Structure determination of Pt-coated Au dumbbells via fluctuation X-ray scattering

Gang Chen, Miguel Modestino, Billy K. Poon, André Schirotzek, Stefano Marchesini, Rachel A. Segalman, Alexander Hexemer, Peter H. Zwart

Research output: Contribution to journalArticle

Abstract

A fluctuation X-ray scattering experiment has been carried out on platinum-coated gold nanoparticles randomly oriented on a substrate. A complete algorithm for determining the electron density of an individual particle from diffraction patterns of many particles randomly oriented about a single axis is demonstrated. This algorithm operates on angular correlations among the measured intensity distributions and recovers the angular correlation functions of a single particle from measured diffraction patterns. Taking advantage of the cylindrical symmetry of the nanoparticles, a cylindrical slice model is proposed to reconstruct the structure of the nanoparticles by fitting the experimental ring angular auto-correlation and small-angle scattering data obtained from many scattering patterns. The physical meaning of the refined structure is discussed in terms of their statistical distributions of the shape and electron density profile.

Original languageEnglish (US)
Pages (from-to)695-700
Number of pages6
JournalJournal of Synchrotron Radiation
Volume19
Issue number5
DOIs
StatePublished - Sep 2012

Fingerprint

X ray scattering
Nanoparticles
angular correlation
nanoparticles
Diffraction patterns
Carrier concentration
diffraction patterns
scattering
Scattering
x rays
electron density profiles
statistical distributions
Autocorrelation
autocorrelation
Platinum
platinum
Gold
gold
rings
symmetry

Keywords

  • fXS
  • SAXS
  • WAXS

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics
  • Radiation

Cite this

Chen, G., Modestino, M., Poon, B. K., Schirotzek, A., Marchesini, S., Segalman, R. A., ... Zwart, P. H. (2012). Structure determination of Pt-coated Au dumbbells via fluctuation X-ray scattering. Journal of Synchrotron Radiation, 19(5), 695-700. https://doi.org/10.1107/S0909049512023801

Structure determination of Pt-coated Au dumbbells via fluctuation X-ray scattering. / Chen, Gang; Modestino, Miguel; Poon, Billy K.; Schirotzek, André; Marchesini, Stefano; Segalman, Rachel A.; Hexemer, Alexander; Zwart, Peter H.

In: Journal of Synchrotron Radiation, Vol. 19, No. 5, 09.2012, p. 695-700.

Research output: Contribution to journalArticle

Chen, G, Modestino, M, Poon, BK, Schirotzek, A, Marchesini, S, Segalman, RA, Hexemer, A & Zwart, PH 2012, 'Structure determination of Pt-coated Au dumbbells via fluctuation X-ray scattering', Journal of Synchrotron Radiation, vol. 19, no. 5, pp. 695-700. https://doi.org/10.1107/S0909049512023801
Chen G, Modestino M, Poon BK, Schirotzek A, Marchesini S, Segalman RA et al. Structure determination of Pt-coated Au dumbbells via fluctuation X-ray scattering. Journal of Synchrotron Radiation. 2012 Sep;19(5):695-700. https://doi.org/10.1107/S0909049512023801
Chen, Gang ; Modestino, Miguel ; Poon, Billy K. ; Schirotzek, André ; Marchesini, Stefano ; Segalman, Rachel A. ; Hexemer, Alexander ; Zwart, Peter H. / Structure determination of Pt-coated Au dumbbells via fluctuation X-ray scattering. In: Journal of Synchrotron Radiation. 2012 ; Vol. 19, No. 5. pp. 695-700.
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