Omega-morphology

The morphology of silver nanopartilces on the cotton surface and paint samples was observed by field emission scanning electron microscopy (FE-SEM JSM-6700F, JEOL, Japan). The size and shape of the nanoparticles in solution were determined with transmission electron microscopy (TEM) (LEO-912-OMEGA, Carl Zeiss, Germany). 

The change in morphology of crystals of zeolite omega has been analyzed with respect to the evolution of the concentration of aluminium in the parent liquor. In agreement with the overlapping principle, crystal habit is determined by the faces with the lowest growing rate. 

The morphology of the nanocomposites was studied by transmission electron microscopy TEM using LEO 912AB OMEGA instmment. The size distribution of nanoparticles was figured out by statistical treatment of 50-100 particle size. 

Melucci, M., G. Barbarella, M. Zambianchi, M. Benzi, F. Biscarini, M. Cavallini, A. Bongini, S. Fabbroni, M. Mazzea, M. Anni, and G. Gigli. 2004. Poly(alpha-vinyl-omega-alkyloligothiophene) side-chain polymers. Synthesis, fluorescence, and morphology. Macromolecules 37 5692-5702. 

Fig. 17. Single helical lamellar crystal morphology of the nonracemic chiral main-chain polyester synthesized from )-4 - omega-[2-(p-hydroxy-o-nitrophenyloxy)-l-...

Isothermal omega (cOiso) forms during aging (at temperatures up to about 475 °C, or 890 °F) for alloys containing intermediate amounts of beta stabilizers. Ellipsoidal and cuboidal morphologies have been observed, depending on the misfit between the coherent C0is<, precipitates and the beta matrix. The stability of (Oiso depends on the relative concentration of alpha and beta stabilizers such as aluminum and vanadium (see Fig. 7). 

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