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Electrohydrodynamic direct-writing

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2015020361527221.pdf

The electrohydrodynamic (EHD) direct-writing technique can be used to print solid/liquid straight/
serpentine nanofibers onto a large-area substrate, in a direct, continuous, and controllable manner. It is
a high-efficiency and cost-effective solution-processable technique to satisfy increasing demands of
large-area micro/nano-manufacturing. It is ground-breaking to direct-write sub-100 nm fibers on a
rigid/flexible substrate using organic materials. A comprehensive review is presented on the research
and developments related to the EHD direct-writing technique and print heads. Many developments
have been presented to improve the controllability of the electrospun fibers to form high-resolution
patterns and devices. EHD direct-writing is characterized by its non-contact, additive and reproducible
processing, high resolution, and compatibility with organic materials. It combines dip-pen, inkjet, and
electrospinning by providing the feasibility of controllable electrospinning for sub-100 nm
nanofabrication, and overcomes the drawbacks of conventional electron-beam lithography, which is
relatively slow, complicated and expensive.

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