Dedicated to static and dynamic condensed matter chemistry and materials science. Learn More About ChemMatCARS


Used to investigate dynamical and structural properties of surfaces and interfaces in a variety of liquid and solid systems. Learn More About Liquid Surface At ChemMatCARS

Liquid Surface/Interface X-ray Scattering

Uses a "rapid setup" crystallography facility that allows us to rapidly switch operation to the single-crystal instrument. Learn More About Crystallography At ChemMatCARS

Advanced Crystallography


ChemMatCARS operates three experimental stations in the areas of advanced small-molecule crystallography, liquid surface and interface scattering, and ultra-small to wide-angle scattering at the Advanced Photon Source (APS), the premier undulator-based synchrotron source of high-brilliance high-energy x-rays in the U.S.A. The instrumentation at ChemMatCARS provides information that addresses a broad range of issues in chemistry and materials research.

2016 ChemMatCARS Faculty Development Summer Research Program


ChemMatCARS is sponsoring a summer research experience program for faculty of Minority Serving Institutions (MSIs) at Sector 15, the Advanced Photon Source, Argonne National Labs.  The aim of this program is to foster research collaborations between ChemMatCARS and MSI faculty.  Call for proposals for the 2016 summer program can be found here , and interested faculty members should submit a proposal by January 20, 2016, 5:00 p.m. CST.

Harold Brewer Retires after 23 Years with CARS

After 23 years working for CARS, Harold Brewer, the Mechanical Group Supervisor, has retired on September 30th.  Friends and colleagues from GSECARS, BioCARS, ChemMatCARS, and APS, including many former CARS employees, came together to celebrate Harold’s accomplishments at CARS and to wish him a very happy beginning to a new page in life.  Joining us was Harold's wife June, his daughters Elizabeth and Sarah, and his son Harrison.

Current CARS director, Mark Rivers, along with former CARS directors Jim Viccaro and Keith Moffat, all praised Harold highly for his significant contributions to CARS over the past two decades.  Harold will be greatly missed by his CARS colleagues and friends!


Scientific Focus

The scientific focus of user activities at ChemMatCARS is the study of structure and dynamics over the range of length scales from atomic and molecular to mesoscopic. The experimental techniques available to the scientific community span a spatial resolution of sub-angstrom to micrometer and a time resolution from 50 ns to minutes. These include:

High Precision Crystallography to study charge (i.e., electron) densities, bonding, microcrystals, resonant diffraction, high-pressure (up to 10 GPa) single crystal diffraction, and transient state/photo-crystallography.

Scattering From Liquid Surfaces and Liquid-Liquid Interfaces to measure atomic, molecular, and mesoscopic ordering at interfaces using resonant and non-resonant reflectivity, grazing-incidence diffraction and small angle scattering, surface fluorescence, surface diffuse scattering, and fast techniques, such as grazing incidence diffraction in the 1D pinhole geometry.

Small and wide-angle x-ray scattering (SAXS/WAXS) to probe ordering in bulk materials on angstrom to micrometer length scales.