The organic functional groups of polysaccharides (3,289.97, 1,584.72, and 1,045.23 cm-1 so on) were measured by IR spectroscopy. 
IR spectroscopy
The PNP was a semi-crystalline or non-crystalline substance, possessed a three-dimensional lump structure with a smooth, dense surface and amorphous structure according to the scanning electron microscopy and XRD images. 
scanning electron microscopy
The PNP was a semi-crystalline or non-crystalline substance, possessed a three-dimensional lump structure with a smooth, dense surface and amorphous structure according to the scanning electron microscopy and XRD images. 
XRD images
Moreover, the PNP was chain or bright-spot structures formed by the entanglement of multiple polysaccharide fibers on the basis of atomic force microscopy. 
atomic force microscopy