La₂PrNi₂O₇ Nickelate Fibers and Powders Synthesized by One-Pot Chemistry and Solution Blow Spinning
Alfonso Pulgar1, Matheus P. Brambilla1, Davi G. M dos Santos1, Rodolfo Izquierdo Soto1, Maycon Motta2, Rafael Zadorosny1
1 São Paulo State University (UNESP), School of Engineering, Superconductivity and Advanced Materials Group, Ilha Solteira, SP (Brazil)
2 Federal University of São Carlos (UFSCar), São Carlos, SP (Brazil) - Department of Physics.
Lanthanum nickelates with Ruddlesden–Popper (RP) structure have attracted considerable attention due to their complex electronic properties [1], potential for superconductivity [2] and photocatalysis [3]. In particular, La₃Ni₂O₇ has recently shown superconducting behavior under high pressure, although the superconducting volume fraction remains limited [4,5]. Compositional tuning through rare-earth substitution has emerged as a promising strategy to modulate structural and electronic properties and potentially reduce the required external pressure. In this work, mixed lanthanide nickelates were synthesized in distinct morphologies, including submicrometric fibers and granular ceramics, using a chemical solution route. Fiber formation was achieved via Solution Blow Spinning (SBS), enabling controlled structuring at reduced length scales, while comparative samples were obtained through conventional processing. Morphological analyses revealed significant differences between the synthesis routes, while structural characterization confirmed the formation of the target phase. Notably, the fibrous morphology suggests improved structural organization, highlighting the potential of this approach for tailoring structure–property relationships in nickelate-based systems.
References
[1] J Gao et al., National Science Review. 8 (2021) nwaa218
[2] G Wang et al., Physical Review X. 14 (2024) 011040
[3] M. L Mocwana et al., Catalysts. 12 (2022) 1313
[4] M. Wang et al., Chinese Physics Letters 41(2024) 077402
[5] Y. Zhou at al., Preprint at arxiv. org/abs/2311.12361 (2023)
Acknoledgements
We acknowledge the support of the INCT project Advanced Quantum Materials, involving the Brazilian agencies CNPq (Proc. 408766/2024-7), FAPESP (Proc. 2025/27091-3), CAPES, and CNPq (grant 302786/2025-2 ).This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001 and FAPESP (grant 2025/22669-7).
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