Abstract
In the process of fabricating micro-patterns using the near-field electrohydrodynamic (EHD) direct-writing technology, the voltage error and the dynamic responsiveness of applied voltage have an effect on the jetting shape and the direct-writing pattern. To solve these problems, an iterative control method was proposed to compensate the voltage error between the expected voltage and the actual voltage of the near-field EHD direct-writing setup, which was controlled by the idea of iteration, and a control method based on feedforward and feedback was proposed to enhance the dynamic response of applied voltage in the process of the near-field EHD direct-writing micro-pattern, which was controlled by the idea of the feedforward and feedback. Software algorithms of the voltage error compensation and improved dynamic response of applied voltage were implemented in the near-field EHD direct-writing setup. The experimental results show that the proposed method of voltage error compensation can effectively improve the precision of applied voltage and the presented control method of improving dynamic response capability can effectively shorten the delay time of applied voltage. Finally, two groups of contrast experiments were carried out in the near-field EHD direct-writing equipment, and the experimental results demonstrate that the proposed control methods can effectively improve the jetting shape and the quality of the direct-writing micro-pattern.
Highlights
In the near-field electrohydrodynamic (EHD) direct-writing technology, electrostatic force is used to cause a jet from a micronozzle to generate micro-/nano-scale patterns by applying high voltage between the nozzle and the substrate.1 Compared with electrospinning, this technology is helpful for improving the positioning accuracy of micro-patterns
The technology can use a variety of direct-writing solutions to fabricate micro-/nano-patterns of different functional devices, which makes the technology have a broad prospect of industrial applications, such as wearable sensors,4 flexible electronics,5 micro-electro-mechanical systems (MEMS),6 biosensors,7 gas sensors,8 transistors,9 nanogenerators,10 tissue engineering,11 optical devices
The commanding voltage was input through the data input module of the software control system, and the corresponding actual voltages were collected through the serial port of the industrial personal computer
Summary
In the near-field electrohydrodynamic (EHD) direct-writing technology, electrostatic force is used to cause a jet from a micronozzle to generate micro-/nano-scale patterns by applying high voltage between the nozzle and the substrate. Compared with electrospinning, this technology is helpful for improving the positioning accuracy of micro-patterns. In the near-field electrohydrodynamic (EHD) direct-writing technology, electrostatic force is used to cause a jet from a micronozzle to generate micro-/nano-scale patterns by applying high voltage between the nozzle and the substrate.. In the near-field electrohydrodynamic (EHD) direct-writing technology, electrostatic force is used to cause a jet from a micronozzle to generate micro-/nano-scale patterns by applying high voltage between the nozzle and the substrate.1 Compared with electrospinning, this technology is helpful for improving the positioning accuracy of micro-patterns. The technology can use a variety of direct-writing solutions to fabricate micro-/nano-patterns of different functional devices, which makes the technology have a broad prospect of industrial applications, such as wearable sensors, flexible electronics, micro-electro-mechanical systems (MEMS), biosensors, gas sensors, transistors, nanogenerators, tissue engineering, optical devices.. Kang et al. used the EHD printing technique to print micro-patterns of the gas sensor. The proposed method can be used to manufacture various types of optical microlenses, such as those with multiple materials, different geometric shapes, and different thicknesses of the substrate
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call