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Polyacrylamide Ferrogels with Ni Nanowires

Abstract: Nickel magnetic nanowires (NWs) have attracted significant attention due to their unique properties, which are useful for basic studies and technological applications, for example in biomedicine. Their structure and magnetic properties were systematically studied in the recent years. In this work, Ni NWs with high aspect ratios (length/diameter ?250) were fabricated by electrodeposition into commercial anodic aluminum oxide templates. The templates were then etched and the NWs were suspended in water, where their hydrodynamic size was evaluated by dynamic light scattering. The magnetic response of these NWs as a function of an external magnetic field indicates a dominant shape anisotropy with propagation of the vortex domain wall as the main magnetization reversal process. The suspension of Ni NWs was used in the synthesis of two types of polyacrylamide ferrogels (FGs) by free radical polymerization, with weight fractions of Ni NWs in FGs of 0.036% and 0.169%. The FGs were reasonably homogeneous. The magnetic response of these FGs (hysteresis loops) indicated that the NWs are randomly oriented inside the FG, and their magnetic response remains stable after embedding.

 Fuente: Materials, 2019, 12, 2582

 Editorial: MDPI AG

 Fecha de publicación: 01/08/2019

 Nº de páginas: 11

 Tipo de publicación: Artículo de Revista

 DOI: 10.3390/ma12162582

 ISSN: 1996-1944

 Proyecto español: MAT2017-83631-C3-R

 Url de la publicación: https://doi.org/10.3390/ma12162582

Autoría

STADLER, BETHANIE J. H.

UM, JOSEPH

ZAMANI KOUHPANJI, MOHAMMAD REZA

SAFRONOV, ALEXANDER P.

GALYAS, ANDREY G.

KURLYANDSKAYA, GALINA V.