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Note: Electric field assisted megasonic atomization for size-controlled nanoparticles.

Hyeong-U Kim1, Atul Kulkarni2, Soohyun Ha1

  • 1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, South Korea.

The Review of Scientific Instruments
|August 3, 2017
PubMed
Summary
This summary is machine-generated.

Electric field assisted megasonic atomization (EMA) successfully reduced aerosol particle size to the nanoscale. This method significantly increased nanoparticle concentration, offering potential for industrial applications requiring uniform nanoparticles.

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Area of Science:

  • Nanotechnology
  • Aerosol Science
  • Materials Science

Background:

  • Megasonic atomization is a method for generating aerosols.
  • Controlling particle size and concentration is crucial for many applications.
  • Existing methods may not efficiently produce nanoscale particles.

Purpose of the Study:

  • To develop an electric field assisted megasonic atomization (EMA) system.
  • To reduce aerosol particle size to the nanoscale regime.
  • To increase the number concentration of generated nanoparticles.

Main Methods:

  • Implemented a mesh and induction charging ring with a megasonic atomizer.
  • Applied electric supply voltage up to +20 kV.
  • Generated and analyzed NaCl and TiO2 aerosols using an electrical low-pressure impactor and scanning electron microscopy.

Main Results:

  • At +15 kV, nanoparticle concentration increased up to five times.
  • Peak particle size shifted from 40 nm to 15 nm.
  • Observed particle size reduction and increased concentration, potentially due to Coulomb fission.

Conclusions:

  • The developed EMA system effectively produces nanoscale particles.
  • EMA significantly enhances nanoparticle number concentration.
  • This technology is suitable for industrial applications requiring uniform nanoparticles.