nanoparticle; nanopipette; electrocatalysis; scanning probe methods; electrochemistry; nanomanipulation
Schlotter Tilman, Weaver Sean, Forró Csaba, Momotenko Dmitry, Vörös János, Zambelli Tomaso, Aramesh Morteza (2020), Force-Controlled Formation of Dynamic Nanopores for Single-Biomolecule Sensing and Single-Cell Secretomics, in ACS Nano
, 14(10), 12993-13003.
Kfoury Georges, El Habbaki Vanessa, Malaeb Waddah, Weaver Sean, Momotenko Dmitry, Mhanna Rami (2020), Alginate Sulfate Substrates Control Growth Factor Binding and Growth of Primary Neurons: Toward Engineered 3D Neural Networks, in Advanced Biosystems
, 4(7), 2000047-2000047.
Holub Martin, Adobes-Vidal Maria, Frutiger Andreas, Gschwend Pascal M., Pratsinis Sotiris E., Momotenko Dmitry (2020), Single-Nanoparticle Thermometry with a Nanopipette, in ACS Nano
, 14(6), 7358-7369.
Ercolano Giorgio, van Nisselroy Cathelijn, Merle Thibaut, Vörös János, Momotenko Dmitry, Koelmans Wabe, Zambelli Tomaso (2020), Additive Manufacturing of Sub-Micron to Sub-mm Metal Structures with Hollow AFM Cantilevers, in Micromachines
, 11(1), 6-6.
Aramesh Morteza, Forró Csaba, Dorwling-Carter Livie, Lüchtefeld Ines, Schlotter Tilman, Ihle Stephan J., Shorubalko Ivan, Hosseini Vahid, Momotenko Dmitry, Zambelli Tomaso, Klotzsch Enrico, Vörös János (2019), Localized detection of ions and biomolecules with a force-controlled scanning nanopore microscope, in Nature Nanotechnology
, 14(8), 791-798.
Ercolano Giorgio, Zambelli Tomaso, van Nisselroy Cathelijn, Momotenko Dmitry, Vörös Janos, Merle Thibaut, Koelmans Wabe (2019), Multiscale Additive Manufacturing of Metal Microstructures, in Advanced Engineering Materials
Dorwling-Carter Livie, Aramesh Morteza, Han Hana, Zambelli Tomaso (2018), Combined Ion Conductance and Atomic Force Microscope for Fast Simultaneous Topographical and Surface Charge Imaging, in Analytical Chemistry
Current raise in worldwide energy consumption requires development of novel technologies and materials for efficient energy generation and storage. Key performance characteristics of modern nanomaterials for energy applications, such as electrocatalysts for fuel cells, cathodes for lithium-ion batteries and electrodes for solar cells, are determined by the fundamental physicochemical properties of the nanoscale entities (nanoparticles, reaction sites, defects), where chemical events mainly take place. Understanding materials’ behavior at a nanoscale, and at a single entity level, is therefore crucial for the design of the next generations of materials and technologies.This ambitious multidisciplinary project seeks new paradigms for probing, visualizing and manipulating nanoscale objects and particles with the use of positional nanopipettes, with further application of these advanced methodologies to study nanoelectrocatalysts. Nanopipette methods have recently shown their great potential for microscopy and imaging structural and functional properties, such as surface charge and chemical reactivity, with nanoscale resolution and unprecedented imaging rates, which puts them on the leading edge of the current development of scanning probe microscopy instrumentation. Here, significant advances of the current nanopipette techniques are proposed, with the goal to extend the capabilities of present methods and to convert a nanopipette into a powerful platform for manipulation of nanoobjects and for probing spatial distributions of heat. These novel experimental approaches would open up new perspectives on characterization of physicochemical nanoscale properties of single entities and will provide new insights on nanoscale electrocatalysis, presently inaccessible with conventional techniques.The objective of the project is twofold: i) imaging and manipulation of individual particles with sizes varying from a few nanometers (~5 nm) and up to tens of nanometers (depending on application) with nanometer-scale resolution and further examination of their physicochemical characteristics and performance for application as fuel cell catalysts; and ii) probing local temperature distributions in nanoscale environments on individual nanoparticles and assessment of their catalytic properties depending on temperature. In this project, nanoscale nanopipette imaging/manipulation concept will be developed using powerful potential of the scanning ion conductance microscopy. This nanoscale scanning probe technique will be advanced to perform dielectrophoretic and nanofluidic particle manipulation along with thermal imaging for the unique analysis of the physicochemical properties of nanomaterials. Accordingly, the project is structured into three tasks: i) construction of the cutting edge electrochemical imaging platform, ii) development of particle manipulation techniques based on nanopipettes and their applications to study particle-electrode collisions, particle adsorption, real-time monitoring chemical reactions on individual particles, weighting individual particles, study particle dissolution and surface processes, and iii) development of nanoscale thermal imaging technique to investigate the effects of local temperature on performance characteristics of nanoelectrocatalysts.The new methodologies that will develop in this project will be established, tested, modeled and used to study fundamentally and industrially significant interfaces and chemical reactions. Importantly, the project will be conducted in a highly collaborative environment of Eidgenössische Technische Hochschule Zurich (ETHZ), with the access to facilities of the excellent quality, and will amalgamate complementary expertise of the applicant and the Host Group (Laboratory of Biosensors and Bioelectronics), therefore ensuring the overall success of the research programme. It is further important to emphasize that the methods to be developed and used in this project will subsequently be widely applicable in many areas, spanning physical sciences, materials science, nanotechnology and across other disciplines, ensuring that this project has the potential for major multidisciplinary and interdisciplinary impact in fundamental and applied sciences, and will have wider academic, societal and economic impact.