Swift heavy ion irradiation of Pt nanocrystals: II. Structural changes and H desorption

R. Giulian; L. L. Araujo; P. Kluth; D. J. Sprouster; C. S. Schnohr; A. P. Byrne; M. C. Ridgway

doi:10.1088/0022-3727/44/15/155402

Swift heavy ion irradiation of Pt nanocrystals: II. Structural changes and H desorption

R. Giulian^*, L. L. Araujo, P. Kluth, D. J. Sprouster, C. S. Schnohr, A. P. Byrne, M. C. Ridgway

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The structural properties and H desorption from embedded Pt nanocrystals (NCs) following irradiation with swift heavy ions were investigated as a function of energy and fluence. From x-ray absorption near-edge spectroscopy analysis, Pt-H bonding was identified in NCs annealed in a forming gas (95% N₂ + 5% H₂) ambient. The H content decreased upon irradiation and the desorption process was NC-size dependent such that larger NCs required a higher fluence to achieve a H-free state. Pt-H bonding and NC dissolution both perturbed the NC structural parameters (coordination number, bond-length and mean-square relative displacement) as determined with extended x-ray absorption fine structure measurements.

Original language	English
Article number	155402
Journal	Journal Physics D: Applied Physics
Volume	44
Issue number	15
DOIs	https://doi.org/10.1088/0022-3727/44/15/155402
Publication status	Published - 20 Apr 2011

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title = "Swift heavy ion irradiation of Pt nanocrystals: II. Structural changes and H desorption",

abstract = "The structural properties and H desorption from embedded Pt nanocrystals (NCs) following irradiation with swift heavy ions were investigated as a function of energy and fluence. From x-ray absorption near-edge spectroscopy analysis, Pt-H bonding was identified in NCs annealed in a forming gas (95% N2 + 5% H2) ambient. The H content decreased upon irradiation and the desorption process was NC-size dependent such that larger NCs required a higher fluence to achieve a H-free state. Pt-H bonding and NC dissolution both perturbed the NC structural parameters (coordination number, bond-length and mean-square relative displacement) as determined with extended x-ray absorption fine structure measurements.",

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T2 - II. Structural changes and H desorption

AU - Giulian, R.

AU - Araujo, L. L.

AU - Kluth, P.

AU - Sprouster, D. J.

AU - Schnohr, C. S.

AU - Byrne, A. P.

AU - Ridgway, M. C.

PY - 2011/4/20

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N2 - The structural properties and H desorption from embedded Pt nanocrystals (NCs) following irradiation with swift heavy ions were investigated as a function of energy and fluence. From x-ray absorption near-edge spectroscopy analysis, Pt-H bonding was identified in NCs annealed in a forming gas (95% N2 + 5% H2) ambient. The H content decreased upon irradiation and the desorption process was NC-size dependent such that larger NCs required a higher fluence to achieve a H-free state. Pt-H bonding and NC dissolution both perturbed the NC structural parameters (coordination number, bond-length and mean-square relative displacement) as determined with extended x-ray absorption fine structure measurements.

AB - The structural properties and H desorption from embedded Pt nanocrystals (NCs) following irradiation with swift heavy ions were investigated as a function of energy and fluence. From x-ray absorption near-edge spectroscopy analysis, Pt-H bonding was identified in NCs annealed in a forming gas (95% N2 + 5% H2) ambient. The H content decreased upon irradiation and the desorption process was NC-size dependent such that larger NCs required a higher fluence to achieve a H-free state. Pt-H bonding and NC dissolution both perturbed the NC structural parameters (coordination number, bond-length and mean-square relative displacement) as determined with extended x-ray absorption fine structure measurements.

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DO - 10.1088/0022-3727/44/15/155402

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VL - 44

JO - Journal Physics D: Applied Physics

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Swift heavy ion irradiation of Pt nanocrystals: II. Structural changes and H desorption

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