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Issue 2, 2013
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Vacuum-assisted microcontact printing (μCP) for aligned patterning of nano and biochemical materials

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Abstract

We developed a novel vacuum-assisted microcontact printing (μCP) process that presents a powerful method for patterning functional materials with precise alignment. The printing pressure of the vacuum-assisted μCP was applied using the pressure difference between the inside and outside of an elastomeric stamp. A double exposure microfabrication process was adopted for manufacturing different height protrusions on the elastomeric stamps. The outer protrusion was designed to be higher than the printing patterns, thereby acting as a vacuum sealing wall. The printing pressure was easily applied and controlled using commercial syringes and motorized syringe controllers. A high printing pressure exceeding 10 psi was applied uniformly to the target substrate. Precision alignment was realized using a common optical alignment system. During the alignment process, damage to the previously patterned material and undesired printing patterns due to stamp dragging were avoided by imposing a separation distance between the printed pattern and the substrate. Several functional materials, including proteins and nanomaterials, could be successively patterned. Proteinprotein, proteinnanowire, and three-dimensionally patterned nanowires are described. This versatile vacuum-assisted μCP process is a powerful means for implementing the large-scale fabrication in bio- and nano-technologies and related applications.

Graphical abstract: Vacuum-assisted microcontact printing (μCP) for aligned patterning of nano and biochemical materials

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Publication details

The article was received on 27 Sep 2012, accepted on 11 Oct 2012 and first published on 12 Oct 2012


Article type: Paper
DOI: 10.1039/C2TC00288D
Citation: J. Mater. Chem. C, 2013,1, 268-274
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    Vacuum-assisted microcontact printing (μCP) for aligned patterning of nano and biochemical materials

    H. W. Kang, J. Leem, S. H. Ko, S. Y. Yoon and H. J. Sung, J. Mater. Chem. C, 2013, 1, 268
    DOI: 10.1039/C2TC00288D

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