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|Title:||Dynamics of wicking in silicon nanopillars fabricated with interference lithography and metal-assisted chemical etching|
|Source:||Mai, T.T., Lai, C.Q., Zheng, H., Balasubramanian, K., Leong, K.C., Lee, P.S., Lee, C., Choi, W.K. (2012-08-07). Dynamics of wicking in silicon nanopillars fabricated with interference lithography and metal-assisted chemical etching. Langmuir 28 (31) : 11465-11471. ScholarBank@NUS Repository. https://doi.org/10.1021/la302262g|
|Abstract:||The capillary rise of liquid on a surface, or "wicking", has potential applications in biological and industrial processes such as drug delivery, oil recovery, and integrated circuit chip cooling. This paper presents a theoretical study on the dynamics of wicking on silicon nanopillars based on a balance between the driving capillary forces and viscous dissipation forces. Our model predicts that the invasion of the liquid front follows a diffusion process and strongly depends on the structural geometry. The model is validated against experimental observations of wicking in silicon nanopillars with different heights synthesized by interference lithography and metal-assisted chemical etching techniques. Excellent agreement between theoretical and experimental results, from both our samples and data published in the literature, was achieved. © 2012 American Chemical Society.|
|Appears in Collections:||Staff Publications|
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