On-demand electrohydrodynamic jetting with meniscus control by a piezoelectric actuator for ultra-fine patterns

Young Jae Kim, Sang Yoon Kim, Jun Sung Lee, Jungho Hwang, Yong-Jun Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The on-demand ejection of ultra-fine droplets that uses both an electrohydrodynamic (EHD) force and mechanical actuation is presented. The liquid meniscus was controlled by a piezoelectric actuator, and the droplets were ejected by the EHD force. Through these effects, it was possible to obtain a high operational jetting frequency of 1 kHz with a short delay time (about 50 νs) in comparison with existing on-demand, EHD jetting methods, such as the pulsating jet mode (3-10 ms) and the pulsed cone-jet mode (3.6 ms). Simultaneously, we obtained ultra-fine droplets through adjustments of the piezoelectric driving waveform. The jetting characteristics were examined for both the hydrophobicity and the hydrophilicity of the surface of a capillary.

Original languageEnglish
Article number107001
JournalJournal of Micromechanics and Microengineering
Volume19
Issue number10
DOIs
Publication statusPublished - 2009 Nov 9

Fingerprint

Electrohydrodynamics
Piezoelectric actuators
Hydrophilicity
Hydrophobicity
Cones
Time delay
Liquids

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

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abstract = "The on-demand ejection of ultra-fine droplets that uses both an electrohydrodynamic (EHD) force and mechanical actuation is presented. The liquid meniscus was controlled by a piezoelectric actuator, and the droplets were ejected by the EHD force. Through these effects, it was possible to obtain a high operational jetting frequency of 1 kHz with a short delay time (about 50 νs) in comparison with existing on-demand, EHD jetting methods, such as the pulsating jet mode (3-10 ms) and the pulsed cone-jet mode (3.6 ms). Simultaneously, we obtained ultra-fine droplets through adjustments of the piezoelectric driving waveform. The jetting characteristics were examined for both the hydrophobicity and the hydrophilicity of the surface of a capillary.",
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On-demand electrohydrodynamic jetting with meniscus control by a piezoelectric actuator for ultra-fine patterns. / Kim, Young Jae; Kim, Sang Yoon; Lee, Jun Sung; Hwang, Jungho; Kim, Yong-Jun.

In: Journal of Micromechanics and Microengineering, Vol. 19, No. 10, 107001, 09.11.2009.

Research output: Contribution to journalArticle

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