𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Transmission electron microscopy of fine aromatic hydrocarbon particles

✍ Scribed by M Sengoku; S Sawai; T Ohno

Book ID
104368942
Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
142 KB
Volume
32
Category
Article
ISSN
0968-4328

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✦ Synopsis

Fine perylene and pyrene particles were produced by evaporation in helium gas. The particles were sensitive to electron beam radiation. The pyrene particles sublimed under observation. These difficulties were cleared up by reducing electron beam exposure and sandwiching a specimen between two Formvar films. The fine perylene particles were rectangular or hexagonal plates about 50nm thick. The size was about 200-2000nm. The fine pyrene particles were polymorphic with a size of about 300-2000nm. The crystal forms of the perylene and pyrene particles were determined from the electron diffraction patterns to be alpha-perylene and pyrene I, respectively.

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