inorganic semiconductor nanocrystals are extremely potent and versatile materials for many photonic applications. Their high extinction coefficients and tunable (by means of size variation) absorption and emission characteristics render them ideal candidates as light-harvesters for photovoltaics and photocatalysis as well as active material in light-emitting diodes. In this talk, I will present our work on hybrid structures based on semiconductor nanocrytstals for light-driven catalysis. We are investigating the function determining light-driven processes in such structures leading to the targeted function by applying a combination of time-resolved spectroscopic techniques, i.e. photoluminescence and transient absorption spectroscopy. E.g., in metal nanoparticle functionalized CdSe@CdS dot-in-rod structures our investigations of the charge separation process at the semiconductor metal interface revealed the dependence of the efficiency of this process on the composition and size of the metal particle.[1,2] In recent work we focus on the functionalization of 0D (quantum dots) and 1D (nanorods) CdSe- and CdS-based particles with redoxactive molecules and potential molecular catalytic reaction centers. I will introduce results of our investigations on the light-driven charge transfer processes in these hybrid structures. Last but not least, we work on strategies for integration of quantum confined semiconductor nanocrystals in photoelectrode materials. For this purpose we explore strategies for the deposition of colloidal rod shaped particles at substrates with controlled orientation. 

Figure 1. Schematic representation of the functionalization of quantum dots with molecular catalytic reaction centers for light-driven hydrogen generation

References

  1. M. Wächtler, P. Kalisman, L. Amirav, J. Phys. Chem. C, 2016, 120, 24491-24497.
  2. Y. Nakibli, Y. Mazal, Y. Dubi, M. Wächtler, L. Amirav, Nano Lett., 2018, 18, 357-364.

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-Jung Lu

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