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The controlled arrangement of nanowires plays a very important role in the development of their application in optoelectronics, nanoelectronics, sensors and spintronic devices. The arrangement of one-dimensional nanostructures has been done using different techniques such as optical manipulation, microfluidics, electric and magnetic fields. In this article, we have used the Langmuir-Blodgett technique for the deposition of magnetic nanowires in the presence of an external magnetic field on solid surfaces. We synthesized magnetic nanowires using direct voltage electrodeposition method and aluminum oxide template, with a hole diameter of 200 nm. After cleaning, we dropcasted the nanowires on the surface of deionized water in a Langmuir trough (Teflon) using a plastic microsyringe. Using two moving barriers, the magnetic nanowires were collected on the subphase (water) surface and at a certain surface pressure and in the presence of an external magnetic field, Langmuir films were transferred to solid substrates. The scanning electron microscope images of the monolayers show that the nanowires are aligned almost in the same direction as the magnetic field. In order to compare the Langmuir–Blodgett films of nanowires with the dropcasting method, films of nanowires using dropcasting method were prepared in the presence and absence of an external magnetic field. This comparison showed that a monolayer film of nanowires can be prepared only by the Langmuir-Blodgett method. Cheapness, high operating speed, layering in large areas, as well as diversity in the morphology of single layers are the importance and advantages of the Langmuir-Blodgett technique.

Keywords: Magnetic nanowires, Deposition, Langmuir–Blodgett, Film, Magnetic field

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