1. Wood Materials Science, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich, Switzerland and
2. Applied Wood Materials, EMPA − Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
3. Scientific Centre for Optical and Electron Microscopy (ScopeM), ETH Zürich, Auguste-Piccard-Hof 1, 8093 Zürich, Switzerland