1. Laboratory for Nanometallurgy Department of Materials ETH Zürich Vladimir‐Prelog‐Weg 1‐5/10 Zürich 8093 Switzerland
2. Scientific Center for Optical and Electron Microscopy (ScopeM) ETH Zürich Otto‐Stern‐Weg 3 Zürich 8093 Switzerland
3. Department of Materials Science and Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA