Nanoscale interfibrillar adhesion in UHMWPE fibers

Interfibrillar stiffening of echinoderm mutable collagenous tissue demonstrated at the nanoscale.

The mutable collagenous tissue (MCT) of echinoderms (e.g., sea cucumbers and starfish) is a remarkable example of a biological material that has the unique attribute, among collagenous tissues, of being able to rapidly change its stiffness and extensibility under neural control. However, the mechanisms of MCT have not been characterized at the nanoscale. Using synchrotron small-angle X-ray diff...

Drawing Behavior of Ultrahigh Molecular Weight Polyethylene (uhmwpe) Fibers in Supercritical C02

Adhesion anisotropy between contacting electrospun fibers.

The mechanical properties of electrospun fiber networks are critical in a range of applications from filtration to tissue engineering and are dependent on the adhesion between contacting fibers within the network. This adhesion is complex as electrospun networks exhibit a variety of contacts, including both cross-cylinder and parallel fiber configurations. In situ atomic force microscopy (AFM) ...

Adhesion Dynamics in Probing Micro- and Nanoscale Thin Solid Films

This study focuses on modeling the probe dynamics in scratching and indenting thin solid films at microand nanoscales. The model identifies bifurcation conditions that define the stick-slip oscillation patterns of the tip. It is found that the local energy fluctuations as a function of the inelastic deformation, defect formation, material properties, and contact parameters determine the oscilla...

Metallic Nanoscale Fibers from Stable Iodine-Doped Carbon Nanotubes