Micro-jet nozzle array for precise droplet metering and steering having increased droplet deflection

Anagnostopoulos, C.; Chwalek, James M.; Delametter, Christopher N.; Hawkins, G. A.; Jeanmaire, David L.; Lebens, John A.; Lopez, A.R.; Trauernicht, David P.

doi:10.1109/sensor.2003.1215330

Cited by 5 publications

(4 citation statements)

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“…Drop-on-demand uses pulses, generated either thermally or piezoelectrically, to eject solution droplets from a reservoir through a nozzle. Figure a shows a thermal inkjet printhead . In this device, electrical pulses applied to heaters that reside near the nozzles generate joule heating to vaporize the ink locally (heating temperature ∼ 300 °C for aqueous inks).…”

Section: 42 Inkjet Printingmentioning

confidence: 99%

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Micro- and Nanopatterning Techniques for Organic Electronic and Optoelectronic Systems

et al. 2007

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Daniel Shir graduated with distinction and obtained a B.S. degree in materials science and engineering from the Pennsylvania State University in 2005. He is currently pursuing a Ph.D. degree in materials science and engineering at the University of Illinois at Urbana−Champaign under Professor John A. Rogers's guidance. Yun-Suk Nam obtained a Ph.D. degree in chemical engineering from Sogang University, Seoul, South Korea, in 2004. He is currently a postdoctoral researcher in the Department of Materials Science and Engineering at the University of Illinois at Urbana−Champaign. Seokwoo Jeon was born in Seoul, Korea, in 1975. He received his B.S. degree in 2000 and his master's degree with Professor Shinhoo Kang from Seoul National University in 2003 after one year as an exchange graduate student with Professor Paul V. Braun at the University of Illinois at Urbana−Champaign (UIUC). He is currently pursuing his Ph.D. degree in materials science and engineering at UIUC under the direction of Professor John A. Rogers. His research interests include soft lithography, 3D nanopatterning, microfluidic systems, and optically functional materials and devices. John A. Rogers obtained B.A. and B.S. degrees in chemistry and in physics from the University of Texas, Austin, in 1989. From MIT, he received S.M. degrees in physics and in chemistry in 1992 and the Ph.D. degree in physical chemistry in 1995.

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Section: 42 Inkjet Printingmentioning

confidence: 99%

Section: 42 Inkjet Printingmentioning

confidence: 99%

Micro- and Nanopatterning Techniques for Organic Electronic and Optoelectronic Systems

et al. 2007

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“…Uses of dry etching processes [1,8,9] have also been reported. In many cases [8][9][10] the integration of other devices such as heaters and piezoelectric elements along with the nozzle are reported. In all these cases, the external geometry of the nozzle array is essentially planar, i.e., the nozzle orifice is surrounded by a planar surface.…”

Section: Introductionmentioning

confidence: 99%

Exploiting differential etch rates to fabricate large-scale nozzle arrays with protudent geometry

Mukhopadhyay¹,

Ferreira²

2007

J. Micromech. Microeng.

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Nozzles with micro and nanometer scale orifices are playing an increasingly important role in many micro and nano devices, processes and characterization applications such as cell sorters, micro deposition of structures and near-field optical scanning. This paper describes a new process that can generate nozzles in a silicon substrate with nozzle walls of silicon nitride and oxide and with protudent geometry around the nozzle orifice. The fabrication process exploits a combination of geometry and differences in etching rates to simultaneously open up the nozzle orifice and pattern the geometry around it. The result is an in-parallel, high-throughput process.

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“…There is increasing engineering and industrial interest in micro-fluidics, for example with the development of lab-on-chip devices, MEMS, electrospraying, micro-ink-jet printing, and the manufacture of pharmaceuticals, fine chemicals, small particles and powders. See Ahn et al (2005), Anagnostopoulos et al (2003), Anna et al (2005), Basaran (2002), Brenner et al (2005), Chatterjee et al (2005), Chwalek et al (2002), Daneshbod et al (2005), Delametter et al (2002), Dupont et al (2005), Furlani et al (2001), Furlani (2005a, Jang et al (2005), Kerbage et al (2005), Krupenkin et al (2005), Loscertales et al (2002), Morini et al (2005), Moseler and Landman (2000), Mukherjee et al (2005), Quake (2005), Sirringhaus et al (2000), Tabeling et al (2005), Wang et al (2005), Wu et al (2005), Xuan et al (2005), Ye et al (2005) and Zheng et al (2005) for some varied examples of some of the most recent work in microfluidics in other problems.…”

Section: Introductionmentioning

confidence: 99%

The spreading of a viscous microdrop on a solid surface

Decent

2006

Microfluid Nanofluid

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The spreading of a liquid microdrop across a solid surface is examined using the interface formation model. This model allows for variable surface tension at constant temperature and a flow induced Maragoni effect, by incorporating irreversible thermodynamics into the continuum model. The model is solved for small Capillary number and small Reynolds number. This problem has been considered before for much larger drops in Shikhmurzaev (Phys Fluids 9:266, 1997a), which examined the spreading of a drop for e = s U CL / R > 1, where U CL is the speed of the moving contact line across the solid surface, s is the surface tension relaxation time of the viscous liquid, and R is a typical length scale for the size of the drop. This paper extends that work by examining e = O(1), which will be shown to be the appropriate scaling for very small liquid drops, on the scale of micrometres or less.

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Micro-jet nozzle array for precise droplet metering and steering having increased droplet deflection

Cited by 5 publications

References 0 publications

Micro- and Nanopatterning Techniques for Organic Electronic and Optoelectronic Systems

Micro- and Nanopatterning Techniques for Organic Electronic and Optoelectronic Systems

Exploiting differential etch rates to fabricate large-scale nozzle arrays with protudent geometry

The spreading of a viscous microdrop on a solid surface

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