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Issue 13, 2012
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Surface plasmon nanolithography: impact of dynamically varying near-field boundary conditions at the air–polymer interface

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Abstract

It is well-known that surface plasmon generated near fields of suitably irradiated metal nano-structures can induce a patterning in an azobenzene-modified photosensitive polymer film placed on top. The change in the topography usually follows closely and permanently the underlying near field intensity pattern. With this approach, one can achieve a multitude of morphologies by additionally changing light intensity, polarization and the kind of metal used for nano-structuring. In this paper, we demonstrate that below a critical value of the polymer film thickness, the receding polymer material induces a change in refractive index of the glass–metal–polymer system, modifying the near field intensity distribution and causing a back-reaction on the flow of polymer material. This has a profound influence on the smallest size of topographical features that can be imprinted into the polymer.

Graphical abstract: Surface plasmon nanolithography: impact of dynamically varying near-field boundary conditions at the air–polymer interface

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Publication details

The article was received on 14 Nov 2011, accepted on 17 Jan 2012 and first published on 17 Feb 2012


Article type: Paper
DOI: 10.1039/C2JM15864G
Citation: J. Mater. Chem., 2012,22, 5945-5950
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    Surface plasmon nanolithography: impact of dynamically varying near-field boundary conditions at the air–polymer interface

    T. König, Y. Nataraja Sekhar and S. Santer, J. Mater. Chem., 2012, 22, 5945
    DOI: 10.1039/C2JM15864G

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