Materials science

Supra-molecular Architectures at Surfaces for Probing Structure, Electron and Spin States
Abstract:
Well defined electronic and spintronic interfaces can be architectured by combining self-assembly and surface science. The atomically clean metal surface in the ultra-high vacuum provides a very specific environment affecting the behaviour of the ad-molecules as well as the adsorbent-adsorbate interaction. Depending on the bonding at the interface, complex electronic and magnetic interaction can occur which can be explored using spectro-microscopy correlation, in this case photoemission and photoabsorption spectroscopy (PES, PAS) and Scanning Tunnelling Microscopy (STM).
Rationally-designed Iron Oxide Nanoparticles as Efficient MRI Contrasts Agents
Abstract:
Magnetic Resonance Imaging (MRI) offers a powerful, non-invasive tool for brain tumor imaging and therapy monitoring. The use of contrast agents significantly enhances the image contrasts, yielding better resolution. T1 positive contrast agents are mainly paramagnetic Gadolinium (Gd) complexes, which shorten the longitudinal relaxation time (T1) and generate a brighter image. T2 negative contrast agents, primarily superparamagnetic iron oxide nanoparticles, produce a darker image by shortening the transverse relaxation time (T2).
Silver linings: Argonne scientists are first to grow graphene on silverFebruary 24, 2014

Researchers discover a new method to growing graphene on silver opening the door to new physics and device applications.

It’s alive: Scientists combine bacteria with liquid crystalsFebruary 24, 2014

Argonne scientists have grown bacteria in a liquid crystal medium and observed unique patterns of bacterial motion.

Emergence of Charge Density Wave Domain Walls Above the Superconducting Dome in TiSe2
Abstract:
Superconductivity (SC) in so-called unconventional superconductors is nearly always found in the vicinity of another ordered state, such as antiferromagnetism, charge density wave (CDW), or stripe order. This suggests a fundamental connection between SC and fluctuations in some other order parameter. 1T-TiSe2 is a prototypical CDW material in the transition-metal dichalcogenide family and was previously shown to exhibit SC when the CDW is suppressed by hydrostatic pressure or intercalation of Cu atoms.