Multi-Segmented Nanowires: A High Tech Bright Future

Abstract

In the last couple of decades, there has been a lot of progress in the synthesis methods of nano-structural materials, but still the field has a large number of puzzles to solve. Metal nanowires (NWs) and their alloys represent a sub category of the 1-D nano-materials and there is a large effort to study the microstructural, physical and chemical properties to use them for further industrial applications. Due to technical limitations of single component NWs, the hetero-structured materials gained attention recently. Among them, multi-segmented NWs are more diverse in applications, consisting of two or more segments that can perform multiple function at a time, which confer their unique properties. Recent advancement in characterization techniques has opened up new opportunities for understanding the physical properties of multi-segmented structures of 1-D nanomaterials. Since the multi-segmented NWs needs a reliable response from an external filed, numerous studies have been done on the synthesis of multi-segmented NWs to precisely control the physical properties of multi-segmented NWs. This paper highlights the electrochemical synthesis and physical properties of multi-segmented NWs, with a focus on the mechanical and magnetic properties by explaining the shape, microstructure, and composition of NWs.

Supraparticles for Sustainability

“…Progress in this field is well reported in other articles and is thus not further discussed herein. [ 217 ]…”

Fe/Mn multilayer nanowires as dual mode T1–T2 magnetic resonance imaging contrast agents

“…Electrodeposition is versatile and simple technique to synthesize the 1-D magnetic nano materials. [22][23][24][25][26][27][28][29] Fe and Mn materials are chosen based on the idea that, the nanometer Fe has very large magnetic susceptibility, and paramagnetic Mn has many unpaid electrons in their outer most shell, by combining the two materials as 1-D multilayer structure, the biocompatibility and high sensitivity can be obtain to provide the required MR images.…”

“…To address the above stated problems, one‐dimensional Fe/Mn multilayered NWs, and single component Fe and Mn NWs was prepared by electrodeposition in 30 nm diameter anodic aluminum oxide (AAO) template. Electrodeposition is versatile and simple technique to synthesize the 1‐D magnetic nano materials 22‐29 . Fe and Mn materials are chosen based on the idea that, the nanometer Fe has very large magnetic susceptibility, and paramagnetic Mn has many unpaid electrons in their outer most shell, by combining the two materials as 1‐D multilayer structure, the biocompatibility and high sensitivity can be obtain to provide the required MR images.…”

The Magnetic Properties of Fe/Cu Multilayered Nanowires: The Role of the Number of Fe Layers and Their Thickness

“…On the other hand, complementary studies have reported the magnetic behavior of multi-segmented NWs with tuned lengths of the non-magnetic layer, e.g., Co/Cu [ 27 , 33 ], Ni/Cu [ 21 , 23 , 34 ], CoFe/Au [ 29 ], CoFe/Cu [ 35 ] FeCoCu/Cu [ 36 ], FeCo/Cu [ 37 ], and CoFeB/Cu [ 32 ] nanostructures. These works have demonstrated that the magnetic behavior of the multilayered nanoarchitectures can be selectively tuned according to the required applications [ 20 , 38 , 39 , 40 ]. However, to employ such structures in biomedical applications, and since Co and Ni possess high toxicity levels, the need to fabricate completely biocompatible segmented NWs has arisen.…”