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Issue 3, 2011
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Guided assembly of metal and hybrid conductive probes using floating potential dielectrophoresis

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Abstract

We present the site-selective, parallel and reproducible formation of conductive gold and tetrathiafulvalene–gold (TTF–Au) hybrid micro- and nanowires from their respective ion salt and cation-radical solutions. While the formation of micro- and nanowires by means of dielectrophoresis with directly coupled electrodes has been thoroughly investigated in recent studies, we present here the first relevant example of metal and hybrid wire assembly obtained by floating potential dielectrophoresis. In this configuration, the assembly of micro- and nanowires is achieved by capacitively coupling a large electrode (bias electrode) to a conductive substrate (p-doped Si) separated by an insulating oxide layer. In contrast to former studies, this allows parallel production of micro- and nanowires with only one pair of electrodes connected to a sine wave generator. We further demonstrate that these structures are suitable probes for localized surface enhanced Raman spectroscopy (SERS).

Graphical abstract: Guided assembly of metal and hybrid conductive probes using floating potential dielectrophoresis

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Publication details

The article was received on 15 Sep 2010, accepted on 02 Dec 2010 and first published on 11 Jan 2011


Article type: Communication
DOI: 10.1039/C0NR00681E
Citation: Nanoscale, 2011,3, 937-940
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    Guided assembly of metal and hybrid conductive probes using floating potential dielectrophoresis

    J. Puigmartí-Luis, J. Stadler, D. Schaffhauser, Á. P. del Pino, B. R. Burg and P. S. Dittrich, Nanoscale, 2011, 3, 937
    DOI: 10.1039/C0NR00681E

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