Mr. Goldfinger

Biological samples are usually non-conductive and need a thin layer of gold or gold-paladium on top. Image: © Martin Oeggerli / ® Micronaut.ch 2008. 

critical step during CPD

Critical Point Drying (CPD) has his perfidies, e.g. the pressure must be released very very carefully... Image: © Martin Oeggerli / ® Micronaut 2008.