Environmental Molecular Sciences Laboratory

A DOE Office of Science User Facility

This page lives in the old site. Check out our new site here.

Spectroscopy and Diffraction

Molecular level solid-, liquid- and gas-interactions can be investigated through structural, chemical and compositional analysis with remarkable atomic scale spatial and high-energy resolution spectrometers and diffractometers for novel fundamental research. See a complete list of Spectroscopy and Diffraction instruments.

Resources and Techniques

  • Electron spectroscopy
  • Electron backscatter diffraction
  • Atom probe tomography
  • Ion/molecular beam spectroscopy
  • 57Fe-Mössbauer spectroscopy
  • Optical spectroscopy
  • X-ray tomography and diffractometers

Additional Information:

Description

Capability Details

  • Electron spectrometers with high spatial and energy resolution in-situ and ex-situ x-ray photoelectron spectroscopy
  • Secondary ion mass spectrometers with single and cluster ion sources, and time-of-flight and magnetic mass analyzers
  • Electron microscopes with energy dispersive X-ray spectroscopy, electron energy loss spectroscopy and electron backscatter diffraction
  • Local Electrode Atom Probe tomography system with 355 nm UV laser and reflectron flight path for high mass resolution
  • Fourier transform infrared spectrometers with vacuum bench and variable temperature capability
  • Confocal-Raman, cryogenic time-resolved fluorescence, circular dichroism, stopped-flow absorbance, laser-induced breakdown and sum frequency generation optical tools
  • Variable temperature Mössbauer spectroscopy systems for bulk (transmission mode) and surface (emission) measures
  • X-ray diffraction instruments with sealed tube or rotating anode for analysis of powder, thin film and single crystal samples; point, CCD and image plate detection. X-ray computed tomography with 225- and 320-kV fixed, and 225-kV rotating target options using a 2000x2000 pixel area detector and state-of-the-art processing and visualization software

Electron spectroscopy – Achieving nanoscale spatial resolution, users can study elemental composition, structural properties, and chemical states of materials with applications to thin films, nanomaterials, catalysis, biological and environmental sciences, corrosion, and atmospheric aerosols.

Electron backscatter diffraction – Samples of microstructures in environmental and material science can be examined with three dimensional reconstruction and characterization using focused ion beam-electron backscatter diffraction analysis.

Atom probe tomography – Atom Probe Tomography (APT) provides comprehensive and accurate three dimensional chemical imaging for characterization of both metallic materials and low electrical conductivity materials, such as semiconductors, oxides, carbides, nitrides and composites.

Ion/molecular beam spectroscopy – Secondary ions and scattered ions from various materials are analyzed in straight, magnetic or time-of-flight mass spectrometers to investigate elemental, isotopic and molecular compositions through surface spectra, one dimensional depth profiling and two dimensional and three dimensional chemical imaging.

57Fe-Mössbauer spectroscopy – Using 57Fe (a versatile, highly sensitive, and stable isotope with natural abundance of 2.2%), users can obtain information about the valence state, coordination number and magnetic ordering temperatures for a wide range of Fe-containing samples; (e.g., Fe-organic matter complexes, sediments, catalysts, glass materials).

Optical spectroscopy – Fluorimetry, stopped-flow absorbance, FTIR and confocal-Raman tools enable analysis for biology, radiochemistry, and catalysis. Sum frequency generation-vibrational spectroscopy and second harmonic generation are available to study liquid, liquid and solid, and liquid interfaces.

X-ray tomography and diffractometers – X-ray computed tomography delivers images of microstructures (components, pore structure and connectivity) in biological and geological samples at tens of microns spatial resolution. General purpose and specialized x-ray diffraction systems, including single-crystal, microbeam and variable temperature powder capabilities, empower phase analysis of polycrystalline, epitaxial thin films, protein structure determination, and studies of problematic small inorganic molecules.

Instruments

The atmospheric pressure reactor system is designed for testing the efficiency of various catalysts for the treatment of gas-phase pollutants. EMSL...
This unique instrument is capable of measuring gas/solid reaction rates under realistic, high-pressure (∼1 atm) conditions using model, low-surface...
Custodian(s): Janos Szanyi
EMSL's non-thermal interfacial reactions instrumentation is available for use in research directed toward understanding non-thermal interfacial...
Custodian(s): Greg Kimmel
The SMSAS is a multi-technique surface analysis instrument based on elemental mapping using either scanning small spot X-rays or the electronics in...
Custodian(s): Shuttha Shutthanandan
A Bruker Fourier Transform Infrared (FTIR) spectrometer (IFS66/S) with visible, near- and mid-infrared (IR) capabilities is available at EMSL. It is...
Custodian(s): Zheming Wang

Publications

The growth rate of crystalline ice in amorphous solid water (ASW) films was investigated using reflection absorption infrared spectroscopy (RAIRS)....
The interaction of carbon dioxide (CO2) with a graphene covered Pt(111) surface was investigated using temperature programmed desorption (TPD) and...
Desorption of carbon tetrachloride from beneath an amorphous solid water (ASW) overlayer is explored utilizing a combination of temperature...
The electron-stimulated sputtering of thin amorphous solid water films deposited on Pt(111) is investigated. The sputtering appears to be dominated...
The adsorption, desorption, and displacement kinetics of H2O and CO2 on TiO2(110) are investigated using temperature programmed desorption (TPD) and...

Science Highlights

Posted: June 26, 2020
The Science A team of scientists examined organic matter stabilization processes in alkaline soils and found that most of the organic matter was...
Posted: May 18, 2020
As our reliance on rechargeable batteries increases, scientists at Pacific Northwest National Laboratory (PNNL), EMSL, and the General Motors...
Posted: May 05, 2020
Per- and polyfluoroalkyl substances (PFAS) are hazardous, artificial chemicals used in products to repel water and oils. PFAS accumulate in humans...
Posted: February 05, 2020
The arrangement of the atoms and their isotopes affects the performance and safety of nuclear fuel when in a reactor. Unfortunately, we do not...
Posted: July 25, 2019
The Science Inert gases like argon typically do not form chemical bonds except under extreme conditions, such as the icy cold of outer space. As...

Instruments

We propose to investigate solution phase species and chemistry in the gas phase using a recently developed low-temperature photoelectron spectrometer...
We propose to investigate solution phase species and chemistry in the gas phase using a recently developed low-temperature photoelectron spectrometer...

Molecular level solid-, liquid- and gas-interactions can be investigated through structural, chemical and compositional analysis with remarkable atomic scale spatial and high-energy resolution spectrometers and diffractometers for novel fundamental research. See a complete list of Spectroscopy and Diffraction instruments.

Resources and Techniques

  • Electron spectroscopy
  • Electron backscatter diffraction
  • Atom probe tomography
  • Ion/molecular beam spectroscopy
  • 57Fe-Mössbauer spectroscopy
  • Optical spectroscopy
  • X-ray tomography and diffractometers

Additional Information:

Attachments: 

Pages

Leads

Dr. Bowden manages EMSL's optical spectroscopy and diffraction, subsurface flow and transport, and microfabrication and deposition capabilities. He is responsible for the X-ray diffraction facility and assists or conducts measurement and analysis...