Spontaneous drying induced self-transformation of highly-porous Si layers into oriented micro-tubular hairs is reported. Main mechanisms involved in such a self-formation of the porous silicon hairs are analyzed: the large capillary stresses at the liquid evaporation from the pores during the drying process, existence of lateral in-plane stresses at the interface "PS layer - bulk Si substrate", engineering of in-depth mechanical stress gradient and preferential cracking of the porous layer along the  and [1$ \bar 1 $0] directions. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
|Original language||American English|
|Number of pages||3|
|Journal||Physica Status Solidi (C) Current Topics in Solid State Physics|
|State||Published - 1 Jun 2011|
Skryshevsky, V. A., Vorobey, G., Jamois, C., Munguia, J., & Lysenko, V. (2011). Drying induced self-formation of semi-ordered nano-porous silicon micro-hairs. Physica Status Solidi (C) Current Topics in Solid State Physics, 1805-1807. https://doi.org/10.1002/pssc.201000096