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 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.

University of Chicago Lab Schools Tour at ChemMatCARS

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On February 28, 2017, ChemMatCARS participated in hosting a tour for second- year chemistry students from the University of Chicago Lab Schools, along with BioCARS and GSECARS.  Students were given a brief overview of APS, followed by an overview of CARS by Mark Rivers.  After the introductions, students were separated into two groups and given brief presentations by Wei Bu and Suyin Wang about liquid surface and crystallography techniques used here at ChemMatCARS.

ChemMatCARS welcomes International Student Visitor,
Tieyan Chang


Tieyan Chang is a visiting Ph.D. candidate from Xi’an Jiaotong University in China.  Tieyan’s studies focus on phase transition in magnetic materials and the magnetostriction in the vicinity of morphotropic phase boundary in ferromagnetic systems.  While here at ChemMatCARS he is exploring crystal structure change during ferromagnetic phase transition using high-resolution single crystal diffraction and charge density under Dr. Yu-Sheng Chen’s direction.  Tieyan arrived at ChemMatCARS January 11, 2017 and will be staying until September 2018.

Welcome Tieyan!

Congratulations to ChemMatCARS user
William Rock!


William Rock (left) pictured with Deputy Lab Director at ANL, Al Sattelberger (right)

Congratulations to William Rock on being one of five, 1st place poster award winners selected at Argonne’s ninth annual Postdoctoral Research and Career Symposium.  The event was held in Fall 2016, and displayed the scientific research of post-doctorate scientists, engineers, and graduate students.  The Symposium creates a networking atmosphere and connects industry and government recruiters with brilliant individuals across the nation.  Posters were judged based on overall appearance and quality, topic organization, clarity and significance of illustrations, and knowledge of topic.  William  studies interfacial reactions involved in the chemical separation of heavy metals.  At Sector 15, he uses grazing incidence diffraction (GID) to probe monolayer surfaces as well as anomalous x-ray reflectivity and x-ray fluorescence spectroscopy to study the structure of heavy metals at the interface.  William’s winning poster presentation was entitled, Molecular-Scale Investigation of Anion Adsorption Competition at a Charged Langmuir Monolayer

Congratulations William!  You’ve done a phenomenal job!

Click here to see the Argonne Today post!

Symposium in honor of Professor Philip Coppens retirement

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Professor Philip Coppens

From the initial planning phases in 1994 to the approval of the final design in 1996, Professor Philip Coppens played a key role in the development of the crystallographic component of the ChemMatCARS beamline. He was the ideal candidate to lead the project, given his cutting-edge crystallographic research and his early advocacy of synchrotron-based techniques that arose from his involvement with the SUNY beamline at the NSLS in Brookhaven.  Thanks to his leadership as co-PI and his service on the scientific advice committee, the ChemMatCARS advanced crystallography program at the Advanced Photon Source remains a premier global facility for experiments involving time-resolved X-ray diffraction and high-accuracy charge density measurements. In honor of his retirement, a symposium titled, Advancing Structural Science: Pushing the Limits of X-ray Crystallography” will be held on October 22, 2016 at The University at Buffalo, SUNY campus in Buffalo, New York.  

Click here for schedule of events and map!   

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.