Polyvinylidene fluoride molecules in nanofibers, imaged at atomic scale by aberration corrected electron microscopy.

@article{Lolla2016PolyvinylideneFM,
  title={Polyvinylidene fluoride molecules in nanofibers, imaged at atomic scale by aberration corrected electron microscopy.},
  author={Dinesh Lolla and Joseph. Gorse and Christian Kisielowski and Jiayuan Miao and Philip L. Taylor and George G. Chase and Darrell H. Reneker},
  journal={Nanoscale},
  year={2016},
  volume={8 1},
  pages={
          120-8
        }
}
Atomic scale features of polyvinylidene fluoride molecules (PVDF) were observed with aberration corrected transmission electron microscopy. Thin, self-supporting PVDF nanofibers were used to create images that show conformations and relative locations of atoms in segments of polymer molecules, particularly segments near the surface of the nanofiber. Rows of CF2 atomic groups, at 0.25 nm intervals, which marked the paths of segments of the PVDF molecules, were seen. The fact that an electron… 

Figures from this paper

Local Structure and Bonding of Carbon Nanothreads Probed by High-Resolution Transmission Electron Microscopy.

High-resolution electron microscopy (HREM) images of hexagonal arrays of well-aligned thread columns that traverse the 80-100 nm thickness of the prepared sample reveal nanothreads to be primarily sp3-hybridized, with less than 27% sp2 carbon, most likely associated with partially saturated "degree-4" threads.

Polarized Catalytic Polymer Nanofibers

Hydrogenation of phenol was studied as a model to test the effectiveness of polarized PVDF nanofiber support embedded with agglomerated palladium (Pd) metallic nanoparticle diameters, and showed that the fibers mats heated to their curie temperature increased the catalytic activity and decreased the selectivity.

Fabrication, Polarization of Electrospun Polyvinylidene Fluoride Electret Fibers and Effect on Capturing Nanoscale Solid Aerosols †

The results showed negligible polarization loss for the 200-nm fiber sample, and the polarized mats had the highest filter efficiencies and lowest pressure drops.

Detecting structural variances of Co3O4 catalysts by controlling beam-induced sample alterations in the vacuum of a transmission electron microscope

This article summarizes core aspects of beam-sample interactions in research that aims at exploiting the ability to detect single atoms at atomic resolution by mid-voltage transmission electron

On the pressing need to address beam–sample interactions in atomic resolution electron microscopy

Undeniably, the characterization of solids at the atomic scale using electron beams has become a core aspect of materials sciences. In fact, current abilities of advanced electron microscopes read

Functionalized Polyvinylidene Fluoride Electrospun Nanofibers and Applications

Electrospun polymeric nanofibers with flexible three-dimensional porous structures and high surface-to-volume ratio are potential resources for several novel applications in the fields of micro- and

Effects of Amino-Functionalized Carbon Nanotubes on the Crystal Structure and Thermal Properties of Polyacrylonitrile Homopolymer Microspheres

The results suggested that the incorporation of amino-CNTs into the PAN homopolymer matrix was beneficial for controlling the heat released during the stabilization processing.

References

SHOWING 1-10 OF 24 REFERENCES

High resolution electron microscopy of ordered polymers and organic molecular crystals: Recent developments and future possibilities

High Resolution Electron Microscopy (HREM) has made it possible to directly image the detailed organization of a variety of polymers and organic molecular crystals. For organic materials it is

Direct observation of crystal defects in an organic molecular crystals of copper hexachlorophthalocyanine by STEM-EELS

The structural analysis of crystal defects in organic thin films provides fundamental insights into their electronic properties for applications such as field effect transistors. Observation of

Molecular Orientation in Electrospun Poly(vinylidene fluoride) Fibers.

Electrospun poly(vinylidene fluoride) (PVDF) nanofibers were collected on aluminum foil across a 10 mm gap. Scanning electron microscopy (SEM) images showed that fibers in the gap were

Free-floating ultrathin two-dimensional crystals from sequence-specific peptoid polymers.

The aqueous self-assembly of two peptoid polymers into extremely thin two-dimensional crystalline sheets directed by periodic amphiphilicity, electrostatic recognition and aromatic interactions is presented.

Effects of Polymorphism and Crystallite Size on Dipole Reorientation in Poly(vinylidene fluoride) and Its Random Copolymers

Poly(vinylidene fluoride) (PVDF) and poly(VDF-co-hexafluoropropylene) [P(VDF−HFP)] films having different polymorphisms and crystallite sizes but a similar crystal orientation (i.e., c-axes parallel

Electrospun polymer nanofibres with small diameters.

Electrospinning of a concentrated solution of as high as 20% nylon-4,6 by weight in formic acid produced a ribbon-like electrospun fibre with a ribbon width of about 850 nm, while a semi-dilute concentration of 2% nylon, 6 by weight produced the thinnest nanofibres with diameters of 1.6 nm or less.