Microscopy of Nanoscale Structures & Mechanisms

MNM Team
Raum Tel. E-Mail
TT-Prof. Dr.-Ing. Yolita Eggeler Tenure-Track Professor of Electron Microscopy in Area 5 Bldg. 30.25, R. 215 +49 721 608 - 4 3724 yolita eggeler ∂does-not-exist.kit edu
M.Sc. Birger Holtermann PhD student Bldg. 30.25, R. 214 +49 721 608 - 4 3723 birger holtermann ∂does-not-exist.student kit edu
M.Sc. Kristian Kraft PhD student Bldg. 30.22, R. 210 +49 721 608 - 4 6489 kristian kraft ∂does-not-exist.kit edu
M.Sc. Zhongmin Long PhD student Bldg. 30.25, R. 214 +49 721 608 - 4 3723 zhongmin long ∂does-not-exist.kit edu
Schwartz, Arne
 Arne Schwartz Bachelorand Bldg. 30.48, R. 021 +49 721 608 - 4 3718 arne schwartz ∂does-not-exist.student kit edu
M.Sc. Qing Sun PhD student Bldg. 30.25, R. 217 +49 721 608 - 4 3740 qing sun ∂does-not-exist.kit edu
M.Sc. Hemanth Thota PhD student Bldg. 30.25, R. 217 +49 721 608 - 4 3740 hemanth thota ∂does-not-exist.kit edu

Insight into our work in the KIT Excellence Cluster 3DMM2O

The video shows the printing of microstructures and the examination of the samples in the scanning electron microscope (SEM). 3D microstructures are printed on a silicon chip by means of 2 photon polymerization. The further processing of the sample is done by drying by means of critical point drying. Subsequently, the sample can be attached to a SEM suitable sample holder and examined in the electron microscope. Three different printed structures are shown in the video, which will be examined in the future with regard to influencing factors such as pressure and temperature, after a pyrolysis process. Finally, the sample is prepared for the transmission electron microscope (TEM), inserted into the sample holder and introduced into the TEM.

 

Research areas

We are curios to understand how nano- and microstructures of materials form during processing and service and how they affect structural and functional properties. We presently work on single crystal superalloys (SX), high entropy alloys (HEA), functional magnetic Heusler and half Heusler (H/hH) compounds and new small-scale nano and micro engineered systems (excellence cluster 3DMM2O) on the atomic (crystals) respectively molecular (soft matter) scale.

Electron microscopy enables us to dive in into the nano-cosmos of materials and to discover yet unknown fundamental processes and materials phenomena.

Thus, we are fascinated

  • to see how plastic deformation unfolds in microstructures of high-performance metallic materials, where we aim at understanding the role of dislocations, planar faults and solute segregation to these crystal defects.
  • to directly observe solid state reactions like phase decompositions and coarsening processes in multiphase materials on the nanoscale and to explore how these processes affect functional and structural properties.
  • to explore which nano- and microstructural configurations rationalize magnetic properties and how these can be optimized.
  • to characterize Metal Organic Frameworks (MOF), to study their synthesis and to explore possible nanoscale applications.

Our group closely collaborates with national and international research partners.

Please contact us in case you are interested to collaborate. We always welcome suggestions for collaborations and our group represents a fruitful scientific environment for postdoctoral researchers from all over the world. (applications welcome)

We are looking forward to hearing from you.

Yolita M. Eggeler, and all members of the MNM-group at LEM


Publications


Raw Data to "The Creep-induced Micro- and Nanostructural Evolution of a Eutectic Mo-Si-Ti Alloy at 1200 °C"
Schliephake, D.; Thota, H.; Kauffmann, A.; Wu, H.; Pundt, A.; Heilmaier, M.; Eggeler, Y. M. M.
2024, March 28. doi:10.35097/UevKjgWEpsUxGdfh 
The Creep‐induced Micro‐ and Nanostructural Evolution of a Eutectic Mo‐Si‐Ti Alloy at 1200 °C
Schliephake, D.; Thota, H.; Kauffmann, A.; Wu, H.; Pundt, A.; Heilmaier, M.; Eggeler, Y. M.
2024. Advanced Engineering Materials. doi:10.1002/adem.202301909 
Microarchitected Compliant Scaffolds of Pyrolytic Carbon for 3D Muscle Cell Growth
Taale, M.; Schamberger, B.; Monclus, M. A.; Dolle, C.; Taheri, F.; Mager, D.; Eggeler, Y. M.; Korvink, J. G.; Molina-Aldareguia, J. M.; Selhuber-Unkel, C.; Lantada, A. D.; Islam, M.
2024. Advanced Healthcare Materials. doi:10.1002/adhm.202303485 Full textFull text of the publication as PDF document 
Development of Refractory Metal-based CCAs with Improved Mechanical Properties
Laube, S.; Schellert, S.; Kauffmann, A.; Gorr, B.; Eggeler, Y. M.; Christ, H.-J.; Heilmaier, M.
2023, November 13. 3rd World Congress on High Entropy Alloys (HEA 2023), Pittsburgh, PA, USA, November 12–15, 2023 
Hexagonal Hybrid Bismuthene by Molecular Interface Engineering
Dolle, C.; Oestreicher, V.; Ruiz, A. M.; Kohring, M.; Garnes-Portolés, F.; Wu, M.; Sánchez-Santolino, G.; Seijas-Da Silva, A.; Alcaraz, M.; Eggeler, Y. M.; Spiecker, E.; Canet-Ferrer, J.; Leyva-Pérez, A.; Weber, H. B.; Varela, M.; Baldoví, J. J.; Abellán, G.
2023. Journal of the American Chemical Society, 145 (23), 12487–12498. doi:10.1021/jacs.2c13036 Full textFull text of the publication as PDF document 
Electrical Conductivity and Photodetection in 3D‐Printed Nanoporous Structures via Solution‐Processed Functional Materials
Xia, K.; Dong, Z.; Sun, Q.; Debastiani, R.; Liu, S.; Jin, Q.; Li, Y.; Paetzold, U. W.; Gumbsch, P.; Lemmer, U.; Eggeler, Y. M.; Levkin, P. A.; Hernandez-Sosa, G.
2023. Advanced Materials Technologies, 8 (23), Art.Nr.: 2300408. doi:10.1002/admt.202300408 Full textFull text of the publication as PDF document 
Inducing skyrmion flop transitions in CoZnMn at room temperature
Meynell, S. A.; Eggeler, Y. M.; Bocarsly, J. D.; Kitchaev, D. A.; Rhodes, B. E.; Pollock, T. M.; Wilson, S. D.; Van der Ven, A.; Seshadri, R.; De Graef, M.; Jayich, A. B.; Gianola, D. S.
2023. Physical Review Materials, 7 (4), Art.-Nr.: 044401. doi:10.1103/PhysRevMaterials.7.044401 
Mechanical response of pesting-resistant Mo-Si-Ti alloys for high temperature applications
Kauffmann, A.; Schliephake, D.; Obert, S.; Tirunilai, A. S.; Hinrichs, F.; Winkens, G.; Wu, H.; Thota, H.; Eggeler, Y.; Mücklich, F.; Engstler, M.; Gorr, B.; Heilmaier, M.
2023, January 6. International Conference on Plasticity, Damage, and Fracture (ICPDF 2023), Punta Cana, Dominican Republic, January 3–9, 2023 
Disulfide‐Bridged Dynamic Covalent Triazine Polymer Thin Films by Interface Polymerization: High Refractive Index with Excellent Optical Transparency
Begum, S.; Kutonova, K.; Mauri, A.; Koenig, M.; Chan, K. C.; Sprau, C.; Dolle, C.; Trouillet, V.; Hassan, Z.; Leonhard, T.; Heißler, S.; Eggeler, Y. M.; Wenzel, W.; Kozlowska, M.; Bräse, S.
2023. Advanced Functional Materials, Art.-Nr.: 2303929. doi:10.1002/adfm.202303929 Full textFull text of the publication as PDF document 
Inkjet‐Printed Tungsten Oxide Memristor Displaying Non‐Volatile Memory and Neuromorphic Properties
Hu, H.; Scholz, A.; Dolle, C.; Zintler, A.; Quintilla, A.; Liu, Y.; Tang, Y.; Breitung, B.; Marques, G. C.; Eggeler, Y. M. M.; Aghassi-Hagmann, J.
2023. Advanced Functional Materials, Art.Nr.: 2302290. doi:10.1002/adfm.202302290 Full textFull text of the publication as PDF document 
In Situ Pyrolysis of 3D Printed Building Blocks for Functional Nanoscale Metamaterials
Sun, Q.; Dolle, C.; Kurpiers, C.; Kraft, K.; Islam, M.; Schwaiger, R.; Gumbsch, P.; Eggeler, Y. M. M.
2023. Advanced Functional Materials. doi:10.1002/adfm.202302358 Full textFull text of the publication as PDF document 
Formation and thermal stability of two-phase microstructures in Al-containing refractory compositionally complex alloys
Kauffmann, A.; Laube, S.; Schellert, S.; Seils, S.; Tirunilai, A. S.; Greiner, C.; Eggeler, Y.; Gorr, B.; Christ, H.-J.; Heilmaier, M.
2023. International Conference on Processing & Manufacturing of Advanced Materials : Processing, Fabrication, Properties, Applications (Thermec 2023), Vienna, Austria, July 2–7, 2023 
A Review on 3D Architected Pyrolytic Carbon Produced by Additive Micro/Nanomanufacturing
Eggeler, Y. M.; Chan, K. C.; Sun, Q.; Lantada, A. D.; Mager, D.; Schwaiger, R.; Gumbsch, P.; Schröder, R.; Wenzel, W.; Korvink, J. G.; Islam, M.
2023. Advanced Functional Materials, Art.-Nr.: 2302068. doi:10.1002/adfm.202302068 Full textFull text of the publication as PDF document 
High‐Sensitivity Flexible Thermocouple Sensor Arrays Via Printing and Photonic Curing
Mallick, M. M.; Franke, L.; Rösch, A. G.; Hussein, M.; Long, Z.; Eggeler, Y. M.; Lemmer, U.
2023. Advanced Functional Materials, Art.-Nr.: 2301681. doi:10.1002/adfm.202301681 Full textFull text of the publication as PDF document 
Electrospun carbon nanofibre-assisted patterning of metal oxide nanostructures
Islam, M.; Dolle, C.; Sadaf, A.; Weidler, P. G.; Sharma, B.; Eggeler, Y. M.; Mager, D.; Korvink, J. G.
2022. Microsystems & Nanoengineering, 8 (1), Art.Nr. 71. doi:10.1038/s41378-022-00409-8 Full textFull text of the publication as PDF document 
Improved work hardening capability and ductility of an additively manufactured and deformed Al-Mn-Mg-Sc-Zr alloy
Schliephake, D.; Lopes, C.; Eggeler, Y. M.; Chen, H.; Freudenberger, J.; Bayoumy, D.; Huang, A. J.; Kauffmann, A.
2022. Journal of Alloys and Compounds, 924, Artkl.Nr.: 166499. doi:10.1016/j.jallcom.2022.166499 Full textFull text of the publication as PDF document 
A novel nitridation- and pesting-resistant Cr-Si-Mo alloy
Hinrichs, F.; Kauffmann, A.; Tirunilai, A. S.; Schliephake, D.; Beichert, B.; Winkens, G.; Beck, K.; Ulrich, A. S.; Galetz, M. C.; Long, Z.; Thota, H.; Eggeler, Y.; Pundt, A.; Heilmaier, M.
2022. Corrosion Science, 207, Art.-Nr.: 110566. doi:10.1016/j.corsci.2022.110566 Full textFull text of the publication as PDF document 
Solid and Hollow Poly(p-xylylene) Particles Synthesis via Metal–Organic Framework-Templated Chemical Vapor Polymerization
Begum, S.; Behboodi-Sadabad, F.; Pramudya, Y.; Dolle, C.; Kozlowska, M.; Hassan, Z.; Mattern, C.; Gorji, S.; Heißler, S.; Welle, A.; Koenig, M.; Wenzel, W.; Eggeler, Y. M.; Bräse, S.; Lahann, J.; Tsotsalas, M.
2022. Chemistry of Materials, 34 (14), 6268–6278. doi:10.1021/acs.chemmater.2c00111 Full textFull text of the publication as PDF document 
Metal–Metal Bonding as an Electrode Design Principle in the Low-Strain Cluster Compound LiScMo 3 O 8
Wyckoff, K. E.; Kaufman, J. L.; Baek, S. W.; Dolle, C.; Zak, J. J.; Bienz, J.; Kautzsch, L.; Vincent, R. C.; Zohar, A.; See, K. A.; Eggeler, Y. M.; Pilon, L.; Van der Ven, A.; Seshadri, R.
2022. Journal of the American Chemical Society, 144 (13), 5841–5854. doi:10.1021/jacs.1c12070 
Photonic Curing Enables Ultrarapid Processing of Highly Conducting β-CuSe Printed Thermoelectric Films in Less Than 10 ms
Mallick, M. M.; Franke, L.; Rösch, A. G.; Geßwein, H.; Eggeler, Y. M.; Lemmer, U.
2022. ACS Omega, 7 (12), 10695–10700. doi:10.1021/acsomega.2c00412 
Ultra-flexible β-Cu2-δSe-based p-type printed thermoelectric films
Mallick, M. M.; Sarbajna, A.; Rösch, A. G.; Franke, L.; Geßwein, H.; Eggeler, Y. M.; Lemmer, U.
2022. Applied materials today, 26, Art.Nr. 101269. doi:10.1016/j.apmt.2021.101269 
A novel pesting and nitridation resistant Mo-Si-Cr alloy
Hinrichs, F.; Kauffmann, A.; Tirunilai, A. S.; Schliephake, D.; Beichert, B.; Winkens, G.; Beck, K.; Ulrich, S. A.; Galetz, M. C.; Long, Z.; Thota, H.; Eggeler, Y.; Pundt, A.; Heilmaier, M.
2022. Materials Science and Engineering Congress (MSE 2022), Darmstadt, Germany, September 27–29, 2022 
Formation and thermal stability of two-phase microstructures in Al-containing refractory compositionally complex alloys
Laube, S.; Kauffmann, A.; Schellert, S.; Seils, S.; Tirunilai, A. S.; Greiner, C.; Eggeler, Y. M.; Gorr, B.; Christ, H.-J.; Heilmaier, M.
2022. Science and Technology of Advanced Materials, 23 (1), 692–706. doi:10.1080/14686996.2022.2132118 Full textFull text of the publication as PDF document 
High Figure‐of‐Merit Telluride‐Based Flexible Thermoelectric Films through Interfacial Modification via Millisecond Photonic‐Curing for Fully Printed Thermoelectric Generators
Mallick, M. M.; Franke, L.; Rösch, A. G.; Geßwein, H.; Long, Z.; Eggeler, Y. M.; Lemmer, U.
2022. Advanced Science, 9 (31), Art.Nr.: 2202411. doi:10.1002/advs.202202411 Full textFull text of the publication as PDF document 
Realizing High Thermoelectric Performance of Bi-Sb-Te-Based Printed Films through Grain Interface Modification by an In Situ-Grown β-Cu2-δSe Phase
Mallick, M. M.; Franke, L.; Rösch, A. G.; Ahmad, S.; Geßwein, H.; Eggeler, Y. M.; Rohde, M.; Lemmer, U.
2021. ACS applied materials & interfaces, 13 (51), 61386–61395. doi:10.1021/acsami.1c13526 Full textFull text of the publication as PDF document 
Disordered interfaces enable high temperature thermal stability and strength in a nanocrystalline aluminum alloy
Balbus, G. H.; Kappacher, J.; Sprouster, D. J.; Wang, F.; Shin, J.; Eggeler, Y. M.; Rupert, T. J.; Trelewicz, J. R.; Kiener, D.; Maier-Kiener, V.; Gianola, D. S.
2021. Acta materialia, 215, Art.-Nr.: 116973. doi:10.1016/j.actamat.2021.116973 
Precipitate Shearing, Fault Energies, and Solute Segregation to Planar Faults in Ni-, CoNi-, and Co-Base Superalloys
Eggeler, Y. M.; Vamsi, K. V.; Pollock, T. M.
2021. Annual review of materials research, 51 (1), 209–240. doi:10.1146/annurev-matsci-102419-011433 
Influence of plastic deformation on the magnetic properties of Heusler MnAuAl
Levin, E. E.; Kitchaev, D. A.; Eggeler, Y. M.; Mayer, J. A.; Behera, P.; Gianola, D. S.; Van der Ven, A.; Pollock, T. M.; Seshadri, R.
2021. Physical review materials, 5 (1), Art.-Nr.: 014408. doi:10.1103/PhysRevMaterials.5.014408 
Intrinsic nano-diffusion-couple for studying high temperature diffusion in multi-component superalloys
Eggeler, Y. M.; Kubacka, D.; Pichler, P.; Wu, M.; Spiecker, E.
2021. Scripta materialia, 192, 120–124. doi:10.1016/j.scriptamat.2020.10.002 Full textFull text of the publication as PDF document 
Design of Nickel-Cobalt-Ruthenium multi-principal element alloys
Charpagne, M. A.; Vamsi, K. V.; Eggeler, Y. M.; Murray, S. P.; Frey, C.; Kolli, S. K.; Pollock, T. M.
2020. Acta materialia, 194, 224–235. doi:10.1016/j.actamat.2020.05.003 
Interfacial structure and strain accommodation in two-phase Nb Co Sn Heusler intermetallics
Eggeler, Y. M.; Levin, E. E.; Wang, F.; Kitchaev, D. A.; Van der Ven, A.; Seshadri, R.; Pollock, T. M.; Gianola, D. S.
2020. Physical review materials, 4 (9), Art.-Nr.: 093601. doi:10.1103/PhysRevMaterials.4.093601 
The Effect of Alloying on the Thermophysical and Mechanical Properties of Co–Ti–Cr-Based Superalloys
Zenk, C. H.; Volz, N.; Bezold, A.; Huber, L.-K.; Eggeler, Y. M.; Spiecker, E.; Göken, M.; Neumeier, S.
2020. Superalloys 2020: Proceedings of the 14th International Symposium on Superalloys. Ed.: S. Tin, 909–919, Springer. doi:10.1007/978-3-030-51834-9_89 
Using Rapid Thermal Annealing for Studying Early Stages of High-Temperature Oxidation of Superalloys
Kubacka, D.; Eggeler, Y. M.; Volz, N.; Neumeier, S.; Spiecker, E.
2020. Superalloys 2020: Proceedings of the 14th International Symposium on Superalloys. Ed.: S. Tin, 763–770, Springer. doi:10.1007/978-3-030-51834-9_74 
Tension/Compression asymmetry of a creep deformed single crystal Co-base superalloy
Lenz, M.; Eggeler, Y. M.; Müller, J.; Zenk, C. H.; Volz, N.; Wollgramm, P.; Eggeler, G.; Neumeier, S.; Göken, M.; Spiecker, E.
2019. Acta materialia, 166, 597–610. doi:10.1016/j.actamat.2018.12.053 
Nano- and Microstructural Evolution in Ni- and Co-based Single Crystal Superalloys. PhD dissertation
Eggeler, Y. M.
2019. Friedrich-Alexander-Universität 
Characterisation of Misfit Dislocations at Semicoherent Interfaces in Biphasic Functional Heusler Intermetallics
Eggeler, Y.; Levin, E. E.; Wang, F.; Seshadri, R.; Pollock, T. M.; Gianola, D. S.
2019. Microscopy and microanalysis, 25 (S2), 1916–1917. doi:10.1017/S1431927619010316 
Early stages of scale formation during oxidation of / ′ strengthened single crystal ternary Co-base superalloy at 900 °C
Weiser, M.; Eggeler, Y. M.; Spiecker, E.; Virtanen, S.
2018. Corrosion science, 135, 78–86. doi:10.1016/j.corsci.2018.02.020 
On the nucleation of planar faults during low temperature and high stress creep of single crystal Ni-base superalloys
Wu, X.; Dlouhy, A.; Eggeler, Y. M.; Spiecker, E.; Kostka, A.; Somsen, C.; Eggeler, G.
2018. Acta materialia, 144, 642–655. doi:10.1016/j.actamat.2017.09.063 
Identification of a ternary -phase in the Co-Ti-W system – An advanced correlative thin-film and bulk combinatorial materials investigation
Naujoks, D.; Eggeler, Y. M.; Hallensleben, P.; Frenzel, J.; Fries, S. G.; Palumbo, M.; Koßmann, J.; Hammerschmidt, T.; Pfetzing-Micklich, J.; Eggeler, G.; Spiecker, E.; Drautz, R.; Ludwig, A.
2017. Acta materialia, 138, 100–110. doi:10.1016/j.actamat.2017.07.037 
Combining advanced TEM techniques for full characterization of extended defects in creep-deformed single crystal superalloys
Spiecker, E.; Müller, J.; Eggeler, Y. M.; Lenz, M.
2016. European Microscopy Congress 2016: Proceedings, 780–781, Wiley-VCH Verlag. doi:10.1002/9783527808465.EMC2016.8697 
Assessing chemical and microstructural evolution at interfaces of ′- strengthened superalloys at high temperature by in situ TEM heating experiments
Eggeler, Y.; Enge, D.; Spiecker, E.
2016. European Microscopy Congress 2016: Proceedings, 225–226, Wiley-VCH Verlag. doi:10.1002/9783527808465.EMC2016.6911 
Analysing the tension/compression asymmetry in creep deformed Co-base superalloys using electron microscopy
Lenz, M.; Eggeler, Y.; Schweizer, P.; Zenk, C.; Neumeier, S.; Göken, M.; Wollgramm, P.; Eggeler, G.; Spiecker, E.
2016. European Microscopy Congress 2016: Proceedings, 221–222, Wiley-VCH Verlag. doi:10.1002/9783527808465.EMC2016.6787 
Planar defect formation in the ′ phase during high temperature creep in single crystal CoNi-base superalloys
Eggeler, Y. M.; Müller, J.; Titus, M. S.; Suzuki, A.; Pollock, T. M.; Spiecker, E.
2016. Acta materialia, 113, 335–349. doi:10.1016/j.actamat.2016.03.077 
Creep-induced planar defects in L12-containing Co- and CoNi-base single-crystal superalloys
Titus, M. S.; Eggeler, Y. M.; Suzuki, A.; Pollock, T. M.
2015. Acta materialia, 82, 530–539. doi:10.1016/j.actamat.2014.08.033 
Creep deformation-induced antiphase boundaries in L12-containing single-crystal cobalt-base superalloys
Eggeler, Y. M.; Titus, M. S.; Suzuki, A.; Pollock, T. M.
2014. Acta materialia, 77, 352–359. doi:10.1016/j.actamat.2014.04.037