Spontaneous Droplet Motion on a Periodically Compliant Substrate.
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| Title: | Spontaneous Droplet Motion on a Periodically Compliant Substrate. |
|---|---|
| Authors: | Tianshu Liu1, Nadermann, Nichole2, Zhenping He2, Strogatz, Steven H.3, Chung-Yuen Hui1, Jagota, Anand2 anj6@lehigh.edu |
| Source: | Langmuir. May2017, Vol. 33 Issue 20, p4942-4947. 6p. |
| Subjects: | Droplets, Substrates (Materials science), Surface energy |
| Abstract: | Droplet motion arises in many natural phenomena, ranging from the familiar gravity-driven slip and arrest of raindrops on windows to the directed transport of droplets for water harvesting by plants and animals under dry conditions. Deliberate transportation and manipulation of droplets are also important in many technological applications, including droplet-based microfluidic chemical reactors and for thermal management. Droplet motion usually requires gradients of surface energy or temperature or external vibration to overcome contact angle hysteresis. Here, we report a new phenomenon in which a drying droplet placed on a periodically compliant surface undergoes spontaneous, erratic motion in the absence of surface energy gradients and external stimuli such as vibration. By modeling the droplet as a mass-spring system on a substrate with periodically varying compliance, we show that the stability of equilibrium depends on the size of the droplet. Specifically, if the center of mass of the drop lies at a stable equilibrium point of the system, it will stay there until evaporation reduces its size and this fixed point becomes unstable; with any small perturbation, the droplet then moves to one of its neighboring fixed points. [ABSTRACT FROM AUTHOR] |
| Copyright of Langmuir is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 123242587 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Spontaneous Droplet Motion on a Periodically Compliant Substrate. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tianshu+Liu%22">Tianshu Liu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Nadermann%2C+Nichole%22">Nadermann, Nichole</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhenping+He%22">Zhenping He</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Strogatz%2C+Steven+H%2E%22">Strogatz, Steven H.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Chung-Yuen+Hui%22">Chung-Yuen Hui</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jagota%2C+Anand%22">Jagota, Anand</searchLink><relatesTo>2</relatesTo><i> anj6@lehigh.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Langmuir%22">Langmuir</searchLink>. May2017, Vol. 33 Issue 20, p4942-4947. 6p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Droplets%22">Droplets</searchLink><br /><searchLink fieldCode="DE" term="%22Substrates+%28Materials+science%29%22">Substrates (Materials science)</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+energy%22">Surface energy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Droplet motion arises in many natural phenomena, ranging from the familiar gravity-driven slip and arrest of raindrops on windows to the directed transport of droplets for water harvesting by plants and animals under dry conditions. Deliberate transportation and manipulation of droplets are also important in many technological applications, including droplet-based microfluidic chemical reactors and for thermal management. Droplet motion usually requires gradients of surface energy or temperature or external vibration to overcome contact angle hysteresis. Here, we report a new phenomenon in which a drying droplet placed on a periodically compliant surface undergoes spontaneous, erratic motion in the absence of surface energy gradients and external stimuli such as vibration. By modeling the droplet as a mass-spring system on a substrate with periodically varying compliance, we show that the stability of equilibrium depends on the size of the droplet. Specifically, if the center of mass of the drop lies at a stable equilibrium point of the system, it will stay there until evaporation reduces its size and this fixed point becomes unstable; with any small perturbation, the droplet then moves to one of its neighboring fixed points. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Langmuir is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1021/acs.langmuir.7b01414 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 4942 Subjects: – SubjectFull: Droplets Type: general – SubjectFull: Substrates (Materials science) Type: general – SubjectFull: Surface energy Type: general Titles: – TitleFull: Spontaneous Droplet Motion on a Periodically Compliant Substrate. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tianshu Liu – PersonEntity: Name: NameFull: Nadermann, Nichole – PersonEntity: Name: NameFull: Zhenping He – PersonEntity: Name: NameFull: Strogatz, Steven H. – PersonEntity: Name: NameFull: Chung-Yuen Hui – PersonEntity: Name: NameFull: Jagota, Anand IsPartOfRelationships: – BibEntity: Dates: – D: 23 M: 05 Text: May2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 07437463 Numbering: – Type: volume Value: 33 – Type: issue Value: 20 Titles: – TitleFull: Langmuir Type: main |
| ResultId | 1 |
