Accession Number : ADA576581


Title :   Hierarchically Structured Electrospun Fibers


Descriptive Note : Journal article


Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE


Personal Author(s) : Zander, Nicole E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a576581.pdf


Report Date : 07 Jan 2013


Pagination or Media Count : 28


Abstract : Traditional electrospun nanofibers have a myriad of applications ranging from scaffolds for tissue engineering to components of biosensors and energy harvesting devices. The generally smooth one-dimensional structure of the fibers has stood as a limitation to several interesting novel applications. Control of fiber diameter, porosity and collector geometry will be briefly discussed, as will more traditional methods for controlling fiber morphology and fiber mat architecture. The remainder of the review will focus on new techniques to prepare hierarchically structured fibers. Fibers with hierarchical primary structures?including helical, buckled, and beads-on-a-string fibers, as well as fibers with secondary structures, such as nanopores, nanopillars, nanorods, and internally structured fibers and their applications?will be discussed. These new materials with helical/buckled morphology are expected to possess unique optical and mechanical properties with possible applications for negative refractive index materials, highly stretchable/high-tensile-strength materials, and components in microelectromechanical devices. Core-shell type fibers enable a much wider variety of materials to be electrospun and are expected to be widely applied in the sensing, drug delivery/controlled release fields, and in the encapsulation of live cells for biological applications. Materials with a hierarchical secondary structure are expected to provide new superhydrophobic and self-cleaning materials.


Descriptors :   *FIBERS , *NANOSTRUCTURES , BIOLOGICAL DETECTION , BIOLOGY , ENERGY , GENETIC ENGINEERING , MECHANICAL PROPERTIES , MORPHOLOGY , OPTICAL PROPERTIES , POLYMERS , POROSITY , REPRINTS , TISSUES(BIOLOGY)


Subject Categories : Polymer Chemistry
      Electrical and Electronic Equipment
      Ceramics, Refractories and Glass


Distribution Statement : APPROVED FOR PUBLIC RELEASE