2017
DOI: 10.1039/c6sm02095j
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Elastocapillary bending of microfibers around liquid droplets

Abstract: We report on the elastocapillary deformation of flexible microfibers in contact with liquid droplets. A fiber is observed to bend more as the size of the contacting droplet is increased. At a critical droplet size, proportional to the bending elastocapillary length, the fiber is seen to spontaneously wind around the droplet. To rationalize these observations, we invoke a minimal model based on elastic beam theory, and find agreement with experimental data. Further energetic considerations provide a consistent … Show more

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Cited by 25 publications
(25 citation statements)
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“…If the length of the rod exceeds a critical capillary-bending length scale`B, the rod buckles. b) Coiling of a rod inside a droplet (Schulman et al, 2017).…”
Section: A Rod In a Drop: Capillary Bucklingmentioning
confidence: 99%
“…If the length of the rod exceeds a critical capillary-bending length scale`B, the rod buckles. b) Coiling of a rod inside a droplet (Schulman et al, 2017).…”
Section: A Rod In a Drop: Capillary Bucklingmentioning
confidence: 99%
“…Therein, Chakrabarti and Chaudhury suggest that this larger slope value is due to the film material having a low shear modulus (and therefore a large elastocapillary length γ/µ). However, the shear modulus of SIS is approximately 0.27 MPa [12], which is much higher than the modulus of the gel used in [21]. Moreover, we can approximate the elastocapillary length γ/µ of SIS given its surface tension γ ≈ 30 mN/m [32,33,34] and find that γ/µ ≈ 110 nm.…”
Section: Wavelengthmentioning
confidence: 99%
“…DOI: 10.1103/PhysRevLett.118.198002 The physics of liquid droplets in contact with soft or deformable solids, elastocapillarity, is an active subject of research. Between capillary origami and wrinkling instabilities of thin films [1][2][3][4][5][6][7][8][9], the bending, coiling, and winding of slender structures [10][11][12][13][14][15][16], and elasticitymediated propulsion of droplets [17][18][19], there is no shortage of complexity, self-assembly, or beautiful examples of pattern formation in the field. In addition, some recent results have forced us to question familiar concepts of solid-liquid interactions.…”
mentioning
confidence: 99%