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Alfred Larsson. Portrait.

Alfred Larsson

Postdoctoral fellow

Alfred Larsson. Portrait.

Anisotropic strain variations during the confined growth of Au nanowires

Author

  • Giuseppe Abbondanza
  • Andrea Grespi
  • Alfred Larsson
  • Lorena Glatthaar
  • Tim Weber
  • Malte Blankenburg
  • Zoltan Hegedüs
  • Ulrich Lienert
  • Herbert Over
  • Edvin Lundgren

Summary, in English

The electrochemical growth of Au nanowires in a template of nanoporous anodic aluminum oxide was investigated in situ by means of grazing-incidence transmission small- and wide-angle x-ray scattering (GTSAXS and GTWAXS), x-ray fluorescence (XRF), and two-dimensional surface optical reflectance. The XRF and the overall intensity of the GTWAXS patterns as a function of time were used to monitor the progress of the electrodeposition. Furthermore, we extracted powder diffraction patterns in the direction of growth and in the direction of confinement to follow the evolution of the direction-dependent strain. Quite rapidly after the beginning of the electrodeposition, the strain became tensile in the vertical direction and compressive in the horizontal direction, which showed that the lattice deformation of the nanostructures can be artificially varied by an appropriate choice of the deposition time. By alternating sequences of electrodeposition with sequences of rest, we observed fluctuations of the lattice parameter in the direction of growth, attributed to stress caused by electromigration. Furthermore, the porous domain size calculated from the GTSAXS patterns was used to monitor how homogeneously the pores were filled.

Department/s

  • LU Profile Area: Light and Materials
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • Synchrotron Radiation Research
  • NanoLund: Centre for Nanoscience
  • LTH Profile Area: Photon Science and Technology

Publishing year

2023

Language

English

Publication/Series

Applied Physics Letters

Volume

122

Issue

12

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Materials Chemistry

Status

Published

ISBN/ISSN/Other

  • ISSN: 0003-6951