A repatternable nanoimprint lithography stamp includes a magnetic substrate and magnetic core nanoparticles. The magnetic substrate includes a magnet and a magnetic mask, and the magnetic core nanoparticles are arranged in a pattern on a surface of the magnetic substrate. The pattern is defined by selective application of a magnetic field to the magnetic substrate using the magnet and the magnetic mask.

Discrete, individualized carbon nanotubes having targeted, or selective, oxidation levels and/or content on the interior and exterior of the tube walls are claimed. Such carbon nanotubes can have little to no inner tube surface oxidation, or differing amounts and/or types of oxidation between the tubes' inner and outer surfaces. These new discrete carbon nanotubes are useful in electromagnetic and radio frequency shielding applications, especially where the shielding is essentially constant over a relatively wide range of frequencies. Additives such as plasticizers, can be used in compounding and formulation of elastomeric, thermoplastic and thermoset composite for improvement of mechanical, electrical and thermal properties.

Systems for screening and health monitoring of materials are provided. The system can include a material embedded with magneto-electric nanoparticles (MENs), a laser configured to direct incident laser light waves at a target area of the material, an optical filter disposed between the laser and the material, and an analyzer configured to detect the laser light reflected from the material.

Disclosed herein are iron oxide nanoparticles prepared through high-temperature thermal decomposition of an Fe.sup.3+ precursor and an M.sup.+ or M.sup.2+ (M=Li, Na, K, Mg, and Ca) precursor in an oxygen atmosphere. The iron oxide nanoparticles are nanoparticles, in which an alkali metal or alkali earth metal is doped into an Fe vacancy site of -Fe.sub.2O.sub.3, and generate explosive heat even in a biocompatible low AC magnetic field. Through both in vitro and in vivo tests, it was proven that cancer cells could be killed by performing low-frequency hyperthermia using the iron oxide nanoparticles set forth above.

Disclosed embodiments enable equipment and methodologies that generate a magnetic field using at least one coil under the control of a controller and transduce radio-frequency energy into lower-frequency current or voltage under control of the controller for application to tissue in a subject's body, whereby the transduction produces a lower-field current or voltage that has an effect upon the subject's body tissue.

The present invention relates to plate-shaped iron oxide particles containing molybdenum and atoms derived from a shape control agent. The present invention relates to a method for producing the plate-shaped iron oxide particles, the method including a calcination step of calcining an iron compound in the presence of a molybdenum compound and a shape control agent.

A soft magnetic alloy comprising a main component having a compositional formula of ((Fe.sub.(1(+))X1.sub.X2.sub.).sub.(1(a+b))M.sub.aB.sub.b).sub.1cC.sub.c, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, M is one or more selected from the group Nb, Hf, Zr, Ta, Mo, W, and V, 0.030a0.14, 0.005b0.20, 0c0.040, 0, 0, and 0+0.50 are satisfied, when magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10P/S10.

A nano magneto-rheological fluid, comprising nano-scale magnetizable magnetic particles, wherein an average particle size or a minimum size in one dimension is less than 100 nanometers; and fluids used as carrier liquids, wherein the magnetic particles are dispersively distributed in the fluids. An apparatus for making the nanometric magnetorheological fluid including a ball mill, a settling separator located downstream of the ball mill for receiving the primary magnetic particles, a magnetic separator located downstream of and connected to the settling separator for receiving the upper layer of fluid containing fine magnetic particles, and an agitator for mixing the desired secondary magnetic particles with a carrier liquid and an additive. A method for making the nano magneto-rheological fluid wherein the nano magneto-rheological fluid has performance advantages such as no remanent magnetization, non-settlement, low viscosity, low abrasive rate for components, long service life, high reliability and fast and clear response.

Disclosed is a magnetic structure having a spike structure, the magnetic structure comprising: a core including at least one magnetic nanoparticle; a buffer disposed on an outer surface of the core; a shell disposed on an outer surface of the buffer, and at least one spike structure protruding outwardly from the shell, wherein the spike structure is controlled to have various shapes.

A method includes converting 9 nm soft-magnet AlCoPt into a hard-magnet L1.sub.0-CoPt, acid etching the hard-magnet L1.sub.0-CoPt, and annealing the acid etched hard-magnet L1.sub.0-CoPt to generate a L1.sub.0-CoPt/Pt catalyst.