Chemical characterization of electrospun nanofibers

Influence of deposited amine‐functionalized Si‐MCM‐41 in polyacrylonitrile electrospun membranes applied for separation of water in oil emulsions

“…The PAN membranes and the surface‐decorated membranes were characterized on their morphologies by SEM technique and the results are shown in Figure 2. From recent development in the electrospinning of various polymers, 33 and from our preliminary work, 10 wt% of the polymer to DMF was identified as an acceptable spinning solution to obtain the continuous and bead free fibers (Figure 2(a)). The fiber diameters size of the undecorated membranes was determined to measure ≈ 300 nm.…”

Simultaneous hydrogen and oxygen evolution reactions using free-standing nitrogen-doped-carbon–Co/CoOx nanofiber electrodes decorated with palladium nanoparticles

“…Generally, N-CNF show two main peaks: the broad D band (1300 cm − 1 ; amorphous carbon) and the G band (1600 cm − 1 ; ordered graphitic structure). 72 The relative intensities (R) of these two bands (ID/IG) are positively influenced by the number of amorphous carbon (disordered sp 2 ) and graphitic layers (ordered sp 2 bonding carbon atoms). 65 The D (∼1320 cm −1 ) and G (~1590 cm −1 ) bands were detected in all analyzed electrode samples (Figure 3c).…”

Infrared nanospectroscopy depth-dependent study of modern materials: morpho-chemical analysis of polyurethane/fibroin binary meshes

“…conventional spectroscopies, do not typically reach the spatial resolution needed for single nano-fiber detection and could only look at composites as quasi-homogeneous materials. 7,8 In the present study, we propose the use of nano-resolved IR microscopy, namely infrared scattering-type scanning near field optical microscopy (IR s-SNOM), supported by micro Attenuated Total Reflection (ATR) Fourier Transform Infrared (FTIR) imaging, to address the study of a binary fibrous material named Silkothane®. 9 In Silkothane® the combination of natural silk fibroin (SF) and synthetic medical grade polyurethane (PU) proved to be highly suitable for TE applications.…”