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Issue 10, 2012
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Ag2Se micropatterns via viscoelastic flow-driven phase separation

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A novel approach to prepare micropatterns of metal chalcogenides is proposed by employing viscoelastic flow-driven patterning. A consecutive process involving deposition of the Se precursor on a pattern of a crystalline polymer, chemical reduction of the precursor into amorphous Se (a-Se), and short-time thermal annealing above the melting temperature of the patterned polymer generated regular patterns of a-Se. This work demonstrates patterns of periodic lines and circles which is driven by the viscoelastic polymer flow and the phase separation of Se from the polymer. Additional thermal annealing facilitated the lateral growth of trigonal-Se (t-Se) nanowires from the Se patterns. The growing t-Se nanowires eventually meet each other to produce a 2D network structure. Chemical transformation of the Se into Ag2Se generated metal chalcogenide network structures.

Graphical abstract: Ag2Se micropatterns via viscoelastic flow-driven phase separation

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The article was received on 04 Jan 2012, accepted on 26 Feb 2012 and first published on 29 Mar 2012

Article type: Paper
DOI: 10.1039/C2RA00024E
Citation: RSC Adv., 2012,2, 4343-4347
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    Ag2Se micropatterns via viscoelastic flow-driven phase separation

    M. Park, H. Cho, S. Park and U. Jeong, RSC Adv., 2012, 2, 4343
    DOI: 10.1039/C2RA00024E

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