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Related Experiment Video

Updated: Nov 26, 2025

High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
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Microtip focused electrohydrodynamic jet printing with nanoscale resolution.

Shijie Su1, Junsheng Liang, Zizhu Wang

  • 1Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian 116023, China. jsliang@dlut.edu.cn.

Nanoscale
|December 10, 2020
PubMed
Summary

Microtip focused electrohydrodynamic jet (MFEJ) printing overcomes limitations of traditional E-Jet methods. This new technique enables printing with high-viscosity inks and achieves unprecedented nanoscale resolution for fabricating nanodevices.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Manufacturing Engineering

Background:

  • Electrohydrodynamic jet (E-Jet) printing offers high resolution and efficiency for micro-/nano-fabrication.
  • Limitations include restricted ink viscosity (below 90 mPa s) and necking ratio due to nozzle clogging and focusing principles.

Purpose of the Study:

  • To introduce a novel microtip focused electrohydrodynamic jet (MFEJ) printing technique.
  • To overcome the limitations of conventional E-Jet printing, particularly regarding ink viscosity and resolution.

Main Methods:

  • Utilized a solid microtip with a radius of curvature (ROC) of several micrometers instead of a hollow nozzle.
  • Tested a wide range of ink viscosities from 8.4 to 3500 mPa s.
  • Fabricated high-resolution patterns in diverse geometries.

Main Results:

  • Achieved nanodroplets with an average diameter of 73 nm.
  • Produced nanofibers with a diameter of 30 nm using a 4 μm ROC microtip.
  • Attained a maximum necking ratio of 266:1, the smallest reported droplet/fiber diameter via E-Jet printing without post-processing.

Conclusions:

  • MFEJ printing effectively avoids nozzle clogging, even with high-viscosity inks.
  • The technique significantly enhances printing resolution at the nanoscale.
  • MFEJ printing broadens material applicability for nanodevice fabrication.