Magnetic Analysis of MgFe Hydrotalcites as Powder and Dispersed in Thin Films within a Keratin Matrix

Year: 2023

Authors: Dinelli F., Modestino M., Galluzzi A., Posati T., Seri M., Zamboni R., Sotgiu G., Polichetti M.

Autors Affiliation: Ist Nazl Ott INO CNR, Via Moruzzi 1, I-56124 Pisa, Italy; Univ Salerno, Dipartimento Fis, Via Giovanni Paolo II 132, I-84084 Fisciano, Italy; CNR, Ist Superconduttori Materiali Innovat & Disposit S, Via Giovanni Paolo II 132, I-84084 Fisciano, Italy; CNR, Ist Sintesi Organ & Fotoreatt ISOF, Via Gobetti 101, I-40129 Bologna, Italy; CNR, Ist Studio Materiali Nanostrutturati ISMN, Via Gobetti 101, I-40129 Bologna, Italy; Kerline Srl, Via Gobetti 101, I-40129 Bologna, Italy.

Abstract: Hydrotalcites (HTlcs) are a class of nanostructured layered materials that may be employed in a variety of applications, from green to bio technologies. In this paper, we report an investigation on HTlcs made of Mg and Fe, recently employed to improve the growth in vitro of osteoblasts within a keratin sponge. We carried out an analysis of powder materials and of HTlcs dispersed in keratin and spin-coated on a Si/SiO2 substrate at different temperatures. A magnetic study of the powders was carried out with a Quantum Design Physical Property Measurement System equipped with a Vibrating Sample Magnetometer. The data gathered prove that these HTlcs are fully paramagnetic, and keratin showed a very small magnetic response. Optical and Atomic Force Microscopy analyses of the thin films provide a detailed picture of clusters randomly dispersed in the films with various dimensions. The magnetic properties of these films were characterized using the Nano Magneto Optical Kerr Effect (NanoMOKE) down to 7.5 K. The data collected show that the local magnetic properties can be mapped with a micrometric resolution distinguishing HTlc regions from keratin ones. This approach opens new perspectives in the characterization of these composite materials.

Journal/Review: NANOMATERIALS

Volume: 13 (14)      Pages from: 2029-1  to: 2029-14

KeyWords: hydrotalcites; magnetic properties; NanoMOKE; PPMS-VSM; thin films; Keratin
DOI: 10.3390/nano13142029

ImpactFactor: 4.400
Citations: 1
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-24
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