Effect of Applied Voltage and Needle Size on Morphology of polyamide-6.6 Nanofiber Formed by Electro spinning Technique

Nylon-6/6 continuous Polymer nanofibers (NF) were produced by using conventional single needle electrosprinng (ES) technique. In this paper several parameters, such as applied voltage and needle diameter were investigated to optimize fiber morphology. The morphological and structure properties of the fiber (average diameter, height, length, surface roughness and fiber shape) are visualized by Atomic Force Microscopy (AFM). Good alignment of polymer nanofibres was confirmed by AFM and optical microscopy observations. We concluded that fiber diameter increases with decreasing applied voltage intensity and increasing the distance between the electrodes.

Study of Islands Formation and Growing in thin films by AFM

In this paper we present a study of ZnS thin films thermally deposited on glass substrates, with different optical thicknesses. On topography micrographs and feature parameters obtained by Atomic Force Microscope, we pursued the islands formation and growing in ZnS thin films even on the same optical thickness of the film. For doing so, we analyzed the micrographs surface, using Watershed Segmentation and Wolf pruning that allow the detection of significant features on surfaces, Grain sorting operator and Parameter Distribution Study.