| 2026年5月15日 【24th nanobiofluids seminar】High resolution printing with electrified liquid jets |
| 日時： | 2026年5月15日（金）14：00～15：00 |
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| 場所： | 医生研１号館１階会議室（134室） Conference Room (Room 134), 1st Floor, Bldg. No.1 |
| 演者： | Prof. Supreet Singh Bahga Department of Mechanical Engineering, IIT Delhi |
| 演題： | High resolution printing with electrified liquid jets |
講演要旨
Liquid jets stretched under a strong electric field form the basis of electrohydrodynamic (EHD) jet printing process, wherein these fine jets are precisely deposited on a motion-controlled substrate. EHD jet printing offers high-resolution rapid prototyping of micrometre and sub-micrometer-sized two- and three-dimensional patterns. Consequently, this method paves the way for additive printing in various applications, including flexible electronics, biotechnology, and microfluidic networks. To achieve consistent and reliable printing results, a comprehensive nderstanding of the physics of liquid jets in the EHD jet printing configuration is essential. In this talk, I will first describe the physics of electrified jets in EHD jet printing configuration based on our experimental observations and mathematical modelling. In particular, I will describe the necessary process and geometric parameters required to obtain a stable jet from the tip of the conical Taylor cone. Next, based on the experimental visualisation of EHD jets and current measurements and scaling analysis, I will talk about various regimes of stable EHD jetting, namely the cone-jet, moderately stretched jet, and thick jet regimes. Lastly, I will present the development of our in-house EHD jet printer for printing miniaturised polymeric structures and its applications in fabricating complex microfluidic devices.
Host: Hirofumi Shintaku, shintaku[@]infront.kyoto-u.ac.jp