Recently, the applications of transmission electron microscopy (TEM) related techniques have extended from ex situ nanoscale characterization of structure and chemistry of products to dynamic measurements of reaction processes. Commercially available modified TEM specimen holders and TEM column are being routinely employed to follow the structural and chemical changes at elevated temperatures and even under controlled atmosphere. Experiments performed under these rigorous conditions require careful considerations to avoid undesirable effects or contamination's from TEM grids and/or holder. The reactivity of sample, grid, holder and gaseous environments must be evaluated for each reactions process. This tutorial is aimed to outline the important factors that should be considered for experimental set up for in situ observations to make sure the results are comparable to the ones obtained during ex situ experiment under same conditions.
Pub Type: Journals
In situ TEM, environmental scanning transmission electron microscope (ESTEM), catalysis, nanowires, nanotubes