Abstract
Abstract The use of 3D-TEM, in particular electron tomography, for the characterisation of mesoporous materials is introduced. In 3D-TEM a tilt series of the specimen collected in bright field mode comprises typically 150 images over tilt angles ranging from -70°C to +70°C. The tilt series are used to calculate a full 3D- image reconstruction of the specimen in question. The first example delt with comprises the study of zeolite Y crystals that contain mesopores. The pore shape, size and connectivity of the zeolite Y crystal is obtained with great clarity and detail. The second example involves SBA-15 materials. The curved nature of the pores in the particles of SBA-15 is clearly demonstrated from tilt series.
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