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Femtosecond X-ray protein nanocrystallography
X-ray crystallography provides the vast majority of macromolecular structures, but the success of the method relies on growing crystals of sufficient size. In conventional measurements, the necessaryExpand
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Identification of isotopically primitive interplanetary dust particles: A NanoSIMS isotopic imaging study
We have carried out a comprehensive survey of the isotopic compositions (H, B, C, N, O, and S) of a suite of interplanetary dust particles (IDPs), including both cluster and individual particles.Expand
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Comet 81P/Wild 2 Under a Microscope
The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatileExpand
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Organics Captured from Comet 81P/Wild 2 by the Stardust Spacecraft
Organics found in comet 81P/Wild 2 samples show a heterogeneous and unequilibrated distribution in abundance and composition. Some organics are similar, but not identical, to those in interplanetaryExpand
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X-ray microprobe analysis of iron oxidation states in silicates and oxides using X-ray absorption near edge structure (XANES)
Abstract Initial results are reported on a new microprobe technique for determining Fe 3+ ∑Fe ratios in Fe-bearing minerals. The technique is based on the energy shift of a pre-edge peak in X-rayExpand
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We analyzed two ultracarbonaceous interplanetary dust particles (IDPs) and two cometary Wild 2 particles with infrared spectroscopy. We characterized the carrier of the 3.4 μm band in these samplesExpand
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Femtosecond time-delay X-ray holography
Extremely intense and ultrafast X-ray pulses from free-electron lasers offer unique opportunities to study fundamental aspects of complex transient phenomena in materials. Ultrafast time-resolvedExpand
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Turning solid aluminium transparent by intense soft X-ray photoionization
The first experimental demonstration of saturable absorption in core-electron transitions in aluminium paves the way for investigating warm dense matter, which potentially has an important role inExpand
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Carbon and Nitrogen Isotopic Anomalies in an Anhydrous Interplanetary Dust Particle
Because hydrogen and nitrogen isotopic anomalies in interplanetary dust particles have been associated with carbonaceous material, the lack of similar anomalies in carbon has been a major conundrum.Expand
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An Astronomical 2175 Å Feature in Interplanetary Dust Particles
The 2175 angstrom extinction feature is the strongest (visible-ultraviolet) spectral signature of dust in the interstellar medium. Forty years after its discovery, the origin of the feature and theExpand
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