期刊
MATERIALS & DESIGN
卷 166, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2019.107609
关键词
Electrohydrodynamic (EHD) printing; Tip-assisted EHD; Micropatterning; High-resolution printing
资金
- National Natural Science Foundation of China [61475183, 61503258, U1613220]
- NSFC/RGC Joint Research Scheme [51461165501]
- CAS FEA International Partnership Program for Creative Research Teams
- Open Project Program of Beijing Advanced Innovation Center for Intelligent Robots, Beijing Institute of Technology [2016IRS08]
- Youth Innovation Promotion Association CAS [2015160]
The controlled patterning of microdroplets or microwires at precise positions plays an essential role in micro/nano device applications. In this context, we propose a novel and efficient method called tip-assisted electrohydrodynamic (EHD) printing that combines the tip-assisted electric field intensity enhancement effect and the high-resolution capability of EHD printing. The tip-assisted electric field enhancement effect is first systematically investigated by simulation analysis. Under optimized experimental conditions, we obtain microdroplet arrays and microwires down to sizes of 2.3 mu m and controlled micropatterns composed of droplet arrays or microwires with sizes smaller than the inner diameter of nozzle by means of the tip-assisted technique. We find that with our designed tip-assisted nozzle, solutions with a high viscosity of >2000 cps can be extracted from the nozzle, and the printing resolution can increase by nearly five times the current resolution. Our results demonstrate that tip-assisted EHD printing provides a potential and flexible method for precision and controlled manufacturing of micropatterns. (C) 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
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