Atomic Diffusion in Glasses Studied with Coherent X-Rays
Correlation functions were obtained following the analysis described in ref. Oxides glasses were measured at room temperature while Cu 65 Zr This situation can be achieved by working at high temperature in the glassy state, where metallic glasses display stationary dynamics, likely related to an intermittent mechanism of aging At lower temperatures the dynamics is dominated by the typical fast aging of rapidly quenched metallic glasses 17 , 21 making the test extremely challenging as it would be difficult to disentangle X-rays induced effects and spontaneous changes of the decay time related to aging.
Sci Rep. Published online Jun PMID: Zontone , 1 Y. Chushkin , 1 G. Baldi , 3 G. Pintori , 3 G. Monaco , 3 B. Kob 4. Ruta, Email: rf. Corresponding author. Received Mar 29; Accepted May This article has been cited by other articles in PMC. Abstract Nowadays powerful X-ray sources like synchrotrons and free-electron lasers are considered as ultimate tools for probing microscopic properties in materials. Introduction Usually the interaction between X-rays and matter is weak and therefore they are an excellent probe to study the properties of materials 1.
Results The effect of hard X-rays on the atomic motion of a given material can be studied by comparing dynamical measurements taken for different sample positions and incoming intensities selected by inserting X-ray attenuators along the beam path. Open in a separate window.
Table of contents
Figure 1. Figure 2. Figure 3. Figure 4. Discussions The intriguing findings described above suggest the existence of a surprising system-dependent material-radiation interaction which can completely alter the outcome of an experiment and great care should be taken when analyzing X-ray data.
In the case of in vitreous SiO 2 and GeO 2 , the interaction with X-rays leads to a dynamic process whose main features can be summarized as follows: i. The incident X-ray flux induces an atomic motion at temperatures well below T g. The time scale for this motion is inversely proportional to the photon flux. No decorrelation is observed if the system is not irradiated at least on the scale of hours.
At fixed flux, the dynamics remains stationary and is independent of the accumulated dose. The decay time depends in a reversible way and almost instantaneously on the incident flux. The shape of the correlation functions is independent of the flux and should therefore reflect an intrinsic property of the glass. The flux does not affect the wave-vector dependence of the decay time at least for intermediate and small Qs. The described induced dynamics is observed for simple oxide glasses. Different glasses display distinct behaviours, in that, for instance, metallic glasses are not affected by the X-rays.
Methods Sample preparation Samples of the oxide glasses were prepared in the form of disks of 5 mm diameter by cutting bulk material with a diamond drill bit. Electronic supplementary material Supplementary Information K, pdf. Acknowledgements Prof. Author Contributions B. Notes Competing Interests The authors declare that they have no competing interests. Footnotes Electronic supplementary material Supplementary information accompanies this paper at doi References 1. Baruchel, J. Wang J, et al. Radiation damage in soft X-ray microscopy. Teng T, Moffat K.
Primary radiation damage of protein crystals by an intense synchrotron X-ray beam. Gonzalez A, Nave C. Radiation damage in protein crystals at low temperature. Acta Cryst. Weik M, et al. X-ray radiation produces specific chemical and structural damage to protein structures. Ravelli RBG, et al. Holton JM. Howells MR, et al. An assessment of the resolution limitation due to radiation-damage in X-Ray diffraction microscopy.
Potential for biomolecular imaging with femtosecond X-ray pulses. Chapman HN, et al. Femtosecond X-ray protein nanocrystallography. Griscom DL. Nature of defects and defect generation in optical glasses. The Displacement of Atoms in Solids by Radiation. Leitner, M. Acceleration of atomic dynamics due to localized energy depositions under X-ray irradiation. Madsen, A. Atomic diffusion studied with coherent x-rays.
Ruta B, et al.
Atomic Diffusion in Glasses Studied with Coherent X-Rays
Atomic-scale relaxation dynamics and aging in a metallic glass probed by x-ray photon correlation spectroscopy. Huang PH, et al. Revealing the fast atomic motion of network glasses. Direct observation of atomic network migration in glass. New J. Giordano VM, Ruta B.
Unveiling the structural arrangements responsible for the atomic dynamics in metallic glasses during physical aging. Evenson Z, et al. Scudino S, et al. Length scale-dependent structural relaxation in Zr Alloys Compd. Welch RC, et al. Dynamics of Glass Relaxation at Room Temperature. Malik A, et al. Cipelletti L, et al. Universal non-diffusive slow dynamics in aging soft matter. Faraday Discuss. Relaxation in yield stress systems through elastically interacting activated events. Arbe A, Colmenero J. Busselez R, et al. The non-Gaussian dynamics of glycerol.
Dolle FE, et al. X-ray irradiation induces local rearrangement of silica particles in swollen rubber. Vodnala P, et al. Radiation damage limits to XPCS studies of protein dynamics. AIP Conf. Radiation Effects in Ceramics. Nuclear Mat. X-ray photon correlation spectroscopy reveals intermittent aging dynamics in a metallic glass. Compressed correlation functions and fast aging dynamics in metallic glasses.
Shpyrko O. X-ray photon correlation spectroscopy. Diffraction-limited storage rings — a window to the science of tomorrow. Free-Electron Lasers: Status and Applications.
Studies of atomic diffusion in Ni-Pt solid solution by x-ray photon correlation spectroscopy
X-ray spectroscopy: Revealing the atomic dance. Carnis J, et al. Springer Theses Free Preview. Nominated as an outstanding Ph. Buy eBook. Buy Hardcover. Buy Softcover. FAQ Policy.
vitaxhospitality.com/libraries/map20.php About this book This thesis provides the first successful study of jump diffusion processes in glasses on the atomic scale, utilizing a novel coherent technique. Show all. Theory Pages Ross, Manuel. Experimental Pages Ross, Manuel.