Liquid magnets made possible by Berkley lab 3D printing

An oil-soluble dye reveals how liquid magnets rotate when exposed to a magnetic field. Image Credit Xubo Liu Berkeley National Lab

An oil-soluble dye reveals how liquid magnets rotate when exposed to a magnetic field. Image Credit Xubo Liu Berkeley National Lab

Because of nanoparticle-polymer mix interactions, the resulting ultra-soft droplet has magnetic properties similar to solid magnets but with liquid characteristics. This could include artificial cells that can deliver targeted cancer therapies, or flexible liquid robots that can change their shape to adapt to their surroundings. Russell is the head of a program called Adaptive Interfacial Assemblies Towards Structuring Liquids.

Prof Russell said: "These incredible liquid magnetic materials will attract attention in biology, physics and chemistry". "No one has ever observed this before", explained Russell. Based on these special physical properties, ferrofluids are already used in electrical devices, medical applications, mechanical engineering and materials science research, he notes. "Before our study, people always assumed that permanent magnets could only be made from solids", said Russell.

The study published on Thursday in the journal Science described the one-millimeter droplets made from a ferrofluid solution containing billions of iron-oxide-nanoparticles just 20 nanometers in diameter. To make the particle magnetic, the team placed the droplets by a magnetic coil solution, and the magnetic coil pulled the nanoparticles towards it. However, when the coil was removed, the droplets kept their magnetism permanently, while gravitating towards each other in ideal unison, in what the scientists described as an "elegant swirl" or "little dancing droplets".

Next, the team passed a magnetic coil over the droplets, which fired up their magnetism. GIF via Xubo Liu/Berkeley Lab.

This means that by applying an external magnetic field, scientists can control liquid devices made this way, like waving Harry Potter's wand, he suggests, "which opens promising research and application areas such as liquid actuators, liquid robotics and active-matter delivery". With just 8 nanometers between each of the billion nanoparticles, together they created a solid surface around each liquid droplet.

Impone nuevas sanciones contra cuatro oficiales venezolanos
Guerrero trabaja bajo la supervisión del director general de la Dgcim y comandante de la Guardia de Honor Presidencial, Iván Rafael Hernández Dala .

Id Software studio boss Willits to leave the Doom developer
He also served as a director on Quake Champions , which is now free-to-play and a good time if you're an old-school shooter fan. The dev says that his absence won't affect any games now in development like Doom Eternal or RAGE 2's post-release roadmap.

Murió el prestigioso arquitecto argentino César Pelli
Allí nacieron sus hijos Denis en 1953 y Rafael en 1956, junto a quienes vivieron entre 1964 y 1976 en Los Angeles. Quien confirmó la noticia de su fallecimiento fue el gobernador de Tucumán, Juan Manzur , en las redes sociales.

Key to this finding were the iron-oxide nanoparticles jamming tightly together at the droplet's surface.

Upon magnetization, the jammed nanoparticles at the solid surface transfer their magnetic orientation to the particles at the core, thus enabling the whole droplet to become permanently magnetic. On nearer inspection, the researchers discovered that the droplets retained their form because the nanoparticles were crowding around the edges.

Among the magnetic droplets' many incredible qualities, what stands out even more, Russell noted, is that they change shape to adapt to their surroundings. Now, usually all the magnetic devices that produce magnetic fields are composed of solid materials, however, the latest innovation a team of scientists at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) makes use of liquid for magnetic devices.

"What began as a curious observation ended up opening a new area of science".

Recommended News

Nos complace proporcionar esta oportunidad para compartir información, experiencias y observaciones sobre lo que está en las noticias.
Algunos de los comentarios pueden ser reimpresos en otra parte del sitio o en el periódico.
Gracias por tomarse el tiempo para ofrecer sus pensamientos.