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Eriksson M, Claesson PM, Järn M, Wallqvist V, Tuominen M, Kappl M, Teisala H, Vollmer D, Schoelkopf J, Gane PAC, Mäkelä JM, Swerin A. Effects of liquid surface tension on gas capillaries and capillary forces at superamphiphobic surfaces. Sci Rep 2023; 13:6794. [PMID: 37100810 PMCID: PMC10133270 DOI: 10.1038/s41598-023-33875-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 04/20/2023] [Indexed: 04/28/2023] Open
Abstract
The formation of a bridging gas capillary between superhydrophobic surfaces in water gives rise to strongly attractive interactions ranging up to several micrometers on separation. However, most liquids used in materials research are oil-based or contain surfactants. Superamphiphobic surfaces repel both water and low-surface-tension liquids. To control the interactions between a superamphiphobic surface and a particle, it needs to be resolved whether and how gas capillaries form in non-polar and low-surface-tension liquids. Such insight will aid advanced functional materials development. Here, we combine laser scanning confocal imaging and colloidal probe atomic force microscopy to elucidate the interaction between a superamphiphobic surface and a hydrophobic microparticle in three liquids with different surface tensions: water (73 mN m-1), ethylene glycol (48 mN m-1) and hexadecane (27 mN m-1). We show that bridging gas capillaries are formed in all three liquids. Force-distance curves between the superamphiphobic surface and the particle reveal strong attractive interactions, where the range and magnitude decrease with liquid surface tension. Comparison of free energy calculations based on the capillary menisci shapes and the force measurements suggest that under our dynamic measurements the gas pressure in the capillary is slightly below ambient.
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Affiliation(s)
- Mimmi Eriksson
- RISE Research Institutes of Sweden, 11486, Stockholm, Sweden
- Division of Surface and Corrosion Science, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Per M Claesson
- Division of Surface and Corrosion Science, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Mikael Järn
- RISE Research Institutes of Sweden, 11486, Stockholm, Sweden
| | | | - Mikko Tuominen
- RISE Research Institutes of Sweden, 11486, Stockholm, Sweden
| | - Michael Kappl
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, 55128, Mainz, Germany
| | - Hannu Teisala
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, 55128, Mainz, Germany
| | - Doris Vollmer
- Department of Physics at Interfaces, Max Planck Institute for Polymer Research, 55128, Mainz, Germany
| | | | - Patrick A C Gane
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, 00076, Aalto, Finland
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia
| | - Jyrki M Mäkelä
- Physics Unit, Aerosol Physics Laboratory, Tampere University, 33014, Tampere, Finland
| | - Agne Swerin
- Division of Surface and Corrosion Science, Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044, Stockholm, Sweden.
- Department of Engineering and Chemical Sciences, Karlstad University, 65188, Karlstad, Sweden.
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2
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McNamee CE, Kanno K. Use of Silica Nanoparticle Langmuir Films to Determine the Effect of Surface Roughness on the Change in the Forces between Two Silica Surfaces by a Liquid Flow. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:3450-3461. [PMID: 36825771 DOI: 10.1021/acs.langmuir.2c03424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We aimed to determine how surface roughness changes the effect of a liquid flow on the forces between two charged surfaces. This is because many applications require liquid to flow through charged confined areas and because all surfaces show a degree of roughness. We prepared films of different roughness by making mixed Langmuir films of silica nanoparticles (NPs) of two different diameters at air-100 mM NaCl aqueous interfaces and then by transferring and sintering these films to silicon wafers. Atomic force microscope (AFM) imaging showed that the film roughness decreased (1) with an NP diameter decrease and (2) an increased ratio of small NPs in a mixed film of small and larger NPs. This decrease was explained by a decreased NP aggregation in the film, due to the increased Brownian velocity that accompanies an NP diameter decrease. Force-separation curves were next measured with an AFM between a microsized silica particle (probe) and a smooth substrate (silicon wafer) or the rough NP films in 1 mM NaCl. In the absence of a liquid flow, the repulsive forces decreased with an increased substrate roughness. This reduction was explained by an increased difference between the real zero separation distance and apparent zero separation distance (the distance between the first point of mechanical contact between the probe and substrate) with an increased surface roughness. In the presence of a liquid flow, the repulsive forces decreased in the case of a smooth substrate. However, the repulsive forces were reduced less by a liquid flow for rough substrates. This result was explained by the difference in the effect of liquid flow on the diffuse layer for the smooth and rough surfaces. Surface roughness is postulated to modify the liquid flow trajectory near the surfaces and to cause ion concentration gradients near the surface. These factors are proposed to lessen the change in the diffuse layer brought about by a liquid flow. This would then reduce the change in the forces.
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Affiliation(s)
- Cathy E McNamee
- Shinshu University, Tokida 3-15-1, Ueda-shi, Nagano-ken 386-8567, Japan
| | - Koutarou Kanno
- Shinshu University, Tokida 3-15-1, Ueda-shi, Nagano-ken 386-8567, Japan
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3
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Monti D, Hubas C, Lourenço X, Begarin F, Haouisée A, Romana L, Lefrançois E, Jestin A, Budzinski H, Tapie N, Risser T, Mansot JL, Keith P, Gros O, Lopez PJ, Lauga B. Physical properties of epilithic river biofilm as a new lead to perform pollution bioassessments in overseas territories. Sci Rep 2020; 10:17309. [PMID: 33057038 PMCID: PMC7560750 DOI: 10.1038/s41598-020-73948-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 08/30/2020] [Indexed: 11/10/2022] Open
Abstract
Chlordecone (CLD) levels measured in the rivers of the French West Indies were among the highest values detected worldwide in freshwater ecosystems, and its contamination is recognised as a severe health, environmental, agricultural, economic, and social issue. In these tropical volcanic islands, rivers show strong originalities as simplified food webs, or numerous amphidromous migrating species, making the bioindication of contaminations a difficult issue. The objective of this study was to search for biological responses to CLD pollution in a spatially fixed and long-lasting component of the rivers in the West Indies: the epilithic biofilm. Physical properties were investigated through complementary analyses: friction, viscosity as well as surface adhesion were analyzed and coupled with measures of biofilm carbon content and exopolymeric substance (EPS) production. Our results have pointed out a mesoscale chemical and physical reactivity of the biofilm that can be correlated with CLD contamination. We were able to demonstrate that epilithic biofilm physical properties can effectively be used to infer freshwater environmental quality of French Antilles rivers. The friction coefficient is reactive to contamination and well correlated to carbon content and EPS production. Monitoring biofilm physical properties could offer many advantages to potential users in terms of effectiveness and ease of use, rather than more complex or time-consuming analyses.
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Affiliation(s)
- Dominique Monti
- UMR BOREA, UA-MNHN-SU-IRD-CNRS-UCN, Université des Antilles, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France.
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Université Des Antilles, MNHN, CNRS, SU, EPHE, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France.
| | - Cedric Hubas
- Muséum National D'Histoire Naturelle, UMR BOREA, MNHN-SU-IRD-CNRS-UCN-UA, Place de la croix, Station Marine de Concarneau, Concarneau, France
| | - Xavier Lourenço
- UMR BOREA, UA-MNHN-SU-IRD-CNRS-UCN, Université des Antilles, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
| | - Farid Begarin
- C3MAG, UFR Des Sciences Exactes Et Naturelles, Université Des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe, France
| | - Alexandre Haouisée
- UMR BOREA, UA-MNHN-SU-IRD-CNRS-UCN, Université des Antilles, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
| | - Laurence Romana
- GTSI, département de Physique, Université des Antilles, BP 592, 97159, Pointe-à-Pitre Cedex, Guadeloupe, France
| | | | - Alexandra Jestin
- UPR 103 HORTSYS - CIRAD - Fonctionnement agroécologique Et Performances Des systèmes de Cultures Horticoles, Campus Agro-Environnemental Caraïbe, 97285, Le Lamentin, Martinique, France
| | - Hélène Budzinski
- UMR CNRS 5805 EPOC - OASU, Équipe LPTC, Université de Bordeaux, 351 Cours de la libération, 33405, Talence Cedex, France
| | - Nathalie Tapie
- UMR CNRS 5805 EPOC - OASU, Équipe LPTC, Université de Bordeaux, 351 Cours de la libération, 33405, Talence Cedex, France
| | - Théo Risser
- E2S UPPA, CNRS, IPREM, Universite de Pau Et Des Pays de L'Adour, BP 1155, 64013, Pau Cedex, France
| | - Jean-Louis Mansot
- C3MAG, UFR Des Sciences Exactes Et Naturelles, Université Des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe, France
- GTSI, département de Physique, Université des Antilles, BP 592, 97159, Pointe-à-Pitre Cedex, Guadeloupe, France
| | - Philippe Keith
- Muséum National D'Histoire Naturelle, UMR BOREA, MNHN-SU-IRD-CNRS-UCN-UA, 57 rue Cuvier, CP26, 75231, Paris Cedex 05, France
| | - Olivier Gros
- C3MAG, UFR Des Sciences Exactes Et Naturelles, Université Des Antilles, BP 592, 97159, Pointe-à-Pitre, Guadeloupe, France
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Université Des Antilles, MNHN, CNRS, SU, EPHE, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
| | - Pascal-Jean Lopez
- Muséum National D'Histoire Naturelle, UMR BOREA, MNHN-SU-IRD-CNRS-UCN-UA, 57 rue Cuvier, CP26, 75231, Paris Cedex 05, France
| | - Béatrice Lauga
- E2S UPPA, CNRS, IPREM, Universite de Pau Et Des Pays de L'Adour, BP 1155, 64013, Pau Cedex, France
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Lan W, Niu Y, Sheng M, Lu Z, Yuan Y, Zhang Y, Zhou Y, Xu Q. Biomimicry Surface-Coated Proppant with Self-Suspending and Targeted Adsorption Ability. ACS OMEGA 2020; 5:25824-25831. [PMID: 33073107 PMCID: PMC7557943 DOI: 10.1021/acsomega.0c03138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
Proppant is a key material, which can increase the production of unconventional petroleum and gas. Excellent proppants with a long migration distance are required in the fracture network. Resin-coated proppants have been confirmed as a good choice because of the long migration and the self-suspending ability in fracturing fluids. However, the distribution of the resin-coated proppants in fracture networks is random. The design of proppants with targeted adsorption is urgently needed. In this study, a novel proppant coated with a phenolic resin shell doped with Fe3O4 nanoparticles on ceramic (coated proppant) was designed and investigated. Based on the results, the coated proppant was adsorbed on the magnetic component's parts of the fracture network surface, which helps in enhancing the uniform distribution of the proppant in the fracture rock cracks. Meanwhile, the self-suspending ability of the coated proppant is five times higher than that of the uncoated proppant and can migrate a longer distance in the fracture network. Moreover, the liquid conductivity of the coated proppant is 30% higher than that of the uncoated ones at a closure pressure of 6.9 MPa. In summary, new insights into the design of functional proppants and further guidelines on the production of unconventional petroleum and gas have been provided in this study.
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Affiliation(s)
- Wenjie Lan
- State
Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of
Biogas Upgrading Utilization, Harvard SEAS-CUPB Joint Laboratory on
Petroleum Science, China University of Petroleum
(Beijing), Beijing 102249, China
| | - Yingchun Niu
- State
Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of
Biogas Upgrading Utilization, Harvard SEAS-CUPB Joint Laboratory on
Petroleum Science, China University of Petroleum
(Beijing), Beijing 102249, China
| | - Mao Sheng
- State
Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of
Biogas Upgrading Utilization, Harvard SEAS-CUPB Joint Laboratory on
Petroleum Science, China University of Petroleum
(Beijing), Beijing 102249, China
| | - Zhaohui Lu
- National
Joint Engineering Research Center for Shale Gas Exploration and Development, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China
| | - Yong Yuan
- National
Joint Engineering Research Center for Shale Gas Exploration and Development, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China
| | - Ye Zhang
- National
Joint Engineering Research Center for Shale Gas Exploration and Development, Chongqing Institute of Geology and Mineral Resources, Chongqing 401120, China
| | - Yang Zhou
- State
Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of
Biogas Upgrading Utilization, Harvard SEAS-CUPB Joint Laboratory on
Petroleum Science, China University of Petroleum
(Beijing), Beijing 102249, China
| | - Quan Xu
- State
Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of
Biogas Upgrading Utilization, Harvard SEAS-CUPB Joint Laboratory on
Petroleum Science, China University of Petroleum
(Beijing), Beijing 102249, China
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5
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Multiscale characterisation of single synthetic fibres: Surface morphology and nanomechanical properties. J Colloid Interface Sci 2020; 571:398-411. [PMID: 32247192 DOI: 10.1016/j.jcis.2020.03.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/11/2020] [Accepted: 03/13/2020] [Indexed: 11/23/2022]
Abstract
HYPOTHESIS Thermal through-air bonding process and slip additive treatment affect fibre surface structure and nanomechanical properties, which is extremely difficult to characterise on a single-fibre level. EXPERIMENTS Optical microscopy (OM) was applied to study the effect of air-through bonding, spunbonding, and crimping on fibre geometry and general appearance. A "spray-on" method developed here using a custom-designed fibre holder allowed a direct measurement of static contact angles of water droplets on single fibres. Scanning electron microscopy (SEM) showed different morphological features on the fibre due to the nonwoven fabric-making process and additive treatment. Synchrotron X-ray diffraction (XRD) was applied to study the effect of erucamide presence on polypropylene (PP) fibre crystal structure. Atomic force microscopy (AFM) imaging provided complementary characterization of fibre topographic features such as average surface roughness, along with adhesion force mapping by quantitative nanomechanical (QNM) AFM imaging. FINDINGS Our results show the effect of nonwoven making process and surfactant additive treatment on the fibre surface structure and nanomechanical properties. Wettability experiment on the single fibre revealed the hydrophobic nature of all the synthetic fibres. For polyethylene/polyethylene terephthalate (PE/PET) bicomponent single fibres, the polyethylene sheath was found to possess fibrillar microstructure - typical for drawn fibres, whereas the fibres entangled in nonwoven fabrics exhibited a uniform, porous surface morphology attributed to the through-air process. Adhesion force mapping allowed us to correlate fibre nanomechanical properties with its topography, with surface pore interiors showing higher adhesion than the flat polyethylene region. Furthermore, on the polypropylene (PP) fibre surface treated with erucamide (13-cis-docosenamide; a common slip additive used in polyolefin film processing), we observed overlapping multilayers consisting of 4 nm erucamide bilayers, attributed to the slip additive migration onto the fibre surface. XRD measurements of the fibres did not detect the presence of erucamide; however, AFM imaging provided evidence for its migration to the fibre surface, imparting influence on the surface structure and adhesive properties of the fibre. Single-fibre AFM imaging also allowed a detailed analysis of different surface roughness parameters, revealing that both through-air bonding in the nonwoven making process and the slip additive (erucamide) treatment affected the fibre surface roughness. The wettability, surface morphology, and adhesion properties from this study, obtained with unprecedented resolution and details on single fibres, are valuable to informing rational design of fibre processing for fibre optimal properties, critically important in many industrial applications.
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6
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Lin W, Klein J. Control of surface forces through hydrated boundary layers. Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.10.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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7
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Rosenhek-Goldian I, Kampf N, Klein J. Trapped Aqueous Films Lubricate Highly Hydrophobic Surfaces. ACS NANO 2018; 12:10075-10083. [PMID: 30252440 DOI: 10.1021/acsnano.8b04735] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Friction at hydrophobic surfaces in aqueous media is ubiquitous ( e.g., prosthetic implants, contact lenses, microfluidic devices, biological tissue) but is not well understood. Here, we measure directly, using a surface force balance, both normal stresses and sliding friction in an aqueous environment between a hydrophilic surface (single-crystal mica) and the stable, molecularly smooth, highly hydrophobic surface of a spin-cast fluoropolymer film. Normal force versus surface separation profiles indicate a high negative charge density at the water-immersed fluoropolymer surface, consistent with previous studies. Sliding of the compressed surfaces under water or in physiological-level salt solution (0.1 M NaCl) reveals strikingly low boundary friction (friction coefficient μ ≈ 0.003-0.009) up to contact pressures of at least 50 atm. This is attributed largely to hydrated counterions (protons and Na+ ions) trapped in thin interfacial films between the compressed, sliding surfaces. Our results reveal how frictional dissipation may occur at hydrophobic surfaces in water and how modification of such surfaces may suppress this dissipation.
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Affiliation(s)
- Irit Rosenhek-Goldian
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Nir Kampf
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
| | - Jacob Klein
- Department of Materials and Interfaces , Weizmann Institute of Science , Rehovot 76100 , Israel
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8
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Bartenstein JE, Liu X, Lange K, Claesson PM, Briscoe WH. Polymersomes at the solid-liquid interface: Dynamic morphological transformation and lubrication. J Colloid Interface Sci 2017; 512:260-271. [PMID: 29073467 DOI: 10.1016/j.jcis.2017.10.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/13/2017] [Accepted: 10/16/2017] [Indexed: 10/18/2022]
Abstract
Polymersomes are hollow spheres self-assembled from amphiphilic block copolymers of certain molecular architecture. Whilst they have been widely studied for biomedical applications, relatively few studies have reported their interfacial properties. In particular, lubrication by polymersomes has not been previously reported. Here, interfacial properties of polymersomes self-assembled from poly(butadiene)-poly(ethylene oxide) (PBD-PEO; molecular weight 10,400 g mol-1) have been studied at both hydrophilic and hydrophobic surfaces. Their morphology at silica and mica surfaces was imaged with quantitative nanomechanical property mapping atomic force microscopy (QNM AFM), and friction and surface forces they mediate under confinement between two surfaces were studied using colloidal probe AFM (CP-AFM). We find that the polymersomes remained intact but adopted flattened conformation once adsorbed to mica, with a relatively low coverage. However, on silica these polymersomes were unstable, rupturing to form donut shaped residues or patchy bilayers. On a silica surface hydrophobized with a 19 nm polystyrene (PS) film, the polymer vesicles formed a more stable layer with a higher surface coverage as compared to the hydrophilic surface, and the interfacial structure also evolved over time. Moreover, friction was greatly reduced on hydrophobized silica surfaces in the presence of polymersomes, suggesting their potential as effective aqueous lubricants.
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Affiliation(s)
- Julia E Bartenstein
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
| | - Xiaoyan Liu
- Surface and Corrosion Science, Drottning Kristinas Väg 51, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Kathrin Lange
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
| | - Per M Claesson
- Surface and Corrosion Science, Drottning Kristinas Väg 51, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Wuge H Briscoe
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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9
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Tripathy A, Sen P, Su B, Briscoe WH. Natural and bioinspired nanostructured bactericidal surfaces. Adv Colloid Interface Sci 2017; 248:85-104. [PMID: 28780961 PMCID: PMC6643001 DOI: 10.1016/j.cis.2017.07.030] [Citation(s) in RCA: 257] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 07/25/2017] [Accepted: 07/25/2017] [Indexed: 01/22/2023]
Abstract
Bacterial antibiotic resistance is becoming more widespread due to excessive use of antibiotics in healthcare and agriculture. At the same time the development of new antibiotics has effectively ground to a hold. Chemical modifications of material surfaces have poor long-term performance in preventing bacterial build-up and hence approaches for realising bactericidal action through physical surface topography have become increasingly important in recent years. The complex nature of the bacteria cell wall interactions with nanostructured surfaces represents many challenges while the design of nanostructured bactericidal surfaces is considered. Here we present a brief overview of the bactericidal behaviour of naturally occurring and bio-inspired nanostructured surfaces against different bacteria through the physico-mechanical rupture of the cell wall. Many parameters affect this process including the size, shape, density, rigidity/flexibility and surface chemistry of the surface nanotextures as well as factors such as bacteria specificity (e.g. gram positive and gram negative) and motility. Different fabrication methods for such bactericidal nanostructured surfaces are summarised.
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Affiliation(s)
- Abinash Tripathy
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK; Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Prosenjit Sen
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Bo Su
- School of Oral and Dental Sciences, University of Bristol, Bristol BS1 2LY, UK
| | - Wuge H Briscoe
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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10
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Briscoe WH. Aqueous boundary lubrication: Molecular mechanisms, design strategy, and terra incognita. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2016.09.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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11
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Liu X, Yun SH, Claesson PM. Frictional behavior of micro-patterned silicon surface. J Colloid Interface Sci 2015; 456:76-84. [DOI: 10.1016/j.jcis.2015.06.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 06/04/2015] [Accepted: 06/04/2015] [Indexed: 11/24/2022]
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12
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Zekonyte J, Polcar T. Friction Force Microscopy Analysis of Self-Adaptive W-S-C Coatings: Nanoscale Friction and Wear. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21056-21064. [PMID: 26340161 DOI: 10.1021/acsami.5b05546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Transition metal dichalcogenides (TMD) are increasingly popular due to unique structural and mechanical properties. They belong, together with graphene and similar 2D materials, to a small family of solid lubricants with potential to produce ultralow friction state. At the macroscale, low friction stems from the ability to form well-oriented films on the sliding surface (typically up to 10 nm thick), with the TMD basal planes aligned parallel to the surface. In this study, we quantitatively evaluate tribological properties of three sputtered tungsten-sulfur-carbon (W-S-C) coatings at a nanoscale using friction force microscopy. In particular, we investigate possible formation of well-ordered tungsten disulfide (WS2) layers on the coating surface. The coefficient of friction decreased with increasing load independently of coating composition or mechanical properties. In contrast, hard coatings with high tungsten carbide content were more resistant to wear. We successfully identified a WS2 tribolayer at the sliding interface, which peeled off as ultrathin flakes and attached to AFM tip. Nanoscale tribological behavior of WSC coatings replicates deviation of Amonton's law observed in macroscale testing and strongly suggests that the tribolayer is formed almost immediately after the start of sliding.
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Affiliation(s)
- Jurgita Zekonyte
- School of Engineering, University of Portsmouth , Anglesea Building, Anglesea Road, Portsmouth PO1 3DJ, United Kingdom
| | - Tomas Polcar
- National Centre for Advanced Tribology (nCATS), Faculty of Engineering and Environment, University of Southampton , Southampton SO17 1BJ, United Kingdom
- Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague , Technicka 2, Prague 166 27, Czech Republic
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13
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An J, Dėdinaitė A, Nilsson A, Holgersson J, Claesson PM. Comparison of a Brush-with-Anchor and a Train-of-Brushes Mucin on Poly(methyl methacrylate) Surfaces: Adsorption, Surface Forces, and Friction. Biomacromolecules 2014; 15:1515-25. [DOI: 10.1021/bm500173s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junxue An
- School
of Chemical Science and Engineering, Department of Chemistry, Division
of Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden
| | - Andra Dėdinaitė
- School
of Chemical Science and Engineering, Department of Chemistry, Division
of Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden
- Chemistry,
Materials and Surfaces, SP Technical Research Institute of Sweden, P. O. Box 5607, SE-114 86 Stockholm, Sweden
| | - Anki Nilsson
- Recopharma
AB, Arvid Wallgrens backe 20, 413 46 Gothenburg, Sweden
| | - Jan Holgersson
- Department
of Clinical Chemistry and Transfusion Medicine, The Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, Vita stråket
13, SE-413 45 Gothenburg, Sweden
| | - Per M. Claesson
- School
of Chemical Science and Engineering, Department of Chemistry, Division
of Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden
- Chemistry,
Materials and Surfaces, SP Technical Research Institute of Sweden, P. O. Box 5607, SE-114 86 Stockholm, Sweden
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14
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Tabor RF, Grieser F, Dagastine RR, Chan DYC. The hydrophobic force: measurements and methods. Phys Chem Chem Phys 2014; 16:18065-75. [DOI: 10.1039/c4cp01410c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The hydrophobic force describes the attraction between water-hating molecules (and surfaces) that draws them together, causing aggregation, phase separation, protein folding and many other inherent physical phenomena.
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Affiliation(s)
- Rico F. Tabor
- School of Chemistry
- Monash University
- Clayton, Australia
| | - Franz Grieser
- Particulate Fluids Processing Centre
- The University of Melbourne
- Parkville 3010, Australia
- School of Chemistry
- The University of Melbourne
| | - Raymond R. Dagastine
- Particulate Fluids Processing Centre
- The University of Melbourne
- Parkville 3010, Australia
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
| | - Derek Y. C. Chan
- Particulate Fluids Processing Centre
- The University of Melbourne
- Parkville 3010, Australia
- Department of Mathematics and Statistics
- The University of Melbourne
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