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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
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Biomimetic Nanometer-Size All-Liquid Channels.

Quanyong Cheng1, Yuhang Song1, Liyan Dai2

  • 1School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry For Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei, China.

Advanced Materials (Deerfield Beach, Fla.)
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Summary
This summary is machine-generated.

Researchers developed a novel quasistatic stretching method using nanoparticle-polymer coassemblies to create stable, ultrafine liquid channels. This breakthrough significantly reduces channel size, enabling biomimetic functions like intercellular rescue and immunotherapy.

Keywords:
interfacial jammingliquid bridgesliquid tubular biomimicrynanoparticle–polymer interfacial coassemblingquasistatic stretching

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Area of Science:

  • Soft Matter Physics
  • Nanotechnology
  • Biophysics

Background:

  • Micro/nanoscale fluidic channels are vital for cellular mass transfer.
  • Artificial construction of stable, ultrafine liquid channels faces challenges like Plateau-Rayleigh instability.

Purpose of the Study:

  • To develop a new method for creating stable, ultrafine all-liquid channels.
  • To demonstrate biomimetic functions using these artificial channels.

Main Methods:

  • A "quasistatic stretching" approach applied to liquid bridges in immiscible liquids.
  • Manipulation of liquid/liquid interfaces using interfacial nanoparticle-polymer coassemblies.
  • Establishing component selection rules for ultrafine channel formation.

Main Results:

  • Achieved stepwise reduction of liquid bridge size down to the hundred-nanometer scale.
  • Demonstrated plastic deformability of the liquid bridge due to polymer chain properties.
  • Successfully simulated intercellular mitochondrial rescue and compartmentalized immunotherapy.

Conclusions:

  • The quasistatic stretching method overcomes Plateau-Rayleigh instability for ultrafine channel creation.
  • The developed channels approach the size of natural biomimetic counterparts.
  • This framework offers insights into biophysical processes mediated by tubular structures.