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Jang, Ji-Hyun
Nano Crystal Lab (NCL)
Research Interests
  • Graphene, photoelectrochemical (PEC) H2 generation, ORR/OER, SERS,3D-Nanostructures, supercapacitors, thermoelectric materials

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Bifurcated Mechanical Behavior of Deformed Periodic Porous Solids

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Title
Bifurcated Mechanical Behavior of Deformed Periodic Porous Solids
Author
Singamaneni, SrikanthBertoldi, KatiaChang, SehoonJang, Ji-HyunYoung, Seth L.Thomas, Edwin L.Boyce, Mary C.Tsukruk, Vladimir V.
Keywords
Acrylic acids; Critical strains; Cylindrical Pores; Interference lithography; Mechanical behavior; Mechanical instabilities; Micro-porous structure; Porous microstructure; Porous solids; Solvent evaporation; Structural transformation; Submicron scale; Tunability
Issue Date
2009-05
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS, v.19, no.9, pp.1426 - 1436
Abstract
The transformation of periodic microporous structures fabricated by interference lithography followed by their freezing below glass transition is described. Periodic porous microstructures subjected to internal compressive stresses can undergo sudden structural transformation at a critical strain. The pattern transformation of collapsed pores is caused by the stresses originated during the polymerization of acrylic acid (rubbery component) inside of cylindrical pores and the subsequent solvent evaporation in the organized microporous structure. By confining the polymerization of acrylic acid to localized porous areas complex microscopic periodic structures can be obtained. The control over the mechanical instabilities in periodic porous solids at a sub-micron scale demonstrated here suggests the potential mechanical tunability of photonic, transport, adhesive, and phononic properties of such periodic porous solids.
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DOI
10.1002/adfm.200801675
ISSN
1616-301X
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ECHE_Journal Papers
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