Abstract
The state of the art in imaging organic molecules with STM and AFM is discussed on the basis of selected examples. For large biological samples the problems of sample preparation and possible artifacts have yet to be solved in order to produce valuable new scientific results. Preliminary results on larger objects like human chromosomes are presented. Clearcut experimental results are obtained when small organic molecules from ordered surface layers on a crystalline substrate. Examples of two dimensional arrays of small organic molecules like liquid crystals and DNA bases on these substrates are shown.
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