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Showing 1–9 of 9 results
Advanced filters: Author: Stefan P. Hau-Riege Clear advanced filters

  • High-speed imaging gives us a fascinating insight into ultrafast changes in materials. By combining the speed of optical pulses and the short wavelength of X-ray pulses, imaging with 50-nm spatial and 10-ps temporal resolution is possible, with scope to go much further.

    • Anton Barty
    • Sébastien Boutet
    • Henry N. Chapman
    Research
    Nature Photonics
    Volume: 2, P: 415-419

  • A modern version of Newton's 'dusty 'mirror' experiment is made, whereby X-ray pulses are focused on a thin membrane with polystyrene particles placed in front of an X-ray mirror. After a pulse traverses through the sample, triggering the explosion of a particle, it is reflected back on to the sample by the mirror to probe this reaction. The resulting diffraction pattern contains accurate time and spatially resolved information about the exploding particles.

    • Henry N. Chapman
    • Stefan P. Hau-Riege
    • Janos Hajdu
    Research
    Nature
    Volume: 448, P: 676-679

  • X-ray Fourier transform holography using free-electron lasers has the potential to enable nanoscale imaging on the timescale of atomic motion. A technique that dramatically increases the efficiency of this technique could move us a step towards such imaging.

    • Stefano Marchesini
    • Sébastien Boutet
    • Marvin M. Seibert
    Research
    Nature Photonics
    Volume: 2, P: 560-563

  • The start-up of the new femtosecond hard X-ray laser facility in Stanford, the Linac Coherent Light Source, has brought high expectations for a new era for biological imaging. The intense, ultrashort X-ray pulses allow diffraction imaging of small structures before radiation damage occurs. This new capability is tested for the problem of structure determination from nanocrystals of macromolecules that cannot be grown in large crystals. Over three million diffraction patterns were collected from a stream of nanocrystals of the membrane protein complex photosystem I, which allowed the assembly of a three-dimensional data set for this protein, and proves the concept of this imaging technique.

    • Henry N. Chapman
    • Petra Fromme
    • John C. H. Spence
    Research
    Nature
    Volume: 470, P: 73-77

  • The start-up of the new femtosecond hard X-ray laser facility in Stanford, the Linac Coherent Light Source, has brought high expectations for a new era for biological imaging. The intense, ultrashort X-ray pulses allow diffraction imaging of small structures before radiation damage occurs. This new capability is tested for the problem of imaging a non-crystalline biological sample. Images of mimivirus are obtained, the largest known virus with a total diameter of about 0.75 micrometres, by injecting a beam of cooled mimivirus particles into the X-ray beam. The measurements indicate no damage during imaging and prove the concept of this imaging technique.

    • M. Marvin Seibert
    • Tomas Ekeberg
    • Janos Hajdu
    Research
    Nature
    Volume: 470, P: 78-81

  • Femtosecond X-ray pulses were used to obtain diffraction data on photosystem II, revealing conformational changes as the complex transitions from the dark S1 state to the double-pumped S3 state; the time-resolved serial femtosecond crystallography technique enables structural determination of protein conformations that are highly prone to traditional radiation damage.

    • Christopher Kupitz
    • Shibom Basu
    • Petra Fromme
    Research
    Nature
    Volume: 513, P: 261-265