Issue 18, 2021

Synthesis of morphology-improved single-crystalline iron silicide nanowires with enhanced physical characteristics

Abstract

Single-crystalline iron silicide nanowires were synthesized via an original approach, pre-deposition method (PDM), with significantly improved morphologies and physical characteristics as compared with those fabricated by conventional chemical vapor deposition. In the pre-deposition method, combining rapid thermal annealing (RTA) and chemical vapor deposition (CVD), iron silicide nanowires grew from the heterogeneous nucleation sites on the surface of the thin film without a catalyst or Al2O3 template. The morphology of the nanowires has been considerably improved in terms of alignment and aspect ratio. HRTEM analysis confirms that the nanowires were β-FeSi2 with a crystal direction of [111]. Physical property measurements indicate that compared with CVD β-FeSi2 nanowires, β-FeSi2 nanowires synthesized by the PDM performed better in both the field emission and magnetic properties. Magnetic property measurements show that the coercive field of PDM nanowires increased from 249 Oe to 900 Oe. Field emission studies reveal that the average β value of the CVD β-FeSi2 nanowires was 1060, while that of the PDM nanowires became 1892. Notably, with a furnace, few researchers can successfully synthesize nanowires of β-FeSi2, which is one of the most fascinating silicides for its important applications.

Graphical abstract: Synthesis of morphology-improved single-crystalline iron silicide nanowires with enhanced physical characteristics

Supplementary files

Article information

Article type
Communication
Submitted
24 févr. 2021
Accepted
01 avr. 2021
First published
06 avr. 2021

CrystEngComm, 2021,23, 3270-3275

Synthesis of morphology-improved single-crystalline iron silicide nanowires with enhanced physical characteristics

W. Huang, S. Yang, T. Liao and K. Lu, CrystEngComm, 2021, 23, 3270 DOI: 10.1039/D1CE00267H

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