Morphology and deposit of picoliter droplet tracks generated by inkjet printing

In this work, the morphological patterns of liquid tracks of droplets (~10 pl) wetting on a homogeneous surface were investigated analytically and experimentally. Using drop- on-demand inkjet printing, micro liquid tracks were formed from silver (Ag) nanoparticle suspension (~40 nm) ink under ambient environments. These liquid tracks in circular and polygonal shapes were intended to have different line widths (W) from 25 µm to 250 µm and droplet spacing (s) from 10 to 20 µm. The re-scaled ratio of volume (VR = V/W 3 ) and aspect ratio of length (AR = L i/L o) were calculated to construct one morphological diagram. The resulting morphological diagram generated from the inkjet printing formations clearly showed three distinct morphologies: the cap (C), bulge (B), and ring (R) phases. In other words, the morphological phase of the inkjet printing formations could be changed simply by varying the values of W and s. Also the looped liquid tracks clearly indicated that capillary (convective) flows were induced due to interfacial energy during the formation of nano-Ag deposits. Finally, we demonstrated the anchoring effect on suppression of bulges by the addition of one anchor in front of all segments. The findings in liquid track morphology here may be further developed for a variety of inkjet printing applications such as electric conductors and electrodes in micro-electro-mechanical systems (MEMS) in the future.

[1]  T. Young.  III. An essay on the cohesion of fluids , 1805, Philosophical Transactions of the Royal Society of London.

[2]  S. H. Davis.  Moving contact lines and rivulet instabilities. Part 1. The static rivulet , 1980, Journal of Fluid Mechanics.

[3]  Ain A. Sonin,et al.  Formation and stability of liquid and molten beads on a solid surface , 1997, Journal of Fluid Mechanics.

[4]  Lenz,et al.  Liquid morphologies on structured surfaces: from microchannels to microchips , 1999, Science.

[5]  H. Sirringhaus,et al.  High-Resolution Ink-Jet Printing of All-Polymer Transistor Circuits , 2000, Science.

[6]  Javad Mostaghimi,et al.  A three-dimensional model of droplet impact and solidification , 2002 .

[7]  Marco Marengo,et al.  Time evolution of liquid drop impact onto solid, dry surfaces , 2002 .

[8]  P. Duineveld,et al.  The stability of ink-jet printed lines of liquid with zero receding contact angle on a homogeneous substrate , 2003, Journal of Fluid Mechanics.

[9]  Wolfgang Clemens,et al.  Fully printed integrated circuits from solution processable polymers , 2004 .

[10]  Vivek V. Ranade,et al.  Dynamics of drop impact on solid surface: Experiments and VOF simulations , 2005 .

[11]  Hong Sun Ryou,et al.  Droplet collision processes in an inter-spray impingement system , 2005 .

[12]  A. Yarin.  Drop Impact Dynamics: Splashing, Spreading, Receding, Bouncing ... , 2006 .

[13]  Ulrich S. Schubert,et al.  Geometric control of inkjet printed features using a gelating polymer , 2007 .

[14]  F. Tseng,et al.  Uniform Solute Deposition of Evaporable Droplet in Nanoliter Wells , 2007, Journal of Microelectromechanical Systems.

[15]  Edward Bormashenko,et al.  The rigorous derivation of Young, Cassie–Baxter and Wenzel equations and the analysis of the contact angle hysteresis phenomenon , 2008 .

[16]  I. Hutchings,et al.  Inkjet printing - the physics of manipulating liquid jets and drops , 2008 .

[17]  U. Schubert,et al.  Inkjet Printing of Narrow Conductive Tracks on Untreated Polymeric Substrates , 2008 .

[18]  U. Schubert,et al.  Inkjet-printed silver tracks : low temperature curing and thermal stability investigation , 2008 .

[19]  V. Subramanian,et al.  Inkjet-printed line morphologies and temperature control of the coffee ring effect. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[20]  Roland Zengerle,et al.  Computational fluid dynamics (CFD) software tools for microfluidic applications – A case study , 2008 .

[21]  K. Sakai,et al.  Hyper Rheology Measurement by Emission and Collision of Micro-Fluid Particles , 2008 .

[22]  S. Franssila,et al.  Complex Droplets on Chemically Modified Silicon Nanograss , 2008 .

[23]  Jun Long Lim,et al.  Self‐Organization of Ink‐jet‐Printed Triisopropylsilylethynyl Pentacene via Evaporation‐Induced Flows in a Drying Droplet , 2008 .

[24]  Jan G. Korvink,et al.  Inkjet printed, conductive, 25 μm wide silver tracks on unstructured polyimide , 2009 .

[25]  Chang-Hun Kim,et al.  Phase-field model for the pinchoff of liquid-liquid jets , 2009 .

[26]  Chung-Hao Tien,et al.  Microlens Arrays by Direct-Writing Inkjet Print for LCD Backlighting Applications , 2009, Journal of Display Technology.

[27]  Jonathan Stringer,et al.  Formation and stability of lines produced by inkjet printing. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[28]  Andrew G. Alleyne,et al.  A desktop electrohydrodynamic jet printing system , 2010 .

[29]  Clemens Bechinger,et al.  Morphological wetting transitions at ring-shaped surface domains. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[30]  Je Hoon Oh,et al.  Geometrical characterization of inkjet-printed conductive lines of nanosilver suspensions on a polymer substrate , 2010 .

[31]  Glen McHale,et al.  An introduction to superhydrophobicity. , 2010, Advances in colloid and interface science.

[32]  Abhijit S Joshi,et al.  Numerical Simulation of Colloidal Drop Deposition Dynamics on Patterned Substrates for Printable Electronics Fabrication , 2010, Journal of Display Technology.

[33]  B. Derby.  Inkjet Printing of Functional and Structural Materials: Fluid Property Requirements, Feature Stability, and Resolution , 2010 .

[34]  Wi Hyoung Lee,et al.  Inkjet‐Printed Single‐Droplet Organic Transistors Based on Semiconductor Nanowires Embedded in Insulating Polymers , 2010 .

[35]  Henrik Andersson,et al.  System of nano-silver inkjet printed memory cards and PC card reader and programmer , 2011, Microelectron. J..

[36]  S. Calvez,et al.  Large cross-section edge-coupled diamond waveguides , 2011 .

[37]  Vivek Subramanian,et al.  All inkjet-printed, fully self-aligned transistors for low-cost circuit applications , 2011 .

[38]  Chin-Tai Chen,et al.  Inkjet Printing of Microcomponents: Theory, Design, Characteristics and Applications , 2011 .

[39]  Peter J. Yunker,et al.  Suppression of the coffee-ring effect by shape-dependent capillary interactions , 2011, Nature.

[40]  Brian Derby,et al.  Printing and Prototyping of Tissues and Scaffolds , 2012, Science.

[41]  Chin-Tai Chen,et al.  Morphologies of conductive looped liquid lines inkjet-printed on substrate surfaces , 2012 .

[42]  Enrico Sowade,et al.  In‐Flight Inkjet Self‐Assembly of Spherical Nanoparticle Aggregates , 2012 .

[43]  Chin-Tai Chen,et al.  Microdroplets of red photoresist inkjet printed onto commercial black matrix glasses , 2012 .

[44]  Weng-Sing Hwang,et al.  Low temperature fabricated conductive lines on flexible substrate by inkjet printing , 2012, Microelectron. Reliab..

[45]  James J. Yoo,et al.  Complex heterogeneous tissue constructs containing multiple cell types prepared by inkjet printing technology. , 2013, Biomaterials.

[46]  Ronn Andriessen,et al.  Inkjet Printing of Back Electrodes for Inverted Polymer Solar Cells , 2013 .

[47]  Ian M. Hutchings,et al.  Future, Opportunities and Challenges of Inkjet Technologies , 2013 .

[48]  Shaorong Xie,et al.  A review of non-contact micro- and nano-printing technologies , 2014 .

[49]  Wen-Kai Hsiao,et al.  Printing stable liquid tracks on a surface with finite receding contact angle. , 2014, Langmuir : the ACS journal of surfaces and colloids.

[50]  K. Karan,et al.  Analysis of Low Platinum Loading Thin Polymer Electrolyte Fuel Cell Electrodes Prepared by Inkjet Printing , 2015 .