TY - JOUR
T1 - Collapse of microfluidic channels/reservoirs in thin, soft epidermal devices
AU - Xue, Yeguang
AU - Kang, Daeshik
AU - Ma, Yinji
AU - Feng, Xue
AU - Rogers, John A.
AU - Huang, Yonggang
N1 - Funding Information:
X. F. acknowledge the support from the National Basic Research Program of China (Grant No. 2015CB351900 ) and National Natural Science Foundation of China (Grant No. 11320101001 ). Y. H. acknowledges the support from the NSF (Grant No. DMR1121262 , CMMI1300846 , CMMI1400169 and CMMI1534120 ) and the NIH (Grant No. R01EB019337 ).
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Self-collapse is a common problem encountered in fabrication of thin, soft epidermal microfluidic devices, due to the adhesion between top and bottom covers. Analytic models are developed for collapse of both long microfluidic channels and circular microfluidic reservoirs, with their covers modelled as plane-strain beam and thin plate, respectively. The analysis shows that a single parameter, the normalized work of adhesion, which combines the effects of channel/reservoir geometry, work of adhesion and bending stiffness of top and bottom channel/reservoir covers, controls different collapse states (no collapse, meta stable collapse and stable collapse) The established models agree well with the experimental observations, and provide guidelines to avoid the problem of self-collapse in design of epidermal microfluidic devices.
AB - Self-collapse is a common problem encountered in fabrication of thin, soft epidermal microfluidic devices, due to the adhesion between top and bottom covers. Analytic models are developed for collapse of both long microfluidic channels and circular microfluidic reservoirs, with their covers modelled as plane-strain beam and thin plate, respectively. The analysis shows that a single parameter, the normalized work of adhesion, which combines the effects of channel/reservoir geometry, work of adhesion and bending stiffness of top and bottom channel/reservoir covers, controls different collapse states (no collapse, meta stable collapse and stable collapse) The established models agree well with the experimental observations, and provide guidelines to avoid the problem of self-collapse in design of epidermal microfluidic devices.
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U2 - 10.1016/j.eml.2016.11.012
DO - 10.1016/j.eml.2016.11.012
M3 - Article
AN - SCOPUS:85004024026
VL - 11
SP - 18
EP - 23
JO - Extreme Mechanics Letters
JF - Extreme Mechanics Letters
SN - 2352-4316
ER -