Fe whisker growth revisited: effect of Au catalysis for [021̄] oriented nanowires with 100 nm diameter

Abstract

The growth mechanism of Fe nanowires and the role of Au nanoparticle catalysis were revealed using transmission electron microscopy and electron diffraction analysis. Fe nanowire has a high aspect ratio and unique [021̄] orientation.

Growth Kinetics and Magnetic Property of Single-Crystal Fe Nanowires Grown via Vapor–Solid Mechanism Using Chemically Synthesized FeO Nanoparticle Catalysts

“…Figure shows a schematic illustration of the home-built CVD equipment with a two-flow system for the growth of the Fe NWs in this study. The CVD equipment was partly modified to improve its controllability and reproducibility compared to previous reports. , Our CVD system includes a furnace with three temperature-controllable zones, an outer quartz tube with a diameter of 28 mm, and an inner quartz tube with a diameter of 6 mm. Each zone of the furnace was labeled zone A, zone B, and zone C from upstream.…”

“…Our research group has revisited the Fe whisker growth that was studied in the 1960s–1970s, − then synthesized the single-crystal Fe NWs on an Al 2 O 3 substrate with Au nanoparticles as the catalyst and on a YSZ substrate without a catalyst . If one can avoid using expensive single-crystal substrates, such as Al 2 O 3 and YSZ, the CVD becomes more realistic as a practical method to synthesize single-crystal Fe NWs.…”

Preparation and electromagnetic wave absorbing properties of 3D graphene/pine needle-like iron nano-acicular whisker composites

“…7 The whisker interior atoms are completely aligned in the same direction and position, forming an ideal crystal without any defects and having a high tensile strength. 8,9 According to the previous reports, [10][11][12] the strength of iron whisker is more than 100 times of the ordinary iron strength. In addition, they have good chemical stability, anti-high temperature, anti-oxidation and EM wave absorption performance.…”

Synthesis of single-crystalline Fe nanowires using catalyst-assisted chemical vapor deposition

“…CVD was employed to grow Fe whiskers of several micronmeters by reducing FeCl 2 in a H 2 environment [15]. The technique is extended to fabricate Fe nanowires assisted with Au nanoparticle catalysts on Al 2 O 3 substrate [16]. However, Fe nanowires grow horizontally on Al 2 O 3 substrate, resulting in a poor yield.…”