BTU overview
Faculty 1
Chair of Applied Physics and Semiconductor Spectroscopy Prof. Dr. rer. nat. habil. Jan Ingo Flege

Meeting contributions 2025

MikroSystemTechnik Kongress 2025
October, 27-29, 2025, Duisburg

  • Bottom-up strategy to develop ultrathin active layers by atomic layer deposition for room temperature hydrogen sensors compatible with CMOS technology
    C. Morales, R. Tschammer, D. Guttmann, C. Alvarado Chavarin, C. Ruffert, K. Henkel, C. Wenger, J. I. Flege
    Poster, accepted
    Abstract

The 5th International Online Conference on Nanomaterials (IOCN 2025) 
September, 22-24, 2025, Online

  • XPS Analysis of Chemical Composition, Redox Mechanisms, and Deintercalation Pathways in Alluaudite-type Sodium Ion Battery Cathodes
    N. Imam, K. Henkel, A. Milewska, A. Budziak, W. Zając, M. Wolczko, J. Tobola, J. Molenda, J. I. Flege, E. Zschech
    Section »Synthesis, Characterization, and Properties of Nanomaterials«
    accepted
    Abstract

107thIUVSTA-ZCAM-UNIZAR Workshop »Oxides for Energy Applications: Bridging Experiment and Theory to Understand Functionality«
June 30 to July 4, 2025, Saragossa (Spain)

  • Growth dynamics and chemical reactivity in Sm-doped cerium oxide inverse catalytic model systems
    R. Sánchez-Barquilla, E. Pożarowska, B. Riedel, L. Pleines, L. Buß, T. O. Menteş, I. Cojocariu, A. Locatelli, V. Pérez-Dieste, J. Falta, C. Morales, J. I. Flege
    Invited Talk, Monday, 30.06.2025, 05:05 pm
    Abstract
  • From ALD growth to functional H2-sensors: the role of interface formation and recrystallization in the redox behavior of ALD-ceria
    C. Morales, R. Tschammer, Y. Kosto, C. Alvarado, C. Wenger, K. Henkel, J. I. Flege
    Invited Talk, Tuesday, 01.07.2025, 05:05 pm
    Abstract
  • Free-standing ultrathin metal-oxide membranes as electron transparent windows for studying gas-solid and liquid-solid interfaces at high pressures
    M. Gertig, A. Schubert, C. Alvarado, C. Wenger, J. I. Flege, C. Morales
    Invited Poster, Tuesday, 01.07.2025, 06:20 pm
    Abstract

  • Sm2O3 Nanoislands on Cu(111): Between Hexagons and Rectangles
    B. Riedel, R. Sánchez-Barquilla, L. Buß, I. Cojocariu, T. O. Mentes, A. Locatelli, J. I. Flege
    Invited Poster, Tuesday, 01.07.2025, 06:20 pm
    Abstract

  • Reducibility of Sm-doped ceria islands on Ru(0001)
    R. Sánchez-Barquilla, C. Morales, R. Tschammer, L. Buß, B. Riedel, D. Guttmann, V. Pérez-Dieste, T. O. Mentes, I. Cojocairu, M. Jugovac3, A. Locatelli, J. I. Flege
    Invited Poster, Tuesday, 01.07.2025, 06:20 pm
    Awarded with »Joint first poster prize«
    Abstract

25th International Conference on Atomic Layer Deposition (ALD 2025)
June, 22-25, 2025, Jeju Island (South Korea)

  • In-situ X-ray photoelectron spectroscopy for determining oxidation state, composition, and morphology of ALD-based CeOx, SnOx, and Ce1-xSnxOy deposits
    R. Tschammer, D. Guttman, M. Schmickler, A. Devi, K. Henkel, C. Morales, J. I. Flege
    Symposium »ALD Fundamentals« Session »Analysis«
    Talk AF1-TuA-8,  Tuesday, 26.06.2025, 03:15 pm
    Abstract

10th International Conference on Spectroscopic Ellipsometry (ICSE-10)
June 8-13, 2025, Boulder (USA)

  • Decoupling optical constants and morphology via in-situ X-ray photoelectron spectroscopy
    R. Tschammer, S. Peters, K. Henkel, C. Morales, J. I. Flege
    Talk C103, Tuesday, 10.06.2025, 08:45 am
    Awarded with »Outstanding Oral Presentation Award«
    Abstract

16th European Conference on Surface Crystallography and Dynamics and the 14th International Conference on the Structure of Surfaces (ECSCD-16/ICSOS-14)
June, 2-6, 2025, Vienna (Austria)

  • AQuaLEED: The first high-level automation of surface structure determination by IV-LEED
    J. Lachnitt, D. Mazur
    Talk, Thursday, 05.06.2025, 02:45 pm
    Abstract
  • Ultrathin NiO films on Ag(100): Understanding epitaxial growth using intensity-voltage low-energy electron diffraction
    J. Lachnitt, S. Das, K. S. R. Menon, J. I. Flege
    Poster, Tuesday, 03.06.2025, 06:35 pm
    Abstract

Annual Meeting on Reaction Engineering 2025
May, 26-28, 2025, Würzburg

  • Experimental and Numerical Analysis of Catalyst Form Influence on CO2-Methanation Reactor Performance
    E. Charlafti, F. Rachow, S. Liu, P. Bhattarai, V. Günther, R. Rakhi, F. Mauss, J. I. Flege
    Topic »Modeling and Diagnostics across Scales«
    Poster 52932, Monday, 26.05.2025, 05:30 pm
    Abstract

International Symposium on Green Chemistry (ISGC 2025)
May, 12-16, 2025, La Rochelle (France)

  • Ammonia cracking under high pressure conditions for a hydrogen fuel cell: reactor conditions and kinetics
    F. Rachow, V. Günther, F. Mauss
    Talk, Friday, 16.05.20225
    Abstract

Sensor and Measurement Science International (SMSI 2025)
May, 6-8, 2025, Nuremberg

  • In-Situ and Operando Measurements for the Characterization of Next-Generation Sensor Materials
    R. Tschammer, D. Guttmann, C. Morales, C. Tiebe, K. Henkel, J. I. Flege
    Poster, Wednesday, 07.05. 2025, 03:30 pm
    Abstract

ACS Spring Meeting 2025
March, 23-27, 2025, San Diego (USA)

  • Growth dynamics and in-situ chemical reactivity for CO2 activation in Sm-doped cerium oxide inverse catalytic model systems
    R. Sánchez-Barquilla, E. Pozarowska, B. Riedel, L. Pleines, L. Buß, T. O. Menteş, I. Cojocariu, A. Locatelli, V. Pérez-Dieste, J. Falta, C. Morales, J. I. Flege
    Invited Talk, Monday, 24.03.2025
    Abstract

DPG Spring Meeting of the Condensed Matter Section
March, 16-21, 2025, Regensburg

  • Hexagons on Rectangles: Epitaxial Graphene on Ru(\(10\bar{1}0\))
    L. Buß, G. Zamborlini, C. Sulaiman, M. Ewert, M. Cinchetti, J. Falta, J. I. Flege
    Part »O«, Topic »Graphene: Growth, structure and substrate interaction«
    Poster O 33.21, Tuesday, 18.03.2025, 01:30 pm, P3
    Abstract
    DPG Perma Link
  • Electron-transparent free-standing ultrathin membranes for studying gas-solid and liquid-solid interfaces at high pressures
    M. Gertig, C. Morales, A. Schubert, C. Alvarado, C. Wenger, J. I. Flege
    Part »DS«, Topic »Thin Film Applications«

    Talk DS 6.2, Wednesday, 19.03.2025, 09:45 pm, H3
    Abstract
    DPG Perma Link

  • Oxide growth and oxide/metal interaction in CeOx/Ni(111)
    D. Guttmann, R. Sánchez-Barquilla, C. Morales, J. I. Flege
    Part »O«, Topic »Heterogeneous catalysis«
    Talk O 41.1, Tuesday, 18.03.2025, 02:00 pm, H8
    Abstract
    DPG Perma Link
  • XPS study of redox mechanism in Na2.5-xFe1.75(SO4)3 cathode material for high-voltage sodium-ion batteries
    N. Imam, K. Henkel,  A. Milewska, J. Molenda, E. Zschech, J. I. Flege
    Part »CPP«, Topic »Energy Storage and Batteries«
    Talk CPP 16.3, Tuesday, 18.03.2025, 10:15 am, H34
    Abstract
    DPG Perma Link
  • Ultrathin NiO(100) films on Ag(100): Pitfalls in under-standing growth using intensity-voltage low-energy electron diffraction
    J. Lachnitt, S. Das, K. S. R. Menon, J. I. Flege
    Part »O«, Topic »Metal substrates: Structure, epitaxy and growth«
    Talk O 89.11, Thursday, 20.03.2025, 05:30 pm, H8
    Abstract
    DPG Perma Link
  • U-Ce charge transfer in epitaxial Ce1-xUxO2 films grown on Ru(0001): consequences for thermochemical water splitting
    C. Morales, R. Tschammer, T. Gouder, H. Idriss, J. I. Flege
    Part »O«, Topic »Heterogeneous catalysis«
    Talk O 32.7, Tuesday, 18.03.2025, 12:00 am, H25
    Abstract
    DPG Perma Link

  • Structural and chemical analysis of coexisting hexagoal and monoclinic phases of samarium oxide on Cu(111)
    B. Riedel, L. Buss, R. Sanchez-Barquilla, J. I. Flege
    Part »O«, Topic »Heterogeneous catalysis«
    Talk O 32.2, Tuesday, 18.03.2025, 10:45 am, H25
    Abstract
    DPG Perma Link

  • Reducibility of Sm-doped ceria islands on Ru(0001)
    R. Sanchez-Barquilla, R. Tschammer, L. Buss, C. Morales, J. I. Flege
    Part »O«, Topic »Heterogeneous catalysis«

    Talk O 81.6, Thursday, 20.03.2025, 11:45 am, H6
    Abstract
    DPG Perma Link

  • Composition and band gap of aluminum alloyed beta-gallium oxide determined by XPS
    L. Schewe, J. Rehm, M.-C. Kao, V. Vonk, Z. Galazka, S. Bin Anooz, A. Popp, J. I. Flege
    Part »O«, Topic »Electronic structure of surfaces: Spectroscopy, surface states«

    Talk O 86.8, Thursday, 20.03.2025, 04:45 pm, H2
    Abstract
    DPG Perma Link

  • In-situ growth and characterization of 2D TaSe2 on Au(111)
    C. Sulaiman, L. Buß, R. Sánchez-Barquilla, J. Falta, J. I. Flege
    Part »O«, Topic » 2D Materials beyond graphene: Growth, structure and substrate interaction«
    Talk O 14.11, Monday, 17.03.2025, 05:30 pm, H11
    Abstract
    DPG Perma Link
  • In-situ and operando characterization of atomic layer deposited SnO2 and SnO2/CeO2 heterostructures for gas sensing applications
    R. Tschammer, C. Morales, K. Henkel, J. I. Flege
    Part »DS«, Topic »Thin Film Properties: Structure, Morphology and Composition (XRD, TEM, XPS, SIMS, RBS, AFM, ...)«
    Talk DS 1.2, Monday, 17.03.2025, 09:45 am, H 3
    Abstract
    DPG Perma Link

58. Jahrestreffen Deutscher Katalytiker
March, 12-14, 2025, Weimar

  • CO2 methanation over Ni catalysts supported on CeO2 and CeSmOx: the influence of Sm addition
    S. Liu, F. Rachow, E. Charlafti, R. Sánchez-Barquilla, J. I. Flege, L. M. Gómez-Sainero, V. Cortés
    Topic: »CO2 as Building Block«
    Poster P12.01, Thursday, 13.03.2025, 02:30 pm
    Abstract