Inkjet printing of magnetic materials with aligned anisotropy

Song, Hyun-Ok; Spencer, Jeremy P. E.; Jander, Albrecht; Nielsen, Jeffrey; Stasiak, J.; Kasperchik, Vladek; Dhagat, Pallavi

doi:10.1063/1.4863168

Cited by 50 publications

(38 citation statements)

References 5 publications

(5 reference statements)

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“…With the aim of preparing integrated magnets on Micro-Electro Mechanical Systems (MEMS), magnetic particles immersed in a polymer matrix have been patterned using inkjet [23], imprinting [24] or photolithography techniques [25]. Alternatively, electroplating through masks [26,27] have been recently investigated.…”

Section: Introductionmentioning

confidence: 99%

Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets

et al. 2018

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Rare-earth free permanent magnets were produced by consolidation of cobalt nanorods synthesized by the polyol process exhibiting a mean diameter in the range 10 to 30 nm. Compactions of magnetically prealigned rod assemblies at various pressures and temperatures were carried out to make dense materials. Bulk magnets exhibiting a very good mechanical strength and an energy product as high as 65 kJ.m-3 were obtained. The best results were obtained when the compaction conditions were soft enough to preserve the morphology and alignment of the rods in the final material, as revealed by X-ray diffraction and neutron scattering. For the first time the bottom-up approach is convincingly reported to produce bulk magnets without the addition of any matrix, the obtained nanostructured materials exhibit coercivity much higher than the AlNiCo magnets and can fill the performance "gap" between hexaferrites and rare-earth based magnets.

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Section: Introductionmentioning

confidence: 99%

Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets

et al. 2018

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“…Ceramic matrix nanocomposites (CMNCs) with nanofibers or nanorods as the fillers are believed to be the best candidates for materials working in extreme environment and hence they are on demand in aerospace and space exploration applications . In composite films needed for inductor and antennae applications, the alignment of magnetic particles is required to increase the high frequency permeability and to lower the hysteresis losses . In applications to manufacturing of high density recording films and discs, spin alignment is required to carry the recorded information when spins in magnetic nanorods are prone to align parallel to the nanorod axis .…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Nanorods in Applications to Control of the In‐Plane Anisotropy of Composite Films and for In Situ Characterization of the Film Rheology

Kornev

2016

Adv Funct Materials

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3796 wileyonlinelibrary.com nanorods as the fi llers are believed to be the best candidates for materials working in extreme environment and hence they are on demand in aerospace and space exploration applications. [39][40][41][42][43] In composite fi lms needed for inductor and antennae applications, the alignment of magnetic particles is required to increase the high frequency permeability and to lower the hysteresis losses. [44][45][46][47] In applications to manufacturing of high density recording fi lms and discs, spin alignment is required to carry the recorded information when spins in magnetic nanorods are prone to align parallel to the nanorod axis. [ 37,[48][49][50] In optical applications, magnetic liquid crystals are attractive candidates for making reconfi gurable magnetooptical devices with the fast time response measured in milliseconds. [11][12][13][14][15][16][17][18][51][52][53] In all these applications, one needs to control the alignment of magnetic nanorods in liquid medium. Therefore, this problem is actively discussed in the literature; however, the general strategy for making macroscopic samples with ordered nanorods has not been developed yet and it remains the main challenge of materials engineering [32][33][34][35][39][40][41][42]54 ] Processing of multifunctional coatings and thin fi lms require many steps and hence one needs to control the fi lm properties at each step.Rheological properties of the fi lms at each stage of their processing play the most important role in nanorod ordering and keeping nanorods in place. Characterization of thin coating fi lms during composite manufacturing remains challenging. Different experimental methods have been proposed and developed for in situ characterization of rheological properties of thin fi lms and coatings. [ 20,[25][26][27][55][56][57][58][59][60] It appears that unique features of rotation of ferromagnetic nanorods can be used for characterization of very thin fi lms when other methods fall short. Recently introduced magnetic rotational spectroscopy (MRS) with nanoparticles and nanorods allows one to probe fl uid rheology in very thin fi lms and nanoliter droplets. [ 12,20,22,25,60,61 ] MRS takes advantage of a distinguishable behavior of rotating magnetic tracers as the frequency of applied rotating fi eld changes. Unlike many methods based on the analysis of small oscillations, which are diffi cult to interpret when the fi lm is very thin, MRS with magnetic nanorods enjoys analysis of full revolutions of magnetic tracers. [ 20,22,24,25,60,62,63 ] Understanding of the characteristic features of rotation of a single nanorod in complex fl uids and alignment of an assembly

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Section: Bioinspired Mechanics Reinforced Structures By 3d Printingmentioning

confidence: 99%

“…This technology offers a promising route forward in making high‐resolution, optimally reinforced composite materials with 3D printing. Magnetic films with and without particle alignment were printed, and their magnetic properties were compared . The linear alignment field was also applied in the X direction during the printing process as shown in Figure i in the square sample and the substrate was rotated to get the radial alignment.…”

Section: Bioinspired Mechanics Reinforced Structures By 3d Printingmentioning

confidence: 99%

Recent Progress in Biomimetic Additive Manufacturing Technology: From Materials to Functional Structures

et al. 2018

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Nature has developed high-performance materials and structures over millions of years of evolution and provides valuable sources of inspiration for the design of next-generation structural materials, given the variety of excellent mechanical, hydrodynamic, optical, and electrical properties. Biomimicry, by learning from nature's concepts and design principles, is driving a paradigm shift in modern materials science and technology. However, the complicated structural architectures in nature far exceed the capability of traditional design and fabrication technologies, which hinders the progress of biomimetic study and its usage in engineering systems. Additive manufacturing (three-dimensional (3D) printing) has created new opportunities for manipulating and mimicking the intrinsically multiscale, multimaterial, and multifunctional structures in nature. Here, an overview of recent developments in 3D printing of biomimetic reinforced mechanics, shape changing, and hydrodynamic structures, as well as optical and electrical devices is provided. The inspirations are from various creatures such as nacre, lobster claw, pine cone, flowers, octopus, butterfly wing, fly eye, etc., and various 3D-printing technologies are discussed. Future opportunities for the development of biomimetic 3D-printing technology to fabricate next-generation functional materials and structures in mechanical, electrical, optical, and biomedical engineering are also outlined.

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Inkjet printing of magnetic materials with aligned anisotropy

Cited by 50 publications

References 5 publications

Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets

Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets

Ferromagnetic Nanorods in Applications to Control of the In‐Plane Anisotropy of Composite Films and for In Situ Characterization of the Film Rheology

Recent Progress in Biomimetic Additive Manufacturing Technology: From Materials to Functional Structures

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