Issue 23, 2011

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

Abstract

The synthesis of high-temperature cuprate superconducting La1.85Sr0.15CuO4 (LSCO) flute-like nanofibers (FNFs) viaelectrospinning 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 A1g Raman-active phonon mode ∼ 430 cm−1 and enhancement of B1g 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.

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

Article information

Article type
Communication
Submitted
10 Aug 2011
Accepted
03 Oct 2011
First published
19 Oct 2011

CrystEngComm, 2011,13, 6964-6967

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

J. Li, X. Zeng, A. Mo and Z. Xu, CrystEngComm, 2011, 13, 6964 DOI: 10.1039/C1CE06032E

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