PRESENTATION BY Dr Evgeny Smirnov, Laboratory of Physical and Analytical Electrochemistry (LEPA), École Polytechnique Fédérale de Lausanne (EPFL), Switzerland.
PRESENTATION TITLE Assemblies of Gold Nanoparticles at Liquid-liquid Interfaces: From Liquid Optics to Electrocatalysis.
The interface between two immiscible liquids, i.e. oil and water, is an extremely attractive scaffold to self-assemble nanoparticles (NP) in arranged films. Such interfaces are defect-free and pristine by nature (facilitating reproducibly) and transparent (advantageous for optical applications).
Furthermore, they exhibit self-healing (allowing correction of self-assembly errors) as well as mechanical flexibility (permitting planar, curved or 3D deformations). Recently, LEPA proposed a novel tetrathiafulvalene (TTF)-assisted method that leads to self-assembly of gold nanoparticles into cm-scale nanofilms or, so-called, metal liquid-like droplets (MeLLDs). This talk will summarise key findings of LEPA’s MeLLDs investigation and primarily outline:
- How to self-assemble gold nanoparticles at liquid-liquid interface with a redox active promoter such as TTF;
- The interesting and useful properties such as optical, electrochemical and electrocatalytical properties that these assemblies possess;
- A perspective on emerging applications: fast one-step preparation of colloidosomes, SERS systems for biphasic analyte detection, Marangoni-type shutters driven by an electric field.
ABOUT THE PRESENTER Dr Evgeny Smirnov received his M.Sc. degree from Lomonosov Moscow State University, Russia, with emphasis on materials chemistry in 2011. He did his doctoral studies devoted to self-assembly of nanoparticles at liquid-liquid interfaces in the Laboratory of Physical and Analytical Electrochemistry at EPFL, Switzerland and successfully defended his Ph.D. degree in 2017. His scientific interests are mainly focused on the topic of settling gold nanoparticles at various liquid–liquid interfaces, investigation properties of such nanoparticle assemblies and implementation of them for redox catalysis at interfaces as well as for biphasic analyte detection in Raman spectroscopy. Full publication list is available at http://orcid.org/0000-0001-7930-7758.
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