One potential cancer treatment selectively deposits heat to the tumor through activation of magnetic nanoparticles inside tumor. This can damage or kill cells without harming surrounding healthy tissue. The properties assumed be most important for this generation (saturation magnetization, amplitude and frequency external field) originate from theoretical models that assume non-interacting nanoparticles. Although these factors certainly contribute, fundamental assumption 'no interaction' is...

Neutron powder diffraction was used to determine changes in the nuclear and magnetic structures of Bi1−xNdxFeO3 polymorphs involved first-order displacive phase transitions from high-temperature nonpolar low temperature polar (x ≤ 0.125) antipolar (0.125 x 0.25) phases, respectively. The (O1), which crystallizes with a structure similar room-temperature form NdFeO3, exhibits Pbnm symmetry unit cell √2ac × 2ac (where ac ≈ 4 Å is lattice parameter an ideal cubic perovskite), determined by...

Ceramic ${\text{Bi}}_{1\ensuremath{-}x}{\text{Nd}}_{x}{\text{FeO}}_{3}$ solid solutions in the approximate compositional range $0.15\ensuremath{\le}x\ensuremath{\le}0.25$ undergo first-order antiferroelectric $(\text{AFE})\ensuremath{\leftrightarrow}\text{paraelectric}$ (PE) phase transitions between $300\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C}$ and room temperature. The orthorhombic AFE ($Pnam$,...

Biocompatible magnetic nanoparticles are interesting tracers for diagnostic imaging techniques, including resonance and particle (MPI). Here, we will present our studies of the physical especially properties dextran coated multicore iron oxide nanoparticles, with promising high MPI signals revealed by spectroscopy (MPS) measurements. The Nanomag-MIP particles a hydrodynamic diameter 106 nm show an increase MPS amplitude factor about two at 3rd harmonic, as compared to Resovist. In...

Magnetic nanoparticles provide a unique combination of small size and responsiveness to magnetic fields making them attractive for applications in electronics, biology, medicine. When exposed alternating fields, can generate heat through loss power mechanisms that continue challenge complete physical description. The influence internal nanoparticle (intracore) domain structure on relaxation remains unexplored. Within the context potential biomedical applications, this study focuses dramatic...

Recently it was discovered that van der Waals bonded magnetic materials retain long range ordering down to a single layer, opening many avenues in fundamental physics and potential applications of these fascinating materials. One such material is $\mathrm{FeP}{\mathrm{S}}_{3}$, large spin $(S=2)$ Mott insulator where the Fe atoms form honeycomb lattice. In bulk, $\mathrm{FeP}{\mathrm{S}}_{3}$ has been shown be quasi-two-dimensional-Ising antiferromagnet, with additional features Raman...

Magnetic nanoparticles with a high specific absorption rate (SAR) have been developed and used in mouse models of cancer. The magnetic are comprised predominantly iron oxide cores surrounded by dextran layer for colloidal stability. average diameter single particle (core plus dextran) is 92±14nm as measured photon correlation spectroscopy. Small angle neutron scattering measurements under several H2O∕D2O contrast conditions at varying nanoparticle concentrations revealed three length scales:...

Thermodynamic versus kinetic control: Small-angle neutron scattering (SANS) and single-crystal X-ray diffraction data have been used to elucidate the effect of temperature, solvent, metal identity on formation dimeric or hexameric metal-seamed pyrogallol[4]arene capsules. Higher temperatures, methanol solution, use nickel favor dimer (see scheme). Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited typeset....

Magnetic nanoparticles are promising new tools for therapeutic applications, such as magnetic nanoparticle hyperthermia therapy and targeted drug delivery. Recent in vitro studies have demonstrated that a force application with tweezers can also affect cell fate, suggesting potential magnetically modulated mechanical stimulation. The properties of induce physical responses the subtle result from mechanically induced membrane damage and/or intracellular signaling evaluated. particles various...

Utrophin is a ubiquitously expressed cytoskeletal protein which an important structural component of the mammalian neuromuscular junction. It shows extensive sequence similarity to dystrophin leading postulation that utrophin may be able compensate for absence in Duchenne muscular dystrophy (DMD) patients. In order study transcriptional control expression including its regulation at junction, and as first step development potential DMD therapy, we have cloned promoter region from human...

The structure and properties of the ferromagnet ${\mathrm{Tb}}_{1\ensuremath{-}x}{\mathrm{Dy}}_{x}{\mathrm{Fe}}_{2}$ are explored through morphotropic phase boundary (MPB) separating ferroic phases differing symmetry. Our synchrotron data support a first order structural transition, with broadening MPB width at higher temperatures. optimal point for magnetomechanical applications is not centered on but lies rhombohedral side, where high striction majority combines softened anisotropy MPB. We...

Magnetic drug targeting requires particles to move through the complex viscoelastic environments of tissues and biological fluids. However, these often inhibit particle motion, making it difficult for magnetically guided reach their intended targets. microrods are easy grow manipulate, but experience significant hindrance transport in complex, tortuous, tissue-like environments. Simple magnetic force translation ("pulling" or "pushing") is insufficient inefficient long-range such Designing...

Holographic photopolymerization is a flexible, simple, one-step technique to create defect-free, sub-micrometer patterns of particles over large dimensions. These permanent structures can be formed in matter seconds. The resulting Bragg gratings exhibit substantial diffraction efficiencies. Figure shows cross-sectional fracture surface transmission grating using clay powder.

Magnetic nanoparticles are being developed for a wide range of biomedical applications. In particular, hyperthermia involves heating the magnetic through exposure to an alternating field. These materials offer potential selectively treat cancer by tissue locally and at cellular level. This may be successful method if there enough particles in tumor possessing sufficiently high specific absorption rate (SAR) deposit heat quickly while minimizing thermal damage surrounding tissue. High SAR...

Cylindrical ferromagnetic nanowires encapsulated inside multiwalled carbon nanotubes (MWNTs) are synthesized by pyrolyzing either ferrocene powder or ferrocene–toluene mixtures. By changing the way precursor is thermolyzed, we have been able to control composition of byproducts. In particular, noted coexistence α-Fe and Fe3C phases when only theromolyzed in an inert atmosphere. However, toluene–ferrocene solutions sprayed nanocrystals produced. Magnetic measurements aligned containing these...

Abstract Multifunctional materials composed of ultrathin magnetic films with perpendicular anisotropy combined ferroelectric substrates represent a new approach toward low power, fast, high density spintronics. Here we demonstrate Co/Ni multilayered tunable saturation magnetization and grown directly on PZT [Pb(Zr 0.52 Ti 0.48 )O 3 ] substrate plates. Electric fields up to ±2 MV/m expand the by 0.1% generate at least 0.02% in-plane compression in film. Modifying strain voltage can reduce...

The influence of grain constraint on the magnetic field levels required to complete isothermal martensitic transformation in shape memory alloys has been demonstrated for a NiCoMnSn alloy, and magnetocaloric performance an optimally heat treated alloy was quantified. Ni45CoxMn45-xSn10 melt spun ribbons with x = 2, 4, 5, 6 were characterized. 5 sample determined exhibit lowest thermal hysteresis (7 K) temperature range during from paramagnetic austenite non-magnetic martensite, as well large...

A spin-wave Doppler technique is used to measure the temperature dependence of both magnetization drift velocity, which represents magnitude adiabatic spin-transfer torque, and current polarization in current-carrying ${\text{Ni}}_{80}{\text{Fe}}_{20}$ wires. For densities ${10}^{11}\text{ }\text{A}/{\text{m}}^{2}$, we obtain velocities decreasing from $4.8\ifmmode\pm\else\textpm\fi{}0.3$ $4.1\ifmmode\pm\else\textpm\fi{}0.1\text{ }\text{m}/\text{s}$ over a range 80 340 K. Interpretation...

The magnetic behavior of nickel-seamed C-propylpyrogallol[4]arene dimeric and hexameric nanocapsular assemblies has been investigated in the solid state using a SQUID magnetometer. These capsular entities show differentiation both terms moment per nanocapsule potential antiferromagnetic interactions within individual nanocapsules. weak observed at low temperatures indicates dipolar between neighboring nickel atoms; however, this effect is higher assembly. differences dimer versus hexamer can...

The differences in magnetic properties of metal-based nanometric assemblies are due to distinct contributions from host-guest interactions, structural integrity, and interactions. To disentangle these contributions, it is necessary control the self-assembly process that forms entities. Herein we study effect host-to-guest ratios identify remarkably different structural-magnetic C-methylpyrogallol[4]arene⊂ferrocene/(PgC1)2⊂Fc dimers vs (PgC1)3⊂Fc nanotubes. At low temperature, a weak...