Environmental Molecular Sciences Laboratory

A DOE Office of Science User Facility

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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

More details available soon.
Custodian(s): Mark Bowden
The atmospheric pressure reactor system is designed for testing the efficiency of various catalysts for the treatment of gas-phase pollutants. EMSL...
The LEAP® 4000 XHR local electrode atom probe tomography instrument enabled the first-ever comprehensive and accurate 3-D chemical imaging studies of...
Custodian(s): Daniel Perea
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

Publications

Bimetallic Ni-Pd and monometallic reference catalysts were prepared by decomposing organometallic precursors, Ni(cod)2 and Pd2(dba)3, leading to...
During batch-to-glass conversion, the glass-forming melt connects, creating a foam layer between the batch and glass melt. Due to its transient...
Real-time monitoring of combustion products and composition is critical to emission reduction and efficient energy production. The fuel efficiency in...
This guide deals with methods to control surface charging during XPS analysis of insulating samples and approaches to extracting useful binding...
Intrinsic properties of a compound (e.g. electronic structure, crystallographic structure, optical and magnetic properties) define notably its...

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

The reverse water-gas shift (RWGS) can be understood as a model reaction to probe the properties of heterogeneous catalysts, besides it can be a way...
Biomineralization is the process used by living organism to produce minerals with properties not always found in their equivalent inorganically...
The overall objective of this study is to further investigate our recent catalyst innovation enabling the selective, single-step conversion of bio-...
The overall objective of this study is to further investigate a recent catalyst innovation enabling the selective, single step conversion of bio-...
This research is part of an international collaborative effort to address the wide diversity of environmental roles that radionuclides can play...

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...