title: Field ion microscopical imaging of biomolecules.
abstract: specimen molecules are protected from field desorption by embedding them in a platinum matrix, with the use of electrolytic codeposition on tungsten tips. High-resolution helium ion images are obtaind when the biomolecules are exposed during gradual removal of surface layers by controlled field evaporation. Structured images of individual molecules of coenzyme I and vitamin B(12)are seen.
mesh_terms: D000327:Adsorption; D004563:Electrochemistry; D008853:Microscopy; D009243:NAD; D010984:Platinum; D014805:Vitamin B 12
chemical_list: D009243:NAD; D010984:Platinum; D014805:Vitamin B 12