Crystalline and amorphous structure selectivity of ignoble high-entropy alloy nanoparticles during laser ablation in organic liquids is set by pulse duration

• Robert Stuckert,
• Felix Pohl,
• Oleg Prymak,
• Ulrich Schürmann,
• Christoph Rehbock,
• Lorenz Kienle and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2025, 16, 1141–1159, doi:10.3762/bjnano.16.84

• heterogeneous catalysts or magnets. In that context, the outstanding temperature stability up to 375 °C (differential scanning calorimetry) or 500 °C (transmission electron microscopy) may motivate future application-relevant work. Keywords: amorphous; cantor alloy; compositionally complex alloy; complex solid

• on the laser synthesis of colloidal Cantor alloy (CrMnFeCoNi) NPs, systematically varying pulse duration (ps and ns pulses) in laser ablation in organic solvents (acetone, ethanol, acetonitrile), aiming to deduce general design rules triggering the formation of crystalline or amorphous structures in

• structures contribute to the (111)-reflection of the fcc structure (average crystallite size = 10 nm). This follows a study by Johny et al., where the authors also reported a small amount of larger crystalline particles after ns-LAL of Cantor alloy NPs in the sample by XRD, among the dominant amount of

Synthesis and magnetic transitions of rare-earth-free Fe–Mn–Ni–Si-based compositionally complex alloys at bulk and nanoscale

• Shabbir Tahir,
• Tatiana Smoliarova,
• Carlos Doñate-Buendía,
• Michael Farle,
• Natalia Shkodich and
• Bilal Gökce

Beilstein J. Nanotechnol. 2025, 16, 823–836, doi:10.3762/bjnano.16.62

• irradiation of the target material submerged in a liquid environment. This makes PLAL a safe, scalable and environmentally friendly approach [46][47][48]. Research on the synthesis of CoCrFeMnNi Cantor alloy NPs by PLAL demonstrated that this method consistently produces NPs with near-equiatomic compositions

• stoichiometry, since the more volatile components evaporate more efficiently. The greatest deviation was observed for Mn, with a variance of 31.4% below the expected composition, compared to just 1.8% variance in the bulk Ge-based CCA. This was also observed in our previous work [41] on Cantor alloy NPs

Size control of nanoparticles synthesized by pulsed laser ablation in liquids using donut-shaped beams

• Abdel Rahman Altakroury,
• Oleksandr Gatsa,
• Farbod Riahi,
• Zongwen Fu,
• Miroslava Flimelová,
• Andrei Samokhvalov,
• Stephan Barcikowski,
• Carlos Doñate-Buendía,
• Alexander V. Bulgakov and
• Bilal Gökce

Beilstein J. Nanotechnol. 2025, 16, 407–417, doi:10.3762/bjnano.16.31

• most elegant, surfactant-free size quenching method by micromolar anion addition only works for soft Lewis-acid nanoparticle materials, in particular, Au, Pt, and Pd, as the process is driven by anion adsorption Hofmeister effects, but not for oxide or multi-base metal materials such as the Cantor

• alloy. A certain degree of control over the NP size can be obtained by varying the laser parameters, such as fluence, wavelength, and pulse duration [11][25][30][31]. Doñate-Buendía et al. reduced the bimodality by employing a picosecond delayed double-pulse laser configuration [32]. In all the previous