Malina Seyffertitz

Role of water for ion electrosorption at charged interfaces

Beamtime at the D22 instrument at the Institut Laue-Langevin ILL in Grenoble, France.

Malina Seyffertitz (main proposer) and Sebastian Stock conducted in-situ small angle neutron scattering experiments to explore the role of water for ion electrosorption at charged interfaces (March 2023)

Development and characterization of new low-cost intermetallic titanium aluminide alloys for advanced environmental-friendly propulsion systems

Nova Rock Festival

Max Rauscher, Sebastian Stock, and Malina Seyffertitz from the Chair of Physics recently participated in the "Montanuniversität Wissens-Line-Up" at Nova Rock Festival from 07.06.-10.06.2023. Together with other scientists and PhD students from Monanuniversität Leoben, they showcased their research interests in an unconventional setting, exploring new ways for science communication and outreach. This unique approach of information transfer was met with enthusiasm from both festival-goers and our researchers, affirming the resounding message that "Science rocks! ? " For more information, visit: https://www.unileoben.ac.at/sommer-line-up/

Publications

Are SAXS and SANS suitable to extract information on the role of water for electric-double-layer formation at the carbon–aqueous-electrolyte interface?

This study reports on the applicability of X-ray transmission (XRT), small- and wide-angle X-ray scattering (SAXS/WAXS) and small-angle neutron scattering (SANS) for investigating fundamental processes taking place in the working electrode of an electric double-layer capacitor with 1 M RbBr aqueous electrolyte at different applied potentials. XRT and incoherent neutron scattering are employed to determine global ion- and water-concentration changes and associated charge-balancing mechanisms. We showcase the suitability of SAXS and SANS, respectively, to get complementary information on local ion and solvent rearrangement in nanoconfinement, but also underscore the limitations of simple qualitative models, asking for more quantitative descriptions of water–water and ion–water interactions via detailed atomistic modelling approaches

Optimizing surfactant removal from a soft-templated ordered mesoporous carbon precursor: an in situ SAXS study

M.V. Rauscher , Malina Seyfertitz J. Appl. Cryst. (2023). 56, 801-809 / SyNergy_Mat Lab

In situ small-angle X-ray scattering (SAXS) was employed to identify critical parameters during thermal treatment for template removal of an ordered mesoporous carbon precursor synthesized via a direct soft-templating route. The structural parameters obtained from the SAXS data as a function of time were the lattice parameter of the 2D hexagonal structure, the diameter of the cylindrical mesostructures and a power-law exponent characterizing the interface roughness. Moreover, detailed information on contrast changes and pore lattice order was obtained from analysis of the integrated SAXS intensity of the Bragg and diffuse scattering separately. Five characteristic regions during heat treatment were identified and discussed regarding the underlying dominant processes. The influence of temperature and O₂/N₂ ratio on the final structure was analyzed, and parameter ranges were identified for an optimized template removal without strongly affecting the matrix. The results indicate that the final structure and controllability of the process are optimum for temperatures between 260 and 300°C with a gas flow containing 2 mol% of O₂.

SyNergy_Mat Lab

DI Malina Seyffertitz

University Assistant

E-Mail: malina.seyffertitz@unileoben.ac.at
Phone: +43 3842402 4622
Address: Office 15A, Franz Josef-Straße 18, A-8700 Leoben, Austria

My PhD research focuses on understanding the role of water for electric double layer formation, particularly in the context of supercapacitors. I use electrochemical characterization in combination with advanced in-situ scattering techniques such as anomalous small-angle x-ray and small-angle neutron scattering at large-scale facilities. My research interests also include nanoporous materials synthesis and characterization. Alongside my research, I am passionate about science communication and outreach, and enjoy being involved with teaching in the courses 'STEM-Physics', 'Physics 1 VU', and 'Physics 2 VU'.

Education:

01/2021 to date:
Doctoral Studies at the Chair of Physics at Montanuniversitaet Leoben, Austria.
Working title of the PhD thesis “The role of water for ion electrosorption at charged interfaces”.
10/2015-12/2020:
Bachelor and Masters Studies in Materials Science at Montanuniversitaet Leoben, Austria.
Master thesis at the Chair of Physical Metallurgy on ‘Development and characterization of new low-cost intermetallic titanium aluminide alloys for advanced environmental-friendly propulsion systems’.
2007-2015:
High School BRG Körösistraße, Graz, Austria.

NESY '24 Young Scientist Award

MalinaNEsyAward — BEST LECTURE: Malina Seyffertitz from the Chair of Physics, MU Leoben with the talk entitled: In-situ SAXS investigation of a supercapacitor using conductive metal-organic framework electrodes with ordered cylindrical microporosity and aqueous electrolytes

MaxRauscherNESYaward — BEST POSTER : Max Rauscher from the Chair of Physics, MU Leoben with the poster entitled:Dynamics of capacitive water deionization from in operando SAXS using synchrotron radiation

Faraday Discussion – Water at Interfaces, London, UK

From September 20^th to 22^nd, Malina Seyffertitz participated in the Water at Interfaces Faraday Discussion, which was organized by the Royal Society of Chemistry in London, UK.

During this event, Malina Seyffertitz presented her recent publication “Are SAXS and SANS suitable to extract information on the role of water for electric-double-layer formation at the carbon–aqueous-electrolyte interface?”. As customary at Faraday Discussions, the presentation was followed by an engaging and in-depth question-and-answer session, which led to a productive and insightful discussion. The publication and the parts of the ensuing discussion can be accessed under: pubs.rsc.org/en/content/articlelanding/2023/fd/d3fd00124e

Gordon Research Conference on Chemistry and Physics of Liquids in Holderness, New Hampshire (USA)

From July 29^th to August 4^th, Malina Seyffertitz took part in the Gordon Research Seminar and Conference (https://www.grc.org/chemistry-and-physics-of-liquids-conference/2023/) held in Holderness, New Hampshire (USA). During this event, she shared her latest research findings on "Investigating Aqueous Electrolytes in Nanoconfinement at Charged Interfaces Using In-Situ Small Angle X-Ray Scattering (SAXS) and Small Angle Neutron Scattering (SANS)" through a poster presentation. The conference served as a valuable forum for scientific discourse and the interchange of ideas, fostering opportunities for potential future collaborations.

2nd Symposium on Hydrogen and Carbon

The 2^nd Symposium on Hydrogen and Carbon (H₂-C), organized by Robert Obernaus-Emler (Resources Innovation Center) and the Rectorate of the Montanuniversität Leoben within the frame of the Strategic Core Research Area (SCoReA+) Hydrogen & Carbon, took place on July 10^th – 11^th at CCD of Voestalpine Donawitz in Leoben. Sebastain Stock delivered a talk, while Max Rauscher and Malina Seyffertitz presented their findings through posters to an audience of approximately 100 participants from Montanuniversität Leoben as well as industrial partners such as Voestalpine, RAG and OMV.

The Condensed Matter Physics and Chemistry (CMPC) workshop, Hamburg

The Condensed Matter Physics and Chemistry (CMPC) workshop features talks from invited speakers in each session and is a research association bringing together different communities working in the field of nanomaterials using X-ray scattering techniques. Malina Seyffertitz was invited to deliver a talk about her recent research on "In-situ small angle X-ray and neutron scattering from the working electrode in electric double layer capacitors" at this years CMPC workshop, which was held in Hamburg, Germany, from May 22 to May 23, 2023.

ÖPG Best Poster Prize

September 2022: Malina Seyffertitz was awarded the "Best Poster Prize" at the 71st Annual Meeting of the Austrian Physical Society (ÖPG-Tagung) held from 26th to 30th September 2022 in Leoben. The poster featured first results of a study using in-situ neutron small angle scattering on the working electrode of electric double layer capacitors during the charging and discharging conducted at the Institute Laue-Langevin in Grenoble, France.

Otto Kratky Award 2022.

September 2022: Malina Seyffertitz has been awarded the Otto Kratky Award 2022. This award is given every three years to a person under the age of 35 for outstanding achievements in the field of small angle scattering. The award ceremony took place at the SAS2022, XVIII International Small Angle Scattering Conference, held from 11th to 16th September 2022 in Campinas, Brazil. In the awarded work, Malina Seyffertitz, together with Max Rauscher, investigated an important synthesis step of ordered mesoporous carbons using time-resolved in-situ Small Angle X-ray scattering at the synchrotron source ELETTRA in Trieste, Italy.

October 2022: Beamtime at the P62 SAXSMAT beamline at the German Electron-Synchrotron DESY in Hamburg, Germany. Malina Seyffertitz (main proposer), Mohammad Taha Honaramooz and Prof. Oskar Paris performed an in-situ anomalous small angle scattering investigation of supercapacitor working electrodes to investigate charging and discharging dynamics

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