TY - JOUR
T1 - Bifurcated mechanical behavior of deformed periodic porous solids
AU - Singamaneni, Srikanth
AU - Bertoldi, Katia
AU - Chang, Sehoon
AU - Jang, Ji Hyun
AU - Young, Seth L.
AU - Thomas, Edwin L.
AU - Boyce, Mary C.
AU - Tsukruk, Vladimir V.
PY - 2009/5/8
Y1 - 2009/5/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=66149091932&partnerID=8YFLogxK
U2 - 10.1002/adfm.200801675
DO - 10.1002/adfm.200801675
M3 - Article
AN - SCOPUS:66149091932
SN - 1616-301X
VL - 19
SP - 1426
EP - 1436
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 9
ER -