Atomic Diffusion in Glasses Studied with Coherent X-Rays

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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.

We acknowledge H. Vitoux, K. We gratefully thank A. Madsen and M. Di Michiel for fruitful discussions. Electronic supplementary material. Supplementary information accompanies this paper at doi Publisher's note: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Europe PMC requires Javascript to function effectively. Recent Activity. The snippet could not be located in the article text. This may be because the snippet appears in a figure legend, contains special characters or spans different sections of the article.

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.

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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.

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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.

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Atomic Diffusion in Glasses Studied with Coherent X-Rays

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Diffusion Weighted Imaging

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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. 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.