The Effect of External Voltage on Pulsed Electrohydrodynamic Printing

Abstract:

Picoliter or femtoliter droplets generated with high frequency is very useful for many applications in different valuable fields, such as microarray generation, drug delivery or biochips. Pulsed electrohydrodynamic inkjet printing (Pulsed EHDP) is an advanced technology which is used for generating fine droplets in recent years. Apparently, the deposition frequency of droplets is a key parameter, and it is influenced by various factors. In this paper, the effect of duty cycle and voltage frequency on deposition frequency is investigated in the pulsation mode. A simple scaling law is proposed to demonstrate relationships between these two parameters and deposition frequency. Results show that volume of the liquid accumulated at the apex of the nozzle changes during the non-electric field period, which affects taylor cone deformation time and deposition frequency. High deposition frequency can be achieved by increasing the duty cycle up to 0.7, and choosing voltage frequency between 10Hz to 40Hz. These analysis is valuable for understanding Pulsed EHDP deeply and fabricating the micro/nanoapplications.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 1339-1344
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.1339
• Online since: July 2015
• Authors: Xin Yuan*, Zheng Yu Ba, Zhen Hua Xiong
• Keywords: Deposition Frequency, EHDP, External Voltage, Pulsation Mode

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