Interfacial-entropy-driven thermophoretic tweezers.
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| Title: | Interfacial-entropy-driven thermophoretic tweezers. |
|---|---|
| Authors: | Lin, Linhan1,2, Peng, Xiaolei2, Mao, Zhangming3, Wei, Xiaoling4, Xie, Chong4, Zheng, Yuebing1,2 |
| Source: | Lab on a Chip. 9/21/2017, Vol. 17 Issue 18, p3061-3070. 10p. |
| Subjects: | Optical tweezers, Thermophoresis, Refractive index, Navier-Stokes equations, Electric field strength, Entropy |
| Abstract: | Directed migration of particles and molecules in a temperature gradient field, which is known as thermophoresis or the Soret effect, is of fundamental importance for mass transfer in colloid science and life sciences. However, thermophoretic tweezers that enable versatile particle manipulation have remained elusive due to the complex underlying physical forces in thermophoresis and the lack of general thermophilic particles above room temperature. Herein, we exploit entropic response and permittivity gradient at the particle–solvent interface to optically generated thermal gradient to achieve the thermophoretic trapping and dynamic manipulation of charged particles over an optothermal-responsive substrate. Engineering the interfacial properties, i.e., the surface charge of particles and the ionic strength of the solvent, further enhances the trapping efficiency. Through the rational design of optothermal potential profiles and substrate geometries, we have achieved various tweezing functionalities, including particle assembly, alignment, rotation and guiding, as well as precise transport of single nanoparticles. Based on the general concept of entropic change of polarized molecules structured at the particle–solvent interlayer, the thermophoretic tweezers are applicable to various types of particles, biological cells, and molecules and a wide range of solvents. [ABSTRACT FROM AUTHOR] |
| Copyright of Lab on a Chip is the property of Royal Society of Chemistry 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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| Items | – Name: Title Label: Title Group: Ti Data: Interfacial-entropy-driven thermophoretic tweezers. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lin%2C+Linhan%22">Lin, Linhan</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Peng%2C+Xiaolei%22">Peng, Xiaolei</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mao%2C+Zhangming%22">Mao, Zhangming</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Wei%2C+Xiaoling%22">Wei, Xiaoling</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Xie%2C+Chong%22">Xie, Chong</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Zheng%2C+Yuebing%22">Zheng, Yuebing</searchLink><relatesTo>1,2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Lab+on+a+Chip%22">Lab on a Chip</searchLink>. 9/21/2017, Vol. 17 Issue 18, p3061-3070. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Optical+tweezers%22">Optical tweezers</searchLink><br /><searchLink fieldCode="DE" term="%22Thermophoresis%22">Thermophoresis</searchLink><br /><searchLink fieldCode="DE" term="%22Refractive+index%22">Refractive index</searchLink><br /><searchLink fieldCode="DE" term="%22Navier-Stokes+equations%22">Navier-Stokes equations</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+field+strength%22">Electric field strength</searchLink><br /><searchLink fieldCode="DE" term="%22Entropy%22">Entropy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Directed migration of particles and molecules in a temperature gradient field, which is known as thermophoresis or the Soret effect, is of fundamental importance for mass transfer in colloid science and life sciences. However, thermophoretic tweezers that enable versatile particle manipulation have remained elusive due to the complex underlying physical forces in thermophoresis and the lack of general thermophilic particles above room temperature. Herein, we exploit entropic response and permittivity gradient at the particle–solvent interface to optically generated thermal gradient to achieve the thermophoretic trapping and dynamic manipulation of charged particles over an optothermal-responsive substrate. Engineering the interfacial properties, i.e., the surface charge of particles and the ionic strength of the solvent, further enhances the trapping efficiency. Through the rational design of optothermal potential profiles and substrate geometries, we have achieved various tweezing functionalities, including particle assembly, alignment, rotation and guiding, as well as precise transport of single nanoparticles. Based on the general concept of entropic change of polarized molecules structured at the particle–solvent interlayer, the thermophoretic tweezers are applicable to various types of particles, biological cells, and molecules and a wide range of solvents. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Lab on a Chip is the property of Royal Society of Chemistry 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: 10.1039/c7lc00432j Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 3061 Subjects: – SubjectFull: Optical tweezers Type: general – SubjectFull: Thermophoresis Type: general – SubjectFull: Refractive index Type: general – SubjectFull: Navier-Stokes equations Type: general – SubjectFull: Electric field strength Type: general – SubjectFull: Entropy Type: general Titles: – TitleFull: Interfacial-entropy-driven thermophoretic tweezers. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lin, Linhan – PersonEntity: Name: NameFull: Peng, Xiaolei – PersonEntity: Name: NameFull: Mao, Zhangming – PersonEntity: Name: NameFull: Wei, Xiaoling – PersonEntity: Name: NameFull: Xie, Chong – PersonEntity: Name: NameFull: Zheng, Yuebing IsPartOfRelationships: – BibEntity: Dates: – D: 21 M: 09 Text: 9/21/2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 14730197 Numbering: – Type: volume Value: 17 – Type: issue Value: 18 Titles: – TitleFull: Lab on a Chip Type: main |
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