Fig. 1: Synthesis of GB-rich nanoassemblies.
From: Grain boundary engineering for efficient and durable electrocatalysis
a Illustration depicting the formation of GB-rich Au NAs through the collision, attachment, and coalescence of NPs’ surfaces devoid of capping agents facilitated by H2 gas bubbling. b High resolution HAADF-STEM micrograph of the GBs between the Au NP building blocks within H-Au NAs. c HAADF-STEM image and (d) grain orientation maps from the corresponding 4D-STEM dataset for H-Au NAs. The inset shows the color code for the out-of-plane coordinates. e Histogram plots of the GB types derived from ~600 GBs in the 4D-STEM data. LAGB refers to low-angle GBs with a misorientation of less than 15 degrees, while HAGB denotes high-angle GBs with a misorientation exceeding 15 degrees. Source data are provided as a Source Data file.
