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A Lubricating Oil Condition Monitoring System Based on Wear Particle Kinematic Analysis in Microfluid for Intelligent Aeroengine. MICROMACHINES 2021; 12:mi12070748. [PMID: 34202345 PMCID: PMC8303112 DOI: 10.3390/mi12070748] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 11/17/2022]
Abstract
Lubricating oil monitoring technology is a commonly used method in aeroengine condition monitoring, which includes particle counting technology, as well as spectral and ferrography technology in offline monitoring. However, these technologies only analyze the characteristics of wear particles and rely on physical and chemical analysis techniques to monitor the oil quality. In order to further advance offline monitoring technology, this paper explores the potential role of differences in wear particle kinematic characteristics in recognizing changes in wear particle diameter and oil viscosity. Firstly, a kinematic force analysis of the wear particles in the microfluid was carried out. Accordingly, a microfluidic channel conducive to observing the movement characteristics of particles was designed. Then, the wear particle kinematic analysis system (WKAS) was designed and fabricated. Secondly, a real-time tracking velocity measurement algorithm was developed by using the Gaussian mixture model (GMM) and the blob-tracking algorithm. Lastly, the WKAS was applied to a pin–disc tester, and the experimental results show that there is a corresponding relationship between the velocity of the particles and their diameter and the oil viscosity. Therefore, WKAS provides a new research idea for intelligent aeroengine lubricating oil monitoring technology. Future work is needed to establish a quantitative relationship between wear particle velocity and particle diameter, density, and oil viscosity.
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2
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Ma C, Chen Y, Sun GE, Li QM, Gao W, Jiang Q. Understanding water slippage through carbon nanotubes. Phys Chem Chem Phys 2021; 23:14737-14745. [PMID: 34190267 DOI: 10.1039/d1cp01148k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is a formidable challenge to understand water slippage through carbon nanotubes (CNTs), despite its great significance in fundamental research and technology. Herein, we propose an effective scheme to describe water slippage properties by extending two friction models - the phononic friction model and Einstein's diffusion model, both relying on the potential corrugation of water slippage. Our scheme effectively captures the tube-size effect on the viscosity and slippage of water molecules through CNTs. It also identifies the experimentally reported size-dependent transition from continuum to sub-continuum flow and further reveals that this transition is likely to be determined by the hydrogen bond instead of the structural transition or entropic change. Besides, the size-dependence of slip lengths is found to be controllable by temperature. Our methods are thus expected to be a useful basis for further studies on substance transport under confinement.
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Affiliation(s)
- Cong Ma
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China.
| | - Yun Chen
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China.
| | - Guo En Sun
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China.
| | - Quan Ming Li
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China.
| | - Wang Gao
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China.
| | - Qing Jiang
- Key Laboratory of Automobile Materials (Jilin University), Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130022, China.
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3
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Nakano H, Sasa SI. Microscopic determination of macroscopic boundary conditions in Newtonian liquids. Phys Rev E 2019; 99:013106. [PMID: 30780218 DOI: 10.1103/physreve.99.013106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Indexed: 06/09/2023]
Abstract
We study boundary conditions applied to the macroscopic dynamics of Newtonian liquids from the view of microscopic particle systems. We assume the existence of microscopic boundary conditions that are uniquely determined from a microscopic description of the fluid and the wall. By using molecular dynamical simulations, we examine a possible form of the microscopic boundary conditions. In the macroscopic limit, we may introduce a scaled velocity field by ignoring the higher-order terms in the velocity field that is calculated from the microscopic boundary condition and standard fluid mechanics. We define macroscopic boundary conditions as the boundary conditions that are imposed on the scaled velocity field. The macroscopic boundary conditions contain a few phenomenological parameters for an amount of slip, which are related to a functional form of the given microscopic boundary condition. By considering two macroscopic limits of the nonequilibrium steady state, we propose two different frameworks for determining macroscopic boundary conditions.
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Affiliation(s)
| | - Shin-Ichi Sasa
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
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4
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Hénot M, Chennevière A, Drockenmuller E, Léger L, Restagno F. Comparison of the Slip of a PDMS Melt on Weakly Adsorbing Surfaces Measured by a New Photobleaching-Based Technique. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00601] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marceau Hénot
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Alexis Chennevière
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
- Laboratoire Léon
Brillouin CEA, CNRS, CEA Saclay, 91191 Gif sur Yvette Cedex, France
| | - Eric Drockenmuller
- Univ
Lyon, Université Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR 5223, F-69003 Lyon, France
| | - Liliane Léger
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
| | - Frédéric Restagno
- Laboratoire
de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay, Cedex, France
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5
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Ren Z, Huang X, Liu H. Wall slip velocity measurement of molten polypropylene in capillary flow based on length-corrected Mooney technique. J Appl Polym Sci 2016. [DOI: 10.1002/app.44589] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhong Ren
- School of Mechanical and Electrical Engineering; Nanchang University; Nanchang 330031 People's Republic of China
- Key Laboratory of Optic-electronic and Communication; Jiangxi Science and Technology Normal University; Nanchang 330038 People's Republic of China
| | - Xingyuan Huang
- School of Mechanical and Electrical Engineering; Nanchang University; Nanchang 330031 People's Republic of China
| | - Hesheng Liu
- School of Mechanical and Electrical Engineering; Nanchang University; Nanchang 330031 People's Republic of China
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6
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Schäffel D, Koynov K, Vollmer D, Butt HJ, Schönecker C. Local Flow Field and Slip Length of Superhydrophobic Surfaces. PHYSICAL REVIEW LETTERS 2016; 116:134501. [PMID: 27081981 DOI: 10.1103/physrevlett.116.134501] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Indexed: 06/05/2023]
Abstract
While the global slippage of water past superhydrophobic surfaces has attracted wide interest, the local distribution of slip still remains unclear. Using fluorescence correlation spectroscopy, we performed detailed measurements of the local flow field and slip length for water in the Cassie state on a microstructured superhydrophobic surface. We revealed that the local slip length is finite, nonconstant, anisotropic, and sensitive to the presence of surfactants. In combination with numerical calculations of the flow, we can explain all these properties by the local hydrodynamics.
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Affiliation(s)
- David Schäffel
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Doris Vollmer
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
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7
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Ponjavic A, Dench J, Morgan N, Wong JSS. In situ viscosity measurement of confined liquids. RSC Adv 2015. [DOI: 10.1039/c5ra19245e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Viscosity heterogeneity in a thin glycerol film (170 nm) at high pressure was observed with fluorescence lifetime measurements.
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Affiliation(s)
- A. Ponjavic
- Department of Mechanical Engineering
- Imperial College London
- UK
| | - J. Dench
- Department of Mechanical Engineering
- Imperial College London
- UK
| | - N. Morgan
- Department of Mechanical Engineering
- Imperial College London
- UK
- Shell Global Solutions (UK) Ltd
- Manchester
| | - J. S. S. Wong
- Department of Mechanical Engineering
- Imperial College London
- UK
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8
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Coupling of fluorescence correlation spectroscopy with capillary and microchannel analytical systems and its applications. Electrophoresis 2014; 35:2267-78. [DOI: 10.1002/elps.201300648] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 03/10/2014] [Accepted: 03/21/2014] [Indexed: 02/03/2023]
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9
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Schaeffel D, Yordanov S, Schmelzeisen M, Yamamoto T, Kappl M, Schmitz R, Dünweg B, Butt HJ, Koynov K. Hydrodynamic boundary condition of water on hydrophobic surfaces. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:051001. [PMID: 23767478 DOI: 10.1103/physreve.87.051001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/11/2013] [Indexed: 06/02/2023]
Abstract
By combining total internal reflection fluorescence cross-correlation spectroscopy with Brownian dynamics simulations, we were able to measure the hydrodynamic boundary condition of water flowing over a smooth solid surface with exceptional accuracy. We analyzed the flow of aqueous electrolytes over glass coated with a layer of poly(dimethylsiloxane) (advancing contact angle Θ = 108°) or perfluorosilane (Θ = 113°). Within an error of better than 10 nm the slip length was indistinguishable from zero on all surfaces.
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Affiliation(s)
- David Schaeffel
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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10
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Feuillebois F, Ghalya N, Sellier A, Elasmi L. Influence of wall slip in dilute suspensions. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1742-6596/392/1/012012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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11
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Koynov K, Butt HJ. Fluorescence correlation spectroscopy in colloid and interface science. Curr Opin Colloid Interface Sci 2012. [DOI: 10.1016/j.cocis.2012.09.003] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Schmitz R, Yordanov S, Butt HJ, Koynov K, Dünweg B. Studying flow close to an interface by total internal reflection fluorescence cross-correlation spectroscopy: quantitative data analysis. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:066306. [PMID: 22304189 DOI: 10.1103/physreve.84.066306] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Indexed: 05/31/2023]
Abstract
Total internal reflection fluorescence cross-correlation spectroscopy (TIR-FCCS) has recently [S. Yordanov et al., Optics Express 17, 21149 (2009)] been established as an experimental method to probe hydrodynamic flows near surfaces, on length scales of tens of nanometers. Its main advantage is that fluorescence occurs only for tracer particles close to the surface, thus resulting in high sensitivity. However, the measured correlation functions provide only rather indirect information about the flow parameters of interest, such as the shear rate and the slip length. In the present paper, we show how to combine detailed and fairly realistic theoretical modeling of the phenomena by Brownian dynamics simulations with accurate measurements of the correlation functions, in order to establish a quantitative method to retrieve the flow properties from the experiments. First, Brownian dynamics is used to sample highly accurate correlation functions for a fixed set of model parameters. Second, these parameters are varied systematically by means of an importance-sampling Monte Carlo procedure in order to fit the experiments. This provides the optimum parameter values together with their statistical error bars. The approach is well suited for massively parallel computers, which allows us to do the data analysis within moderate computing times. The method is applied to flow near a hydrophilic surface, where the slip length is observed to be smaller than 10nm, and, within the limitations of the experiments and the model, indistinguishable from zero.
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Affiliation(s)
- R Schmitz
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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13
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Vinogradova OI, Belyaev AV. Wetting, roughness and flow boundary conditions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:184104. [PMID: 21508475 DOI: 10.1088/0953-8984/23/18/184104] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We discuss how the wettability and roughness of a solid impacts its hydrodynamic properties. We see in particular that hydrophobic slippage can be dramatically affected by the presence of roughness. Owing to the development of refined methods for setting very well controlled micro- or nanotextures on a solid, these effects are being exploited to induce novel hydrodynamic properties, such as giant interfacial slip, superfluidity, mixing and low hydrodynamic drag, that could not be achieved without roughness.
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Affiliation(s)
- Olga I Vinogradova
- A N Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, 119991 Moscow, Russia.
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15
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Lee SW, Kinoshita H, Noji H, Fujii T, Yamamoto T. Biomolecular nano-flow-sensor to measure near-surface flow. NANOSCALE RESEARCH LETTERS 2009; 5:296-301. [PMID: 20672045 PMCID: PMC2894360 DOI: 10.1007/s11671-009-9479-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Accepted: 10/28/2009] [Indexed: 05/29/2023]
Abstract
We have proposed and experimentally demonstrated that the measurement of the near-surface flow at the interface between a liquid and solid using a 10 nm-sized biomolecular motor of F1-ATPase as a nano-flow-sensor. For this purpose, we developed a microfluidic test-bed chip to precisely control the liquid flow acting on the F1-ATPase. In order to visualize the rotation of F1-ATPase, several hundreds nanometer-sized particle was immobilized at the rotational axis of F1-ATPase to enhance the rotation to be detected by optical microscopy. The rotational motion of F1-ATPase, which was immobilized on an inner surface of the test-bed chip, was measured to obtain the correlation between the near-surface flow and the rotation speed of F1-ATPase. As a result, we obtained the relationship that the rotation speed of F1-ATPase was linearly decelerated with increasing flow velocity. The mechanism of the correlation between the rotation speed and the near-surface flow remains unclear, however the concept to use biomolecule as a nano-flow-sensor was proofed successfully.(See supplementary material 1).
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Affiliation(s)
- Sang-Wook Lee
- Department of Mechanical and Control Engineering, Tokyo Institute of Technology, Ishikawadai 1-314, Ookayama 2-12-1 Meguro-ku, Tokyo, 152-8550, Japan.
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16
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Yordanov S, Best A, Butt HJ, Koynov K. Direct studies of liquid flows near solid surfaces by total internal reflection fluorescence cross-correlation spectroscopy. OPTICS EXPRESS 2009; 17:21149-21158. [PMID: 19997354 DOI: 10.1364/oe.17.021149] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present a new method to study flow of liquids near solid surface: Total internal reflection fluorescence cross-correlation spectroscopy (TIR-FCCS). Fluorescent tracers flowing with the liquid are excited by evanescent light, produced by epi-illumination through the periphery of a high numerical aperture oil-immersion objective. The time-resolved fluorescence intensity signals from two laterally shifted observation volumes, created by two confocal pinholes are independently measured. The cross-correlation of these signals provides information of the tracers' velocities. By changing the evanescent wave penetration depth, flow profiling at distances less than 200 nm from the interface can be performed. Due to the high sensitivity of the method fluorescent species with different size, down to single dye molecules can be used as tracers. We applied this method to study the flow of aqueous electrolyte solutions near a smooth hydrophilic surface and explored the effect of several important parameters, e.g. tracer size, ionic strength, and distance between the observation volumes.
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Affiliation(s)
- Stoyan Yordanov
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany
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17
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Cao BY, Sun J, Chen M, Guo ZY. Molecular momentum transport at fluid-solid interfaces in MEMS/NEMS: a review. Int J Mol Sci 2009; 10:4638-4706. [PMID: 20087458 PMCID: PMC2808004 DOI: 10.3390/ijms10114638] [Citation(s) in RCA: 218] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Revised: 10/17/2009] [Accepted: 10/26/2009] [Indexed: 11/17/2022] Open
Abstract
This review is focused on molecular momentum transport at fluid-solid interfaces mainly related to microfluidics and nanofluidics in micro-/nano-electro-mechanical systems (MEMS/NEMS). This broad subject covers molecular dynamics behaviors, boundary conditions, molecular momentum accommodations, theoretical and phenomenological models in terms of gas-solid and liquid-solid interfaces affected by various physical factors, such as fluid and solid species, surface roughness, surface patterns, wettability, temperature, pressure, fluid viscosity and polarity. This review offers an overview of the major achievements, including experiments, theories and molecular dynamics simulations, in the field with particular emphasis on the effects on microfluidics and nanofluidics in nanoscience and nanotechnology. In Section 1 we present a brief introduction on the backgrounds, history and concepts. Sections 2 and 3 are focused on molecular momentum transport at gas-solid and liquid-solid interfaces, respectively. Summary and conclusions are finally presented in Section 4.
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Affiliation(s)
- Bing-Yang Cao
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China; E-Mails:
(M.C.);
(Z.G.)
| | - Jun Sun
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China; E-Mails:
(M.C.);
(Z.G.)
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; E-Mail:
(J.S.)
| | - Min Chen
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China; E-Mails:
(M.C.);
(Z.G.)
| | - Zeng-Yuan Guo
- Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China; E-Mails:
(M.C.);
(Z.G.)
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18
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Tabeling P. A brief introduction to slippage, droplets and mixing in microfluidic systems. LAB ON A CHIP 2009; 9:2428-2436. [PMID: 19680569 DOI: 10.1039/b904937c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- P Tabeling
- MMN, Gulliver, ESPCI ParisTech, 10 rue Vauquelin, 75005, France
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19
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Analysis of protein mobilities and interactions in living cells by multifocal fluorescence fluctuation microscopy. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2009; 38:813-28. [DOI: 10.1007/s00249-009-0499-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2009] [Revised: 05/24/2009] [Accepted: 05/25/2009] [Indexed: 11/25/2022]
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20
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Kahl V, Hennig M, Maier B, Rädler JO. Conformational dynamics of DNA-electrophoresis on cationic membranes. Electrophoresis 2009; 30:1276-81. [DOI: 10.1002/elps.200800430] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Vinogradova OI, Koynov K, Best A, Feuillebois F. Direct measurements of hydrophobic slippage using double-focus fluorescence cross-correlation. PHYSICAL REVIEW LETTERS 2009; 102:118302. [PMID: 19392250 DOI: 10.1103/physrevlett.102.118302] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Indexed: 05/27/2023]
Abstract
We report the results of direct measurements of velocity profiles in a microchannel with hydrophobic and hydrophilic walls, using a new high-precision method of double-focus spatial fluorescence cross correlation under a confocal microscope. In the vicinity of both walls the measured velocity profiles do not go to zero by supplying a plateau of constant velocity. This apparent slip is proven to be due to a Taylor dispersion, an augmentation by shear diffusion of nanotracers in the direction of flow. Comparing the velocity profiles near the hydrophobic and hydrophilic walls for various conditions shows that there is a true slip length due to hydrophobicity. This length, of the order of several tens of nanometers, is independent of the electrolyte concentration and shear rate.
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Affiliation(s)
- Olga I Vinogradova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, 119991 Moscow, Russia
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22
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Kiseleva OA, Sobolev VD, Semenov DA, Ershov AP, Sergeeva IP, Churaev NV. Flow of solutions in thin capillaries coated with an adsorbed polyelectrolyte lyer. COLLOID JOURNAL 2009. [DOI: 10.1134/s1061933x09010098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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24
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Blancquaert Y, Gao J, Derouard J, Delon A. Spatial fluorescence cross-correlation spectroscopy by means of a spatial light modulator. JOURNAL OF BIOPHOTONICS 2008; 1:408-418. [PMID: 19343664 DOI: 10.1002/jbio.200810007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Spatial fluorescence cross-correlation spectroscopy is a rarely investigated version of fluorescence correlation spectroscopy, in which the fluorescence signals from different observation volumes are cross-correlated. In the reported experiments, two observation volumes, typically shifted by a few microm, are produced, with a spatial light modulator and two adjustable pinholes. We illustrated the feasibility and potentiality of this technique by: i) measuring molecular flows, in the range 0.2-1.5 microm/ms, of solutions seeded with fluorescent nanobeads or rhodamine molecules (simulating active transport phenomenons); ii) investigating the permeability of the phospholipidic membrane of giant unilamellar vesicles versus hydrophilic or hydrophobic molecules (in that case the laser spots were set on both sides of the membrane). Theoretical descriptions are proposed together with a discussion about fluorescence-correlation-spectroscopy-based, alternative methods.
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Affiliation(s)
- Yoann Blancquaert
- Laboratoire de Spectrométrie Physique, Université Grenoble I - UMR 5588 CNRS BP 87, 38402, Saint Martin d'Hères Cedex, France
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25
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Lasne D, Maali A, Amarouchene Y, Cognet L, Lounis B, Kellay H. Velocity profiles of water flowing past solid glass surfaces using fluorescent nanoparticles and molecules as velocity probes. PHYSICAL REVIEW LETTERS 2008; 100:214502. [PMID: 18518607 DOI: 10.1103/physrevlett.100.214502] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2007] [Indexed: 05/26/2023]
Abstract
Measurements of the velocity profile of water flowing on a glass surface using fluorescent nanoparticles and single fluorescent molecules as velocity probes show that the no slip boundary condition holds down to at least 10 nm from the surface. For water flowing on a hydrophobic solid surface, silanized glass, the no slip boundary condition fails, and a slip length of 45 nm is measured. These velocity measurements are complemented with atomic force microscopy measurements of dissipation on a small sphere oscillating near the surface with results in agreement with the velocity profiles.
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Affiliation(s)
- D Lasne
- Université Bordeaux 1, Centre de Physique Moléculaire Optique et Hertzienne, 351 cours de la Libération, 33405, Talence, France
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Tandon V, Kirby BJ. Zeta potential and electroosmotic mobility in microfluidic devices fabricated from hydrophobic polymers: 2. Slip and interfacial water structure. Electrophoresis 2008; 29:1102-14. [PMID: 18306185 DOI: 10.1002/elps.200800735] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We discuss the structure of water at hydrophobic interfaces from the standpoint of its impact on electrokinetic phenomena in microfluidic devices fabricated from hydrophobic polymers such as Teflon or Zeonor. Water structuring at hydrophobic interfaces has been described as a source of interfacial charge (see Part 1, this issue), and dewetting phenomena, whether via depletion layers or nanobubbles, contribute to slip and enhanced apparent electrokinetic potentials. Issues concerning the impact of hydrodynamic slip and the role of diffuse interfacial structures are discussed. These issues are coupled with each other and with interfacial charge concerns, providing challenges for measurements of individual parameters.
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Affiliation(s)
- Vishal Tandon
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
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27
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Petrov EP, Schwille P. State of the Art and Novel Trends in Fluorescence Correlation Spectroscopy. SPRINGER SERIES ON FLUORESCENCE 2008. [DOI: 10.1007/4243_2008_032] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Cottin-Bizonne C, Steinberger A, Cross B, Raccurt O, Charlaix E. Nanohydrodynamics: the intrinsic flow boundary condition on smooth surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:1165-1172. [PMID: 18266337 DOI: 10.1021/la7024044] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A dynamic surface force apparatus is used to determine the intrinsic flow boundary condition of two simple liquids, water and dodecane, on various smooth surfaces. We demonstrate the impact of experimental errors and data analysis on the accuracy of slip length determination. In all systems investigated, the dissipation is described by a well-defined boundary condition accounting for a whole range of separation, film thickness, and shear rate. A no-slip boundary condition is found in all wetting situations. On strongly hydrophobic surfaces, water undergoes finite slippage that increases with hydrophobicity. We also compare the relative influence of hydrophobicity and liquid viscosity on boundary flow by using water-glycerol mixtures with similar wetting properties.
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29
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Fetzer R, Münch A, Wagner B, Rauscher M, Jacobs K. Quantifying hydrodynamic slip: a comprehensive analysis of dewetting profiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10559-66. [PMID: 17803324 DOI: 10.1021/la7010698] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
To characterize nontrivial boundary conditions of a liquid flowing past a solid, the slip length is commonly used as a measure. From the profile of a retracting liquid front (e.g., measured with atomic force microscopy), the slip length can be extracted with the help of a Stokes model for a thin liquid film dewetting from a solid substrate. Specifically, we use a lubrication model derived from the Stokes model for strong slippage and linearize the film profile around the flat, unperturbed film. For small slip lengths, we expand the linearized full Stokes model for small slopes up to third order. Using the respective model, we obtain, in addition to the slip length, the capillary number, from which we can estimate the viscosity of the fluid film. We compare numerical and experimental results, test the consistency and the validity of the models/approximations, and give an easy-to-follow guide of how they can be used to analyze experiments.
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Affiliation(s)
- R Fetzer
- Department of Experimental Physics, Saarland University, D-66123 Saarbrücken, Germany.
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30
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Dertinger T, von der Hocht I, Benda A, Hof M, Enderlein J. Surface sticking and lateral diffusion of lipids in supported bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:9339-44. [PMID: 17042551 DOI: 10.1021/la061389s] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The diffusion of fluorescently labeled lipids in supported bilayers is studied using two different methods: Z-scan fluorescence correlation spectroscopy (z-scan FCS) and two-focus fluorescence correlation spectroscopy (2f-FCS). It is found that the data can be fitted consistently only when taking into account partial sticking of the labeled lipids to the supporting glass surface. A kinetic reaction-diffusion model is developed and applied to the data. We find a very slow sticking rate which, however, when neglected, leads to strongly varying estimates of the free diffusion coefficient. The study reveals a strong sensitivity of FCS on even slight binding/unbinding kinetics of the labeled molecules, which has significance for related diffusion measurements in cellular lipid membranes.
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Affiliation(s)
- Thomas Dertinger
- Institute for Biological Information Processing I, Forschungszentrum Jülich, D-52425 Jülich, Germany
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31
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Bayer J, Rädler JO. DNA microelectrophoresis using double focus fluorescence correlation spectroscopy. Electrophoresis 2006; 27:3952-63. [PMID: 17054090 DOI: 10.1002/elps.200500947] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Double focus fluorescence correlation spectroscopy (dfFCS) was used to determine electrophoretic mobilities of short double-stranded DNA (dsDNA)-fragments (75 base pairs (bp) -1019 bp) in microfluidic channels. The electrokinetic flow profile across a microchannel was measured with 1 microm spatial resolution and separated in electroosmotic and electrophoretic contributions. Experiments show that the free solution mobility is independent of DNA length. The diffusion constant is additionally determined by FCS and follows a length dependent rod-diffusion model. We interpret the electrophoretic mobilities using a modified Nernst Einstein relation, which additionally takes Manning condensation and counterion induced hydrodynamic retardation forces into account. In 3% w/v polyethylene oxide (PEO)-network (M(r) 3 .10(5) Dalton) the electrophoretic velocities become size-dependent with a power-law exponent be-tween 0.28 and 0.31. Mixtures of dsDNA-fragments exhibit distinguishable peaks in the dfFCS cross-correlation function. The potential of dfFCS for realtime micro-analysis in terms of speed and spatial resolution is discussed.
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Affiliation(s)
- Johannes Bayer
- Center for Nanoscience, Department für Physik, Ludwig-Maximilians-Universität München, Munich Germany
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32
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Fan TH, Vinogradova OI. Hydrodynamic resistance of close-approached slip surfaces with a nanoasperity or an entrapped nanobubble. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 72:066306. [PMID: 16486058 DOI: 10.1103/physreve.72.066306] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2005] [Indexed: 05/06/2023]
Abstract
We present a general solution of hydrodynamic resistance of close-approached slippery surfaces with a nanoasperity or a nanobubble as an idealized roughness effect. Based on Reynolds' lubrication theory and a simple slip boundary condition, the pressure distribution in the thin liquid film is predicted analytically and the total hydrodynamic resistance force at limiting cases are formulated in terms of correction functions to the Taylor's equation. Accessible parameters are included for the drainage experiment using atomic force microscope or surface force apparatus. We provide case studies to demonstrate the implication of roughness effect and the possible uncertainties involved in the dynamic force measurement. We found that in the lubrication regime, the hydrodynamic resistance is dominated by the local behavior near the asperity, thus the apparent slip length can not always represent the surface roughness.
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Affiliation(s)
- Tai-Hsi Fan
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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33
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Joseph P, Tabeling P. Direct measurement of the apparent slip length. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2005; 71:035303. [PMID: 15903486 DOI: 10.1103/physreve.71.035303] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2004] [Indexed: 05/02/2023]
Abstract
We measure velocity profiles in water flowing through thin microchannels, using particle image velocimetry combined with a nanopositioning system. From the velocity profiles, we determine the slip lengths in two cases: Smooth hydrophilic glass surfaces, and smooth hydrophobic glass surfaces, grafted with a monolayer of silane. The slip length is determined within (+/-100 nm) , i.e., five times more accurately than previous work. In all cases, we find that the slip length is below 100 nm.
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Affiliation(s)
- Pierre Joseph
- Laboratoire MMN, UMR CNRS-ESPCI 7083, 10 rue Vauquelin, F-75231 Paris Cedex 05, France.
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34
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Cottin-Bizonne C, Cross B, Steinberger A, Charlaix E. Boundary slip on smooth hydrophobic surfaces: intrinsic effects and possible artifacts. PHYSICAL REVIEW LETTERS 2005; 94:056102. [PMID: 15783663 DOI: 10.1103/physrevlett.94.056102] [Citation(s) in RCA: 201] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2004] [Indexed: 05/22/2023]
Abstract
We report an accurate determination of the hydrodynamic boundary condition of simple liquids flowing on smooth hydrophobic surfaces using a dynamic surface force apparatus equipped with two independent subnanometer resolution sensors. The boundary slip observed is well defined and does not depend on the scale of investigation from one to several hundreds of nanometers, nor on shear rate up to 5 x 10(3)s(-1). The slip length of 20 nm is in good agreement with theory and numerical simulations concerning smooth nonwetting surfaces. These results disagree with previous data in the literature reporting very high boundary slip on similar systems. We discuss possible origins of large slip length on smooth hydrophobic surfaces due to their contamination by hydrophobic particles.
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Affiliation(s)
- C Cottin-Bizonne
- Laboratoire de Physique de la Matière Condensée et Nanostructures, Université Claude Bernard, 6 rue Ampère, 69622 Villeurbanne CEDEX, France
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35
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Lauga E. Apparent slip due to the motion of suspended particles in flows of electrolyte solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:8924-8930. [PMID: 15379528 DOI: 10.1021/la049464r] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We consider pressure-driven flows of electrolyte solutions in small channels or capillaries in which tracer particles are used to probe velocity profiles. Under the assumption that the double layer is thin compared to the channel dimensions, we show that the flow-induced streaming electric field can create an apparent slip velocity for the motion of the particles, even if the flow velocity still satisfies the no-slip boundary condition. In this case, tracking of the particles would lead to the wrong conclusion that the no-slip boundary condition is violated. We evaluate the apparent slip length, compare it with experiments, and discuss the implications of these results.
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Affiliation(s)
- Eric Lauga
- Division of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, USA
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36
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Andrienko D, Dünweg B, Vinogradova OI. Boundary slip as a result of a prewetting transition. J Chem Phys 2003. [DOI: 10.1063/1.1627751] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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