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Ye Q, He B, Zhang Y, Zhang J, Liu S, Zhou F. Grafting Robust Thick Zwitterionic Polymer Brushes via Subsurface-Initiated Ring-Opening Metathesis Polymerization for Antimicrobial and Anti-Biofouling. ACS APPLIED MATERIALS & INTERFACES 2019; 11:39171-39178. [PMID: 31559815 DOI: 10.1021/acsami.9b11946] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In the present work, high-thickness zwitterionic polymer brushes based on imidazolium salts were successfully grafted via a novel subsurface-initiated ring-opening metathesis polymerization (subsurface-initiated ROMP) from polydimethylsiloxane (PDMS), and their antifouling performance was evaluated in detail. First, an initiator-embedded PDMS was prepared via copolymerization of PDMS prepolymer and ROMP initiator, and then zwitterionic polymer brushes were grafted via subsurface-initiated ROMP from surface to subsurface of the PDMS due to the implanted ROMP initiator. Results from a series of characterization methods such as infrared spectroscopy, X-ray photoelectron spectroscopy, contact angle, and atomic force microscopy proved the zwitterionic polymer brushes' successful grafting. The grafting thickness of zwitterionic polymer brushes via subsurface-initiated ROMP can reach the micron scale, and the as-prepared zwitterionic polymer based surfaces showed good lubricating properties compared to traditional surface-initiated ROMP, which hints that polymer brushes can be grafted not only on the surface but also on the subsurface of PDMS. The protein adhesion test and biofouling assay of zwitterionic polymer brushes were tested in the laboratory, and the results indicated that the zwitterionic polymer-functionalized PDMS can effectively resist the adhesion of bovine serum albumin and algae (Porphyridium and Dunaliella) and has good anti-bacterial activity against both Escherichia coli and Staphylococcus aureus.
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Affiliation(s)
- Qian Ye
- State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering , Northwestern Polytechnical University , No. 127, Youyi West Road , Xi'an 710072 , P. R. China
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen , Shenzhen 518057 , P. R. China
| | - Baoluo He
- State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering , Northwestern Polytechnical University , No. 127, Youyi West Road , Xi'an 710072 , P. R. China
| | - Yun Zhang
- The Fourth Hospital of Xi'an , Xi'an Jiaotong University , No. 21, Jiefang Road , Xi'an 710004 , P. R. China
| | - Jin Zhang
- State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering , Northwestern Polytechnical University , No. 127, Youyi West Road , Xi'an 710072 , P. R. China
| | - Shujuan Liu
- State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering , Northwestern Polytechnical University , No. 127, Youyi West Road , Xi'an 710072 , P. R. China
| | - Feng Zhou
- State Key Laboratory of Solidification Processing, Center of Advanced Lubrication and Seal Materials, School of Materials Science and Engineering , Northwestern Polytechnical University , No. 127, Youyi West Road , Xi'an 710072 , P. R. China
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , No. 18, Tianshui Middle Road , Lanzhou 730000 , P. R. China
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Qin G, Yam CM, Kumar A, Lopez-Romero JM, Li S, Huynh T, Li Y, Yang B, Contreras-Caceres R, Cai C. Preparation, characterization, and protein-resistance of films derived from a series of α-oligo(ethylene glycol)-ω-alkenes on H–Si(111) surfaces. RSC Adv 2017. [DOI: 10.1039/c6ra28497c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Films on Si(111) were prepared by photo-activated grafting of CH2CH(CH2)m(OCH2CH2)nOCH3 (m = 8, 9; n = 3–7) by using different vacuum conditions. High vacuum produced a higher thickness (40 Å) and <0.8% fibrinogen adsorption (C10EG7). Films were stable even after 28 days.
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Affiliation(s)
- Guoting Qin
- College of Optometry
- University of Houston
- Houston
- USA
| | - Chi Ming Yam
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
| | - Amit Kumar
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
| | - J. Manuel Lopez-Romero
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Málaga
- 29071 Málaga
- Spain
| | - Sha Li
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
| | - Toan Huynh
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
| | - Yan Li
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
| | - Bin Yang
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
| | | | - Chengzhi Cai
- Department of Chemistry & Center for Materials Chemistry
- University of Houston
- Houston
- USA
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3
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Lis D, Cecchet F. Unique Vibrational Features as a Direct Probe of Specific Antigen-Antibody Recognition at the Surface of a Solid-Supported Hybrid Lipid Bilayer. Chemphyschem 2016; 17:2645-9. [PMID: 27324112 DOI: 10.1002/cphc.201600419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Indexed: 11/09/2022]
Abstract
Here, we demonstrate how sum frequency generation (SFG), a vibrational spectroscopy based on a nonlinear three-photon mixing process, may provide a direct and unique fingerprint of bio-recognition; This latter can be detected with an intrinsically discriminating unspecific adsorption, thanks to the high sensitivity of the second-order nonlinear optical (NLO) response to preferential molecular orientation and symmetry properties. As a proof of concept, we have detected the biological event at the solid/liquid interface of a model bio-active antigen platform, based on a solid-supported hybrid lipid bilayer (ss-HLB) of a 2,4-dinitrophenyl (DNP) lipid, towards a monoclonal mouse anti-DNP complementary antibody.
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Affiliation(s)
- Dan Lis
- Research Centre in Physics of Matter and Radiation (PMR), Namur Research Institute for LIfe Sciences (NARILIS), University of Namur (UNamur), 61 rue de Bruxelles, 5000, Namur, Belgium
| | - Francesca Cecchet
- Research Centre in Physics of Matter and Radiation (PMR), Namur Research Institute for LIfe Sciences (NARILIS), University of Namur (UNamur), 61 rue de Bruxelles, 5000, Namur, Belgium.
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4
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Lee AWH, Gates BD. Rapid Covalent Modification of Silicon Oxide Surfaces through Microwave-Assisted Reactions with Alcohols. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7284-7293. [PMID: 27396288 DOI: 10.1021/acs.langmuir.6b00662] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We demonstrate the method of a rapid covalent modification of silicon oxide surfaces with alcohol-containing compounds with assistance by microwave reactions. Alcohol-containing compounds are prevalent reagents in the laboratory, which are also relatively easy to handle because of their stability against exposure to atmospheric moisture. The condensation of these alcohols with the surfaces of silicon oxides is often hindered by slow reaction kinetics. Microwave radiation effectively accelerates this condensation reaction by heating the substrates and/or solvents. A variety of substrates were modified in this demonstration, such as silicon oxide films of various thicknesses, glass substrates such as microscope slides (soda lime), and quartz. The monolayers prepared through this strategy demonstrated the successful formation of covalent surface modifications of silicon oxides with water contact angles of up to 110° and typical hysteresis values of 2° or less. An evaluation of the hydrolytic stability of these monolayers demonstrated their excellent stability under acidic conditions. The techniques introduced in this article were successfully applied to tune the surface chemistry of silicon oxides to achieve hydrophobic, oleophobic, and/or charged surfaces.
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Affiliation(s)
- Austin W H Lee
- Department of Chemistry, Simon Fraser University , 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Byron D Gates
- Department of Chemistry, Simon Fraser University , 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
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5
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Yoon HJ, Shanker A, Wang Y, Kozminsky M, Jin Q, Palanisamy N, Burness ML, Azizi E, Simeone DM, Wicha MS, Kim DM, Nagrath S. Tunable Thermal-Sensitive Polymer-Graphene Oxide Composite for Efficient Capture and Release of Viable Circulating Tumor Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:4891-7. [PMID: 27115557 PMCID: PMC5680542 DOI: 10.1002/adma.201600658] [Citation(s) in RCA: 103] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 02/29/2016] [Indexed: 05/20/2023]
Abstract
A highly sensitive microfluidic system to capture circulating tumor cells from whole blood of cancer patients is presented. The device incorporates graphene oxide into a thermoresponsive polymer film to serve as the first step of an antibody functionalization chemistry. By decreasing the temperature, captured cells may be released for subsequent analysis.
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Affiliation(s)
- Hyeun Joong Yoon
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Department of Electrical Engineering and Computer Science, South Dakota State University Brookings, SD 57007, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Translational Oncology Program, University of Michigan Health System, 1600 Huron Pkwy, Ann Arbor, MI 48109, USA
| | - Apoorv Shanker
- Macromolecular Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
| | - Yang Wang
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Translational Oncology Program, University of Michigan Health System, 1600 Huron Pkwy, Ann Arbor, MI 48109, USA
| | - Molly Kozminsky
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Translational Oncology Program, University of Michigan Health System, 1600 Huron Pkwy, Ann Arbor, MI 48109, USA
| | - Qu Jin
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
| | | | - Monika L. Burness
- Department of Internal Medicine, University of Michigan Comprehensive Cancer Center, 1500 E. Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Ebrahim Azizi
- Department of Internal Medicine, University of Michigan Comprehensive Cancer Center, 1500 E. Medical Center Drive, Ann Arbor, MI 48109, USA
| | - Diane M. Simeone
- Department of Internal Medicine, University of Michigan Comprehensive Cancer Center, 1500 E. Medical Center Drive, Ann Arbor, MI 48109, USA
- Translational Oncology Program, University of Michigan Health System, 1600 Huron Pkwy, Ann Arbor, MI 48109, USA
| | - Max S. Wicha
- Department of Internal Medicine, University of Michigan Comprehensive Cancer Center, 1500 E. Medical Center Drive, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Translational Oncology Program, University of Michigan Health System, 1600 Huron Pkwy, Ann Arbor, MI 48109, USA
| | - Diane M. Kim
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Macromolecular Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Department of Material Science and Engineering, Department of Biomedical Engineering, Department of Chemistry, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
| | - Sunitha Nagrath
- Department of Chemical Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, MI 48109, USA
- Biointerfaces Institute, University of Michigan, 2800 Plymouth Road, Ann Arbor, MI 48109, USA
- Translational Oncology Program, University of Michigan Health System, 1600 Huron Pkwy, Ann Arbor, MI 48109, USA
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6
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Muijlwijk K, Berton-Carabin C, Schroën K. Cross-flow microfluidic emulsification from a food perspective. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.01.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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7
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Haraguchi K, Takehisa T, Mizuno T, Kubota K. Antithrombogenic Properties of Amphiphilic Block Copolymer Coatings: Evaluation of Hemocompatibility Using Whole Blood. ACS Biomater Sci Eng 2015; 1:352-362. [PMID: 33445240 DOI: 10.1021/acsbiomaterials.5b00079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Antithrombogenicity is one of the most critical properties required for materials used in biomedical devices, particularly in devices that contact blood. The antithrombogenicity of surfaces coated with amphiphilic block copolymers composed of hydrophobic poly(2-methoxyethyl acrylate) (M) and hydrophilic poly(N,N-dimethylacrylamide) (D) segments was investigated using plasma protein and whole blood with regard to protein adsorption, thrombus formation, platelet activation, and clotting kinetics. Three types of block copolymers and a random copolymer were synthesized using one-pot reversible addition-fragmentation chain-transfer (RAFT) polymerization under conditions of high yield and high molecular weight. Triblock and 4-arm block copolymers with MDM and (MD)4 architecture, respectively, showed good adhesion to both organic and inorganic substrates, including polyvinyl chloride (PVC) tubes, and the resulting coated surfaces showed superior protein repellency and hemocompatibility compared to the diblock or random copolymer coatings and noncoated control. In a Chandler-loop method with whole blood, PVC tubes coated with MDM and (MD)4 showed improved thromboresistance and adsorption resistance to blood-derived proteins. This high hemocompatibility was also confirmed with human whole blood by thrombelastography (suppression of blood-clotting behavior in both intrinsic and extrinsic coagulation pathways) and platelet function analyses (significant reductions in the aggregation activity of platelets under two types of stimulation). The antithrombogenicity has been discussed based on the structural analyses of the MDM-coated surface. The results of this study will enable the development of more effective biomedical and analytical devices with excellent antithrombogenic characteristics by using a simple and environmentally friendly approach.
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Affiliation(s)
- Kazutoshi Haraguchi
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, Sakura, Chiba 285-0078 Japan.,Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575 Japan
| | - Toru Takehisa
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, Sakura, Chiba 285-0078 Japan.,Central Research Laboratories, DIC Co., Sakura, Chiba 285-8668, Japan
| | - Toshihide Mizuno
- Department of Artificial Organs, Research Institute, National Cerebral and Cardiovascular Center, Suita, Osaka, 565-8565, Japan
| | - Kazuomi Kubota
- Material Chemistry Laboratory, Kawamura Institute of Chemical Research, Sakura, Chiba 285-0078 Japan.,Central Research Laboratories, DIC Co., Sakura, Chiba 285-8668, Japan
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8
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Abbott SB, de Vos WM, Mears LLE, Cattoz B, Skoda MWA, Barker R, Richardson RM, Prescott SW. Is Osmotic Pressure Relevant in the Mechanical Confinement of a Polymer Brush? Macromolecules 2015. [DOI: 10.1021/ma502246r] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Stephen B. Abbott
- H H Wills
Physics Laboratory, University of Bristol, Bristol BS8 1TL, U.K
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| | - Wiebe M. de Vos
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
- Membrane
Science and Technology, Mesa+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, Netherlands
| | - Laura L. E. Mears
- H H Wills
Physics Laboratory, University of Bristol, Bristol BS8 1TL, U.K
| | - Beatrice Cattoz
- H H Wills
Physics Laboratory, University of Bristol, Bristol BS8 1TL, U.K
| | | | - Robert Barker
- Institut Laue Langevin, 71 avenue des Martyrs, F-38042 Grenoble, France
| | | | - Stuart W. Prescott
- School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
- School of Chemical Engineering, UNSW Australia, UNSW, Sydney, NSW 2052, Australia
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9
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Schröter A, Franzka S, Hartmann N. Photothermal laser fabrication of micro- and nanostructured chemical templates for directed protein immobilization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14841-14848. [PMID: 25397891 DOI: 10.1021/la503814n] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Photothermal patterning of poly(ethylene glycol) terminated organic monolayers on surface-oxidized silicon substrates is carried out using a microfocused beam of a CW laser operated at a wavelength of 532 nm. Trichlorosilane and trimethoxysilane precursors are used for coating. Monolayers from trimethoxysilane precursors show negligible unspecific protein adsorption in the background, i.e., provide platforms of superior protein repellency. Laser patterning results in decomposition of the monolayers and yields chemical templates for directed immobilization of proteins at predefined positions. Characterization is carried out via complementary analytical methods including fluorescence microscopy, atomic force microscopy, and scanning electron microscopy. Appropriate labeling techniques (fluorescent markers and gold clusters) and substrates (native and thermally oxidized silicon substrates) are chosen in order to facilitate identification of protein adsorption and ensure high sensitivity and selectivity. Variation of the laser parameters at a 1/e(2) spot diameter of 2.8 μm allows for fabrication of protein binding domains with diameters on the micrometer and nanometer length scale. Minimum domain sizes are about 300 nm. In addition to unspecific protein adsorption on as-patterned monolayers, biotin-streptavidin coupling chemistry is exploited for specific protein binding. This approach represents a novel facile laser-based means for fabrication of protein micro- and nanopatterns. The routine is readily applicable to femtosecond laser processing of glass substrates for the fabrication of transparent templates.
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Affiliation(s)
- Anja Schröter
- Fakultät für Chemie, Universität Duisburg-Essen , 45117 Essen, Germany
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10
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Huang Q, Yoon I, Villanueva J, Kim K, Sirbuly DJ. Quantitative mechanical analysis of thin compressible polymer monolayers on oxide surfaces. SOFT MATTER 2014; 10:8001-8010. [PMID: 25157609 DOI: 10.1039/c4sm01530d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A clear understanding of the mechanical behavior of nanometer thick films on nanostructures, as well as developing versatile approaches to characterize their mechanical properties, are of great importance and may serve as the foundation for understanding and controlling molecular interactions at the interface of nanostructures. Here we report on the synthesis of thin, compressible polyethylene glycol (PEG) monolayers with a wet thickness of <20 nm on tin dioxide (SnO2) nanofibers through silane-based chemistries. Nanomechanical properties of such thin PEG films were extensively investigated using atomic force microscopy (AFM). In addition, tip-sample interactions were carefully studied, with different AFM tip modifications (i.e., hydrophilic and hydrophobic) and in different ionic solutions. We find that the steric forces dominate the tip-sample interactions when the polymer film is immersed in solution with salt concentrations similar to biological media (e.g., 1x phosphate buffer solution), while van der Waals and electrostatic forces have minimal contributions. A Dimitriadis thin film polymer compression model shows that the linear elastic regime is reproducible in the initial 50% indentation of these films which have tunable Young's moduli ranging from 5 MPa for the low molecular weight films to 700 kPa for the high molecular weight PEG films. Results are compared with the same PEG films deposited on silicon substrates which helped quantify the structural properties and understand the relationship between the structural and the mechanical properties of PEG films on the SnO2 fibers.
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Affiliation(s)
- Qian Huang
- Department of NanoEngineering, University of California, La Jolla, San Diego, CA 92093, USA.
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11
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Deschaume O, Magnin D, Cheng ZA, Douchamps C, Labbé P, Yunus S, Durrieu MC, Nysten B, Glinel K, Demoustier-Champagne S, Jonas AM. Comparison of the Density of Proteins and Peptides Grafted on Silane Layers and Polyelectrolyte Multilayers. Biomacromolecules 2014; 15:3706-16. [DOI: 10.1021/bm500996u] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olivier Deschaume
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Delphine Magnin
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Zhe A. Cheng
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Colette Douchamps
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Pierre Labbé
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Sami Yunus
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Marie-Christine Durrieu
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Bernard Nysten
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Karine Glinel
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Sophie Demoustier-Champagne
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Alain M. Jonas
- Bio and
Soft Matter, Institute
of Condensed Matter and Nanosciences, Université Catholique de Louvain, Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
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12
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Chen H, Zhang M, Yang J, Zhao C, Hu R, Chen Q, Chang Y, Zheng J. Synthesis and characterization of antifouling poly(N-acryloylaminoethoxyethanol) with ultralow protein adsorption and cell attachment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10398-10409. [PMID: 25127733 DOI: 10.1021/la502136q] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Rational design of effective antifouling polymers is challenging but important for many fundamental and applied applications. Herein we synthesize and characterize an N-acryloylaminoethoxyethanol (AAEE) monomer, which integrates three hydrophilic groups of hydroxyl, amide, and ethylene glycol in the same material. AAEE monomers were further grafted and polymerized on gold substrates to form polyAAEE brushes with well-controlled thickness via surface-initiated atomic transfer radical polymerization (SI-ATRP), with particular attention to a better understanding of the molecular structure-antifouling property relationship of hydroxyl-acrylic-based polymers. The surface hydrophilicity and antifouling properties of polyAAEE brushes as a function of film thickness are studied by combined experimental and computational methods including surface plasmon resonance (SPR) sensors, atomic force microscopy (AFM), cell adhesion assay, and molecular dynamics (MD) simulations. With the optimal polymer film thicknesses (∼10-40 nm), polyAAEE-grafted surfaces can effectively resist protein adsorption from single-protein solutions and undiluted human blood plasma and serum to a nonfouling level (i.e., <0.3 ng/cm(2)). The polyAAEE brushes also highly resist mammalian cell attachment up to 3 days. MD simulations confirm that the integration of three hydrophilic groups induce a stronger and closer hydration layer around polyAAEE, revealing a positive relationship between surface hydration and antifouling properties. The molecular structure-antifouling properties relationship of a series of hydroxyl-acrylic-based polymers is also discussed. This work hopefully provides a promising structural motif for the design of new effective antifouling materials beyond traditional ethylene glycol-based antifouling materials.
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Affiliation(s)
- Hong Chen
- Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States
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13
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Abdolahi A, Hamzah E, Ibrahim Z, Hashim S. Application of Environmentally-Friendly Coatings Toward Inhibiting the Microbially Influenced Corrosion (MIC) of Steel: A Review. POLYM REV 2014. [DOI: 10.1080/15583724.2014.946188] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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14
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Dirani A, Fernandes AE, Wong DR, Lipnik P, Poleunis C, Nysten B, Glinel K, Jonas AM. Layers over layer-by-layer assemblies: silanization of polyelectrolyte multilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10057-10065. [PMID: 25101979 DOI: 10.1021/la502729z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The functionalization of poly(allylamine hydrochloride)/poly(acrylic acid) (PAH/PAA) polyelectrolyte multilayers by silanes reacted from the gas phase is studied depending on reaction time and temperature, pH of multilayer assembly, and nature of the reacting silane group. Whereas monochlorosilanes only diffuse in the multilayer and graft in limited amount, trichloro- and triethoxysilanes form rapidly a continuous gel layer on the surface of the multilayer, with a thickness of ca. 10-20 nm. The reactivity is lower in the strongly paired regime of the multilayers (neutral assembly conditions) but otherwise is not affected by the pH of multilayer assembly. Silanization considerably broadens the range of possible functionalities for (PAH/PAA) multilayers: hydrophobicity, surface-initiated polymerization, and grafting of fluorescent probes by the formation of disulfide bridges are demonstrated. Conversely, our results also broaden the range of substrates that can be functionalized by silanes, using (PAH/PAA) multilayers as ubiquitous anchoring layers.
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Affiliation(s)
- Ali Dirani
- Bio & Soft Matter, Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain , Croix du Sud 1 L7.04.02, 1348 Louvain-la-Neuve, Belgium
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15
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Hardelauf H, Waide S, Sisnaiske J, Jacob P, Hausherr V, Schöbel N, Janasek D, van Thriel C, West J. Micropatterning neuronal networks. Analyst 2014; 139:3256-64. [DOI: 10.1039/c4an00608a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and effective method for patterning primary neuronal networks and circuits.
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Affiliation(s)
- Heike Hardelauf
- Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V
- 44139 Dortmund, Germany
| | - Sarah Waide
- Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V
- 44139 Dortmund, Germany
| | - Julia Sisnaiske
- Leibniz Research Centre for Working Environment and Human Factors – IfADo
- 44139 Dortmund, Germany
| | - Peter Jacob
- Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V
- 44139 Dortmund, Germany
| | - Vanessa Hausherr
- Leibniz Research Centre for Working Environment and Human Factors – IfADo
- 44139 Dortmund, Germany
| | - Nicole Schöbel
- Leibniz Research Centre for Working Environment and Human Factors – IfADo
- 44139 Dortmund, Germany
| | - Dirk Janasek
- Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V
- 44139 Dortmund, Germany
| | - Christoph van Thriel
- Leibniz Research Centre for Working Environment and Human Factors – IfADo
- 44139 Dortmund, Germany
| | - Jonathan West
- Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V
- 44139 Dortmund, Germany
- Institute for Life Sciences
- University of Southampton
- , UK
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16
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Moitra N, Kamei T, Kanamori K, Nakanishi K, Takeda K, Shimada T. Recyclable functionalization of silica with alcohols via dehydrogenative addition on hydrogen silsesquioxane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12243-12253. [PMID: 23977900 DOI: 10.1021/la402205j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Synthesis of class II hybrid silica materials requires the formation of covalent linkage between organic moieties and inorganic frameworks. The requirement that organosilylating agents be present to provide the organic part limits the synthesis of functional inorganic oxides, however, due to the water sensitivity and challenges concerning purification of the silylating agents. Synthesis of hybrid materials with stable molecules such as simple alcohols, rather than with these difficult silylating agents, may therefore provide a path to unprecedented functionality. Herein, we report the novel functionalization of silica with organic alcohols for the first time. Instead of using hydrolyzable organosilylating agents, we used stable organic alcohols with a Zn(II) catalyst to modify the surface of a recently discovered highly reactive macro-mesoporous hydrogen silsesquioxane (HSQ, HSiO1.5) monolith, which was then treated with water with the catalyst to form surface-functionalized silica. These materials were comprehensively characterized with FT-IR, Raman, solid-state NMR, fluorescence spectroscopy, thermal analysis, elemental analysis, scanning electron microscopy, and nitrogen adsorption-desorption measurements. The results obtained from these measurements reveal facile immobilization of organic moieties by dehydrogenative addition onto surface silane (Si-H) at room temperature with high loading and good tolerance of functional groups. The organic moieties can also be retrieved from the monoliths for recycling and reuse, which enables cost-effective and ecological use of the introduced catalytic/reactive surface functionality. Preservation of the reactivity of as-immobilized organic alcohols has been confirmed, moreover, by successfully performing copper-catalyzed azide-alkyne cycloaddition (CuAAC) "click" reactions on the immobilized silica surfaces.
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Affiliation(s)
- Nirmalya Moitra
- Department of Chemistry, Graduate School of Science, Kyoto University , Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
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17
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Ren L, Gao H, Gao S, Liu J, Zhang W. Determination of multilayer thicknesses of GaAs/AlAs
superlattice by grazing incidence X-ray reflectivity. INTERNATIONAL JOURNAL OF METROLOGY AND QUALITY ENGINEERING 2013. [DOI: 10.1051/ijmqe/2013040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The grazing incidence X-ray reflectivity is used to determine the multilayer thickness of
GaAs/AlAs supperlattice. The measurement process includes the fitting model and the
measurement conditions (different powers of 45 kV × 40 mA, 40 kV × 40 mA and 35 kV × 40
mA, different step sizes of 0.005°, 0.008° and 0.010°,
and different times per step of 1 s, 2 s, 3 s). In order to obtain the valid measurement
process, the combined standard deviation is used as the normal of the fitting results
selection. As a result, the measurement condition of 0.008° step size and 2 s
time per step with the power 40 kV × 40 mA is selectable with the operation stability of
facilities and smaller error.
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18
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Dirani A, Laloyaux X, Fernandes AE, Mathy B, Schicke O, Riant O, Nysten B, Jonas AM. Reversible Photomodulation of the Swelling of Poly(oligo(ethylene glycol) methacrylate) Thermoresponsive Polymer Brushes. Macromolecules 2012. [DOI: 10.1021/ma302106c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Ali Dirani
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Xavier Laloyaux
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Antony E. Fernandes
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Bertrand Mathy
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Olivier Schicke
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Olivier Riant
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Bernard Nysten
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
| | - Alain M. Jonas
- Bio & Soft Matter, Institute of Condensed Matter, Nanosciences, Université catholique de Louvain, Croix du Sud 1/L7.04.02, B1348 Louvain-la-Neuve, Belgium
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19
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Perez E, Lahlil K, Rougeau C, Moraillon A, Chazalviel JN, Ozanam F, Gouget-Laemmel AC. Influence of the molecular design on the antifouling performance of poly(ethylene glycol) monolayers grafted on (111) Si. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14654-14664. [PMID: 22988984 DOI: 10.1021/la303022a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Various poly(ethylene glycol) monomethyl ether moieties were grafted onto hydrogenated silicon surfaces in order to investigate the influence of the molecular design on the antifouling performance of such coatings. The grafted chains were either oligo(ethylene oxide) chains (EG)(n)OMe bound to silicon via Si-O-C covalent bonds, or hybrid alkyl/oligo(ethylene oxide) chains C(p)(EG)(n)OMe bound via Si-C covalent bonds (from home-synthesized precursors). Quantitative IR spectroscopy gave the molecular coverage of the grafted layers, and AFM imaging demonstrated that a proper surfactinated rinse yields C(p)(EG)(n)OMe layers free of unwanted residues. The protein-repellent character of these grafted layers (here, toward BSA) was studied by IR and AFM imaging. C(p)(EG)(n)OMe layers exhibit a lower surface concentration than (EG)(n)OMe layers, because of the presence of a solvent in the grafting solution; they however demonstrate high resistance against BSA adsorption for high values of the n/p ratio and a higher stability than (EG)(n)OMe. This behavior is consistently explained by the poor ordering capability of the alkyl part of the layer, contrary to what is observed for similar layers on Au, and the key role of an entangled arrangement of the ethylene oxide chains which forms when these chains are long enough.
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Affiliation(s)
- Emmanuel Perez
- Physique de la Matière Condensée, École Polytechnique, CNRS, 91128 Palaiseau, France
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20
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Foster EL, Bunha A, Advincula R. Click chemistry and electro-grafting onto colloidally templated conducting polymer arrays. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.05.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Dekeyser CM, Buron CC, Derclaye SR, Jonas AM, Marchand-Brynaert J, Rouxhet PG. Degradation of bare and silanized silicon wafer surfaces by constituents of biological fluids. J Colloid Interface Sci 2012; 378:77-82. [PMID: 22560491 DOI: 10.1016/j.jcis.2012.04.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 04/10/2012] [Accepted: 04/11/2012] [Indexed: 11/29/2022]
Abstract
The 24 h stability of bare silicon wafers as such or silanized with CH(3)O-(CH(2)-CH(2)-O)(n)-C(3)H(6)-trichlorosilane (n=6-9) was investigated in water, NaCl, phosphate and carbonate solutions, and in phosphate buffered saline (PBS) at 37 °C (close to biological conditions regarding temperature, high ionic strength, and pH). The resulting surfaces were analyzed using ellipsometry, X-ray Reflectometry (XRR), X-ray Photoelectron Spectroscopy (XPS), and Atomic Force Microscopy (AFM). Incubation of the silanized wafers in phosphate solution and PBS provokes a detachment of the silane layer. This is due to a hydrolysis of Si-O bonds which is favored by the action of phosphate, also responsible for a corrosion of non-silanized wafers. The surface alteration (detachment of silane layer and corrosion of the non-silanized wafer) is also important with carbonate solution, due to a higher pH (8.3). The protection of the silicon oxide layer brought by silane against the action of the salts is noticeable for phosphate but not for carbonate.
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Affiliation(s)
- C M Dekeyser
- Université catholique de Louvain, Institute of Condensed Matter and Nanosciences, Louvain-la-Neuve, Belgium
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22
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Xiu K, Cai Q, Li J, Yang X, Yang W, Xu F. Anti-fouling surfaces by combined molecular self-assembly and surface-initiated ATRP for micropatterning active proteins. Colloids Surf B Biointerfaces 2012; 90:177-83. [DOI: 10.1016/j.colsurfb.2011.10.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 10/11/2011] [Accepted: 10/12/2011] [Indexed: 10/16/2022]
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23
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Damiron D, Mazzolini J, Cousin F, Boisson C, D'Agosto F, Drockenmuller E. Poly(ethylene) brushes grafted to silicon substrates. Polym Chem 2012. [DOI: 10.1039/c1py00459j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Ferez L, Thami T, Akpalo E, Flaud V, Tauk L, Janot JM, Déjardin P. Interface of covalently bonded phospholipids with a phosphorylcholine head: characterization, protein nonadsorption, and further functionalization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:11536-11544. [PMID: 21848263 DOI: 10.1021/la202793k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Surface anchored poly(methylhydrosiloxane) (PMHS) thin films on oxidized silicon wafers or glass substrates were functionalized via the SiH hydrosilylation reaction with the internal double bonds of 1,2-dilinoleoyl-sn-glycero-3-phosphorylcholine (18:2 Cis). The surface was characterized by X-ray photoelectron spectroscopy, contact angle measurements, atomic force microscopy, and scanning electron microscopy. These studies showed that the PMHS top layer could be efficiently modified resulting in an interfacial high density of phospholipids. Grafted phospholipids made the initially hydrophobic surface (θ = 106°) very hydrophilic and repellent toward avidin, bovine serum albumin, bovine fibrinogen, lysozyme, and α-chymotrypsin adsorption in phosphate saline buffer pH 7.4. The surface may constitute a new background-stable support with increased biocompatibility. Further possibilities of functionalization on the surface remain available owing to the formation of interfacial SiOH groups by Karstedt-catalyzed side reactions of SiH groups with water. The presence of interfacial SiOH groups was shown by zeta potential measurements. The reactivity and surface density of SiOH groups were checked by fluorescence after reaction of a monoethoxy silane coupling agent bearing Alexa as fluorescent probe.
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Affiliation(s)
- Lynda Ferez
- Institut Européen des Membranes, Université Montpellier 2 (ENSCM, UM2, CNRS), CC047, 2 Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
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25
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Ross EE, Mok SW, Bugni SR. Assembly of lipid bilayers on silica and modified silica colloids by reconstitution of dried lipid films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8634-8644. [PMID: 21634797 DOI: 10.1021/la200952c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A method is presented for the assembly of lipid bilayers on silica colloids via reconstitution of dried lipid films solvent-cast from chloroform within packed beds of colloids ranging from 100 nm to 10 μm in diameter. Rapid solvent evaporation from the packed bed void volume results in uniform distribution of dried lipid throughout the colloidal bed. Fluorescence measurements indicate that significant, if not quantitative, retention of DOPC or DPPC films cast between sub-bilayer and multilayer quantities occurs when the colloids are redispersed in aqueous solution. Phospholipid bilayers assembled in this manner are shown to effectively passivate the surface of 250 nm colloids to nonspecific adsorption of bovine serum albumin. The method is shown to be capable of preparing supported bilayers on colloid surfaces that do not generally support vesicle fusion such as poly(ethylene glycol) (PEG) modified silica colloids. Bilayers of lipids that have not been reported to self-assemble by vesicle fusion, including gel-phase lipids and single-chain diacetylene amphiphiles, can also be formed by this method. The utility of the solid-core support is demonstrated by the facile assembly of supported lipid bilayers within fused silica capillaries to generate materials that are potentially suitable for the analysis of membrane interactions in a microchannel format.
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Affiliation(s)
- Eric E Ross
- Department of Chemistry & Biochemistry, Gonzaga University, Spokane, Washington 99258, United States.
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26
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Lee S, Park M, Park HS, Kim Y, Cho S, Cho JH, Park J, Hwang W. A polyethylene oxide-functionalized self-organized alumina nanochannel array for an immunoprotection biofilter. LAB ON A CHIP 2011; 11:1049-53. [PMID: 21283907 DOI: 10.1039/c0lc00499e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Nanochannel membranes have been fabricated for many biological and engineering applications. However, due to low-throughput process, high cost, unsuitable pore geometries, and low chemical/mechanical stability, we could not have obtained optimized nanochannel membranes for biomedical treatments as well as a novel building block for artificial cell membranes. Here, we report a PEO-functionalized straight nanochannel array based on a self-organized porous alumina for a novel biofilter with antifouling, superior immunoprotection and high permeability of nutrients, which have excellent in vivo mechanical stability. Thus, our strategy may provide great advantages in novel membrane biotechnologies such as biofiltration, artificial cells, and drug delivery.
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Affiliation(s)
- Sangmin Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, South Korea
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27
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Rosso M, Nguyen AT, de Jong E, Baggerman J, Paulusse JMJ, Giesbers M, Fokkink RG, Norde W, Schroën K, van Rijn CJM, Zuilhof H. Protein-repellent silicon nitride surfaces: UV-induced formation of oligoethylene oxide monolayers. ACS APPLIED MATERIALS & INTERFACES 2011; 3:697-704. [PMID: 21309535 DOI: 10.1021/am100985c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The grafting of polymers and oligomers of ethylene oxide onto surfaces is widely used to prevent nonspecific adsorption of biological material on sensors and membrane surfaces. In this report, we show for the first time the robust covalent attachment of short oligoethylene oxide-terminated alkenes (CH(3)O(CH(2)CH(2)O)(3)(CH(2))(11)-(CH═CH(2)) [EO(3)] and CH(3)O(CH(2)CH(2)O)(6)(CH(2))(11)-(CH═CH(2)) [EO(6)]) from the reaction of alkenes onto silicon-rich silicon nitride surfaces at room temperature using UV light. Reflectometry is used to monitor in situ the nonspecific adsorption of bovine serum albumin (BSA) and fibrinogen (FIB) onto oligoethylene oxide coated silicon-rich silicon nitride surfaces (EO(n)-Si(x)N(4), x > 3) in comparison with plasma-oxidized silicon-rich silicon nitride surfaces (SiO(y)-Si(x)N(4)) and hexadecane-coated Si(x)N(4) surfaces (C(16)-Si(x)N(4)). A significant reduction in protein adsorption on EO(n)-Si(x)N(4) surfaces was achieved, adsorption onto EO(3)-Si(x)N(4) and EO(6)-Si(x)N(4) were 0.22 mg m(-2) and 0.08 mg m(-2), respectively. The performance of the obtained EO(3) and EO(6) layers is comparable to those of similar, highly protein-repellent monolayers formed on gold and silver surfaces. EO(6)-Si(x)N(4) surfaces prevented significantly the adsorption of BSA (0.08 mg m(-2)). Atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), X-ray reflectivity and static water contact angle measurements were employed to characterize the modified surfaces. In addition, the stability of EO(6)-Si(x)N(4) surfaces in phosphate-buffered saline solution (PBS) and alkaline condition (pH 10) was studied. Prolonged exposure of the surfaces to PBS solution for 1 week or alkaline condition for 2 h resulted in only minor degradation of the ethylene oxide moieties and no oxidation of the Si(x)N(4) substrates was observed. Highly stable antifouling coatings on Si(x)N(4) surfaces significantly broaden the application potential of silicon nitride-coated microdevices, and in particular of microfabricated filtration membranes.
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Affiliation(s)
- Michel Rosso
- Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
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28
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Suriano R, Hume J, Cereda M, De Fazio M, Bianchessi M, Levi M, Turri S. Effect of oxidized silicon (SiOx
) surfaces functionalization on real-time PCR by Lab-on-a-chip microdevices. SURF INTERFACE ANAL 2011. [DOI: 10.1002/sia.3744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Ostaci RV, Damiron D, Al Akhrass S, Grohens Y, Drockenmuller E. Poly(ethylene glycol) brushes grafted to silicon substrates by click chemistry: influence of PEG chain length, concentration in the grafting solution and reaction time. Polym Chem 2011. [DOI: 10.1039/c0py00251h] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Shephard JJ, Dickie SA, McQuillan AJ. Structure and conformation of methyl-terminated poly(ethylene oxide)-bis[methylenephosphonate] ligands adsorbed to boehmite (AlOOH) from aqueous solutions. Attenuated total reflection infrared (ATR-IR) spectra and dynamic contact angles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:4048-4056. [PMID: 19928841 DOI: 10.1021/la903506q] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A ligand with a bisphosphonate headgroup and methyl-terminated poly(ethylene oxide) 550 tail has been adsorbed to a boehmite (AlOOH) particle film from aqueous solutions at 9, 18, 26, and 40 degrees C with a range of coverages. In situ attenuated total reflectance infrared (ATR-IR) spectra of the PEO-modified boehmite particle films has been used to monitor surface coverage. PEO-related IR absorptions showed variation in band shape with coverage and temperature which reflect changes in the configuration and crowding of PEO ligand tails. The integrated absorbance of PEO-related absorptions arising from CH(2) wagging and twisting vibrations indicated the average conformation about the C-C and C-O bonds. At all values of coverage and temperature, the PEO tails of the PEO-phosphonate ligands were found to have a predominantly gauche conformation about C-C bonds and a predominantly trans conformation about C-O bonds. The proportion of PEO with this predominant configuration, termed TGT, was found to vary with coverage and temperature and was most prevalent for PEO-modified boehmite surfaces with a ligand coverage of approximately 0.95 at 18 degrees C. Dynamic water contact angle measurements showed that PEO-modified surfaces with the greatest proportion of PEO in the TGT configuration were also the most hydrophilic, thus indicating that PEO in the TGT configuration was more hydrated or polar than other configurations. Variation in the proportion of PEO in the TGT configuration with temperature and coverage have been used to explain the variable resistance to protein adhesion reported for PEO-modified surfaces. Factors influencing the configuration of surface-bound PEO with changes in ligand coverage and temperature have been discussed.
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Affiliation(s)
- Jacob J Shephard
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
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31
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ZHU D, LIU Y, CHEN E, LI M, CHENG SZ. PSEUDO-DEWETTING BEHAVIOR OF LOW MOLECULAR WEIGHT POLY(ETHYLENE OXIDE) MELTS ON MICA SURFACE. ACTA POLYM SIN 2010. [DOI: 10.3724/sp.j.1105.2006.01125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Ostaci RV, Damiron D, Grohens Y, Léger L, Drockenmuller E. Click chemistry grafting of poly(ethylene glycol) brushes to alkyne-functionalized pseudobrushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1304-1310. [PMID: 19785428 DOI: 10.1021/la902482q] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A versatile method for the grafting of azide-terminated polymer chains to alkyne-functionalized pseudobrushes by the Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition has been developed. First, poly[(propargyl methacrylate)-r-(glycidyl methacrylate)-r-(methyl methacrylate)] random copolymers with monomer ratios of respectively 27/27/46, 41/31/28, and 45/55/0 were synthesized by RAFT polymerization. Then, dense alkyne-functionalized pseudobrushes were grafted in melt by thermal ring-opening of the glycidyl groups by the silanols from the silicon substrate. Finally, the grafting of tailor-made alpha-methoxy-omega-azido-poly(ethylene glycol)s (M(w) approximately 5000, 20,000, and 50,000 g/mol) by Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition was performed in sealed reactors at 60 degrees C for 72 h using a polymer weight fraction of 10% in tetrahydrofuran and Cu(PPh(3))(3)Br/DIPEA as the catalytic system. Alkyne-functionalized pseudobrushes and poly(ethylene glycol) brushes were characterized by ellipsometry, scanning probe microscopy, and water contact angle measurements. This "grafting-to" approach represents a fast and versatile method to provide thick and homogeneous polymer brushes with a high surface coverage. A major benefit of this strategy is the tunable and versatile tethering of alkyne functionalities to silicon substrates using a straightforward spin-coating procedure.
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Affiliation(s)
- Roxana-Viorela Ostaci
- Ingénierie des Matériaux Polymères (UMR CNRS 5223), Université Claude Bernard Lyon 1, 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
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33
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Herzer N, Hoeppener S, Schubert US. Fabrication of patterned silane based self-assembled monolayers by photolithography and surface reactions on silicon-oxide substrates. Chem Commun (Camb) 2010; 46:5634-52. [DOI: 10.1039/c0cc00674b] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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34
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Yang M, Wouters D, Giesbers M, Schubert US, Zuilhof H. Local probe oxidation of self-assembled monolayers on hydrogen-terminated silicon. ACS NANO 2009; 3:2887-900. [PMID: 19754133 DOI: 10.1021/nn9007059] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Local probe oxidation experiments by conductive AFM have been performed on a hexadecyl monolayer and a N-hydroxysuccinimide (NHS)-ester-functionalized undecyl (NHS-UA) monolayer assembled on hydrogen-terminated (i.e., unoxidized) silicon. The oxidation conditions for the mild oxidation of the top terminal groups of monolayers and the deep oxidation of the underlying silicon into silicon oxide were investigated. The results show that the bias threshold for the AFM tip-induced oxidation of the top groups of monolayers on oxide-free silicon can be reduced by 2 V for the methyl-terminated hexadecyl monolayer and even by 3.5 V for the active NHS-ester-terminated undecyl monolayer, in comparison to a methyl-terminated octadecyl trichlorosilane (OTS) monolayer on oxidized silicon. Upon such local mild oxidation, the active NHS ester group of the NHS-UA monolayer is selectively cleaved off to generate carboxyl-containing monolayer nanopatterns, opening further possibilities for subsequent patterned multifunctionalization.
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Affiliation(s)
- Menglong Yang
- Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
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Okamura Y, Fukui Y, Kabata K, Suzuki H, Handa M, Ikeda Y, Takeoka S. Novel platelet substitutes: disk-shaped biodegradable nanosheets and their enhanced effects on platelet aggregation. Bioconjug Chem 2009; 20:1958-65. [PMID: 19788180 DOI: 10.1021/bc900325w] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have studied biocompatible spherical carriers carrying a dodecapeptide, HHLGGAKQAGDV (H12), on their surface as platelet substitutes. This peptide is a fibrinogen γ-chain carboxy-terminal sequence (γ400-411) and specifically recognizes the active form of glycoprotein IIb/IIIa on activated platelets. Our purpose is to assess the possibility of making a novel platelet substitute consisting of disk-shaped nanosheets having a large contact area for the targeting site, rather than conventional small contact area spherical carriers. The H12 peptide was conjugated to the surface of the free-standing nanosheets made of biodegradable poly(d,l-lactide-co-glycolide) (PLGA). These H12-PLGA nanosheets were fabricated onto 3 μm disk-shaped patterned hydrophobic octadecyl regions on a SiO(2) substrate. By way of comparison, spherical H12-PLGA microparticles with the same surface area and conjugation number of H12 were also prepared. The resulting H12-PLGA nanosheets specifically interacted with the activated platelets adhered on the collagen surface at twice the rate of the H12-PLGA microparticles under flow conditions, and showed platelet thrombus formation in a two-dimensional spreading manner. Thus, H12-PLGA nanosheets might be a suitable candidate novel platelet alternative substitute for infused human platelet concentrates for the treatment of bleeding in patients with severe thrombocytopenia.
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Affiliation(s)
- Yosuke Okamura
- Department of Life Science and Medical Bioscience, Graduate School of Advanced Science and Engineering, Waseda University, TWIns, Tokyo, Japan
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Wong I, Ho CM. Surface molecular property modifications for poly(dimethylsiloxane) (PDMS) based microfluidic devices. MICROFLUIDICS AND NANOFLUIDICS 2009; 7:291-306. [PMID: 20357909 PMCID: PMC2847407 DOI: 10.1007/s10404-009-0443-4] [Citation(s) in RCA: 281] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2008] [Accepted: 03/31/2009] [Indexed: 05/02/2023]
Abstract
Fast advancements of microfabrication processes in past two decades have reached to a fairly matured stage that we can manufacture a wide range of microfluidic devices. At present, the main challenge is the control of nanoscale properties on the surface of lab-on-a-chip to satisfy the need for biomedical applications. For example, poly(dimethylsiloxane) (PDMS) is a commonly used material for microfluidic circuitry, yet the hydrophobic nature of PDMS surface suffers serious nonspecific protein adsorption. Thus the current major efforts are focused on surface molecular property treatments for satisfying specific needs in handling macro functional molecules. Reviewing surface modifications of all types of materials used in microfluidics will be too broad. This review will only summarize recent advances in nonbiofouling PDMS surface modification strategies applicable to microfluidic technology and classify them into two main categories: (1) physical approach including physisorption of charged or amphiphilic polymers and copolymers, as well as (2) chemical approach including self assembled monolayer and thick polymer coating. Pros and cons of a collection of available yet fully exploited surface modification methods are briefly compared among subcategories.
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Affiliation(s)
- Ieong Wong
- Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, USA,
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Yeu S, Lunn JD, Rangel HM, Shantz DF. The effect of surface modifications on protein microfiltration properties of Anopore™ membranes. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2008.11.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Frederich N, Nysten B, Duwez AS, Muls B, Hofkens J, Jonas AM, Habib-Jiwan JL. Nanopatterned monolayers of an adsorbed chromophore. NANOTECHNOLOGY 2008; 19:335303. [PMID: 21730622 DOI: 10.1088/0957-4484/19/33/335303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A simple lift-off process was developed to rapidly fabricate nanopatterned photofunctional surfaces. Dye molecules of a perylene derivative (PDID) were adsorbed irreversibly on clean silicon through the holes of an electron-beam lithographied polymer mask. The subsequent removal of the mask in a proper solvent results in PDID nanosized regions of width as small as 30 nm for stripes and of diameter as small as 120 nm for dots. Numerical analyses of atomic force microscopy and laser-scanning confocal microscopy images show that the dye molecules are confined to the regions defined by the lithographic process, with the integrated fluorescence intensity being essentially proportional to the size of the nanofeatures. This demonstrates that a simple organic lift-off process compatible with clean-room technology, and not involving any chemical step, is able to produce photofunctional nanopatterned surfaces, even though the dye is not chemically bonded to the silicon surface.
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Affiliation(s)
- N Frederich
- Unité de Physique et de Chimie des hauts Polymères, Université Catholique de Louvain, Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium. Unité de Chimie des Matériaux Organiques et Inorganiques, Université Catholique de Louvain, Place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium
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Oligo(ethylene glycol) monolayers by silanization of silicon wafers: Real nature and stability. J Colloid Interface Sci 2008; 324:118-26. [DOI: 10.1016/j.jcis.2008.05.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2007] [Revised: 05/01/2008] [Accepted: 05/01/2008] [Indexed: 11/21/2022]
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Ostaci RV, Damiron D, Capponi S, Vignaud G, Léger L, Grohens Y, Drockenmuller E. Polymer brushes grafted to "passivated" silicon substrates using click chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2732-2739. [PMID: 18247640 DOI: 10.1021/la703086x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We present herein a versatile method for grafting polymer brushes to passivated silicon surfaces based on the Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition (click chemistry) of omega-azido polymers and alkynyl-functionalized silicon substrates. First, the "passivation" of the silicon substrates toward polymer adsorption was performed by the deposition of an alkyne functionalized self-assembled monolayer (SAM). Then, three tailor-made omega-azido linear brush precursors, i.e., PEG-N3, PMMA-N3, and PS-N3 (Mn approximately 20,000 g/mol), were grafted to alkyne-functionalized SAMs via click chemistry in tetrahydrofuran. The SAM, PEG, PMMA, and PS layers were characterized by ellipsometry, scanning probe microscopy, and water contact angle measurements. Results have shown that the grafting process follows the scaling laws developed for polymer brushes, with a significant dependence over the weight fraction of polymer in the grafting solution and the grafting time. The chemical nature of the brushes has only a weak influence on the click chemistry grafting reaction and morphologies observed, yielding polymer brushes with thickness of ca. 6 nm and grafting densities of ca. 0.2 chains/nm2. The examples developed herein have shown that this highly versatile and tunable approach can be extended to the grafting of a wide range of polymer (pseudo-) brushes to silicon substrates without changing the tethering strategy.
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Affiliation(s)
- Roxana-Viorela Ostaci
- Université Claude Bernard Lyon 1, Laboratoire des Matériaux Polymères et Biomatériaux (IMP/LMPB, UMR CNRS 5223), 15 Boulevard Latarjet, 69622 Villeurbanne Cedex, France
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Iguerb O, Bertrand P. Graft photopolymerization of polyethylene glycol monoacrylate (PEGA) on poly(methyl methacrylate) (PMMA) films to prevent BSA adsorption. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2701] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Buron CC, Callegari V, Nysten B, Jonas AM. Resistance of poly(ethylene oxide)-silane monolayers to the growth of polyelectrolyte multilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:9667-73. [PMID: 17691828 DOI: 10.1021/la701055y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The ability of poly(ethylene oxide)-silane (PEO-silane) monolayers grafted onto silicon surfaces to resist the growth of polyelectrolyte multilayers under various pH conditions is assessed for different pairs of polyelectrolytes of varying molar mass. For acidic conditions (pH 3), the PEO-silane monolayers exhibit good polyelectrolyte repellency provided the polyelectrolytes bear no moieties that are able to form hydrogen bonds with the ether groups of the PEO chains. At basic pH, PEO-silane monolayers undergo substantial hydrolysis leading to the formation of negatively charged defects in the monolayers, which then play the role of adsorption sites for the polycation. Once the polycation is adsorbed, multilayer growth ensues. Because this is defect-driven growth, the multilayer is not continuous and is made of blobs or an open network of adsorbed strands. For such conditions, the molar mass of the polyelectrolyte plays a key role, with polyelectrolyte chains of larger molar mass adsorbing on a larger number of defects, resulting in stronger anchoring of the polyelectrolyte complex on the surfaces and faster subsequent growth of the multilayer. For polyelectrolytes of sufficiently low molar mass at pH 9, the growth of the multilayer can nevertheless be prevented for as much as five cycles of deposition.
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Affiliation(s)
- Cédric C Buron
- Unité de Chimie et de Physique des Hauts Polymères (POLY), Université Catholique de Louvain, Croix du Sud 1, B-1348 Louvain-la-Neuve, Belgium (EU)
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Wang YQ, Su YL, Sun Q, Ma XL, Jiang ZY. Generation of anti-biofouling ultrafiltration membrane surface by blending novel branched amphiphilic polymers with polyethersulfone. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2006.09.040] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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