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DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
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Molecular discrimination inside polymer nanotubules.

Elamprakash N Savariar1, K Krishnamoorthy, S Thayumanavan

  • 1Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA.

Nature Nanotechnology
|July 26, 2008
PubMed
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Functionalizing nanoporous membranes with polymers enables selective separation of small molecules and proteins. This advancement offers enhanced control over molecular recognition in confined spaces for pharmaceutical and biological applications.

Area of Science:

  • Materials Science
  • Biotechnology
  • Chemical Engineering

Background:

  • Molecular recognition is crucial in pharmaceutical and biological applications.
  • Nanoporous membranes offer advantages for ligand-receptor interactions in confined spaces.
  • Current nanoporous membrane separations primarily rely on analyte size, limiting selectivity.

Purpose of the Study:

  • To develop a simple method for functionalizing nanoporous membranes.
  • To enhance selectivity of nanoporous membranes beyond simple size exclusion.
  • To demonstrate the separation capabilities of functionalized membranes for small molecules and proteins.

Main Methods:

  • Functionalization of nanoporous membranes using self-assembling and non-self-assembling polymers.
  • Characterization of membrane properties and separation performance.

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  • Differential transport studies for small molecules and proteins.

    • Main Results:

    • Modified membranes successfully separate small molecules based on size, charge, and hydrophobicity.
    • Proteins exhibit differential transport through the functionalized nanopores, influenced by size and electrostatics.
    • The polymer functionalization approach provides tunable selectivity.

    Conclusions:

    • Polymer-functionalized nanoporous membranes offer a versatile platform for selective molecular separation.
    • This method enhances molecular recognition capabilities within confined membrane environments.
    • The approach has significant implications for advanced separation technologies in pharmaceutical and biological fields.