Multisegmented FeCo/Cu nanowires: electrosynthesis, characterization, and magnetic control of biomolecule desorption.

ACS Applied Materials & Interfaces
Berna ÖzkaleSalvador Pané

Abstract

In this paper, we report on the synthesis of FeCo/Cu multisegmented nanowires by means of pulse electrodeposition in nanoporous anodic aluminum oxide arrays supported on silicon chips. By adjustment of the electrodeposition conditions, such as the pulse scheme and the electrolyte, alternating segments of Cu and ferromagnetic FeCo alloy can be fabricated. The segments can be built with a wide range of lengths (15-150 nm) and exhibit a close-to-pure composition (Cu or FeCo alloy) as suggested by energy-dispersive X-ray mapping results. The morphology and the crystallographic structure of different nanowire configurations have been assessed thoroughly, concluding that Fe, Co, and Cu form solid solution. Magnetic characterization using vibrating sample magnetometry and magnetic force microscopy reveals that by introduction of nonmagnetic Cu segments within the nanowire architecture, the magnetic easy axis can be modified and the reduced remanence can be tuned to the desired values. The experimental results are in agreement with the provided simulations. Furthermore, the influence of nanowire magnetic architecture on the magnetically triggered protein desorption is evaluated for three types of nanowires: Cu, FeCo, and multisegmented...Continue Reading

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Citations

Oct 1, 2016·Small·Naveen ShamsudhinSalvador Pané
Oct 1, 2019·Advanced Materials·Zhen HeShu-Hong Yu
Nov 30, 2019·Materials·Da-Shuang WangXiaoming Cao
Jul 6, 2018·Nanomaterials·Suellen MoraesJoão P Araújo
Jul 2, 2020·Nanotechnology·Aiman MukhtarLiyuan Gu
May 31, 2018·ACS Nano·Cristina BranManuel Vazquez

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