Nanotechnology Conference and Trade Show - Nanotech 2006
> Program > Technical Conferences > Business & Development > Nano Impact Workshop > Nanotech Job Fair > Expo
Index of Authors
Index of Keywords
Confirmed Speakers
Conferences & Symposia

Conference Proceedings

Conference Technical Proceedings

Thermally Induced Marangoni Instability of Liquid Microjets with Application to Continuous Inkjet Printing

E.P. Furlani, B.G. Price, G. Hawkins and A.G. Lopez
Eastman Kodak Co., US

Marangoni instability, inkjet, microfluidic injet, continuous inkjet, MEMS inkjet

Liquid microjets are inherently unstable and can be broken into droplets in a controllable fashion via thermal modulation of surface tension. Such modulation can be achieved using CMOS/MEMS technology by integrating resistive heating elements around each orifice of a microfluidic printhead. When the heating elements are modulated in a time-wise fashion, the thermal energy they produce diffuses into the microjet, and is carried downstream by the jet velocity. The time-wise thermal modulation results in a spatial variation of surface tension along the length of the jet, which induces Marangoni instability that ultimately causes breakup and drop formation. Based on this effect, novel microfluidic printheads have been fabricated with hundreds of orifices that can be individually modulated to produce steady streams of picoliter-sized droplets. These devices operate at kilohertz frequencies, and are capable of unprecedented speed of droplet generation. In this paper, we discuss thermally induced Marangoni instability and its application to continuous inkjet printing. We present a fabricated CMOS/MEMS printhead, and experimental data of its performance relative to jet instability and drop formation. We show sample prints obtained from the printhead, and compare the experimental data with analytical and CFD simulations

Back to Program

Sessions Sunday Monday Tuesday Wednesday Thursday Authors

Nanotech 2006 Conference Program Abstract

Nanotechnology Conference | Terms of use | Privacy policy | Contact | NSTI Home
Program | Technical Conferences | Business & Development | Nano Impact Workshop | Nanotech Job Fair | Expo |
Nanotech 2006 Home | Press Room | Venue | Subscribe | Site Map
Names, and logos of other organizations are the property of those organizations and not of NSTI.
This event is not open to the general public and NSTI reserves the right to refuse admission and participation to any individual.