> Details

Kaganer, Vladimir M. [Author]; Konovalov, Oleg V. [Author]; Fernández-Garrido, Sergio [Author]; 2European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38043Grenoble, France [Author]; 1Paul-Drude-Institut für Festkörperelektronik, Leibniz-Institut im Forschungsverbund Berlin e. V., Hausvogteiplatz 5-7, 10117Berlin, Germany [Author]

Small‐angle X‐ray scattering from GaN nanowires on Si(111): facet truncation rods, facet roughness and Porod's law

Reference
management

Bookmarks

Remove from
bookmarks

Share this on Whatsapp

Close

Bookmarks



You can manage bookmarks using lists, please log in to your user account for this.
  • Media type: E-Article
  • Title: Small‐angle X‐ray scattering from GaN nanowires on Si(111): facet truncation rods, facet roughness and Porod's law
  • Contributor: Kaganer, Vladimir M. [Author]; Konovalov, Oleg V. [Author]; Fernández-Garrido, Sergio [Author]; 2European Synchrotron Radiation Facility, 71 avenue des Martyrs, 38043Grenoble, France [Author]; 1Paul-Drude-Institut für Festkörperelektronik, Leibniz-Institut im Forschungsverbund Berlin e. V., Hausvogteiplatz 5-7, 10117Berlin, Germany [Author]
  • imprint: International Union of Crystallography; 5 Abbey Square, Chester, Cheshire CH1 2HU, England, 2020-12-24
  • Language: English
  • DOI: https://doi.org/10.1107/S205327332001548X
  • Keywords: nanowires ; SAXS ; grazing‐incidence small‐angle X‐ray scattering ; Porod's law ; small‐angle X‐ray scattering ; GISAXS ; facet truncation rods
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: Small‐angle X‐ray scattering from GaN nanowires grown on Si(111) is measured in the grazing‐incidence geometry and modelled by means of a Monte Carlo simulation that takes into account the orientational distribution of the faceted nanowires and the roughness of their side facets. It is found that the scattering intensity at large wavevectors does not follow Porod's law I(q) ∝ q−4. The intensity depends on the orientation of the side facets with respect to the incident X‐ray beam. It is maximum when the scattering vector is directed along a facet normal, reminiscent of surface truncation rod scattering. At large wavevectors q, the scattering intensity is reduced by surface roughness. A root‐mean‐square roughness of 0.9 nm, which is the height of just 3–4 atomic steps per micrometre‐long facet, already gives rise to a strong intensity reduction. ; The intensity of small‐angle X‐ray scattering from GaN nanowires on Si(111) depends on the orientation of the side facets with respect to the incident beam. This reminiscence of truncation rod scattering gives rise to a deviation from Porod's law. A roughness of just 3–4 atomic steps per micrometre‐long side facet notably changes the intensity curves. image
  • Access State: Open Access