Materials science

Magnetic Nanowires: Revolutionizing Hard Drives, RAM and Cancer Treatment

Magnetic nanowires can have many names: bits, sensors, heads, artificial cilia, sensors, and nano-bots. These applications require nanometer control of dimensions, while incorporating various metals and alloys. To realize this control, our 7- to 200-nm diameter nanowires are synthesized within insulating matrices by direct electrochemistry, which negates sidewall damage such as that caused by lithographical patterning of vacuum-deposited structures.

Quantum Quench Dynamics in Spin and Topological Systems

Quantum quench dynamics involves the evolution of a system wherein a parameter of its underlying Hamiltonian is dynamically tuned. Such dynamics is particularly sensitive to out-of-equilibrium effects when the quench passes through a critical point associated with a phase transition and it is dominated by critical properties. Typically, the quench results in excitations or defects that respect a power-law dependence with respect to how rapidly the quench is performed, known as Kibble-Zurek behavior.

Fast Times and Hot Spots in Plasmonic NanostructuresAugust 3, 2015

Light-matter interactions in metallic nanosystems is governed by the collective oscillation of their surface electrons – or plasmons. The ability to control the ultrafast (femtoseconds) response of metal nanostructures was achieved by introducing and tailoring plasmonic hot spots.

Bend me, shape me, any way you want me: Scientists curve nanoparticle sheets into complex formsJuly 31, 2015

Scientists have been making nanoparticles for more than two decades in two-dimensional sheets, three-dimensional crystals and random clusters. But they have never been able to get a sheet of nanoparticles to curve or fold into a complex three-dimensional structure. Now researchers from the University of Chicago, the University of Missouri and Argonne have found a simple way to do exactly that.