Imaging Method
Electron-beam surface analysis generates high-resolution pictures of the topography of natural and synthetic fibers. In scanning electron microscopy, a focused beam of electrons sweeps across the sample surface to capture detailed secondary and backscattered electron signals. This method allows researchers to study the fine structures of fibers at magnifications far exceeding those of light microscopes.
It provides three-dimensional images that highlight the surface scale patterns and surface degradation of the fibers under test.
Specimen Preparation
Samples are mounted on metal stubs using conductive adhesive tape and coated with a thin layer of gold or carbon. This coating prevents electrical charging and ensures that the electrons are scattered evenly from the surface. This preparation step must be completed carefully to avoid introducing surface defects.
Fiber Inspection
Technicians examine the scale height and surface roughness of wool to differentiate it from cashmere. Synthetic fibers are checked for cross-sectional shapes and the presence of titanium dioxide delustrant particles on the surface. This analysis is crucial for verifying fiber identity in premium wool blends.
Diagnostic Advantage
Detailed surface views allow the analyst to identify fiber damage caused by chemical or mechanical treatments. Fractured fiber ends or chemical erosion of the scale layer are easily detected using this high-magnification method. This inspection provides definitive evidence of the quality and structural integrity of processed yarns.
