Experimental analysis for the effect of dynamic capillarity on stress transformation in porous silicon | Zendy

Wei Qiu | Zendy; Yilan Kang | Zendy; Qiu Li | Zendy; Zhenkun Lei | Zendy; QingHua Qin | Zendy

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Experimental analysis for the effect of dynamic capillarity on stress transformation in porous silicon

Author(s) -

Wei Qiu,

Yilan Kang,

Qiu Li,

Zhenkun Lei,

QingHua Qin

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2838716

Subject(s) - materials science , stress (linguistics) , porous silicon , silicon , raman spectroscopy , transformation (genetics) , coupling (piping) , porous medium , porosity , composite material , optics , metallurgy , chemistry , physics , philosophy , linguistics , biochemistry , gene

The evolution of real-time stress in porous silicon (PS) during drying is investigated using micro-Raman spectroscopy. The results show that the PS sample underwent non-negligible stress when immersed in liquid and suffered a stress impulsion during drying. Such nonlinear transformation and nonhomogeneneous distribution of stress are regarded as the coupling effects of several physical phenomena attributable to the intricate topological structure of PS. The effect of dynamic capillarity can induce microcracks and even collapse in PS structures during manufacture and storage. © 2008 American Institute of Physics.

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