Nano Archive

Pole-type ground electrode in nozzle for electrostatic field induced drop-on-demand inkjet head

Lee, Sukhan and Byun, Doyoung and Jung, Daewon and Choi, Jaeyong and Kim, Yongjae and Yang, Ji Hye and Son, Sang Uk and Tran, Si Bui Quang and Ko, Han Seo (2008) Pole-type ground electrode in nozzle for electrostatic field induced drop-on-demand inkjet head. Sensors and Actuators A: Physical, 141 (2). 506 - 514.

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Official URL: http://www.sciencedirect.com/science/article/B6THG...

Abstract

This paper presents a novel mechanism for an electrostatic field induced drop-on-demand ink-jetting device that features a nozzle with a conductive pole located inside the nozzle, referred to here as a pole-type nozzle. The effects of the pole-type nozzle on the efficiency of the jetting are numerically and experimentally investigated. The electric voltage signal applied allows for a strong electric field to be concentrated in the vicinity of the apex of the liquid meniscus and thus micro-dripping ejection of droplet takes place. That is, a tiny droplet is removed from the peak of the dome-shaped liquid meniscus. Electrostatic jetting of liquids is a physical process caused by an electric force applied to the surface of a liquid. The electrical shear stress elongates the liquid meniscus formed at the opening of the nozzle and generates a tiny droplet as a result of the balance between electrical and surface tension forces. This paper presents optimal conditions for applied voltage, electric conductivity, and flow rate for generating a stable drop-on-demand droplet using the micro-dripping mode. It is also verified experimentally that the use of the pole-type nozzle allows a stable and sustainable micro-dripping mode of droplet ejection for a wide range of applied voltages, demonstrating the feasibility of an electrostatic field induced drop-on-demand ink-jetting device as an alternative to conventional inkjet print heads.

Item Type:Article
Uncontrolled Keywords:Electrostatic field induced inkjet; Drop-on-demand; Droplet ejection; Pole-type ground electrode; Ink physical property
Subjects:Analytical Science > Nanotechnology for sensing and actuating
ID Code:4888
Deposited By:SPI
Deposited On:10 Apr 2009 06:43
Last Modified:10 Apr 2009 06:43

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