TY - GEN
T1 - Regularization of pattern formation in metal/SMP bi-layer structures
AU - Chen, Zhongbi
AU - Kim, Yun Young
AU - Huang, Qiaojian
AU - Krishnaswamy, Sridhar
PY - 2011
Y1 - 2011
N2 - In this paper, we demonstrate a fabrication method for ordered self-assembly using pre-programmed shape memory polymer (SMP) as the substrate in an organic-inorganic bi-layer structure. By heating the hybrid structure above the SMP's shape recovery temperature, the substrate expands because of positive CTE in one direction, while in the perpendicular direction it shrinks due to shape memory effect overpowering thermal expansion. Consequently, the thin film is subjected to an orthogonal compression-tension stress field and forms unidirectional wavy patterns. We further validate our conceptual design by adjusting the strain level of pre-programmed SMP substrates. The present study is expected to offer a convenient and simple path of fabricating unidirectional wavy patterns. Moreover, selective growth and ordering of patterns can become possible.
AB - In this paper, we demonstrate a fabrication method for ordered self-assembly using pre-programmed shape memory polymer (SMP) as the substrate in an organic-inorganic bi-layer structure. By heating the hybrid structure above the SMP's shape recovery temperature, the substrate expands because of positive CTE in one direction, while in the perpendicular direction it shrinks due to shape memory effect overpowering thermal expansion. Consequently, the thin film is subjected to an orthogonal compression-tension stress field and forms unidirectional wavy patterns. We further validate our conceptual design by adjusting the strain level of pre-programmed SMP substrates. The present study is expected to offer a convenient and simple path of fabricating unidirectional wavy patterns. Moreover, selective growth and ordering of patterns can become possible.
KW - anisotropic patterns
KW - shape memory polymer (SMP)
KW - thin film
KW - wrinkles
UR - https://www.scopus.com/pages/publications/79956303116
UR - https://www.scopus.com/inward/citedby.url?scp=79956303116&partnerID=8YFLogxK
U2 - 10.1117/12.880514
DO - 10.1117/12.880514
M3 - Conference contribution
AN - SCOPUS:79956303116
SN - 9780819485434
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
T2 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
Y2 - 7 March 2011 through 10 March 2011
ER -