Three-dimensional chemical mapping by scanning transmission X-ray spectromicroscopy.
Three-dimensional (3-d) chemical mapping using angle-scan tomography in a scanning transmission X-ray microscope is demonstrated. Apparatus, experimental procedures and data processing are presented and the 3-d spatial resolution is evaluated. The technique is illustrated using mapping of a low-density acrylate polyelectrolyte in and outside of polystyrene microspheres dispersed in water in a 4 microm-diameter microcapillary. The 3-d chemical visualization provides information about the microstructure that had not previously been observed.
Johansson
Göran A
GA
Department of Chemistry and BIMR, McMaster University, Hamilton, Canada L8S 4M1. gajonsson@lbl.gov
Tyliszczak
Tolek
T
Mitchell
Gary E
GE
Keefe
Melinda H
MH
Hitchcock
Adam P
AP