Design and evaluation of single nozzle with a non-conductive tip for reducing applied voltage and pattern width in electrohydrodynamic jet printing (EHDP)

作者：Kim Sang Yoon; Kim Yong; Park Jaehong; Hwang Jungho^*

来源：Journal of Micromechanics and Microengineering, 2010, 20(5): 055009.

DOI：10.1088/0960-1317/20/5/055009

We investigated the effect of a non-conductive tip inserted into a capillary nozzle (inner diameter of 860 mu m) on jet formation and pattern width in electrohydrodynamic jet printing. Simulated and experimental results showed that the non-conductive tip stabilized the jet, and reduced the effective nozzle diameter and the onset voltage needed for the cone-jet mode, by eliminating the backflow near the apex of the liquid cone while a tiny backflow away from the apex of the liquid cone still remained. Silver nanocolloid patterns with an average width of 18.5 mu m (standard deviation: 1.5 mu m) were obtained with an applied voltage of 2.7 kV, a flow rate of 3 mu l min(-1) and a stage velocity of 200 mm s(-1).

• 出版日期2010-5