2021
DOI: 10.1021/acs.langmuir.1c00215
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Abstract: Pinning of liquid droplets on solid substrates is ubiquitous and plays an essential role in many applications, especially in various areas such as microfluidics and biology. Although pinning can often reduce the efficiency of various applications, a deeper understanding of this phenomenon can actually offer possibilities for technological exploitation. Here, by means of molecular dynamics simulation, we identify the conditions that lead to droplet pinning or depinning and discuss the effects of key parameters … Show more

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Cited by 13 publications
(14 citation statements)
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References 39 publications
(75 reference statements)
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“…This is particularly attractive for the development of various technologies in microfluidics, microfabrication, coatings, nanoscale actuation and energy conversion, and biology. Various possibilities for the design of gradient substrates have been reported. For example, durotaxis motion is caused by changes in stiffness along a substrate, as has been shown in various natural processes in biology (e.g., cell movement on tissues) , and in the case of real and in silico experiments with liquid droplets. Another characteristic example is the rugotaxis motion of droplets on wavy substrates with a gradient in the wavelength that characterizes their pattern. , Other possibilities include the use of wettability differences , and physical pinning . Recent work has also highlighted the possibility of unidirectional transport of small condensate droplets on asymmetric pillars or three-dimensional capillary ratchets .…”
Section: Introductionmentioning
confidence: 99%
“…This is particularly attractive for the development of various technologies in microfluidics, microfabrication, coatings, nanoscale actuation and energy conversion, and biology. Various possibilities for the design of gradient substrates have been reported. For example, durotaxis motion is caused by changes in stiffness along a substrate, as has been shown in various natural processes in biology (e.g., cell movement on tissues) , and in the case of real and in silico experiments with liquid droplets. Another characteristic example is the rugotaxis motion of droplets on wavy substrates with a gradient in the wavelength that characterizes their pattern. , Other possibilities include the use of wettability differences , and physical pinning . Recent work has also highlighted the possibility of unidirectional transport of small condensate droplets on asymmetric pillars or three-dimensional capillary ratchets .…”
Section: Introductionmentioning
confidence: 99%
“…The simulations are performed in the open-source software LAMMPS [48], which has been widely used to study fluid phenomena at the nanoscale, e.g. [27,33,[49][50][51][52][53][54][55][56] Argon is used as a fluid and Platinum is used for the solid walls. The interaction between particles are modeled using the conventional Lennard-Jones 12-6 potential Transport properties of liquid Argon are measured under MD simulations, with parameters given by Table I.…”
Section: Molecular-dynamics Simulationsmentioning
confidence: 99%
“…The simulations are performed in the open-source software LAMMPS [50], which has been widely used to study fluid phenomena at the nanoscale, e.g. [29,35,[51][52][53][54][55][56][57][58] Argon is used as a fluid and Platinum is used for the solid walls. The interaction between particles are modeled using the conventional Lennard-Jones 12-6 potential…”
Section: Molecular-dynamics Simulationsmentioning
confidence: 99%