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Related Concept Videos

Assembly of Cytoskeletal Filaments01:18

Assembly of Cytoskeletal Filaments

Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...

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ECM Protein Nanofibers and Nanostructures Engineered Using Surface-initiated Assembly
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Solid state nanofibers based on self-assemblies: from cleaving from self-assemblies to multilevel hierarchical

Olli Ikkala1, Robin H A Ras, Nikolay Houbenov

  • 1Department of Applied Physics, Helsinki University of Technology, FIN-02015 TKK Espoo, Finland. Olli.lkkala@tkk.fi

Faraday Discussions
|March 26, 2010
PubMed
Summary
This summary is machine-generated.

This study explores creating solid nanofibers using self-assembly methods. Researchers developed "bottom-up" and "top-down" approaches for functional nanomaterials, including cellulose nanofibers and inorganic/organic hybrids.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Hierarchical self-assemblies are crucial for designing soft materials with tunable properties.
  • Controlling nanoscale structures is key to developing advanced functional materials.

Purpose of the Study:

  • To investigate "bottom-up" and "top-down" strategies for fabricating solid nanofibers.
  • To explore design principles for self-assembled constructs with controlled dimensions.
  • To create functional nanomaterials from polypeptide-nucleotide complexes and cellulose.

Main Methods:

  • Utilized triblock copolypeptide complexed with 2'-deoxyguanosine 5'-monophosphate for "bottom-up" assembly.
  • Investigated columnar assembly of G-quartets and helical poly(gamma-benzyl-L-glutamate) for packing frustration.
  • Employed "top-down" cleavage of native cellulose nanofibers from plant cell walls.
  • Prepared inorganic/organic hybrids using chemical vapor deposition and atomic layer deposition.

Main Results:

  • Achieved control over nanofiber lateral dimensions through competing interactions and packing frustrations.
  • Demonstrated the formation of supramolecular disks (G-quartets) and their assembly into nanofibers.
  • Successfully cleaved cellulose nanofibers (5-20 nm) to form hydrogels and aerogels.
  • Created inorganic/organic hybrid nanofibers and hollow nanofibrillar structures.

Conclusions:

  • Self-assembly offers versatile routes to engineer functional nanofibers.
  • Both "bottom-up" and "top-down" methods are effective for nanofiber fabrication.
  • Cellulose nanofibers serve as excellent templates for advanced nanomaterials.
  • Tunable functionalities can be achieved by selecting specific components and fabrication methods.