Fig. 1: Cryo-FIB specimen preparation and Cryo-APT analysis of altered glass.
From: Tomographic mapping of the nanoscale water-filled pore structure in corroded borosilicate glass
a Cryo-FIB prepared cross section SEM image of glass particle embedded in water ice. Scale bar = 3 µm. b Specimen shaped into needle morphology prior to APT analysis with the relevant regions labeled. Scale bar = 500 nm. c Selected region of mass spectrum showing major ions detected. Water and hydrated Si-oxide are highlighted in blue. d APT reconstruction shown as an 8 nm thick slice. Only Si and HXO1+ ions with x = 2 and 3 are shown for visual clarity of the glass/gel heterointerphases. Scale bar = 10 nm. e APT reconstruction shown with the water-rich region and Si-rich regions outlined by a 4 at. % H2O isoconcentration surface. Scale cube is 10 × 10 × 10 nm3.
