Nanofibers were electrospun from gelatin and chitosan at different mass ratios<br /> (gelatin/chitosan: 0/100, 25/75, 50/<br /> 50, 75/25, 100/0). Atomic forcemicroscopy (AFM) combined with scanning<br /> electronmicroscopy (SEM)was utilized<br /> in this study to evaluate the morphological and mechanical properties of the gelatin–chitosan nanofibers. The SEM<br /> images showed that the electrospun gelatin–chitosan nanofibers possessed more uniform morphologies than the<br /> pure gelatin or chitosan nanofibers. Moreover, AFM-HarmoniX mode was used to quantitatively assess the Derjaguin–<br /> Müller–Toporov (DMT) modulus of gelatin–chitosan nanofibers. After modified by two correction factors,<br /> the DMTmodulus of gelatin–chitosan nanofibers showed higher values than the pure gelatin or chitosan nanofibers,<br /> which indicated the existence of intermolecular interaction within the electrospun gelatin–chitosan nanofibers.<br /
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