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Author

Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Ag2Se micropatterns via viscoelastic flow-driven phase separation

Cited 2 times inthomson ciCited 2 times inthomson ci
Title
Ag2Se micropatterns via viscoelastic flow-driven phase separation
Author
Park, MinwooCho, HeesookPark, SoojinJeong, Unyong
Keywords
Chemical reduction; Chemical transformations; Crystalline polymers; Lateral growth; Metal chalcogenide; Micropatterns; Network structures; Periodic lines; Regular patterns; Thermal-annealing; Viscoelastic polymers
Issue Date
201205
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v.2, no.10, pp.4343 - 4347
Abstract
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.
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DOI
http://dx.doi.org/10.1039/c2ra00024e
ISSN
2046-2069
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