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    Double Transfer Printing of Small Volumes of Liquids

    Year: 2007

    Journal: Langmuir, 2007, 23 (5), pp 2906–2914, 20111221

    Authors: Chaitanya Gupta, Glennys A. Mensing, Mark A. Shannon, and Paul J. A. Kenis

    Organizations: Department of Chemical & Biomolecular Engineering, Department of Mechanical Science & Engineering, and Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

    We report here a technique to print small volumes of liquid on a hydrophobic substrate. This process is based on the control of the critical parameters that govern a quasi-equilibrium liquid transfer process from one surface to another. We present a qualitative model that describes the physics of a transfer printing process between hydrophobic surfaces, and we use the parameters outlined in this model to manipulate the amount of liquid transferred between surfaces. We demonstrate the printing of discrete, small volumes (70 fL) of different liquid inks on a polymer substrate starting with volumes that are 8 orders of magnitude larger (a droplet of 10 μL) in a simple two-step procedure.