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Bi X, Xu M, Xie Z, Li Y, Tian J, Wang Z, Wang Z. A Conceptual Strategy toward High-Reliability Metal-Thermoplastic Hybrid Structures Based on a Covalent-Bonding Mechanism. ACS APPLIED MATERIALS & INTERFACES 2022; 14:50363-50374. [PMID: 36240257 DOI: 10.1021/acsami.2c14385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Metal-thermoplastic hybrid structures have proven their effectiveness to achieve lightweight design concepts in both primary and secondary structural components of advanced aircraft. However, the drastic differences in physical and chemical properties between metal and thermoplastic make it challenging to fabricate high-reliability hybrid structures. Here, a simple and universal strategy to obtain strong hybrid structures thermoplastics is reported by regulating the bonding behavior at metal/thermoplastic interfaces. To achieve such, we first researched and uncovered the bonding mechanism at metal/thermoplastic interfaces by experimental methods and density functional theory (DFT) calculations. The results suggest that the interfacial covalency, which is formed due to the interfacial reaction between high-electronegativity elements of thermoplastics and metallic elements at metal surfaces, dominates the interfacial bonding interaction of metal-thermoplastic hybrid structures. The differences in electronegativity and atomic size between bonding atoms influence the covalent-bond strength and finally control the interfacial reliability of hybrid structures. Based on our covalent-bonding mechanism, the carboxyl functional group (COOH) is specifically grafted on polyetheretherketone (PEEK) by plasma polymerization to increase the density and strength of interfacial covalency and thus fabricate high-reliability hybrid structures between PEEK and A6061-T6 aluminum alloy. Current work provides an in-depth understanding of the bonding mechanism at metal-thermoplastics interfaces, which opens a fascinating direction toward high-reliability metal-thermoplastic hybrid structures.
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Affiliation(s)
- Xiaoyang Bi
- School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, PR China
| | - Mengjia Xu
- School of Mechanical Engineering and Automation, Northeastern University, No. 11 Wenhua Road, Shenyang 110819, PR China
- Foshan Graduate School of Innovation, Northeastern University, No. 2 Zhihui Road, Foshan 528300, PR China
| | - Zhengchao Xie
- School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, PR China
| | - Yan Li
- School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, PR China
| | - Jiyu Tian
- School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, PR China
| | - Zhenmin Wang
- School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641, PR China
| | - Zuankai Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
- Research Center for Nature-Inspired Engineering, City University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen, China
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2
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Blood cell quantification on dry blood samples: toward patient-centric complete blood counts. Bioanalysis 2022; 14:693-701. [PMID: 35593738 DOI: 10.4155/bio-2022-0029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Performing complete blood counts from patients' homes could have a transformative impact on e-based healthcare. Blood microsampling and sample drying are enabling elements for patient-centric healthcare. The aim of this study was to investigate the potential of dry blood samples for image-based cell quantification of red and white blood cells. Methods: A manual sample preparation method was developed and tested for image-based red and white blood cell counting. Results & conclusion: Dry blood samples enable image-based cell counting of red and white blood cells with a good correlation to gold standard hematology analyzer data (average coefficient of variation <6.5%; R2 >0.8) and resolve the basic morphology of white blood cell nuclei. The presented proof-of-principle study is a first step toward patient-centric complete blood counts.
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3
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A review of protein adsorption and bioactivity characteristics of poly ε-caprolactone scaffolds in regenerative medicine. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110892] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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How to Confer a Permanent Bio-Repelling and Bio-Adhesive Character to Biomedical Materials through Cold Plasmas. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10249101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Plasma Enhanced–Chemical Vapor Deposition (PE-CVD) of polyethylene oxide-like (PEO)-like coatings represent a successful strategy to address cell-behavior on biomaterials. Indeed, one of the main drawbacks of organic and hydrophilic films, like PEO-like ones, often consists in their poor adhesion to the substrate, especially in biological fluids where the biomaterial is required to operate. In this paper, low pressure (LP) and aerosol-assisted atmospheric pressure (aerosol-assisted AP) PE-CVD of PEO-like coatings is compared. The stability of the two different classes of coatings was investigated, both in water and in the cell culture media, during cell culture experiments. The obtained results show that, when deposited at atmospheric pressure (AP), the adhesion of the PEO-like coatings to the substrate has to be granted by an intermediate gradient layer. This interlayer can match the properties of the substrate with that of the topmost coatings, and, in turn, can dramatically improve the coating’s stability in complex biological fluids, like the cell culture medium. An accurate modulation of the experimental conditions, both at LP and AP, allowed control of the film chemical structure and surface properties, to permanently promote or discourage the cellular adhesion on the surfaces of biomaterials.
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5
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Plasma polymerization of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl in a collisional, capacitively coupled radio frequency discharge. Biointerphases 2020; 15:061007. [PMID: 33218222 DOI: 10.1116/6.0000662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Plasma polymerization of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) yields thin films containing stable nitroxide radicals that have properties analogous to that of nitric oxide (NO) without short lifetimes. This property gives TEMPO films a wide variety of potential applications. Typically, control of the final film chemistry is difficult and the plasma discharge conditions must be tailored to in order to maximize the retention of these nitroxide groups during the polymerization and deposition process. In this study, plasma diagnostics and surface analysis of the deposited films were carried out to determine the optimal plasma conditions for the retention of nitroxide groups. These techniques included energy-resolved mass spectrometry, heated planar probe ion current measurements, deposition rate measurements, and x-ray photoelectron spectroscopy (XPS). Results show that operating the plasma with a combination of low input powers and high pressures produces a collisional discharge in which fragmentation of the TEMPO molecule is suppressed, leading to good retention of nitroxide groups. Ion energy distribution functions and quartz crystal microbalance measurements support the soft landing theory of ion deposition on the substrate within this γ-mode, in which the flux of low energy, soft landed ions form the primary contribution to film growth. XPS analysis of deposited polymers shows 75.7% retention of N-O groups in the polymer films deposited in a 25 Pa 5 W discharge.
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6
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Stability of oxygen-rich plasma-polymerized coatings in aqueous environment. Biointerphases 2020; 15:061001. [PMID: 33126798 DOI: 10.1116/6.0000582] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In this work, we report on the stability of oxygen-rich plasma-polymerized (pp) films in an aqueous environment. The pp films were deposited via atmospheric-pressure plasma jet treatment of polymerizable organic liquids. The monomers used for the plasma-assisted polymerization were tetrahydrofurfuryl methacrylate, 1,2,4-trivinylcyclohexane, and mixtures thereof. The pp films were deposited at different plasma input powers ranging from 3 to 7 W. The stability of the obtained pp films was studied upon long-time storage in pure water and in buffer solutions of pHs 4, 7, and 10. After 24 h of storage of the pp films in de-ionized water, all of the studied pp films experienced thickness losses along with the formation of various ringlike structures at their surface, whereas Fourier transformed infrared (FT-IR) analysis showed no changes in their chemical composition. The pp films stored in pH 10 were completely delaminated from the substrate surface, while the pp films stored for 24 h in pH 4 showed swelling behavior, partial delamination, and the formation of wrinkles at the coatings' surface. The pp films stored for 24 h in pH 7 experienced minor thickness losses and formation of wrinkles at their surface. FT-IR analysis of the pp films stored in buffer solutions of pH 4 and pH 7 showed a decrease of C=O and an increase of O-H stretching signals in all of the cases. The observed chemical changes corresponded to the hydrolysis of esters presented in the pp films' structure.
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7
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Černochová P, Blahová L, Medalová J, Nečas D, Michlíček M, Kaushik P, Přibyl J, Bartošíková J, Manakhov A, Bačáková L, Zajíčková L. Cell type specific adhesion to surfaces functionalised by amine plasma polymers. Sci Rep 2020; 10:9357. [PMID: 32518261 PMCID: PMC7283471 DOI: 10.1038/s41598-020-65889-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/07/2020] [Indexed: 01/08/2023] Open
Abstract
Our previously-obtained impressive results of highly increased C2C12 mouse myoblast adhesion to amine plasma polymers (PPs) motivated current detailed studies of cell resistance to trypsinization, cell proliferation, motility, and the rate of attachment carried out for fibroblasts (LF), keratinocytes (HaCaT), rat vascular smooth muscle cells (VSMC), and endothelial cells (HUVEC, HSVEC, and CPAE) on three different amine PPs. We demonstrated the striking difference in the resistance to trypsin treatment between endothelial and non-endothelial cells. The increased resistance observed for the non-endothelial cell types was accompanied by an increased rate of cellular attachment, even though spontaneous migration was comparable to the control, i.e., to the standard cultivation surface. As demonstrated on LF fibroblasts, the resistance to trypsin was similar in serum-supplemented and serum-free media, i.e., medium without cell adhesion-mediating proteins. The increased cell adhesion was also confirmed for LF cells by an independent technique, single-cell force spectroscopy. This method, as well as the cell attachment rate, proved the difference among the plasma polymers with different amounts of amine groups, but other investigated techniques could not reveal the differences in the cell behaviour on different amine PPs. Based on all the results, the increased resistance to trypsinization of C2C12, LF, HaCaT, and VSMC cells on amine PPs can be explained most probably by a non-specific cell adhesion such as electrostatic interaction between the cells and amine groups on the material surface, rather than by the receptor-mediated adhesion through serum-derived proteins adsorbed on the PPs.
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Affiliation(s)
- P Černochová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - L Blahová
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - J Medalová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - D Nečas
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
| | - M Michlíček
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - P Kaushik
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - J Přibyl
- Core Facility Nanobiotechnology, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - J Bartošíková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - A Manakhov
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Research Institute of Clinical and Experimental Lymphology- Branch of the ICG SB RAS, 2 Timakova str., 630060, Novosibirsk, Russian Federation
| | - L Bačáková
- Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, Prague, 142 20, Czech Republic
| | - L Zajíčková
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic. .,Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic. .,Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic.
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8
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Kleinhans C, Schmohl L, Barz J, Kluger PJ. Low‐pressure plasma activation enables enhanced adipose‐derived stem cell adhesion. J Biomed Mater Res B Appl Biomater 2020; 108:1527-1535. [DOI: 10.1002/jbm.b.34500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 08/12/2019] [Accepted: 09/22/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Claudia Kleinhans
- Institute for Interfacial Process Engineering and Plasma Technology IGVP, University of Stuttgart Stuttgart Germany
| | - Lena Schmohl
- Fraunhofer Institute for Interfacial Engineering and Biotechnology Stuttgart Germany
| | - Jakob Barz
- Institute for Interfacial Process Engineering and Plasma Technology IGVP, University of Stuttgart Stuttgart Germany
- Fraunhofer Institute for Interfacial Engineering and Biotechnology Stuttgart Germany
| | - Petra J. Kluger
- Fraunhofer Institute for Interfacial Engineering and Biotechnology Stuttgart Germany
- Reutlingen University Reutlingen Germany
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9
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Makhneva E, Barillas L, Farka Z, Pastucha M, Skládal P, Weltmann KD, Fricke K. Functional Plasma Polymerized Surfaces for Biosensing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:17100-17112. [PMID: 32203654 DOI: 10.1021/acsami.0c01443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The capabilities of biosensors for fast, economic, and user-friendly analysis of complex samples has led to the exploitation of analytical devices for detection, quantification, and monitoring of specific chemical species for various applications. For a sufficiently high surface reactivity toward the adopted bioreceptors, a thin functional layer is required to enable coupling of the target biomolecules and to provide good stability in the presence of a sample matrix. In this work, the generation of water-stable oxygen-rich plasma polymerized (pp) films deposited by atmospheric-pressure jet plasma for reliable immobilization of biomolecules is presented. Three types of pp films were developed and characterized. All of the obtained pp films were successfully used as a matrix layer in the SPR immunosensors, which provided excellent level of sensitivity, stability, and regenerability. The achieved results show that atmospheric pressure plasma-induced polymerization is a powerful alternative method for the preparation of matrix layers for a wide range of applications in the biological field.
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Affiliation(s)
- Ekaterina Makhneva
- RG Bio Sensing Surfaces, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Straße 2, 17489 Greifswald, Germany
| | - Laura Barillas
- RG Bio Sensing Surfaces, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Straße 2, 17489 Greifswald, Germany
| | - Zdeněk Farka
- RG Nanobiotechnology, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Matěj Pastucha
- RG Nanobiotechnology, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Petr Skládal
- RG Nanobiotechnology, Central European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Klaus-Dieter Weltmann
- RG Bio Sensing Surfaces, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Straße 2, 17489 Greifswald, Germany
| | - Katja Fricke
- RG Bio Sensing Surfaces, Leibniz Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Straße 2, 17489 Greifswald, Germany
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10
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Exploiting Reactor Geometry to Manipulate the Properties of Plasma Polymerized Acrylic Acid Films. MATERIALS 2019; 12:ma12162597. [PMID: 31443201 PMCID: PMC6720200 DOI: 10.3390/ma12162597] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/12/2019] [Accepted: 08/13/2019] [Indexed: 11/17/2022]
Abstract
A number of different reactor geometries can be used to deposit plasma polymer films containing specific functional groups and result in films with differing properties. Plasma polymerization was carried out in a low-pressure custom-built stainless steel T-shaped reactor using a radio frequency generator. The internal aluminium disk electrode was positioned in two different geometries: parallel and perpendicular to the samples at varying distances to demonstrate the effect of varying the electrode position and distance from the electrode on the properties of plasma polymerized acrylic acid (ppAAc) films. The surface chemistry and film thickness before and after aqueous immersion were analysed via X-ray photoelectron spectroscopy and spectroscopic ellipsometry, respectively. For a perpendicular electrode, the ppAAc film thicknesses and aqueous stability decreased while the COOH/R group concentrations increased as the distance from the electrode increased due to decreased fragmentation. For films deposited at similar distances from the electrode, those deposited with the parallel electrode were thicker, had lower COOH/R group concentrations and greater aqueous stability. These results demonstrate the necessity of having a well characterized plasma reactor to enable the deposition of films with specific properties and how reactor geometry can be exploited to tailor film properties.
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11
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Functionalization of 3D Polylactic Acid Sponge Using Atmospheric Pressure Cold Plasma. INT J POLYM SCI 2019. [DOI: 10.1155/2019/2575987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The deposition of organic functionalities on biomaterials to immobilize biomolecules is a research area of great interest in the medical field. The surface functionalization of a 3D porous scaffolds of PDLLA with carboxyl (-COOH) and amino (-NH2) groups by cold plasma treatment at atmospheric pressure is described in this paper. Two methods of continuous and pulsed plasma deposition were compared to assess the degree of functionalization of the internal porous 3D scaffold. In particular, the pulsed plasma treatment was found to functionalize uniformly not only the sample surface but also inside the open cavities thanks to its permeability and diffusion in the porous 3D scaffold. The species developed in the plasma were studied by optical emission spectroscopy (OES) technique, while the functionalization of the sponges was evaluated by the Diffuse Reflectance Fourier-Transform Infrared Spectroscopy (DR-FTIR) technique using also the adsorption of ammonia (NH3) and deuterated water (D2O) probe molecules. The functional groups were deposited only on the front of the sponge, then the structural characterization of both front and back of the sponge has demonstrated the uniform functionalization of the entire scaffold.
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12
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Macgregor M, Vasilev K. Perspective on Plasma Polymers for Applied Biomaterials Nanoengineering and the Recent Rise of Oxazolines. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E191. [PMID: 30626075 PMCID: PMC6337614 DOI: 10.3390/ma12010191] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 12/21/2018] [Accepted: 01/02/2019] [Indexed: 11/16/2022]
Abstract
Plasma polymers are unconventional organic thin films which only partially share the properties traditionally attributed to polymeric materials. For instance, they do not consist of repeating monomer units but rather present a highly crosslinked structure resembling the chemistry of the precursor used for deposition. Due to the complex nature of the deposition process, plasma polymers have historically been produced with little control over the chemistry of the plasma phase which is still poorly understood. Yet, plasma polymer research is thriving, in par with the commercialisation of innumerable products using this technology, in fields ranging from biomedical to green energy industries. Here, we briefly summarise the principles at the basis of plasma deposition and highlight recent progress made in understanding the unique chemistry and reactivity of these films. We then demonstrate how carefully designed plasma polymer films can serve the purpose of fundamental research and biomedical applications. We finish the review with a focus on a relatively new class of plasma polymers which are derived from oxazoline-based precursors. This type of coating has attracted significant attention recently due to its unique properties.
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Affiliation(s)
- Melanie Macgregor
- School of Engineering, University of South Australia, Adelaide, SA 5000, Australia.
- Future Industries Institute, University of South Australia, Adelaide, SA 5000, Australia.
| | - Krasimir Vasilev
- School of Engineering, University of South Australia, Adelaide, SA 5000, Australia.
- Future Industries Institute, University of South Australia, Adelaide, SA 5000, Australia.
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13
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Multitechnique investigation into the aqueous behavior of plasma polymers. Biointerphases 2018; 13:06E410. [PMID: 30518217 DOI: 10.1116/1.5063750] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Plasma polymers are often used in applications requiring aqueous immersion; therefore, it is important to understand how this exposure affects the physical and chemical properties of the films. Three different plasma polymer films were deposited at different distances from the electrode, and the film properties were characterized using contact angle, ellipsometry, and x-ray photoelectron spectroscopy. The film behaviors in aqueous solutions were studied via quartz crystal microbalance with dissipation (QCM-D). Exposure to buffer solutions produced significant swelling of the plasma polymerized acrylic acid films, with swelling increasing with distance from the powered electrode, results that could be correlated with changes in film chemistry. Plasma polymerized octadiene and allylamine exhibited little swelling. These films exhibited changes in thickness and contact angle with respect to distance from the electrode, but this had little influence on their behavior in aqueous solution. By combining QCM-D with the more traditional surface chemical analysis techniques, the authors have been able to explore both swelling behavior and the effect that sample position and thus deposition parameters have on film properties and aqueous behavior. This approach gives the authors the basis to define deposition parameters to assist the engineering of thin films for applications such as biosensing and tissue engineering applications where specific chemistries and film behaviors are desired.
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14
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Pandiyaraj KN, Ramkumar MC, Arun Kumar A, Padmanabhan PVA, Pichumani M, Bendavid A, Cools P, De Geyter N, Morent R, Kumar V, Gopinath P, Su PG, Deshmukh RR. Evaluation of surface properties of low density polyethylene (LDPE) films tailored by atmospheric pressure non-thermal plasma (APNTP) assisted co-polymerization and immobilization of chitosan for improvement of antifouling properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 94:150-160. [PMID: 30423696 DOI: 10.1016/j.msec.2018.08.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 06/25/2018] [Accepted: 08/30/2018] [Indexed: 11/26/2022]
Abstract
This work describes the development of antifouling functional coatings on the surface of low density polyethylene (LDPE) films by means of atmospheric pressure non-thermal plasma (APNTP) assisted copolymerization using a mixture of acrylic acid and poly (ethylene glycol). The aim of the study was to investigate the antifouling properties of the plasma copolymerized LDPE films and the same was carried out as a function of deposition time with fixed applied potential of 14 kV. In a second stage, the plasma copolymerized LDPE films were functionalized with chitosan (CHT) to further enhance its antifouling properties. The surface hydrophilicity, structural, topographical and chemistry of the plasma copolymerized LDPE films were examined by contact angle (CA), X-ray diffraction (XRD), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Coating stability was also studied in detail over a storage time of 15 days by storing in water and air. The antifouling properties of the plasma copolymerized LDPE films were examined via protein adsorption and platelet adhesion studies. CA study showed significant changes in surface wettability after the coating process. XPS and FTIR analysis proved the presence of a dense multifunctional coating and an efficient immobilization of CHT. Substantial amendments in surface topography were observed, positively enhancing the overall surface hydrophilicity. Finally, in-vitro analysis showed excellent antifouling behavior of the surface modified LDPE films.
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Affiliation(s)
- K N Pandiyaraj
- Surface Engineering Laboratory, Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India.
| | - M C Ramkumar
- Surface Engineering Laboratory, Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India
| | - A Arun Kumar
- Surface Engineering Laboratory, Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India
| | - P V A Padmanabhan
- Surface Engineering Laboratory, Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India
| | - M Pichumani
- Department of Nano Science and Technology, Sri Ramakrishna Engineering College, Coimbatore 641022, India
| | - Avi Bendavid
- Plasma Processing & Deposition Team, CSIRO Manufacturing Flagship, Australia
| | - Pieter Cools
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent University, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - N De Geyter
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent University, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - R Morent
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent University, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - Vinay Kumar
- Nanobiotechnology Laboratory, Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - P Gopinath
- Nanobiotechnology Laboratory, Centre for Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Pi-Guey Su
- Department of Chemistry, Chinese Culture University, Taipei 111, Taiwan
| | - R R Deshmukh
- Department of Physics, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
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15
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Pleskunov P, Nikitin D, Tafiichuk R, Shelemin A, Hanuš J, Khalakhan I, Choukourov A. Carboxyl-Functionalized Nanoparticles Produced by Pulsed Plasma Polymerization of Acrylic Acid. J Phys Chem B 2018; 122:4187-4194. [PMID: 29578707 DOI: 10.1021/acs.jpcb.8b01648] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carboxyl-enriched and size-selected polymer nanoparticles (NPs) may prove to be very useful in biomedical applications for linker-free binding of biomolecules and their transport to cells. In this study, we report about the synthesis of such NPs by low-pressure low-temperature pulsed plasma polymerization of acrylic acid. Gas aggregation cluster source was adapted to operate plasma with a constant pulse period of 50 μs and with varying duty cycle. The NPs were produced with the size ranging from 31 ± 5 to 93 ± 14 nm and with retention of the carboxyl groups ranging from 4.0 to 12.0 atom %. Two regimes of the NP formation were identified. In the large duty cycle regime, the NP growth was interfered with by positive ion bombardment which resulted in the ion-driven detachment of the carboxyl species and in the formation of carboxyl-deficient NPs. In the small duty cycle regime, the NP growth was accompanied by the radical-driven chain propagation with the attachment of intact monomer molecules. Improved efficacy of the monomer retention resulted in increased concentration of the carboxyl groups.
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16
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Dorst J, Vandenbossche M, Amberg M, Bernard L, Rupper P, Weltmann KD, Fricke K, Hegemann D. Improving the Stability of Amino-Containing Plasma Polymer Films in Aqueous Environments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10736-10744. [PMID: 28922924 DOI: 10.1021/acs.langmuir.7b02135] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Plasma polymer films that contain amine groups (NH2-PPFs) are known to degrade over time, particularly in aqueous environments. To reduce such aging effects, a vertical chemical gradient regarding the amine group density was explored ranging over a few nanometers at the coating surface. The gradient-containing nanofilms were formed in low-pressure plasma by tuning plasma conditions while keeping the plasma "switched on". The coating process started with a more cross-linked NH2-PPF (70 W, 4:7 NH3/C2H4), followed by the deposition of a few nanometers of a less cross-linked yet more functional NH2-PPF (50 W, 7:7 NH3/C2H4). Characterization of the prepared gradient coatings showed that the chemical composition depends on the NH3/C2H4 gas flow ratio, as observed by different analytical methods: plasma diagnostics during deposition and depth profiling analyses of the deposited coating. Finally, surface chemistry was analyzed during air and water aging, showing a similar aging process of the NH2-PPF single layer and NH2-PPF with a vertical chemical gradient in air, while the stability of the gradient coating was found to be enhanced under aqueous conditions maintaining an [NH2]/[C] amount of ∼1%.
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Affiliation(s)
- J Dorst
- Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
- Leibniz Institute for Plasma Science and Technology (INP Greifswald e.V.) , Felix-Hausdorff-Strasse 2, 17489 Greifswald, Germany
| | - M Vandenbossche
- Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - M Amberg
- Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - L Bernard
- Empa, Swiss Federal Laboratories for Materials Science and Technology , Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - P Rupper
- Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
| | - K-D Weltmann
- Leibniz Institute for Plasma Science and Technology (INP Greifswald e.V.) , Felix-Hausdorff-Strasse 2, 17489 Greifswald, Germany
| | - K Fricke
- Leibniz Institute for Plasma Science and Technology (INP Greifswald e.V.) , Felix-Hausdorff-Strasse 2, 17489 Greifswald, Germany
| | - D Hegemann
- Empa, Swiss Federal Laboratories for Materials Science and Technology , Lerchenfeldstrasse 5, 9014 St. Gallen, Switzerland
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17
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Askew HJ, Charnley M, Jarvis KL, McArthur SL. pH-dependent lipid vesicle interactions with plasma polymerized thin films. Biointerphases 2017; 12:02C416. [PMID: 28592113 PMCID: PMC5462616 DOI: 10.1116/1.4984261] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 05/15/2017] [Accepted: 05/16/2017] [Indexed: 01/26/2023] Open
Abstract
Model lipid vesicle and supported lipid bilayer (SLB) systems are used in a variety of applications including biosensing, cell membrane mimics, and drug delivery. Exposure of a surface to a vesicle solution provides a straightforward method for creating such systems via vesicle adsorption and collapse. However, this process is complex and the relationship between the surface physicochemical properties and vesicle collapse is poorly understood. Plasma polymers are thin conformal films that can be applied to a variety of materials to modify surface properties. This paper uses quartz crystal microbalance with dissipation and fluorescence recovery after photobleaching (FRAP) to explore lipid vesicle interactions with plasma polymerized acrylic acid (ppAAc), allylamine (ppAAm), and ppAAc/ppAAm micropatterns. Vesicle interactions were dependent on plasma polymer chemistry and pH of the buffer solution. Vesicles readily and stably adsorbed to ppAAm over a wide pH range. ppAAc demonstrated limited interactions at pH 7 and vesicle adsorption at pH 4. Vesicle collapse and SLB formation could be induced using a pH change. FRAP was used to explore the fluidity of the lipid structures on both the patterned and unpatterned plasma polymer films. On ppAAm/ppAAc micropatterns, pH transitions combined with the presence of chemically distinct regions on the same substrate enabled immobile lipid islands on ppAAc to be surrounded by fluid lipid regions on ppAAm. This work demonstrates that plasma polymer films could enable spatially controlled vesicle adsorption and SLB formation on a wide variety of different substrates.
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Affiliation(s)
- Hannah J Askew
- Biointerface Engineering Group, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Mirren Charnley
- Biointerface Engineering Group, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia and Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Karyn L Jarvis
- Biointerface Engineering Group, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia and ANFF-Vic Biointerface Engineering Hub, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
| | - Sally L McArthur
- Biointerface Engineering Group, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia and ANFF-Vic Biointerface Engineering Hub, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
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18
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Loyer F, Frache G, Choquet P, Boscher ND. Atmospheric Pressure Plasma-Initiated Chemical Vapor Deposition (AP-PiCVD) of Poly(alkyl acrylates): An Experimental Study. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00461] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- François Loyer
- Department of Materials Research and Technology, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg
| | - Gilles Frache
- Department of Materials Research and Technology, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg
| | - Patrick Choquet
- Department of Materials Research and Technology, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg
| | - Nicolas D. Boscher
- Department of Materials Research and Technology, Luxembourg Institute of Science and Technology, L-4422 Belvaux, Luxembourg
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19
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Harper T, Slegeris R, Pramudya I, Chung H. Single-Phase Photo-Cross-Linkable Bioinspired Adhesive for Precise Control of Adhesion Strength. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1830-1839. [PMID: 27966868 DOI: 10.1021/acsami.6b14599] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A bioinspired, modular terpolymer adhesive, poly(N-methacryloyl-3,4-dihydroxyl-l-phenylalanine-co-9-(acryloyloxy)butyl anthracene-9-carboxylate-co-acrylic acid), has been synthesized containing three different functionalities: a photo-cross-linking segment, a wet interfacial adhesion segment, and a water-soluble segment. The synthesized adhesive polymer is the first example of a single-phase, photo-cross-linkable adhesive which does not require additional photoinitiator or other cross-linking agents. The terpolymer demonstrates strong adhesion when it swells in water and/or ethanol. The terpolymer is composed of three repeating units: N-methacryloyl-3,4-dihydroxyl-l-phenylalanine (MDOPA), which has been known to generate strong adhesion under wet conditions, poly(acrylic acid), which has been known to increase water solubility of polymers, and a photo-cross-linking segment consisting of an anthracene-based monomer used for enhancement of cohesion properties via UV irradiation (352 nm). A photomediated [4 + 4] cycloaddition reaction of anthracene results in the cross-linking of individual polymer chains after interfacial adhesion between substrates and adhesive polymers. Chemically, the covalent photo-cross-linking was confirmed by UV-vis, 1H NMR, and gel permeation chromatography (GPC). The cross-linking-fortified cohesion of the adhesive polymer network yields strengthened cohesion properties of the bulk material. The photoreaction was conveniently controlled via the duration of UV-irradiation. The adhesion properties of new adhesives were characterized by lap shear strength on transparent Mylar film and glasses after the adhesive was swollen in biologically friendly solvents including water and ethanol. The adhesion strength (J/m2) was enhanced by 850% under 352 nm UV-irradiation. Multiple application variables were tested to determine the optimal conditions, such as solvent, concentration, polymer composition, and substrate. The best adhesion properties were obtained from a 1:1 weight ratio of polymer:solvent in water on a Mylar film surface. As a single-phase system, the synthesized terpolymer is very convenient to use, and its adhesion strength can be easily modified by UV light. Additionally, the terpolymer's high water compatibility makes it ideally suited for application in the biomedical field.
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Affiliation(s)
- Tristan Harper
- Department of Chemical and Biomedical Engineering, Florida State University , Tallahassee, Florida 32310, United States
| | - Rimantas Slegeris
- Department of Chemical and Biomedical Engineering, Florida State University , Tallahassee, Florida 32310, United States
| | - Irawan Pramudya
- Department of Chemical and Biomedical Engineering, Florida State University , Tallahassee, Florida 32310, United States
| | - Hoyong Chung
- Department of Chemical and Biomedical Engineering, Florida State University , Tallahassee, Florida 32310, United States
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20
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Watkins LM, Lee AF, Moir JWB, Wilson K. Plasma-Generated Poly(allyl alcohol) Antifouling Coatings for Cellular Attachment. ACS Biomater Sci Eng 2017; 3:88-94. [PMID: 33429685 DOI: 10.1021/acsbiomaterials.6b00705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Conformal poly(allyl alcohol) (PAA) coatings were grown on a biomedical grade polyurethane scaffold using pulsed plasma polymerization of the allyl alcohol monomer. The creation of a continuous wave polymer primer layer increases the interfacial adhesion and stability of a subsequent pulsed plasma deposited PAA film. The resulting PAA coatings are strongly hydrophilic and stable following 7 days incubation in biological media. Films prepared through this energy-efficient, two-step process promote human dermal fibroblast cell culture, while resisting E. coli biofilm formation.
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Affiliation(s)
| | - Adam F Lee
- European Bioenergy Research Institute, Aston University, Aston Triangle, Birmingham B4 7ET, United Kingdom
| | | | - Karen Wilson
- European Bioenergy Research Institute, Aston University, Aston Triangle, Birmingham B4 7ET, United Kingdom
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21
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Trimukhe AM, Pandiyaraj KN, Tripathi A, Melo JS, Deshmukh RR. Plasma Surface Modification of Biomaterials for Biomedical Applications. ADVANCED STRUCTURED MATERIALS 2017. [DOI: 10.1007/978-981-10-3328-5_3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Flynn SP, Monaghan R, Bogan J, McKenna M, Cowley A, Daniels S, Hughes G, Kelleher SM. Controlling wettability of PECVD-deposited dual organosilicon/carboxylic acid films to influence DNA hybridisation assay efficiency. J Mater Chem B 2017; 5:8378-8388. [DOI: 10.1039/c7tb01925d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Plasma oxidation of Zeonor and deposition of TEOS/AA thin film showing dual layer effect on the surface.
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Affiliation(s)
- S. P. Flynn
- National Centre for Plasma Science and Technology
- Glasnevin
- Dublin 9
- Ireland
- School of Chemistry
| | - R. Monaghan
- National Centre for Plasma Science and Technology
- Glasnevin
- Dublin 9
- Ireland
- Biomedical Diagnostic Institute
| | - J. Bogan
- School of Physical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - M. McKenna
- National Centre for Plasma Science and Technology
- Glasnevin
- Dublin 9
- Ireland
- Biomedical Diagnostic Institute
| | - A. Cowley
- National Centre for Plasma Science and Technology
- Glasnevin
- Dublin 9
- Ireland
| | - S. Daniels
- National Centre for Plasma Science and Technology
- Glasnevin
- Dublin 9
- Ireland
- Biomedical Diagnostic Institute
| | - G. Hughes
- School of Physical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - S. M. Kelleher
- National Centre for Plasma Science and Technology
- Glasnevin
- Dublin 9
- Ireland
- School of Chemistry
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23
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Smith LE, Bryant C, Krasowska M, Cowin AJ, Whittle JD, MacNeil S, Short RD. Haptotatic Plasma Polymerized Surfaces for Rapid Tissue Regeneration and Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2016; 8:32675-32687. [PMID: 27934156 DOI: 10.1021/acsami.6b11320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Skin has a remarkable capacity for regeneration; however, with an ever aging population, there is a growing burden to the healthcare system from chronic wounds. Novel therapies are required to address the problems associated with nonhealing chronic wounds. Novel wound dressings that can encourage increased reepithelialization could help to reduce the burden of chronic wounds. A suite of chemically defined surfaces have been produced using plasma polymerization, and the ability of these surfaces to support the growth of primary human skin cells has been assessed. Additionally, the ability of these surfaces to modulate cell migration and morphology has also been investigated. Keratinocytes and endothelial cells were extremely sensitive to surface chemistry showing increased viability and migration with an increased number of carboxylic acid functional groups. Fibroblasts proved to be more tolerant to changes in surface chemistry; however, these cells migrated fastest over amine-functionalized surfaces. The novel combination of comprehensive chemical characterization coupled with the focus on cell migration provides a unique insight into how a material's physicochemical properties affect cell migration.
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Affiliation(s)
- Louise E Smith
- Wound Management Innovation Cooperative Research Centre , Brisbane 4059, Queensland, Australia
- Future Industries Institute, University of South Australia , Adelaide 5095, South Australia, Australia
| | - Christian Bryant
- Wound Management Innovation Cooperative Research Centre , Brisbane 4059, Queensland, Australia
| | - Marta Krasowska
- Future Industries Institute, University of South Australia , Adelaide 5095, South Australia, Australia
- School of Information Technology and Mathematical Sciences, University of South Australia , Adelaide, 5095, South Australia, Australia
| | - Allison J Cowin
- Wound Management Innovation Cooperative Research Centre , Brisbane 4059, Queensland, Australia
- Future Industries Institute, University of South Australia , Adelaide 5095, South Australia, Australia
| | - Jason D Whittle
- Wound Management Innovation Cooperative Research Centre , Brisbane 4059, Queensland, Australia
- School of Engineering, University of South Australia , Adelaide 5095, South Australia, Australia
| | - Sheila MacNeil
- Kroto Research Institute, University of Sheffield , Sheffield S3 7HQ, South Yorkshire, United Kingdom
| | - Robert D Short
- Wound Management Innovation Cooperative Research Centre , Brisbane 4059, Queensland, Australia
- Future Industries Institute, University of South Australia , Adelaide 5095, South Australia, Australia
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24
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Bashir M, Bashir S. Polymerization of acrylic acid using atmospheric pressure DBD plasma jet. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1757-899x/146/1/012036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Study of the adhesive properties versus stability/aging of hernia repair meshes after deposition of RF activated plasma polymerized acrylic acid coating. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 65:287-94. [DOI: 10.1016/j.msec.2016.04.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 03/23/2016] [Accepted: 04/14/2016] [Indexed: 11/20/2022]
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26
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Mattioli-Belmonte M, Lucarini G, Virgili L, Biagini G, Detomaso L, Favia P, D’Agostino R, Gristina R, Gigante A, Bevilacqua C. Mesenchymal Stem Cells on Plasma-Deposited Acrylic Acid Coatings: An In Vitro Investigation to Improve Biomaterial Performance in Bone Reconstruction. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911505055159] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this in vitro investigation of a heterogeneous range of bio-functional and modulatory performances of mesenchymal stem cells (MSCs) grown on two plasma-deposited acrylic acid (pdAA) coatings, which differed in chemical characteristics, a view of their potential utility as hybrid scaffolds for bone tissue engineering was obtained. The in vitro behavior of MSCs was compared to that of MG-63 cells, an osteoblast-like cell line that is commonly used to test biocompatibility of materials intended for bone-tissue interface. The coatings exerted a greater stimulus on MSCs and on MG-63 cells in comparison with control cultures. Both studied coatings exhibited satisfactory compatibility and modulatory effects on MSCs, thus they may be suitable for use in 2D or 3D scaffolds for bone tissue reconstruction.
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Affiliation(s)
- M. Mattioli-Belmonte
- Istituto di Morfologia Umana Normale, Università Politecnica delle Marche, Via Tronto 10/a, 60020 Ancona, Italy,
| | - G. Lucarini
- Istituto di Morfologia Umana Normale, Università Politecnica delle Marche, Via Tronto 10/a, 60020 Ancona, Italy
| | - L. Virgili
- Istituto di Morfologia Umana Normale, Università Politecnica delle Marche, Via Tronto 10/a, 60020 Ancona, Italy
| | - G. Biagini
- Istituto di Morfologia Umana Normale, Università Politecnica delle Marche, Via Tronto 10/a, 60020 Ancona, Italy
| | - L. Detomaso
- Dipartimento di Chimica, Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy
| | - P. Favia
- Dipartimento di Chimica, Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy
| | - R. D’Agostino
- Dipartimento di Chimica, Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy
| | - R. Gristina
- Istituto di Metodologie Inorganiche e dei Plasmi (IMIP)-CNR, c/o Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy
| | - A. Gigante
- Dipartimento di Patologia Molecolare e Terapie Innovative, Università Politecnica delle Marche, Via Tronto 10/a, 60020 Ancona, Italy
| | - C. Bevilacqua
- Dipartimento di Patologia Molecolare e Terapie Innovative, Università Politecnica delle Marche, Via Tronto 10/a, 60020 Ancona, Italy
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27
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Akhavan B, Menges B, Förch R. Inhomogeneous Growth of Micrometer Thick Plasma Polymerized Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4792-4799. [PMID: 27111265 DOI: 10.1021/acs.langmuir.6b01050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Plasma polymerization is traditionally recognized as a homogeneous film-forming technique. It is nevertheless reasonable to ask whether micrometer thick plasma polymerized structures are really homogeneous across the film thickness. Studying the properties of the interfacial, near-the-substrate (NTS) region in plasma polymer films represents particular experimental challenges due to the inaccessibility of the buried layers. In this investigation, a novel non-destructive approach has been utilized to evaluate the homogeneity of plasma polymerized acrylic acid (PPAc) and 1,7-octadiene (PPOD) films in a single measurement. Studying the variations of refractive index throughout the depth of the films was facilitated by a home-built surface plasmon resonance (SPR)/optical waveguide (OWG) spectroscopy setup. It has been shown that the NTS layer of both PPAc and PPOD films exhibits a significantly lower refractive index than the bulk of the film that is believed to indicate a higher concentration of internal voids. Our results provide new insights into the growth mechanisms of plasma polymer films and challenge the traditional view that considers plasma polymers as homogeneous and continuous structures.
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Affiliation(s)
- Behnam Akhavan
- School of Physics, A28, University of Sydney , Sydney, NSW 2006, Australia
- School of Engineering, University of South Australia , Mawson Lakes, SA 5095, Australia
| | - Bernhard Menges
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Renate Förch
- Fraunhofer ICT-IMM, Carl-Zeiss-Str. 18-20, Mainz 55129, Germany
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28
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Villegas M, Romero AI, Parentis ML, Castro Vidaurre EF, Gottifredi JC. Acrylic acid plasma polymerized poly(3-hydroxybutyrate) membranes for methanol/MTBE separation by pervaporation. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2016.01.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Owen R, Sherborne C, Paterson T, Green NH, Reilly GC, Claeyssens F. Emulsion templated scaffolds with tunable mechanical properties for bone tissue engineering. J Mech Behav Biomed Mater 2016; 54:159-72. [PMID: 26458114 PMCID: PMC4717122 DOI: 10.1016/j.jmbbm.2015.09.019] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 09/09/2015] [Accepted: 09/14/2015] [Indexed: 11/01/2022]
Abstract
Polymerised High Internal Phase Emulsions (PolyHIPEs) are manufactured via emulsion templating and exhibit a highly interconnected microporosity. These materials are commonly used as thin membranes for 3D cell culture. This study uses emulsion templating in combination with microstereolithography to fabricate PolyHIPE scaffolds with a tightly controlled and reproducible architecture. This combination of methods produces hierarchical structures, where the microstructural properties can be independently controlled from the scaffold macrostructure. PolyHIPEs were fabricated with varying ratios of two acrylate monomers (2-ethylhexyl acrylate (EHA) and isobornyl acrylate (IBOA)) and varying nominal porosity to tune mechanical properties. Young's modulus, ultimate tensile stress (UTS) and elongation at failure were determined for twenty EHA/IBOA compositions. Moduli ranged from 63.01±9.13 to 0.36±0.04MPa, UTS from 2.03±0.33 to 0.11±0.01MPa and failure strain from 21.86±2.87% to 2.60±0.61%. Selected compositions were fabricated into macro-porous woodpile structures, plasma treated with air or acrylic acid and seeded with human embryonic stem-cell derived mesenchymal progenitor cells (hES-MPs). Confocal and two-photon microscopy confirmed cell proliferation and penetration into the micro- and macro-porous architecture. The scaffolds supported osteogenic differentiation of mesenchymal cells and interestingly, the stiffest IBOA-based scaffolds that were plasma treated with acrylic acid promoted osteogenesis more strongly than the other scaffolds.
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Affiliation(s)
- Robert Owen
- Department of Materials Science and Engineering, University of Sheffield, INSIGNEO Institute for in silico medicine, The Pam Liversidge Building, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Colin Sherborne
- Department of Materials Science and Engineering, University of Sheffield, The Kroto Research Institute, North Campus, Broad Lane, Sheffield S3 7HQ, United Kingdom
| | - Thomas Paterson
- Department of Materials Science and Engineering, University of Sheffield, The Kroto Research Institute, North Campus, Broad Lane, Sheffield S3 7HQ, United Kingdom
| | - Nicola H Green
- Department of Materials Science and Engineering, University of Sheffield, The Kroto Research Institute, North Campus, Broad Lane, Sheffield S3 7HQ, United Kingdom
| | - Gwendolen C Reilly
- Department of Materials Science and Engineering, University of Sheffield, INSIGNEO Institute for in silico medicine, The Pam Liversidge Building, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Frederik Claeyssens
- Department of Materials Science and Engineering, University of Sheffield, The Kroto Research Institute, North Campus, Broad Lane, Sheffield S3 7HQ, United Kingdom.
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30
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Ding R, Wu Y, Chen Y, Chen H, Wang J, Shi Y, Yang M. Catalytic hydrodeoxygenation of palmitic acid over a bifunctional Co-doped MoO2/CNTs catalyst: an insight into the promoting effect of cobalt. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01575h] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
HDO of palmitic acid into C16 hydrocarbons was successfully achieved over Co doped MoO2/CNTs catalysts at a much lower temperature. Co could promote the formation of Lewis acidic sites, oxygen vacancies and Mo2C particles, which are all decisive factors for better catalytic activity.
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Affiliation(s)
- Ranran Ding
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- PR China
| | - Yulong Wu
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- PR China
- Beijing Engineering Research Center for Biofuels
| | - Yu Chen
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- PR China
| | - Hao Chen
- School of Chemical Engineering and Technology
- Xi'an Jiaotong University
- Xi'an 710049
- PR China
| | - Jianlong Wang
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- PR China
| | - Yanchun Shi
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- PR China
| | - Mingde Yang
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- PR China
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31
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Yang Y, Wang L, Wang P, Wang F, He H, Wang X. Photo-polymerization of monomer crystals producing thermo-responsive micropatterns to direct cell growth and cell selective harvest. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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32
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Development of antibacterial quaternary ammonium silane coatings on polyurethane catheters. J Colloid Interface Sci 2015; 451:78-84. [DOI: 10.1016/j.jcis.2015.04.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 04/02/2015] [Accepted: 04/03/2015] [Indexed: 01/12/2023]
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33
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Zheng Y, Xiong C, Wang Z, Zhang L. Enhanced osteoblast cells adhesion, spreading, and proliferation to surface-carboxylated poly(etheretherketone). J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911515572494] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Poly(etheretherketone) is a rigid semicrystalline thermoplastic that combines excellent mechanical properties, broad chemical resistance, and bone-like stiffness, and is widely used in biomedical fields. However, the hydrophobic bio-inert surface of poly(etheretherketone) tends to hinder its biomedical applications when direct osteointegration between the implants and the host tissue is desired. In this investigation, poly(etheretherketone) surface was functionalized by a method with chemistry analogous to the formation of organosilane self-assembled monolayers on glass or silicon. First, poly(etheretherketone) surface activation with selective carbonyl reduction introduces surface hydroxylation. And then treatment of the hydroxylation-pretreated poly(etheretherketone) samples with a substituted organosilane solution forms the carboxyl (–COOH) functional surface layers. The modified surfaces were characterized using X-ray photoelectron spectroscopy, water contact angle measurements, differential scanning calorimetry, X-ray diffraction, and surface profiler. The effect of cell adhesion, spreading, and proliferation on each specimen was investigated. Pre-osteoblast cells (MC3T3-E1) adhesion, spreading, and proliferation were improved remarkably on surface-carboxylated poly(etheretherketone). Poly(etheretherketone) modified with –COOH on its surface has potential use in orthopedic or dental implants.
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Affiliation(s)
- Yanyan Zheng
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Chengdong Xiong
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, People’s Republic of China
| | - Zhecun Wang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Lifang Zhang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, People’s Republic of China
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Liu X, Feng Q, Bachhuka A, Vasilev K. Surface modification by allylamine plasma polymerization promotes osteogenic differentiation of human adipose-derived stem cells. ACS APPLIED MATERIALS & INTERFACES 2014; 6:9733-9741. [PMID: 24893152 DOI: 10.1021/am502170s] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Tuning the material properties in order to control the cellular behavior is an important issue in tissue engineering. It is now well-established that the surface chemistry can affect cell adhesion, proliferation, and differentiation. In this study, plasma polymerization, which is an appealing method for surface modification, was employed to generate surfaces with different chemical compositions. Allylamine (AAm), acrylic acid (AAc), 1,7-octadiene (OD), and ethanol (ET) were used as precursors for plasma polymerization in order to generate thin films rich in amine (-NH2), carboxyl (-COOH), methyl (-CH3), and hydroxyl (-OH) functional groups, respectively. The surface chemistry was characterized by X-ray photoelectron spectroscopy (XPS), the wettability was determined by measuring the water contact angles (WCA) and the surface topography was imaged by atomic force microscopy (AFM). The effects of surface chemical compositions on the behavior of human adipose-derive stem cells (hASCs) were evaluated in vitro: Cell Count Kit-8 (CCK-8) analysis for cell proliferation, F-actin staining for cell morphology, alkaline phosphatase (ALP) activity analysis, and Alizarin Red S staining for osteogenic differentiation. The results show that AAm-based plasma-polymerized coatings can promote the attachment, spreading, and, in turn, proliferation of hASCs, as well as promote the osteogenic differentiation of hASCs, suggesting that plasma polymerization is an appealing method for the surface modification of scaffolds used in bone tissue engineering.
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Affiliation(s)
- Xujie Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, China
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Vasudev MC, Anderson KD, Bunning TJ, Tsukruk VV, Naik RR. Exploration of plasma-enhanced chemical vapor deposition as a method for thin-film fabrication with biological applications. ACS APPLIED MATERIALS & INTERFACES 2013; 5:3983-94. [PMID: 23668863 DOI: 10.1021/am302989x] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Chemical vapor deposition (CVD) has been used historically for the fabrication of thin films composed of inorganic materials. But the advent of specialized techniques such as plasma-enhanced chemical vapor deposition (PECVD) has extended this deposition technique to various monomers. More specifically, the deposition of polymers of responsive materials, biocompatible polymers, and biomaterials has made PECVD attractive for the integration of biotic and abiotic systems. This review focuses on the mechanisms of thin-film growth using low-pressure PECVD and current applications of classic PECVD thin films of organic and inorganic materials in biological environments. The last part of the review explores the novel application of low-pressure PECVD in the deposition of biological materials.
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Affiliation(s)
- Milana C Vasudev
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45432, United States
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Sardella E, Liuzzi F, Comparelli R, Depalo N, Striccoli M, Agostiano A, Favia P, Curri ML. Functionalized luminescent nanocrystals on patterned surfaces obtained by radio frequency glow discharges. NANOTECHNOLOGY 2013; 24:145302. [PMID: 23507981 DOI: 10.1088/0957-4484/24/14/145302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this work a genuine combination of a bottom-up approach, which is based on synthesis and functionalization of emitting nanocrystals (NCs), with a top-down strategy, which relies on a flexible and versatile cold plasma process, is shown. Luminescent semiconducting colloidal NCs consisting of a CdSe core coated with a ZnS shell (CdSe@ZnS) are directly assembled onto micro-patterned substrates previously functionalized by means of glow discharges performed through physical masks. The NC assembly is driven by electrostatic interactions that led to their successful organization into spatially resolved domains. Two distinct protocols are tested, the former using a plasma deposition process combined with an electrostatic layer-by-layer procedure, the latter based on a two-step plasma deposition/treatment process. The procedures are thoroughly monitored with fluorescence microscopy, atomic force microscopy, x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy and scanning electron microscopy. The two-step plasma protocol is demonstrated to be more efficient in directing a uniform and specific assembly of luminescent NCs with respect to the hybrid procedure. The presented 'mix and match' approach offers great potential for integrating NCs, with their unique size-dependent properties, into microstructures, providing a universal platform for the fabrication of sensors, biochips, displays and switches.
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Affiliation(s)
- E Sardella
- CNR-IMIP (UOS Bari) c/o Dipartimento di Chimica, Università degli Studi di Bari, via Orabona 4, I-70126 Bari, Italy.
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37
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Kleinhans C, Barz J, Wurster S, Willig M, Oehr C, Müller M, Walles H, Hirth T, Kluger PJ. Ammonia plasma treatment of polystyrene surfaces enhances proliferation of primary human mesenchymal stem cells and human endothelial cells. Biotechnol J 2012; 8:327-37. [DOI: 10.1002/biot.201200210] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 09/18/2012] [Accepted: 10/08/2012] [Indexed: 11/06/2022]
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Russo L, Zanini S, Giannoni P, Landi E, Villa A, Sandri M, Riccardi C, Quarto R, Doglia SM, Nicotra F, Cipolla L. The influence of plasma technology coupled to chemical grafting on the cell growth compliance of 3D hydroxyapatite scaffolds. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:2727-2738. [PMID: 22875605 DOI: 10.1007/s10856-012-4727-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 07/23/2012] [Indexed: 06/01/2023]
Abstract
The development of advanced materials with biomimetic features in order to elicit desired biological responses and to guarantee tissue biocompatibility is recently gaining attention for tissue engineering applications. Bioceramics, such as hydroxyapatite-based biomaterials are now used in a number of different applications throughout the body, covering all areas of the skeleton, due to their biological and chemical similarity to the inorganic phases of bones. When bioactive sintered hydroxyapatite (HA) is desired, biomolecular modification of these materials is needed. In the present work, we investigated the influence of plasma surface modification coupled to chemical grafting on the cell growth compliance of HA 3D scaffolds.
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Affiliation(s)
- Laura Russo
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
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Haemocompatibility improvement of metallic surfaces by covalent immobilization of heparin–liposomes. Int J Pharm 2012; 432:91-8. [DOI: 10.1016/j.ijpharm.2012.04.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Revised: 04/19/2012] [Accepted: 04/21/2012] [Indexed: 01/24/2023]
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40
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Şaşmazel HT, Manolache S, Gümüşderelioğlu M. Water/O2-Plasma-Assisted Treatment of PCL Membranes for Biosignal Immobilization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:1137-62. [DOI: 10.1163/156856209x444475] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Hilal Türkoğlu Şaşmazel
- a Atılım University, Department of Materials Engineering, Incek, Gölbaşı, 06836 Ankara, Turkey
| | - Sorin Manolache
- b University of Wisconsin-Madison, Center for Plasma-Aided Manufacturing, Madison, WI 53706, USA
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41
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Zhang F, Liu S, Zhang Y, Chi Z, Xu J, Wei Y. A facile approach to surface modification on versatile substrates for biological applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32647g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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42
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Mourtas S, Kastellorizios M, Klepetsanis P, Farsari E, Amanatides E, Mataras D, Pistillo B, Favia P, Sardella E, d’Agostino R, Antimisiaris S. Covalent immobilization of liposomes on plasma functionalized metallic surfaces. Colloids Surf B Biointerfaces 2011; 84:214-20. [DOI: 10.1016/j.colsurfb.2011.01.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Accepted: 01/04/2011] [Indexed: 10/18/2022]
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Jafari R, Tatoulian M, Arefi-Khonsari F. Improvement of the stability of plasma polymerized acrylic acid coating deposited on PS beads in a fluidized bed reactor. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2011.01.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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45
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Yang Z, Tu Q, Wang J, Lei X, He T, Sun H, Huang N. Bioactive Plasma-Polymerized Bipolar Films for Enhanced Endothelial Cell Mobility. Macromol Biosci 2011; 11:797-805. [DOI: 10.1002/mabi.201000474] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 01/18/2011] [Indexed: 01/19/2023]
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Ben-Yoav H, Melamed S, Freeman A, Shacham-Diamand Y, Belkin S. Whole-cell biochips for bio-sensing: integration of live cells and inanimate surfaces. Crit Rev Biotechnol 2010; 31:337-53. [PMID: 21190513 DOI: 10.3109/07388551.2010.532767] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Recent advances in the convergence of the biological, chemical, physical, and engineering sciences have opened new avenues of research into the interfacing of diverse biological moieties with inanimate platforms. A main aspect of this field, the integration of live cells with micro-machined platforms for high throughput and bio-sensing applications, is the subject of the present review. These unique hybrid systems are configured in a manner that ensures positioning of the cells in designated patterns, and enables cellular viability maintenance, and monitoring of cellular functionality. Here we review both animate and inanimate surface properties and how they affect cellular attachment, describe relevant modifications of both types of surfaces, list technologies for platform engineering and for cell deposition in the desired configurations, and discuss the influence of various deposition and immobilization methods on the viability and performance of the immobilized cells.
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Affiliation(s)
- Hadar Ben-Yoav
- Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, Tel-Aviv, Israel
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47
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Popescu MC, Totolin M, Tibirna CM, Sdrobis A, Stevanovic T, Vasile C. Grafting of softwood kraft pulps fibers with fatty acids under cold plasma conditions. Int J Biol Macromol 2010; 48:326-35. [PMID: 21182856 DOI: 10.1016/j.ijbiomac.2010.12.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 12/05/2010] [Accepted: 12/13/2010] [Indexed: 11/26/2022]
Abstract
Cold plasma treatment is used to modify the cellulosic fibers for a variety of applications. The grafting of softwood unbleached (UBP) and bleached (BP) kraft pulp fibers has been performed under the action of cold plasma discharges, using different kinds of fatty acids. The grafted samples are characterized by FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), termogravimetry (TG-DTG) and X-ray diffraction (XRD). All these methods confirm the morphological and structural changes after plasma treatment which determines the modification in cellulosic fiber properties. The active centers created within the cellulose chains by plasma treatment were used to initiate grafting reactions with fatty acids. Such modification is useful to enhance the fibers properties such as softness and to change hydrophilic/hydrophobic balance.
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Affiliation(s)
- Maria-Cristina Popescu
- Petru Poni Institute of Macromolecular Chemistry, Department of Physical Chemistry of Polymers, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
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Wu J, Marí-Buyé N, Muiños TF, Borrós S, Favia P, Semino CE. Nanometric self-assembling peptide layers maintain adult hepatocyte phenotype in sandwich cultures. J Nanobiotechnology 2010; 8:29. [PMID: 21143997 PMCID: PMC3224541 DOI: 10.1186/1477-3155-8-29] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Accepted: 12/12/2010] [Indexed: 01/09/2023] Open
Abstract
Background Isolated hepatocytes removed from their microenvironment soon lose their hepatospecific functions when cultured. Normally hepatocytes are commonly maintained under limited culture medium supply as well as scaffold thickness. Thus, the cells are forced into metabolic stress that degenerate liver specific functions. This study aims to improve hepatospecific activity by creating a platform based on classical collagen sandwich cultures. Results The modified sandwich cultures replace collagen with self-assembling peptide, RAD16-I, combined with functional peptide motifs such as the integrin-binding sequence RGD and the laminin receptor binding sequence YIG to create a cell-instructive scaffold. In this work, we show that a plasma-deposited coating can be used to obtain a peptide layer thickness in the nanometric range, which in combination with the incorporation of functional peptide motifs have a positive effect on the expression of adult hepatocyte markers including albumin, CYP3A2 and HNF4-alpha. Conclusions This study demonstrates the capacity of sandwich cultures with modified instructive self-assembling peptides to promote cell-matrix interaction and the importance of thinner scaffold layers to overcome mass transfer problems. We believe that this bioengineered platform improves the existing hepatocyte culture methods to be used for predictive toxicology and eventually for hepatic assist technologies and future artificial organs.
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Affiliation(s)
- Jonathan Wu
- Center for Biomedical Engineering, Massachusetts Institute of Technology, Boston, MA, USA.
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50
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De Giglio E, Cafagna D, Ricci M, Sabbatini L, Cometa S, Ferretti C, Mattioli-Belmonte M. Biocompatibility of Poly(Acrylic Acid) Thin Coatings Electro-synthesized onto TiAlV-based Implants. J BIOACT COMPAT POL 2010. [DOI: 10.1177/0883911510372290] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The protection of metal orthopedic implants against corrosion is a crucial medical problem. It was found that electrochemical polymerization of thin, passive poly(acrylic acid) (PAA) films on titanium and TiAlV substrates provides good anti-corrosion properties. In this work, an investigation of anti-corrosion features was carried out to clarify the hypothesis of the presence of an electrostatic contribution to the performance of a PAA coating. Ion release tests were performed at three different pHs; the pH dependence of the polymer swelling was examined by quartz crystal microbalance with dissipation monitoring, to establish the role of this phenomenon on the polymer barrier properties. The potential application of these PAA thin films as biocompatible protective coatings for metal implants and compatibility towards MG-63 human osteoblast-like cells was assessed.
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Affiliation(s)
- E. De Giglio
- Department of Chemistry, University of Bari, Bari, Italy
| | - D. Cafagna
- Department of Chemistry, University of Bari, Bari, Italy
| | - M.A. Ricci
- Department of Chemistry, University of Bari, Bari, Italy
| | - L. Sabbatini
- Department of Chemistry, University of Bari, Bari, Italy
| | - S. Cometa
- Laboratory of Bioactive Polymeric Materials for Biomedical & Environmental Applications, Chemistry & Industrial Chemistry Department University of Pisa, Pisa, Italy,
| | - C. Ferretti
- Department of Molecular Pathology and Innovative Therapies Marche Polytechnic University, Ancona, Italy
| | - M. Mattioli-Belmonte
- Department of Molecular Pathology and Innovative Therapies Marche Polytechnic University, Ancona, Italy
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