Laser ablation synthesis particularly excels in generating bimetallic and multimetallic nanoparticles either from bulk alloy targets or from mixed powders. These particles can be obtained with a stoichiometry and with compositions which can be very difficult to synthesize by chemical methods. Furthermore, we examine the formation of metastable structures, which emerge from the laser ablation process.
Our main research goals and interests are:
- Understanding the formation process of alloy nanoparticles during laser ablation in liquids
- Tuning composition and internal phase structure of alloy nanoparticles by solvent and target composition
- Plasmonic properties of alloy nanoparticles containing noble metals (Ag,Au)
- Application of alloy nanoparticles for bioimaging or as antimicrobial agents
Publications:
[1] Johny, J.; Li, Y.; Kamp, M.; Prymak, O.; Liang, S. X.; Krekeler, T.; Ritter, M.; Kienle, L.; Rehbock, C.; Barcikowski, S.; Reichenberger, S. Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts. Nano Res. (2022), 15, 4807-4819.
[2] Stein, F.; Kohsakowski, S.; Martinez-Hincapie, R.; Reichenberger, S.; Rehbock, C.; Colic, V.; Guay, D.; Barcikowski, S. Disproportional surface segregation in ligand-free gold–silver alloy solid solution nanoparticles, and its implication for catalysis and biomedicine. Faraday Discussions (2022) Advanced Article.
[3] Johny, J.; Prymak, O.; Kamp, M.; Calvo, F.; Kim, S. H.; Tymoczko, A.; El-Zoka, A.; Rehbock, C.; Schurmann, U.; Gault, B.; Kienle, L.; Barcikowski, S. Multidimensional thermally-induced transformation of nest-structured complex Au-Fe nanoalloys towards equilibrium. Nano Research (2022) 15, 581-592.
[4] Johny, J.; Kamp, M.; Prymak, O.; Tymoczko, A.; Wiedwald, U.; Rehbock, C.; Schurmann, U.; Popescu, R.; Gerthsen, D.; Kienle, L.; Shaji, S.; Barcikowski, S. Formation of Co-Au Core-Shell Nanoparticles with Thin Gold Shells and Soft Magnetic epsilon-Cobalt Cores Ruled by Thermodynamics and Kinetics. Journal of Physical Chemistry C (2021) 125, 9534-9549.
[5] Johny, J.; Li, Y.; Kamp, M.; Prymak, O.; Liang, S. X.; Krekeler, T.; Ritter, M.; Kienle, L.; Rehbock, C.; Barcikowski, S.; Reichenberger, S. Laser-generated high entropy metallic glass nanoparticles as bifunctional electrocatalysts. Nano Research.
[6] Al-Zubeidi, A.; Stein, F.; Flatebo, C.; Rehbock, C.; Jebeli, S. A. H.; Landes, C. F.; Barcikowski, S.; Link, S. Single-Particle Hyperspectral Imaging Reveals Kinetics of Silver Ion Leaching from Alloy Nanoparticles. ACS Nano (2021) 15, 8363-8375.
[7] Tymoczko, A.; Kamp, M.; Rehbock, C.; Kienle, L.; Cattaruzza, E.; Barcikowski, S.; Amendola, V. One-step synthesis of Fe-Au core-shell magnetic-plasmonic nanoparticles driven by interface energy minimization. Nanoscale Horizons (2019) 4, 1326-1332.
[8] Kamp, M.; Tymoczko, A.; Schurmann, U.; Jakobi, J.; Rehbock, C.; Ratzke, K.; Barcikowski, S.; Kienle, L. Temperature-Dependent Ultrastructure Transformation of Au-Fe Nanoparticles Investigated by in Situ Scanning Transmission Electron Microscopy. Crystal Growth & Design (2018) 18, 5434-5440.
[9] Tymoczko, A.; Kamp, M.; Prymak, O.; Rehbock, C.; Jakobi, J.; Schurmann, U.; Kienle, L.; Barcikowski, S. How the crystal structure and phase segregation of Au-Fe alloy nanoparticles are ruled by the molar fraction and size. Nanoscale (2018) 10, 16434-16437.
[10] O. Prymak, J. Jakobi, C. Rehbock, M. Epple, S. Barcikowski, Crystallographic characterization of laser-generated, polymer-stabilized 4 nm silver-gold alloyed nanoparticles, Materials Chemistry and Physics, 207 (2018) 442-450.
[11] P. Wagener, J. Jakobi, C. Rehbock, V.S.K. Chakravadhanula, C. Thede, U. Wiedwald, M. Bartsch, L. Kienle, S. Barcikowski, Solvent-surface interactions control the phase structure in laser-generated iron-gold core-shell nanoparticles, Scientific Reports, 6 (2016) 12.
[12] U. Taylor, D. Tiedemann, C. Rehbock, W.A. Kues, S. Barcikowski, D. Rath, Influence of gold, silver and gold-silver alloy nanoparticles on germ cell function and embryo development, Beilstein Journal of Nanotechnology, 6 (2015) 651-664.
[13] C. Rehbock, J. Jakobi, L. Gamrad, S. van der Meer, D. Tiedemann, U. Taylor, W. Kues, D. Rath, S. Barcikowski, Current state of laser synthesis of metal and alloy nanoparticles as ligand-free reference materials for nano-toxicological assays, Beilstein Journal of Nanotechnology, 5 (2014) 1523-1541.
[14] A. Neumeister, J. Jakobi, C. Rehbock, J. Moysig, S. Barcikowski, Monophasic ligand-free alloy nanoparticle synthesis determinants during pulsed laser ablation of bulk alloy and consolidated microparticles in water, Physical Chemistry Chemical Physics, 16 (2014) 23671-23678.
[15] D. Tiedemann, U. Taylor, C. Rehbock, J. Jakobi, S. Klein, W.A. Kues, S. Barcikowski, D. Rath, Reprotoxicity of gold, silver, and gold-silver alloy nanoparticles on mammalian gametes, Analyst, 139 (2014) 931-942.
[16] S. Grade, J. Eberhard, J. Jakobi, A. Winkel, M. Stiesch, S. Barcikowski, Alloying colloidal silver nanoparticles with gold disproportionally controls antibacterial and toxic effects, Gold Bulletin, 46 (2013) 3-11.
