“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 16900 |
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In this paper, we show that laser speckle analysis (LSA) can provide valuable information about the structure of
crumpled thin sheets. Crumpling and folding of slender objects are present in several phenomena and in various
ranges of size, e.g., paper compaction, cortical folding in brains, DNA packing in viral capsids, and flower buds, to
name a few. The analysis of laser speckles, both numerical and graphical, is a source of information about the
activity of biological or non-biological materials, and the development of digital electronics, which brought the
ease of image processing, has opened new perspectives for a spectrum of LSA applications. LSA is applied on
randomly crumpled and one-, two-, and three-times folded papers, and appreciable differences in LSA parameters
are observed. The methodology can be applied for easy-to-implement quantitative assessment of similar
phenomena and samples.
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