Materials science

South Pole Telescope helps Argonne scientists study earliest ages of the universeOctober 28, 2013

For Argonne physicist Clarence Chang, looking backward in time to the earliest ages of the universe is all in a day’s work.

Self-Terminating Growth of Ultrathin Platinum Films by Electrochemical Deposition
The growth of ultrathin Pt films on a low-cost substrate would be an effective way for preparing catalysts of ultrahigh Pt utilization and potentially improved activities. However, it is nontrivial to grow two-dimensional (2-D) Pt thin films because of high energy barriers that hinder the interlayer diffusion of Pt adatoms. In this talk, a detailed account will be given for the development of a new electrochemical method, as recently shown, rendering the growth of 2-D Pt films from a NaCl-supported K2PtCl4 electrolyte by using a potential-pulse deposition scheme.
Containment Unidirectional Resource Loading System (CURLS)

Glovebox "tunnel" that allows easy, rapid changeover of resources without losing containment

Spin-polarized Scanning Tunneling Microscopy Investigations of Nanospintronic Systems
Abstract:
There are many interesting and unanswered questions within magnetic/spintronic material systems which are ideally investigated using a hybrid approach consisting of UHV scanning tunneling microscopy and molecular beam epitaxy (MBE/STM). Further, by adding spin functionality to the STM tip, it is possible to study spin-polarized (SP) structures via SP-STM down to atomic scales. I will illustrate the power of our approach via our recent work on magnetic spin pyramids, discuss new developments within my labs, and show where we are going next with our research.

Nanoelectrofuels for Flow Batteries

Four-page technical brochure about Argonne's high-density rechargeable liquid fuel

Nonlinear Light-matter Interaction in Photonic Crystals

Solitons, Plasma and Singlephoton Sources

Abstract:
Photonic crystals (PhC), are periodic dielectric media that possess photonic band gaps, a frequency range in which certain light wavelengths, or colors, are forbidden. These ordered materials are the optical equivalent to electronic semiconductors, such as silicon, that pervade our daily lives.