State-of-the-Art of Nanocomposite Materials in Spain

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 2422

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Guest Editor
Department of Applied Physics, University of Vigo, 36310 Vigo, Spain
Interests: molecular simulation; statistical mechanics; thermodynamics; complex fluids; interfaces; confinement; nanofluids; hydrates, clathrates
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Special Issue Information

Dear colleagues,

The synergy between recent achievements in nanotechnology and material science is bringing to light amazing scientific innovations that only a few years ago might have been considered completely unfeasible. The development of novel techniques to design, synthetize, and characterize tailored hybrid nanocomposites today is playing a crucial role in many practical applications, guided by a deeper understanding of chemistry and physics within this distance scale. The horizon of possibilities ranges from biomedical and biotechnology applications to nanoelectronics, energy production and conversion, optics, etc.

Since the emergence of nanotechnology as a scientific domain, Spain has developed a wide network of research institutions and companies that has produced truly relevant scientific and technological contributions in this field. The objective of this Special Issue, entitled “State-of-the-Art of Nanocomposite Materials in Spain”, is to provide an updated general perspective of the research that is currently being carried out. Contributions are welcome in any of the related nanocomposite materials applications, including collaborations of Spanish research groups with international collaborators.

Prof. Dr. Manuel M. Piñeiro
Guest Editor

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Published Papers (1 paper)

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Research

16 pages, 4034 KiB  
Article
Boosting the Tunable Microwave Scattering Signature of Sensing Array Platforms Consisting of Amorphous Ferromagnetic Fe2.25Co72.75Si10B15 Microwires and Its Amplification by Intercalating Cu Microwires
by Diego Archilla, Jesús López-Sánchez, Antonio Hernando, Elena Navarro and Pilar Marín
Nanomaterials 2021, 11(4), 920; https://doi.org/10.3390/nano11040920 - 04 Apr 2021
Cited by 7 | Viewed by 2023
Abstract
The following work addresses new configurations of sensing array platforms that are composed of Co-based amorphous ferromagnetic microwires (MWs) to obtain an enhanced modulation of the microwave scattering effects through the application of low strength DC or AC magnetic fields. An amorphous MW [...] Read more.
The following work addresses new configurations of sensing array platforms that are composed of Co-based amorphous ferromagnetic microwires (MWs) to obtain an enhanced modulation of the microwave scattering effects through the application of low strength DC or AC magnetic fields. An amorphous MW is an ultrasoft ferromagnetic material (coercivity ~0.2 Oe) with a circumferential magnetic anisotropy that provides a high surface sensitivity when it is subjected to an external magnetic field. Firstly, microwave scattering experiments are performed as a function of the length and number of MWs placed parallel to each other forming an array. Subsequently, three array configurations are designed, achieving high S21 scattering coefficients up to about −50 dB. The influence of DC and AC magnetic fields on S21 has been analyzed in frequency and time domains representation, respectively. In addition, the MWs sensing array has been overlapped by polymeric surfaces and the variations of their micrometric thicknesses also cause strong changes in the S21 amplitude with displacements in the frequency that are associated to the maximum scattering behavior. Finally, a new concept for amplifying microwave scattering is provided by intercalating Cu MWs into the linear Co-based arrays. The designed mixed system that is composed by Co-based and Cu MWs exhibits a higher S21 coefficient when compared to a single Co-based MW system because of higher electrical conductivity of Cu. However, the ability to modulate the resulting electromagnetic scattering is conferred by the giant magneto-impedance (GMI) effects coming from properties of the ultrasoft amorphous MWs. The mixed array platform covers a wide range of sensor applications, demonstrating the feasibility of tuning the S21 amplitude over a wide scattering range by applying AC or DC magnetic fields and tuning the resonant frequency position according to the polymeric slab thickness. Full article
(This article belongs to the Special Issue State-of-the-Art of Nanocomposite Materials in Spain)
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