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Title: High-energy X-ray focusing and applications to pair distribution function investigation of Pt and Au nanoparticles at high pressures

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep21434· OSTI ID:1259266
 [1];  [2];  [3];  [3];  [4];  [1]
  1. Stony Brook Univ., NY (United States). Mineral Physics Institute
  2. Stony Brook Univ., NY (United States). Mineral Physics Institute; Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  4. Princeton Univ., NJ (United States). Dept. of Geosciences

We report development of micro-focusing optics for high-energy x-rays by combining a sagittally bent Laue crystal monchromator with Kirkpatrick-Baez (K–B) X-ray focusing mirrors. The optical system is able to provide a clean, high-flux X-ray beam suitable for pair distribution function (PDF) measurements at high pressure using a diamond anvil cell (DAC). A focused beam of moderate size (10–15 μm) has been achieved at energies of 66 and 81keV. PDF data for nanocrystalline platinum (n-Pt) were collected at 12.5 GPa with a single 5 s X-ray exposure, showing that the in-situ compression, decompression, and relaxation behavior of samples in the DAC can be investigated with this technique. PDFs of n-Pt and nano Au (n-Au) under quasi-hydrostatic loading to as high as 71GPa indicate the existence of substantial reduction of grain or domain size for Pt and Au nanoparticles at pressures below 10 GPa. In conclusion, the coupling of sagittally bent Laue crystals with K–B mirrors provides a useful means to focus high-energy synchrotron X-rays from a bending magnet or wiggler source.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-98CH10886; NSF EAR 11-57758
OSTI ID:
1259266
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (3)

Relativistic calculations on the ${{\rm{K}}}_{\alpha }$ x-ray satellites of platinum with multiply ionized L shell journal November 2018
A simple correction for the parallax effect in X-ray pair distribution function measurements journal September 2019
A simple correction for the parallax effect in X-ray pair distribution function measurements text January 2019

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