Fabrication of cuprate superconducting La1.85Sr0.15CuO4 nanofibers by electrospinning and subsequent calcination in oxygen

• Published in: CrystEngComm 2011-01, Vol.13 (23), p.6964-6967
• Main Authors: Li, Jian-Min, Zeng, Xian-Lin, Mo, Ai-Di, Xu, Zhu-An
• Format: Article
• Language: English
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/c1ce06032e

The synthesis of high-temperature cuprate superconducting La 1.85 Sr 0.15 CuO 4 (LSCO) flute-like nanofibers (FNFs) via electrospinning and subsequent calcination in oxygen is reported. A reduced superconducting critical temperature was found to be around 19.2 K, a considerable decrease in comparison to its bulk counterpart (∼ 37 K). The weakened superconductivity in the LSCO FNFs is relevant to the following observations that (i) the presence of disorder or the amount of structural defects in the FNFs, (ii) the ab -plane dilatation (∼ 0.41%) and c -axis-compression (∼ 0.16%) distortions, leads to the reduced in-plane hybridization, and (iii) the suppression of A 1g Raman-active phonon mode ∼ 430 cm −1 and enhancement of B 1g mode ∼ 370 cm −1 , is associated with the weakened electron-phonon coupling interaction. Our work demonstrates a "clean" high-yield nanofabrication of high-temperature cuprate superconducting materials. The synthesis of high-temperature cuprate superconducting La 1.85 Sr 0.15 CuO 4 (LSCO) flute-like nanofibers (FNFs) via electrospinning and subsequent calcination in oxygen is reported.