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Researchers created a novel bioinspired platform for artificial nanochannels using block copolymers. This scalable method yields ordered structures ideal for selective water transport and future functionalization.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials

Background:

  • Developing artificial nanochannels requires scalable platforms with controlled morphology and functionalization capabilities for selective transport.
  • Previous work involved asymmetric membranes with controlled pore size and surface charge.
  • A need exists for more complex, bioinspired platforms for advanced nanochannel applications.

Purpose of the Study:

  • To report a novel bioinspired platform for creating hierarchical porous structures with ordered nanochannels.
  • To demonstrate a scalable method for fabricating nanochannel platforms with tunable morphology.
  • To functionalize these nanochannels for selective water transport.

Main Methods:

  • Utilized phase separation of polystyrene-b-poly(t-butyl acrylate) block copolymers.
  • Employed a nucleation and growth mechanism for structure formation.
  • Characterized the hierarchical structure using scanning electron microscopy (SEM) and small-angle X-ray scattering (SAXS).
  • Investigated structure evolution with time-resolved grazing-incidence small-angle X-ray scattering (TR-GISAXS).
  • Converted the hydrophobic structure to a hydrophilic one via acid hydrolysis.

Main Results:

  • Successfully prepared hierarchical isotropic porous structures with micrometer-sized cavities interconnected by hexagonally ordered nanochannels.
  • SEM imaging confirmed a high density of ordered nanochannels.
  • SAXS confirmed the hexagonal order formed by self-assembly.
  • Acid hydrolysis resulted in nanochannels functionalized with carboxylic groups, enabling water transport.

Conclusions:

  • A scalable and robust method for fabricating bioinspired hierarchical nanochannels was developed.
  • The resulting nanochannels exhibit controlled morphology and ordered structure.
  • The functionalized nanochannels are suitable for selective water transport, paving the way for advanced membrane technologies.