Fig. 5
From: Automated analysis of evolving interfaces during in situ electron microscopy
Beam-mediated etching of gold nanorods (nominally 50 × 80 nm) suspended in water (pH ~7) with trace amounts of the surfactant cetrimonium bromide (CTAB) and chloroauric acid. Imaging was carried with a FEI Quanta 600 in STEM mode (30 keV) beam currents of 0.07 nA, beam radius of ~1 nm resulting in a time average dose rate of 7.4 × 106 (Gy/s) or 2 (e−/Å2-s). a An image sequence of a gold nanorod dissolution. The images are binarized and superposed with the minimum bounding box (green). The box vertices are shown in red. b–d Particle aspect ratio, perimeter, and inclination angle from initial orientation, respectively, as a function of frame number