| Surface hydrophilicity mediated migration of nano/microparticles under temperature gradient in a confined space | |
Xu, Haolan2; Zheng X(郑旭); Shi XH(施兴华)
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| Source Publication | JOURNAL OF COLLOID AND INTERFACE SCIENCE
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| 2023-05 | |
| Volume | 637Pages:489-499 |
| ISSN | 0021-9797 |
| Abstract | Hypothesis: Particle transport by a temperature gradient is prospective in many biomedical applications. However, the prevalence of boundary confinement in practical use introduces synergistic effects of thermophoresis and thermo osmosis, causing controversial phenomena and great difficulty in understanding the mechanisms. Experiments: We developed a microfluidic chip with a uniform temperature gradient and switchable sub strate hydrophilicity to measure the migrations of various particles (d = 200 nm 2 lm), through which the effects of particle thermophoresis and thermo osmotic flow from the substrate surface were decou pled. The contribution of substrate hydrophilicity on thermo osmosis was examined. Thermophoresis was measured to clarify its dependence on particle size and hydrophilicity. Findings: This paper reports the first experimental evidence of a large enthalpy dependent thermo osmotic mobility chi similar to Delta H on a hydrophobic polymer surface, which is 1 2 orders of magnitude larger than that on hydrophilic surfaces. The normalized Soret coefficient for polystyrene particles, ST/ d = 18.0 K 1 mu m( 1), is confirmed to be constant, which helps clarify the controversy of the size dependence. Besides, the Soret coefficient of hydrophobic proteins is approximately four times larger than that of hydrophilic extracellular vesicles. These findings suggest that the intrinsic slip on the hydrophobic surface could enhance both surface thermoosmosis and particle thermophoresis. (c) 2023 Elsevier Inc. All rights reserved. |
| Keyword | Thermophoresis Thermo osmosis Soret coefficient Hydrophobicity Nanoparticle |
| DOI | 10.1016/j.jcis.2023.01.112 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000927332500001 |
| WOS Research Area | Chemistry, Physical |
| WOS Subject | Chemistry |
| Funding Organization | Strategic Pri ority Research Program of the Chinese Academy of Sciences [XDB36000000, XDB22040403] ; CAS Key Research Program of Frontier Sciences [QYZDB SSW JSC036] ; Natural Science Foundation of Beijing [2184130, 1202023] ; National Natural Science Foundation of China [11672079, 12072082, 12072350, 11832017, 12125202] |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Shi, XH (corresponding author), Chinese Acad Sci, CAS Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, Lab Theoret & Computat Nanosci, Beijing 100190, Peoples R China. ; Zheng, X (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91810 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, CAS Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, Lab Theoret & Computat Nanosci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, Haolan,Zheng X,Shi XH. Surface hydrophilicity mediated migration of nano/microparticles under temperature gradient in a confined space[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2023,637:489-499.Rp_Au:Shi, XH (corresponding author), Chinese Acad Sci, CAS Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, Lab Theoret & Computat Nanosci, Beijing 100190, Peoples R China., Zheng, X (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| APA | Xu, Haolan,郑旭,&施兴华.(2023).Surface hydrophilicity mediated migration of nano/microparticles under temperature gradient in a confined space.JOURNAL OF COLLOID AND INTERFACE SCIENCE,637,489-499. |
| MLA | Xu, Haolan,et al."Surface hydrophilicity mediated migration of nano/microparticles under temperature gradient in a confined space".JOURNAL OF COLLOID AND INTERFACE SCIENCE 637(2023):489-499. |
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| Jp2023Fa160.pdf（2790KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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