Ex situ and in situ advanced electron microscopy of enzymatic action for biomass tailoring and transport paths in conducting fibres and yarns

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The structure of wood is complex with many components. As new cellulose-based materials and devices are to be developed and optimized it is crucial to understand the material microstructure of wood and also the properties of its individual microstructural constituents. Electron microscopy offers a unique capability for site specific imaging, diffraction and spectroscopy with high  spatial  resolution.  For  transmission electron  microscopes  (TEMs)  the  resolution  can  be better than 1 Ångström, i.e. we can resolve details smaller than the diameter of an atom. The limitation  for  the  studies  of  plant  cells  and  cellulose  is  the  low  contrast  between  different features in the structures, the sensitivity of the materials to the electron beam and the presence of water in pristine structures. The Eva Olsson group has a research profile working on direct correlation  between  local  structure  and  properties.  Interfaces  are  of  particular  interest  due  to their significant influence on the properties and microstructural evolution. The main research tool is electron microscopy and in situ techniques. We have established extensive knowledge about imaging, diffraction and spectroscopy of polymer thin films also including the specimen preparation.  In  addition,  we  have  developed  methods  for  in  situ  studies  of  the  interaction  of water and soft matter in the environmental scanning electron microscope.

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