Transmission Kikuchi diffraction (TKD) is a diffraction
technique applied to quantitatively characterize the microstructure of
crystalline, electron transparent, samples in the scanning electron microscope
(SEM). It was first proposed in 2012 by Keller and Geiss  and it has attracted
attention of scientists from a variety of fields. Recently we have been able to
investigate individual nanoparticles using TKD and correlate their individual microstructure
with their hydrogen absorption and desorption properties. The work has resulted in a fundamental
understanding of the role of grain boundaries in the hydrogen-induced phase
transition during hydride formation and decomposition.
The goal of the current project is to correlate the
microstructure of Cu nanoparticles with their oxidation and reduction properties.
To that end, transmission Kikuchi diffraction will be used to map the
microstructure of individual particles. Since the diffraction signal is
strongly related to the material density and thickness, a detailed parameter
study will be necessary to obtain the desired characterization.
 R. r Keller and R. h Geiss,
“Transmission EBSD from 10 nm domains in a scanning electron microscope,” J.
Microsc., vol. 245, no. 3, pp. 245–251, Mar. 2012.
 S. Alekseeva, A. B. da S. Fanta, B.
Iandolo, T. J. Antosiewicz, F. A. A. Nugroho, J. B. Wagner, A. Burrows, V. P.
Zhdanov, and C. Langhammer, “Grain boundary mediated hydriding phase
transformations in individual polycrystalline metal nanoparticles,” Nat.
Commun., vol. 8, no. 1, p. 1084, Dec. 2017.
I samarbejde medChristoph Langhammer, Sara Nilsson