Magnetic manipulation systems designed to date have typically relied on either stationary electromagnetswhich facilitate straightforward real-time control, but result in large and complex systemsor slowly moving permanent magnetswhich generate strong fields, but are typically controlled in a quasistatic fashion. In the Telerobotics Lab at the University of Utah, we are exploring the use of smal...

Modifying the curvature in magnetic nanostructures is a novel and elegant way toward tailoring physical phenomena at the nanoscale, allowing one to overcome limitations apparent in planar counterparts. Here, we address curvature-driven changes of static magnetic properties in cylindrically curved magnetic segments with different radii of curvature. The curved architectures are prepared by cappi...

A magnetically–structured accretion disk corona, generated by buoyancy instability in the disk, can account for observations of flare–like events in Active Galactic Nuclei. We examine how Petschek magnetic reconnection, associated with MHD turbulence, can result in a violent release of energy and heat the magnetically closed regions of the corona up to canonical X-ray emitting temperatures. X-r...

A magnetically-driven method for controlling nanodimensional porosity in sol-gel-derived metal–oxide films, including TiO2, Al2O3, and SnO2, coated onto ferromagnetic amorphous substrates, such as the magnetically-soft Metglas alloys, is described. On the basis of the porous structures observed dependence on external magnetic field, a model is suggested to explain the phenomena. Under well-defi...

An efficient and convenient approach towards the synthesis of nitrogen fused imidazoheterocycles through double C-N bond formation in a single step has been achieved with a good range of substituted phenacyl bromides in the presence of magnetically recoverable Fe3O4 as a green heterogeneous nanocatalyst. The present approach was found to be environmentally benign and econo...

M. H. Jung,* A. Alsmadi, H. C. Kim, Yunkyu Bang, K. H. Ahn, K. Umeo, A. H. Lacerda, H. Nakotte, H. C. Ri, and T. Takabatake National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003, USA Material Science Laboratory, Korea Basic Science Institute, Taejeon 305-333, Kor...

In biological systems, nanoscale molecular motors can generate forces from spontaneous reactions of energy-rich molecules, mostly adenosine triphosphate (ATP), to convert chemical energy into mechanical movement. These motors are roughly 10 nm in size, take steps of a few nanometers, and can exert forces in the piconewton range. [ 1 , 2 ] However, to effi ciently design and construct nanoscale ...

We present a class of magnetically charged brane solutions for the theory of EinsteinMaxwell gravity with a negative cosmological constant in d ≥ 4 spacetime dimensions. ∗email: [email protected]

We review recent observational results which suggest that magnetically channeled accretion in T Tauri stars is a highly time dependent process on timescales ranging from hours to months.