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Migliorini F, Eschweiler J, Betsch M, Maffulli N, Tingart M, Hildebrand F, Lecouturier S, Rath B, Schenker H. Osteointegration of functionalised high-performance oxide ceramics: imaging from micro-computed tomography. J Orthop Surg Res 2024; 19:411. [PMID: 39026349 PMCID: PMC11256426 DOI: 10.1186/s13018-024-04918-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 07/13/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND This study evaluated the osseointegration potential of functionalised high-performance oxide ceramics (HPOC) in isolation or coated with BMP-2 or RGD peptides in 36 New Zeeland female rabbits using micro-computed tomography (micro CT). The primary outcomes of interest were to assess the amount of ossification evaluating the improvement in the bone volume/ total volume (BV/TV) ratio and trabecular thickness at 6 and 12 weeks. The second outcome of interest was to investigate possible differences in osteointegration between the functionalised silanised HPOC in isolation or coated with Bone Morphogenetic Protein 2 (BMP-2) or RGD peptides. METHODS 36 adult female New Zealand white rabbits with a minimum weight of three kg were used. One-third of HPOCs were functionalised with silicon suboxide (SiOx), a third with BMP-2 (sHPOC-BMP2), and another third with RGD (sHPOC-RGD). All samples were scanned with a high-resolution micro CT (U-CTHR, MILabs B.V., Houten, The Netherlands) with a reconstructed voxel resolution of 10 µm. MicroCT scans were reconstructed in three planes and processed using Imalytics Preclinical version 2.1 (Gremse-IT GmbH, Aachen, Germany) software. The total volume (TV), bone volume (BV) and ratio BV/TV were calculated within the coating area. RESULTS BV/TV increased significantly from 6 to 12 weeks in all HPOCs: silanised (P = 0.01), BMP-2 (P < 0.0001), and RGD (P < 0.0001) groups. At 12 weeks, the BMP-2 groups demonstrated greater ossification in the RGD (P < 0.0001) and silanised (P = 0.008) groups. Trabecular thickness increased significantly from 6 to 12 weeks (P < 0.0001). At 12 weeks, BMP-2 promoted greater trabecular thickness compared to the silanised group (P = 0.07), although no difference was found with the RGD (P = 0.1) group. CONCLUSION Sinalised HPOC in isolation or functionalised with BMP-2 or RGD promotes in vivo osteointegration. The sinalised HOPC functionalised with BMP-2 demonstrated the greatest osseointegration.
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Affiliation(s)
- Filippo Migliorini
- Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany.
- Department of Orthopaedic and Trauma Surgery, Academic Hospital of Bolzano (SABES-ASDAA), 39100, Bolzano, Italy.
- Department of Life Sciences, Health, and Health Professions, Link Campus University, Rome, Italy.
| | - Jörg Eschweiler
- Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Marcel Betsch
- Department of Orthopaedic and Trauma Surgery, University Hospital of Erlangen, 91054, Erlangen, Germany
| | - Nicola Maffulli
- Department of Trauma and Orthopaedic Surgery, Faculty of Medicine and Psychology, University La Sapienza, 00185, Rome, Italy.
- Faculty of Medicine, School of Pharmacy and Bioengineering, Keele University, ST4 7QB, Stoke On Trent, England.
- Queen Mary University of London, Barts and the London School of Medicine and Dentistry, Mile End Hospital, 275 Bancroft Road, E1 4DG, London, England.
| | | | - Frank Hildebrand
- Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Sophie Lecouturier
- Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Björn Rath
- Department of Orthopaedic Surgery, Klinikum Wels-Grieskirchen, 4600, Wels, Austria
| | - Hanno Schenker
- Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074, Aachen, Germany
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Ramezani G, Stiharu I, van de Ven TGM, Nerguizian V. Advancements in Hybrid Cellulose-Based Films: Innovations and Applications in 2D Nano-Delivery Systems. J Funct Biomater 2024; 15:93. [PMID: 38667550 PMCID: PMC11051498 DOI: 10.3390/jfb15040093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/29/2024] [Accepted: 03/31/2024] [Indexed: 04/28/2024] Open
Abstract
This review paper delves into the realm of hybrid cellulose-based materials and their applications in 2D nano-delivery systems. Cellulose, recognized for its biocompatibility, versatility, and renewability, serves as the core matrix for these nanomaterials. The paper offers a comprehensive overview of the latest advancements in the creation, analysis, and application of these materials, emphasizing their significance in nanotechnology and biomedical domains. It further illuminates the integration of nanomaterials and advanced synthesis techniques that have significantly improved the mechanical, chemical, and biological properties of hybrid cellulose-based materials.
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Affiliation(s)
- Ghazaleh Ramezani
- Department of Mechanical, Industrial, and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada;
| | - Ion Stiharu
- Department of Mechanical, Industrial, and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada;
| | - Theo G. M. van de Ven
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada;
| | - Vahe Nerguizian
- Department of Electrical Engineering, École de Technologie Supérieure, 1100 Notre Dame West, Montreal, QC H3C 1K3, Canada;
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Ramachandran B, Sabbatier G, Bowden OM, Campbell K, Fekete N, Girard-Lauriault PL, Hoesli CA. Human mesenchymal stromal cell adhesion and expansion on fluoropolymer surfaces modified with oxygen and nitrogen-rich plasma polymers. Colloids Surf B Biointerfaces 2024; 234:113740. [PMID: 38199188 DOI: 10.1016/j.colsurfb.2023.113740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/12/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024]
Abstract
Fluorinated ethylene propylene (FEP) vessels are of significant interest for therapeutic cell biomanufacturing applications due to their chemical inertness, hydrophobic surface, and high oxygen permeability. However, these properties also limit the adhesion and survival of anchorage-dependent cells. Here, we develop novel plasma polymer coatings to modify FEP surfaces, enhancing the adhesion and expansion of human mesenchymal stromal cells (hMSCs). Similar to commercially available tissue culture polystyrene vessels, oxygen-rich or nitrogen-rich surface chemistries can be achieved using this approach. While steam sterilization increased the roughness of the coatings and altered the surface chemistry, the overall wettability and oxygen or nitrogen-rich nature of the coatings were maintained. In the absence of proteins during initial cell attachment, cells adhered to surfaces even in the presence of chelators, whereas adhesion was abrogated with chelator in a protein-containing medium, suggesting that integrin-mediated adhesion predominates over physicochemical tethering in normal protein-containing cell seeding conditions. Albumin adsorption was more elevated on nitrogen-rich coatings compared to the oxygen-rich coatings, which was correlated with a higher extent of hMSC expansion after 3 days. Both the oxygen and nitrogen-rich coatings significantly improved hMSC adhesion and expansion compared to untreated FEP. FEP surfaces with nitrogen-rich coatings were practically equivalent to commercially available standard tissue culture-treated polystyrene surfaces in terms of hMSC yields. Plasma polymer coatings show significant promise in expanding the potential usage of FEP-based culture vessels for cell therapy applications.
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Affiliation(s)
| | - Gad Sabbatier
- Department of Chemical Engineering, McGill University, Montréal, Canada
| | - Olivia M Bowden
- Department of Chemical Engineering, McGill University, Montréal, Canada
| | - Katie Campbell
- Saint-Gobain Ceramics & Plastics, Inc., Northboro R&D Center, Northborough, MA, USA
| | - Natalie Fekete
- Saint-Gobain Ceramics & Plastics, Inc., Northboro R&D Center, Northborough, MA, USA
| | | | - Corinne A Hoesli
- Department of Chemical Engineering, McGill University, Montréal, Canada.
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Vishnu J, Kesavan P, Shankar B, Dembińska K, Swiontek Brzezinska M, Kaczmarek-Szczepańska B. Engineering Antioxidant Surfaces for Titanium-Based Metallic Biomaterials. J Funct Biomater 2023; 14:344. [PMID: 37504839 PMCID: PMC10381466 DOI: 10.3390/jfb14070344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/21/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023] Open
Abstract
Prolonged inflammation induced by orthopedic metallic implants can critically affect the success rates, which can even lead to aseptic loosening and consequent implant failure. In the case of adverse clinical conditions involving osteoporosis, orthopedic trauma and implant corrosion-wear in peri-implant region, the reactive oxygen species (ROS) activity is enhanced which leads to increased oxidative stress. Metallic implant materials (such as titanium and its alloys) can induce increased amount of ROS, thereby critically influencing the healing process. This will consequently affect the bone remodeling process and increase healing time. The current review explores the ROS generation aspects associated with Ti-based metallic biomaterials and the various surface modification strategies developed specifically to improve antioxidant aspects of Ti surfaces. The initial part of this review explores the ROS generation associated with Ti implant materials and the associated ROS metabolism resulting in the formation of superoxide anion, hydroxyl radical and hydrogen peroxide radicals. This is followed by a comprehensive overview of various organic and inorganic coatings/materials for effective antioxidant surfaces and outlook in this research direction. Overall, this review highlights the critical need to consider the aspects of ROS generation as well as oxidative stress while designing an implant material and its effective surface engineering.
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Affiliation(s)
- Jithin Vishnu
- Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana 690525, India
| | - Praveenkumar Kesavan
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Balakrishnan Shankar
- Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana 690525, India
| | - Katarzyna Dembińska
- Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| | - Maria Swiontek Brzezinska
- Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| | - Beata Kaczmarek-Szczepańska
- Department of Biomaterials and Cosmetic Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
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Song Q, Zhu M, Shi Y, Smay J, Mao Y. Surface Tailoring of 3D Scaffolds to Promote Osteogenic Differentiation. ACS APPLIED BIO MATERIALS 2023; 6:891-898. [PMID: 36749952 DOI: 10.1021/acsabm.2c01036] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Customized bone scaffolds with osteogenic activities are desired for the regenerative repair of large-scale or irregularly shaped bone defects. This study developed a facile method to create osteogenic surfaces on three-dimensional (3D) printed scaffolds through coating-induced mineralization. The coating was synthesized using chemical vapor deposition of a polyelectrolyte containing oppositely charged groups. The opposite charges on the 3D scaffold played a crucial role in promoting the formation of nanoapatites without agglomeration, resulting in the retention of micro- and nanoscale pore openings needed for preosteoblasts to proliferate, differentiate, and migrate. The nanoapatite scaffold exhibited significant enhancement in osteoinductivity with a 107% increase in alkaline phosphatase expression and a 163% increase in osteocalcin activity compared to the pristine scaffold. The nanoapatite scaffold provided cues for preosteoblasts to grow along aligned features and migrate collectively. The findings of this study demonstrate the synergistic effect of oppositely charged polyelectrolytes and mineralized nanoapatites on promoting osteogenic activities on scaffold surfaces.
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Affiliation(s)
- Qing Song
- Department of Biosystems Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Mengfan Zhu
- Department of Biosystems Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Yang Shi
- Department of Materials Science and Engineering, Oklahoma State University, Tulsa, Oklahoma 74106, United States
| | - James Smay
- Department of Materials Science and Engineering, Oklahoma State University, Tulsa, Oklahoma 74106, United States
| | - Yu Mao
- Department of Biosystems Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
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Zhu X, Wang X, Liu Y, Luo Y, Liu Y, Zhang H, Zhao X. Effect of the Graphitization Mechanism on the Friction and Wear Behavior of DLC Films Based on Molecular Dynamics Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1905-1913. [PMID: 36700881 DOI: 10.1021/acs.langmuir.2c02925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Whether a graphitization mechanism can control the low-friction behavior of DLC films is still controversial. In this paper, we establish the molecular dynamics model of the DLC film with graphene (DLC-GR-DLC) by LAMMPS and study the influence of the graphitization mechanism on the friction and wear behavior of the DLC film. The friction force of the DLC-GR-DLC model in the running-in stage is significantly smaller than that of the DLC film and then gradually increases to the same size as that of the DLC film. Further analysis indicates that the graphitization mechanism could indeed reduce the shear stress of the friction interface when graphene remains intact. However, the curling and breaking of the graphene structure will lead to an increase in shear force at the friction interface.
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Affiliation(s)
- Xiaohua Zhu
- School of Mechatronic Engineering, Southwest Petroleum University, Chengdu610500, China
| | - Xiaowen Wang
- School of Mechatronic Engineering, Southwest Petroleum University, Chengdu610500, China
| | - Yunhai Liu
- School of Mechatronic Engineering, Southwest Petroleum University, Chengdu610500, China
| | - Yiyao Luo
- School of Mechatronic Engineering, Southwest Petroleum University, Chengdu610500, China
| | - Yi Liu
- School of Mechatronic Engineering, Southwest Petroleum University, Chengdu610500, China
| | - Hu Zhang
- School of Mechatronic Engineering, Southwest Petroleum University, Chengdu610500, China
| | - Xiao Zhao
- Pipechina Guizhou Pipeline Co., Ltd., Guiyang550081, China
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Migliorini F, Schenker H, Betsch M, Maffulli N, Tingart M, Hildebrand F, Lecouturier S, Rath B, Eschweiler J. Silica coated high performance oxide ceramics promote greater ossification than titanium implants: an in vivo study. J Orthop Surg Res 2023; 18:31. [PMID: 36631843 PMCID: PMC9832611 DOI: 10.1186/s13018-022-03494-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 12/30/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND This in vitro study investigated the osseointegration and implant integration of high performance oxide ceramics (HPOC) compared to titanium implants in rabbits. METHODS Histomorphometry was conducted around the distal, proximal, medial, and lateral aspects of the HPOC to quantify the amount of mature and immature ossification within the bone interface. Histomorphometry was conducted by a trained musculoskeletal pathologist. The region of interest (ROI) represented the percentage of surrounding area of the implant. The percentage of ROI covered by osteoid implant contact (OIC) and mature bone implant contact (BIC) were assessed. The surrounding presence of bone resorption, necrosis, and/or inflammation were quantitatively investigated. RESULTS All 34 rabbits survived the 6- and 12-week experimental period. All HPOC implants remained in situ. The mean weight difference from baseline was + 647.7 mg (P < 0.0001). The overall OIC of the ceramic group was greater at 6 weeks compared to the titanium implants (P = 0.003). The other endpoints of interest were similar between the two implants at all follow-up points. No difference was found in BIC at 6- and 12-weeks follow-up. No bone necrosis, resorption, or inflammation were observed. CONCLUSION HPOC implants demonstrated a greater osteoid implant contact at 6 weeks compared to the titanium implants, with no difference found at 12 weeks. The percentage of bone implant contact of HPOC implants was similar to that promoted by titanium implants.
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Affiliation(s)
- Filippo Migliorini
- grid.412301.50000 0000 8653 1507Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074 Aachen, Germany ,Department of Orthopaedic and Trauma Surgery, Eifelklinik St. Brigida, 52152 Simmerath, Germany
| | - Hanno Schenker
- grid.412301.50000 0000 8653 1507Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Marcel Betsch
- grid.411668.c0000 0000 9935 6525Department of Orthopedics, University Hospital of Erlangen, 91054 Erlangen, Germany
| | - Nicola Maffulli
- grid.11780.3f0000 0004 1937 0335Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Baronissi, SA Italy ,grid.9757.c0000 0004 0415 6205Faculty of Medicine, School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, ST4 7QB UK ,grid.4868.20000 0001 2171 1133Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Mile End Hospital, 275 Bancroft Road, London, E1 4DG UK
| | | | - Frank Hildebrand
- grid.412301.50000 0000 8653 1507Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Sophie Lecouturier
- grid.412301.50000 0000 8653 1507Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Björn Rath
- grid.459707.80000 0004 0522 7001Department of Orthopaedic Surgery, Klinikum Wels-Grieskirchen, 4600 Wels, Austria
| | - Jörg Eschweiler
- grid.412301.50000 0000 8653 1507Department of Orthopaedic, Trauma, and Reconstructive Surgery, RWTH University Hospital, Pauwelsstraße 30, 52074 Aachen, Germany
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Shukla A, Das D, Sen K. Electrically‐assisted chemical vapor polymerization: A novel method for in situ polymerization of pyrrole. J Appl Polym Sci 2022. [DOI: 10.1002/app.53443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ankur Shukla
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi India
| | - Dipayan Das
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi India
| | - Kushal Sen
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi India
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Classification, Synthetic, and Characterization Approaches to Nanoparticles, and Their Applications in Various Fields of Nanotechnology: A Review. Catalysts 2022. [DOI: 10.3390/catal12111386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Nanoparticles typically have dimensions of less than 100 nm. Scientists around the world have recently become interested in nanotechnology because of its potential applications in a wide range of fields, including catalysis, gas sensing, renewable energy, electronics, medicine, diagnostics, medication delivery, cosmetics, the construction industry, and the food industry. The sizes and forms of nanoparticles (NPs) are the primary determinants of their properties. Nanoparticles’ unique characteristics may be explored for use in electronics (transistors, LEDs, reusable catalysts), energy (oil recovery), medicine (imaging, tumor detection, drug administration), and more. For the aforementioned applications, the synthesis of nanoparticles with an appropriate size, structure, monodispersity, and morphology is essential. New procedures have been developed in nanotechnology that are safe for the environment and can be used to reliably create nanoparticles and nanomaterials. This research aims to illustrate top-down and bottom-up strategies for nanomaterial production, and numerous characterization methodologies, nanoparticle features, and sector-specific applications of nanotechnology.
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Rawat S, Misra N, Meena SS, Shelkar SS, Kumar N N, Goel NK, Kumar V. Plasma polymerized functional supermagnetic Fe 3O 4 nanostructured templates for laccase immobilization: A robust catalytic system for bio-inspired dye degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:82524-82540. [PMID: 35752670 DOI: 10.1007/s11356-022-21539-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
Fe3O4 magnetic nanoparticles, synthesized using co-precipitation method, were epoxy functionalized via plasma polymerization of 2,3-epoxypropylmethacrylate (EPMA) precursor. The EPMA-functionalized Fe3O4 nanoparticles (EPMA-f-MN) were employed as templates for facile, one-step covalent immobilization of laccase enzyme at room temperature. Samples were rigorously characterized by FTIR, TGA, SEM, TEM, XRD techniques, while Mössbauer spectroscopy (MöS) and vibrating sample magnetometry (VSM) confirmed the supermagnetic nature of Fe3O4 nanoparticles. Activities of free and immobilized laccase (ImLac) were assayed by spectrophotometrically monitoring the enzymatic reduction of substrate 2,2-azino-bis(3-ethylthiazoline-6-sulfonate) (ABTS) at 420 nm, corresponding to the λmax of ABTS.+. In addition to possessing higher thermal stability and a broader pH tolerance window compared to free laccase, the supermagnetic property of the Fe3O4 renders the ImLac system conveniently recoverable and recyclable. Practical applicability of ImLac towards catalytic degradation of industrial dyes was also ably demonstrated using Acid Blue 193 (AB 193) as a commercially used model textile dye, which belongs to the family of azo dyes. Over 95% degradation of the dye was achieved within a period of 4 hours. ImLac could be used for more than 10 dye degradation cycles with >90 % of retention in enzyme activity.
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Affiliation(s)
- Swarnima Rawat
- Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Nilanjal Misra
- Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Sher Singh Meena
- Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Shubhangi S Shelkar
- Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Naveen Kumar N
- Materials Science Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Narender Kumar Goel
- Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Virendra Kumar
- Radiation Technology Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India.
- Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
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11
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Simulation of the First Two Microseconds of an Ar CCP Cold Plasma Discharge by the PIC-MCC Method. PLASMA 2022. [DOI: 10.3390/plasma5030028] [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
Most simulations of capacitively coupled radiofrequency cold-plasma discharges (RF-CCP) are focused on the steady state, but the initial discharge time is important for understanding the ignition process and the behavior of pulsed discharges. In this work, the time evolution of an RF-CCP Ar discharge was simulated, considering a pressure of 66.6 Pa, a distance between the electrodes of 20 mm, and RF (13.56 MHz) bias amplitudes in range 100–400 V, and the discharge evolution was observed for the first 2 μs. A 1d3v (1 dimension for particle positions and 3 dimensions for particle velocities) electrostatic particle in cell with montecarlo collisions (PIC-MCC) model was used, with separated particle weights for electrons and ions that varied with the particle density. During the simulations, the time evolution of the electron density, mean electron energy, Debye length, Debye number, and plasma frequency were observed. The spatial distribution of electric potential and the electron energy distribution function were also monitored. A transition between two regimes was observed; the first was characterized by strong oscillation of the mean electron energy and an exponential increase of the mean plasma density with time, while in the second the mean electron energy was lower, and the plasma density increased linearly. The time required for the transition between the two regimes increased as the RF amplitude was raised from 100 to 250 V, then decreased with a further increase of the RF amplitude to 300 and 350 V.
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Cho C, Kim S, Lee Y, Jeong W, Seong I, Lee J, Choi M, You Y, Lee S, Lee J, You S. Refined Appearance Potential Mass Spectrometry for High Precision Radical Density Quantification in Plasma. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22176589. [PMID: 36081045 PMCID: PMC9460062 DOI: 10.3390/s22176589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/28/2022] [Accepted: 08/29/2022] [Indexed: 06/02/2023]
Abstract
As the analysis of complicated reaction chemistry in bulk plasma has become more important, especially in plasma processing, quantifying radical density is now in focus. For this work, appearance potential mass spectrometry (APMS) is widely used; however, the original APMS can produce large errors depending on the fitting process, as the fitting range is not exactly defined. In this research, to reduce errors resulting from the fitting process of the original method, a new APMS approach that eliminates the fitting process is suggested. Comparing the neutral densities in He plasma between the conventional method and the new method, along with the real neutral density obtained using the ideal gas equation, confirmed that the proposed quantification approach can provide more accurate results. This research will contribute to improving the precision of plasma diagnosis and help elucidate the plasma etching process.
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Affiliation(s)
- Chulhee Cho
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Sijun Kim
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Youngseok Lee
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Wonnyoung Jeong
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Inho Seong
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Jangjae Lee
- Samsung Electronics, Samsungjeonja-ro, Hwaseong-si 18448, Korea
| | - Minsu Choi
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Yebin You
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Sangho Lee
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
- Korea Institute of Machinery & Materials, 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, Korea
| | - Jinho Lee
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Shinjae You
- Department of Physics, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
- Institute of Quantum System (IQS), Chungnam National University, Daejeon 34134, Korea
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13
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Kim SJ, Seong IH, Lee YS, Cho CH, Jeong WN, You YB, Lee JJ, You SJ. Development of a High-Linearity Voltage and Current Probe with a Floating Toroidal Coil: Principle, Demonstration, Design Optimization, and Evaluation. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22155871. [PMID: 35957427 PMCID: PMC9371410 DOI: 10.3390/s22155871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/28/2022] [Accepted: 08/04/2022] [Indexed: 05/27/2023]
Abstract
As the conventional voltage and current (VI) probes widely used in plasma diagnostics have separate voltage and current sensors, crosstalk between the sensors leads to degradation of measurement linearity, which is related to practical accuracy. Here, we propose a VI probe with a floating toroidal coil that plays both roles of a voltage and current sensor and is thus free from crosstalk. The operation principle and optimization conditions of the VI probe are demonstrated and established via three-dimensional electromagnetic wave simulation. Based on the optimization results, the proposed VI probe is fabricated and calibrated for the root-mean-square (RMS) voltage and current with a high-voltage probe and a vector network analyzer. Then, it is evaluated through a comparison with a commercial VI probe, with the results demonstrating that the fabricated VI probe achieved a slightly higher linearity than the commercial probe: R2 of 0.9967 and 0.9938 for RMS voltage and current, respectively. The proposed VI probe is believed to be applicable to plasma diagnostics as well as process monitoring with higher accuracy.
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Affiliation(s)
- Si-jun Kim
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
| | - In-ho Seong
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
| | - Young-seok Lee
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
| | - Chul-hee Cho
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
| | - Won-nyoung Jeong
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
| | - Ye-bin You
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
| | | | - Shin-jae You
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea
- Institute of Quantum Systems (IQS), Chungnam National University, Daejeon 34134, Korea
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14
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Agarwal PPK, Matsoukas T. Enhanced Energetic Performance of Aluminum Nanoparticles by Plasma Deposition of Perfluorinated Nanofilms. ACS APPLIED MATERIALS & INTERFACES 2022; 14:35255-35264. [PMID: 35862005 DOI: 10.1021/acsami.2c08300] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The performance of Al as nanoenergetic material in solid fuel propulsion or additive in liquid fuels is limited by the presence of the native oxide layer at the surface, which represents a significant weight fraction, does not contribute to heat release during oxidation, and acts as a diffusion barrier to Al oxidation. We develop an efficient technique in which the oxide layer is effectively turned into an energetic component via a reaction with fluorine that is coated in the form of a fluorocarbon nanofilm on the Al surface by plasma-enhanced chemical vapor deposition. Perfluorodecalin vapors are introduced in a low-pressure plasma reactor to produce nanofilms on the surface of Al nanoparticles, whose thickness is controlled with nanolevel precision as demonstrated by high-resolution transmission electron microscopy images. Coated particles show superior heat release, with a maximum enhancement of 50% at a thickness of 10 nm. This significant improvement is attributed to the chemical interaction between Al2O3 and F to form AlF3, which removes the oxide barrier via an exothermic reaction and contributes to the amount of heat released during thermal oxidation. The chemistry and mechanism of the enhancement effect of the plasma nanofilms are explained with the help of X-ray photoelectron spectroscopy, X-ray diffraction, high-angle annular dark-field scanning transmission electron microscopy-energy dispersive spectroscopy, thermogravimetric analysis, and differential scanning calorimetry.
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Affiliation(s)
- Prawal P K Agarwal
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Themis Matsoukas
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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15
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Abstract
Nanomaterials are promising in the development of innovative therapeutic options that include tissue and organ replacement, as well as bone repair and regeneration. The expansion of new nanoscaled biomaterials is based on progress in the field of nanotechnologies, material sciences, and biomedicine. In recent decades, nanomaterial systems have bridged the line between the synthetic and natural worlds, leading to the emergence of a new science called nanomaterial design for biological applications. Nanomaterials replicating bone properties and providing unique functions help in bone tissue engineering. This review article is focused on nanomaterials utilized in or being explored for the purpose of bone repair and regeneration. After a brief overview of bone biology, including a description of bone cells, matrix, and development, nanostructured materials and different types of nanoparticles are discussed in detail.
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Migliorini F, Eschweiler J, Maffulli N, Hildebrand F, Schenker H. Functionalised High-Performance Oxide Ceramics with Bone Morphogenic Protein 2 (BMP-2) Induced Ossification: An In Vivo Study. Life (Basel) 2022; 12:life12060866. [PMID: 35743897 PMCID: PMC9227568 DOI: 10.3390/life12060866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 06/06/2022] [Accepted: 06/08/2022] [Indexed: 11/16/2022] Open
Abstract
This study investigated the in vivo osseointegration potential of high-performance oxide ceramics (HPOCs) with peptide bone morphogenic protein 2 (BMP-2), comparing them with titanium implants. Histomorphometry was conducted around the distal, proximal, medial, and lateral sides of the implants to quantify the amount of mature and immature ossification within the bone interface. We hypothesised that HPOCs functionalised with BMP-2 promote ossification. HPOCs functionalised with BMP-2 were manufactured at the Department of Dental Materials Science and Biomaterial Research of the RWTH University Aachen, Germany. Histomorphometry was conducted by a professional pathologist in all samples. The region of interest (ROI) represented the percentage of the surrounding area of the implant. The percentages of ROI covered by osteoid implant contact (OIC) and mature bone−implant contact (BIC) were assessed. The surrounding presence of bone resorption, necrosis, and/or inflammation was quantitatively investigated. A total of 36 rabbits were used for the experiments. No bone resorption, necrosis, or inflammation was found in any sample. At the 12-week follow-up, the overall BIC was significantly increased (p < 0.0001). No improvement was evidenced in OIC (p = 0.6). At the 6-week follow-up, the overall OIC was greater in the BMP-2 compared to the titanium group (p = 0.002). The other endpoints of interest evidenced similarity between the two implants at various follow-up time points (p > 0.05). In conclusion, alumina HPOCs functionalised with peptide BMP-2 promote in vivo ossification in a similar fashion to titanium implants.
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Affiliation(s)
- Filippo Migliorini
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (J.E.); (F.H.); (H.S.)
| | - Jörg Eschweiler
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (J.E.); (F.H.); (H.S.)
| | - Nicola Maffulli
- Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Baronissi, Italy
- School of Pharmacy and Bioengineering, Faculty of Medicine, Keele University, Stoke-on-Trent ST4 7QB, UK
- Centre for Sports and Exercise Medicine, Mile End Hospital, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 4DG, UK
- Correspondence:
| | - Frank Hildebrand
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (J.E.); (F.H.); (H.S.)
| | - Hanno Schenker
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (J.E.); (F.H.); (H.S.)
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Migliorini F, Schenker H, Maffulli N, Hildebrand F, Eschweiler J. Histomorphometry of Ossification in Functionalised Ceramics with Tripeptide Arg-Gly-Asp (RGD): An In Vivo Study. Life (Basel) 2022; 12:life12050761. [PMID: 35629427 PMCID: PMC9146276 DOI: 10.3390/life12050761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/16/2022] [Accepted: 05/16/2022] [Indexed: 12/31/2022] Open
Abstract
The present study investigated the osseointegration promoted by functionalised ceramics with peptide Arg-Gly-Asp (RGD) in a rabbit model in vivo. Histomorphometry of the RGD functionalised ceramic implants was conducted by a trained pathologist to quantify the amount of mature and immature ossification at the bone interface, and then compared to titanium alloy implants. The region of interest was the area surrounding the implant. The percentage of ROI covered by osteoid implant contact and mature bone implant contact were assessed. The presence of bone resorption, necrosis, and/or inflammation in the areas around the implant were quantitatively investigated. All 36 rabbits survived the experimental period of 6 and 12 weeks. All implants remained in situ. No necrosis, bone resorption, or inflammation were identified. At 12 weeks follow-up, the overall mean bone implant contact (p = 0.003) and immature osteoid contact (p = 0.03) were improved compared to the mean values evidenced at 6 weeks. At 6 weeks follow-up, the overall osteoid implant contact was greater in the RGD enhanced group compared to the titanium implant (p = 0.01). The other endpoints of interest were similar between the two implants at all follow-up points (p ≥ 0.05). Functionalised ceramics with peptide RGD promoted ossification in vivo. The overall osteoid and bone implant contact improved significantly from 6 to 12 weeks. Finally, RGD enhanced ceramic promoted faster osteoid implant contact in vivo than titanium implants. Overall, the amount of ossification at 12 weeks is comparable with the titanium implants. No necrosis, bone resorption, or inflammation were observed in any sample.
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Affiliation(s)
- Filippo Migliorini
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (H.S.); (F.H.); (J.E.)
| | - Hanno Schenker
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (H.S.); (F.H.); (J.E.)
| | - Nicola Maffulli
- Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Baronissi, Italy
- School of Pharmacy and Bioengineering, Keele University Faculty of Medicine, Stoke on Trent ST4 7QB, UK
- Barts and The London School of Medicine and Dentistry, Centre for Sports and Exercise Medicine, Mile End Hospital, Queen Mary University of London, London E1 4DG, UK
- Correspondence:
| | - Frank Hildebrand
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (H.S.); (F.H.); (J.E.)
| | - Jörg Eschweiler
- Department of Orthopaedic, Trauma and Reconstructive Surgery, RWTH University Hospital, 52074 Aachen, Germany; (F.M.); (H.S.); (F.H.); (J.E.)
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18
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A Literature Review of Modelling and Experimental Studies of Water Treatment by Adsorption Processes on Nanomaterials. MEMBRANES 2022; 12:membranes12040360. [PMID: 35448329 PMCID: PMC9029349 DOI: 10.3390/membranes12040360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 02/04/2023]
Abstract
A significant growth in the future demand for water resources is expected. Hence researchers have focused on finding new technologies to develop water filtration systems by using experimental and simulation methods. These developments were mainly on membrane-based separation technology, and photocatalytic degradation of organic pollutants which play an important role in wastewater treatment by means of adsorption technology. In this work, we provide valuable critical review of the latest experimental and simulation methods on wastewater treatment by adsorption on nanomaterials for the removal of pollutants. First, we review the wastewater treatment processes that were carried out using membranes and nanoparticles. These processes are highlighted and discussed in detail according to the rate of pollutant expulsion, the adsorption capacity, and the effect of adsorption on nanoscale surfaces. Then we review the role of the adsorption process in the photocatalytic degradation of pollutants in wastewater. We summarise the comparison based on decomposition ratios and degradation efficiency of pollutants. Therefore, the present article gives an evidence-based review of the rapid development of experimental and theoretical studies on wastewater treatment by adsorption processes. Lastly, the future direction of adsorption methods on water filtration processes is indicated.
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Kao CH, Liao YC, Chuang CC, Huang YH, Lee CH, Chen SM, Lee ML, Chen H. Influence of Y Doping on WO3 Membranes Applied in Electrolyte-Insulator-Semiconductor Structures. MEMBRANES 2022; 12:membranes12030328. [PMID: 35323803 PMCID: PMC8954489 DOI: 10.3390/membranes12030328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 03/07/2022] [Accepted: 03/10/2022] [Indexed: 11/17/2022]
Abstract
In this paper, tungsten oxide (WO3) is deposited on a silicon substrate applied in electrolyte-insulator-semiconductor structures for pH sensing devices. To boost the sensing performance, yttrium (Y) is doped into WO3 membranes, and annealing is incorporated in the fabrication process. To investigate the effects of Y doping and annealing, multiple material characterizations including X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atom force microscopy (AFM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) are performed. Material analysis results indicate that annealing and Y doping can increase crystallinity, suppress defects, and enhance grainization, thereby strengthening membrane sensing capabilities in terms of sensitivity, linearity, and reliability. Because of their stable response, high reliability, and compact size, Y-doped WO3 membranes are promising for future biomedical applications.
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Affiliation(s)
- Chyuan-Haur Kao
- Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan District, Taoyuan City 333, Taiwan; (C.-H.K.); (Y.-C.L.)
- Kidney Research Center, Department of Nephrology, Chang Gung Memorial Hospital, Chang Gung University, No. 5 Fuxing St., Guishan District, Taoyuan City 333, Taiwan
- Department of Electronic Engineering, Ming Chi University of Technology, 284 Gungjuan Rd., Taishan District, New Taipei City 243, Taiwan
| | - Yu-Ching Liao
- Department of Electronic Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan District, Taoyuan City 333, Taiwan; (C.-H.K.); (Y.-C.L.)
| | - Chi-Chih Chuang
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Puli Nantou 545, Taiwan; (C.-C.C.); (Y.-H.H.); (C.-H.L.); (S.-M.C.)
| | - Yi-Hsuan Huang
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Puli Nantou 545, Taiwan; (C.-C.C.); (Y.-H.H.); (C.-H.L.); (S.-M.C.)
| | - Chang-Hsueh Lee
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Puli Nantou 545, Taiwan; (C.-C.C.); (Y.-H.H.); (C.-H.L.); (S.-M.C.)
| | - Shih-Ming Chen
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Puli Nantou 545, Taiwan; (C.-C.C.); (Y.-H.H.); (C.-H.L.); (S.-M.C.)
| | - Ming-Ling Lee
- Department of Electro-Optical Engineering, Minghsin University of Science and Technology, No. 1, Xinxing Rd., Xinfeng, Hsinchu 304, Taiwan
- Correspondence: (M.-L.L.); (H.C.)
| | - Hsiang Chen
- Department of Applied Materials and Optoelectronic Engineering, National Chi Nan University, Puli Nantou 545, Taiwan; (C.-C.C.); (Y.-H.H.); (C.-H.L.); (S.-M.C.)
- Correspondence: (M.-L.L.); (H.C.)
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20
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Gautam S, Bhatnagar D, Bansal D, Batra H, Goyal N. Recent advancements in nanomaterials for biomedical implants. BIOMEDICAL ENGINEERING ADVANCES 2022. [DOI: 10.1016/j.bea.2022.100029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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21
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Kim SJ, Lee JJ, Lee YS, Cho CH, You SJ. Crossing Frequency Method Applicable to Intermediate Pressure Plasma Diagnostics Using the Cutoff Probe. SENSORS 2022; 22:s22031291. [PMID: 35162035 PMCID: PMC8838313 DOI: 10.3390/s22031291] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 02/04/2023]
Abstract
Although the recently developed cutoff probe is a promising tool to precisely infer plasma electron density by measuring the cutoff frequency (fcutoff) in the S21 spectrum, it is currently only applicable to low-pressure plasma diagnostics below several torr. To improve the cutoff probe, this paper proposes a novel method to measure the crossing frequency (fcross), which is applicable to high-pressure plasma diagnostics where the conventional fcutoff method does not operate. Here, fcross is the frequency where the S21 spectra in vacuum and plasma conditions cross each other. This paper demonstrates the fcross method through three-dimensional electromagnetic wave simulation as well as experiments in a capacitively coupled plasma source. Results demonstrate that the method operates well at high pressure (several tens of torr) as well as low pressure. In addition, through circuit model analysis, a method to estimate electron density from fcross is discussed. It is believed that the proposed method expands the operating range of the cutoff probe and thus contributes to its further development.
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Affiliation(s)
- Si-jun Kim
- Nanotech Optoelectronics Research Center, Yongin 16882, Korea;
| | - Jang-jae Lee
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea; (J.-j.L.); (Y.-s.L.); (C.-h.C.)
| | - Young-seok Lee
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea; (J.-j.L.); (Y.-s.L.); (C.-h.C.)
| | - Chul-hee Cho
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea; (J.-j.L.); (Y.-s.L.); (C.-h.C.)
| | - Shin-jae You
- Applied Physics Lab for PLasma Engineering (APPLE), Department of Physics, Chungnam National University, Daejeon 34134, Korea; (J.-j.L.); (Y.-s.L.); (C.-h.C.)
- Institute of Quantum Systems (IQS), Chungnam National University, Daejeon 34134, Korea
- Correspondence:
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22
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Hage M, Khelissa S, Akoum H, Chihib NE, Jama C. Cold plasma surface treatments to prevent biofilm formation in food industries and medical sectors. Appl Microbiol Biotechnol 2022; 106:81-100. [PMID: 34889984 PMCID: PMC8661349 DOI: 10.1007/s00253-021-11715-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 11/19/2021] [Accepted: 11/24/2021] [Indexed: 10/28/2022]
Abstract
Environmental conditions in food and medical fields enable the bacteria to attach and grow on surfaces leading to resistant bacterial biofilm formation. Indeed, the first step in biofilm formation is the bacterial irreversible adhesion. Controlling and inhibiting this adhesion is a passive approach to fight against biofilm development. This strategy is an interesting path in the inhibition of biofilm formation since it targets the first step of biofilm development. Those pathogenic structures are responsible for several foodborne diseases and nosocomial infections. Therefore, to face this public health threat, researchers employed cold plasma technologies in coating development. In this review, the different factors influencing the bacterial adhesion to a substrate are outlined. The goal is to present the passive coating strategies aiming to prevent biofilm formation via cold plasma treatments, highlighting antiadhesive elaborated surfaces. General aspects of surface treatment, including physico-chemical modification and application of cold plasma technologies, were also presented. KEY POINTS: • Factors surrounding pathogenic bacteria influence biofilm development. • Controlling bacterial adhesion prevents biofilm formation. • Materials can be coated via cold plasma to inhibit bacterial adhesion.
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Affiliation(s)
- Mayssane Hage
- UMR 8207 - UMET - Unité Matériaux Et Transformations, Univ. Lille, CNRS, INRAE, Centrale Lille, 59000, Lille, France
- Laboratoire d'analyses Chimiques Et Microbiologiques, Faculté de Santé Publique - Université Libanaise, Saida, Lebanon
| | - Simon Khelissa
- UMR 8207 - UMET - Unité Matériaux Et Transformations, Univ. Lille, CNRS, INRAE, Centrale Lille, 59000, Lille, France
| | - Hikmat Akoum
- Laboratoire d'analyses Chimiques Et Microbiologiques, Faculté de Santé Publique - Université Libanaise, Saida, Lebanon
| | - Nour-Eddine Chihib
- UMR 8207 - UMET - Unité Matériaux Et Transformations, Univ. Lille, CNRS, INRAE, Centrale Lille, 59000, Lille, France
| | - Charafeddine Jama
- UMR 8207 - UMET - Unité Matériaux Et Transformations, Univ. Lille, CNRS, INRAE, Centrale Lille, 59000, Lille, France.
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23
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Riley PR, Joshi P, Azizi Machekposhti S, Sachan R, Narayan J, Narayan RJ. Enhanced Vapor Transmission Barrier Properties via Silicon-Incorporated Diamond-Like Carbon Coating. Polymers (Basel) 2021; 13:polym13203543. [PMID: 34685307 PMCID: PMC8537770 DOI: 10.3390/polym13203543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 01/20/2023] Open
Abstract
In this study, we describe reducing the moisture vapor transmission through a commercial polymer bag material using a silicon-incorporated diamond-like carbon (Si-DLC) coating that was deposited using plasma-enhanced chemical vapor deposition. The structure of the Si-DLC coating was analyzed using scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, selective area electron diffraction, and electron energy loss spectroscopy. Moisture vapor transmission rate (MVTR) testing was used to understand the moisture transmission barrier properties of Si-DLC-coated polymer bag material; the MVTR values decreased from 10.10 g/m2 24 h for the as-received polymer bag material to 6.31 g/m2 24 h for the Si-DLC-coated polymer bag material. Water stability tests were conducted to understand the resistance of the Si-DLC coatings toward moisture; the results confirmed the stability of Si-DLC coatings in contact with water up to 100 °C for 4 h. A peel-off adhesion test using scotch tape indicated that the good adhesion of the Si-DLC film to the substrate was preserved in contact with water up to 100 °C for 4 h.
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Affiliation(s)
- Parand R. Riley
- Department of Materials Science and Engineering, Centennial Campus, North Carolina State University, Raleigh, NC 27695-7907, USA; (P.R.R.); (P.J.); (J.N.)
| | - Pratik Joshi
- Department of Materials Science and Engineering, Centennial Campus, North Carolina State University, Raleigh, NC 27695-7907, USA; (P.R.R.); (P.J.); (J.N.)
| | - Sina Azizi Machekposhti
- Joint Department of Biomedical Engineering, Centennial Campus, North Carolina State University, Raleigh, NC 27695-7115, USA;
| | - Ritesh Sachan
- Department of Mechanical Engineering, Oklahoma State University, Stillwater, OK 74078, USA;
| | - Jagdish Narayan
- Department of Materials Science and Engineering, Centennial Campus, North Carolina State University, Raleigh, NC 27695-7907, USA; (P.R.R.); (P.J.); (J.N.)
| | - Roger J. Narayan
- Joint Department of Biomedical Engineering, Centennial Campus, North Carolina State University, Raleigh, NC 27695-7115, USA;
- Correspondence:
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24
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Gürsoy M. Fabrication of Paper-Based Microfluidic Devices Using PECVD for Selective Separation. Macromol Res 2021. [DOI: 10.1007/s13233-021-9050-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Morelli A, Hawker MJ. Utilizing Radio Frequency Plasma Treatment to Modify Polymeric Materials for Biomedical Applications. ACS Biomater Sci Eng 2021. [PMID: 33913325 DOI: 10.1021/acsbiomaterials.0c01673] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Studies that utilize radio frequency plasma modification as a strategy to tune the surface properties of polymeric constructs with the goal of enhancing their use as biomedical devices have grown considerably in number over the past decade. In this Review, we present the importance of plasma surface treatment to biomedical applications, including tissue engineering and wound healing. First, we introduce several key polymeric materials of interest for use as biomaterials, including those that are naturally derived and synthetic. We, then, provide an overview of possible outcomes of plasma modification, such as surface activation, etching, and deposition of a thin film, all of which can be used to alter the surface properties of a given polymer. Following this discussion, we review the methods used to characterize plasma-treated polymer surface properties, as well as the techniques used to evaluate their interactions with biological species of interest such as mammalian cells, bacteria, and blood components. To close, we provide a perspective on future outlooks of this exciting and rapidly evolving field.
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Affiliation(s)
- Alyssa Morelli
- Department of Chemistry and Biochemistry, California State University Fresno, 2555 East San Ramon Avenue, MS SB70 Fresno, California 93740, United States
| | - Morgan J Hawker
- Department of Chemistry and Biochemistry, California State University Fresno, 2555 East San Ramon Avenue, MS SB70 Fresno, California 93740, United States
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26
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Aykaç A, Gergeroglu H, Beşli B, Akkaş EÖ, Yavaş A, Güler S, Güneş F, Erol M. An Overview on Recent Progress of Metal Oxide/Graphene/CNTs-Based Nanobiosensors. NANOSCALE RESEARCH LETTERS 2021; 16:65. [PMID: 33877478 PMCID: PMC8056378 DOI: 10.1186/s11671-021-03519-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/30/2021] [Indexed: 05/07/2023]
Abstract
Nanobiosensors are convenient, practical, and sensitive analyzers that detect chemical and biological agents and convert the results into meaningful data between a biologically active molecule and a recognition element immobilized on the surface of the signal transducer by a physicochemical detector. Due to their fast, accurate and reliable operating characteristics, nanobiosensors are widely used in clinical and nonclinical applications, bedside testing, medical textile industry, environmental monitoring, food safety, etc. They play an important role in such critical applications. Therefore, the design of the biosensing interface is essential in determining the performance of the nanobiosensor. The unique chemical and physical properties of nanomaterials have paved the way for new and improved sensing devices in biosensors. The growing demand for devices with improved sensing and selectivity capability, short response time, lower limit of detection, and low cost causes novel investigations on nanobiomaterials to be used as biosensor scaffolds. Among all other nanomaterials, studies on developing nanobiosensors based on metal oxide nanostructures, graphene and its derivatives, carbon nanotubes, and the widespread use of these nanomaterials as a hybrid structure have recently attracted attention. Nanohybrid structures created by combining these nanostructures will directly meet the future biosensors' needs with their high electrocatalytic activities. This review addressed the recent developments on these nanomaterials and their derivatives, and their use as biosensor scaffolds. We reviewed these popular nanomaterials by evaluating them with comparative studies, tables, and charts.
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Affiliation(s)
- Ahmet Aykaç
- Department of Engineering Sciences, Izmir Katip Çelebi University, 35620, Izmir, Turkey.
- Department of Nanoscience and Nanotechnology, Izmir Katip Çelebi University, 35620, Izmir, Turkey.
| | - Hazal Gergeroglu
- Department of Nanoscience and Nanoengineering, Dokuz Eylul University, 35390, Izmir, Turkey
| | - Büşra Beşli
- Department of Nanoscience and Nanotechnology, Izmir Katip Çelebi University, 35620, Izmir, Turkey
| | - Emine Özge Akkaş
- Department of Nanoscience and Nanotechnology, Izmir Katip Çelebi University, 35620, Izmir, Turkey
| | - Ahmet Yavaş
- Department of Material Science and Engineering, Izmir Katip Çelebi University, 35620, Izmir, Turkey
| | - Saadet Güler
- Department of Material Science and Engineering, Izmir Katip Çelebi University, 35620, Izmir, Turkey
| | - Fethullah Güneş
- Department of Material Science and Engineering, Izmir Katip Çelebi University, 35620, Izmir, Turkey
| | - Mustafa Erol
- Department of Metallurgical and Materials Engineering, Dokuz Eylul University, 35390, Izmir, Turkey
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Agarwal PPK, Jensen D, Chen CH, Rioux RM, Matsoukas T. Surface-Functionalized Boron Nanoparticles with Reduced Oxide Content by Nonthermal Plasma Processing for Nanoenergetic Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:6844-6853. [PMID: 33512149 DOI: 10.1021/acsami.0c20825] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The development of an in situ nonthermal plasma technology improved the oxidation and energy release of boron nanoparticles. We reduced the native oxide layer on the surface of boron nanoparticles (70 nm) by treatment in a nonthermal hydrogen plasma, followed by the formation of a passivation barrier by argon plasma-enhanced chemical vapor deposition (PECVD) using perfluorodecalin (C10F18). Both processes occur near room temperature, thus avoiding aggregation and sintering of the nanoparticles. High-resolution transmission electron microscopy (HRTEM), high-angular annular dark-field imaging (HAADF)-scanning TEM (STEM)-energy dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) demonstrated a significant reduction in surface oxide concentration due to hydrogen plasma treatment and the formation of a 2.5 nm thick passivation coating on the surface due to PECVD treatment. These results correlated with the thermal analysis results, which demonstrated a 19% increase in energy release and an increase in metallic boron content after 120 min of hydrogen plasma treatment and 15 min of PECVD of perfluorodecalin. The PECVD coating provided excellent passivation against air and humidity for 60 days. We conclude in situ nonthermal plasma reduction and passivation lead to the amelioration of energy release characteristics and the storage life of boron nanoparticles, benefits conducive for nanoenergetic applications.
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Affiliation(s)
- Prawal P K Agarwal
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Devon Jensen
- Advanced Cooling Technologies, Inc., Lancaster, Pennsylvania 17601, United States
| | - Chien-Hua Chen
- Advanced Cooling Technologies, Inc., Lancaster, Pennsylvania 17601, United States
| | - Robert M Rioux
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Themis Matsoukas
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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Yılmaz K, Gürsoy M, Karaman M. Vapor Deposition of Transparent Antifogging Polymeric Nanocoatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1941-1947. [PMID: 33507758 DOI: 10.1021/acs.langmuir.0c03437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study demonstrates the coating of a transparent and robust organic thin film having an excellent hydrophilicity-based antifogging property by an initiated chemical vapor deposition (iCVD) method. iCVD was able to synthesize linear and cross-liked poly(acrylic acid) (PAA) from the vapors of acrylic acid (AA) and ethylene glycol dimethacrylate (EGDMA) using tert-butyl peroxide (TBPO) as an initiator. High deposition rates of up to 35 nm/min were observed at low deposition temperatures. It was possible to control the quantity of comonomers in the as-deposited films by adjusting the partial pressure of the EGDMA cross-linking agent. The effect of the EGDMA partial pressure on chemical structure was studied using Fourier transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) techniques. FTIR and XPS spectra of the as-deposited films showed the complete retention of the monomer functionality during iCVD. Hydrophilicities and large-area uniformity of the coatings were revealed using water contact angle measurements. The as-deposited PAA film was the most hydrophilic with a water contact angle (WCA) of 7.0°, while cross-linking with EGDMA increased the WCA values by up to 51.7°. Results of various tests, which were based on exposing the coated surfaces to artificial fog and hot water vapor, showed the excellent antifogging property of the coatings. Films were never fogged upon extensive and long-term exposure (2 months) to humid air.
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Zhao Y, Huang C, Huang X, Huang H, Zhao H, Wang S, Liu S. Effectiveness of PECVD deposited nano-silicon oxide protective layer for polylactic acid film: Barrier and surface properties. Food Packag Shelf Life 2020. [DOI: 10.1016/j.fpsl.2020.100513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Khlyustova A, Cheng Y, Yang R. Vapor-deposited functional polymer thin films in biological applications. J Mater Chem B 2020; 8:6588-6609. [PMID: 32756662 PMCID: PMC7429282 DOI: 10.1039/d0tb00681e] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Functional polymer coatings have become ubiquitous in biological applications, ranging from biomaterials and drug delivery to manufacturing-scale separation of biomolecules using functional membranes. Recent advances in the technology of chemical vapor deposition (CVD) have enabled precise control of the polymer chemistry, coating thickness, and conformality. That comprehensive control of surface properties has been used to elicit desirable interactions at the interface between synthetic materials and living organisms, making vapor-deposited functional polymers uniquely suitable for biological applications. This review captures the recent technological development in vapor-deposited functional polymer coatings, highlighting their biological applications, including membrane-based bio-separations, biosensing and bio-MEMS, drug delivery, and tissue engineering. The conformal nature of vapor-deposited coatings ensures uniform coverage over micro- and nano-structured surfaces, allowing the independent optimization of surface and bulk properties. The substrate-independence of CVD techniques enables facile transfer of surface characteristics among different applications. The vapor-deposited functional polymer thin films tend to be biocompatible because they are free of remnant toxic solvents and precursor molecules, potentially lowering the barrier to clinical success.
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Affiliation(s)
- Alexandra Khlyustova
- Robert F. Smith School of Chemical & Biomolecular Engineering, Cornell University, Ithaca, New York 14850, USA.
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Ashurbekova K, Ashurbekova K, Botta G, Yurkevich O, Knez M. Vapor phase processing: a novel approach for fabricating functional hybrid materials. NANOTECHNOLOGY 2020; 31:342001. [PMID: 32353844 DOI: 10.1088/1361-6528/ab8edb] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Materials science is nowadays facing challenges in optimizing properties of materials which are needed for numerous technological applications and include, but are not limited to, mechanics, electronics, optics, etc. The key issue is that for emerging applications materials are needed which incorporate certain properties from polymers or biopolymers and metals or ceramics at the same time, thus fabrication of functional hybrid materials becomes inevitable. Routes for the synthesis of functional hybrid materials can be manifold. Among the explored routes vapor phase processing is a rather novel approach which opts for compatibility with many existing industrial processes. This topical review summarizes the most important approaches and achievements in the synthesis of functional hybrid materials through vapor phase routes with the goal to fabricate suitable hybrid materials for future mechanical, electronic, optical or biomedical applications. Most of the approaches rely on atomic layer deposition (ALD) and techniques related to this process, including molecular layer deposition (MLD) and vapor phase infiltration (VPI), or variations of chemical vapor deposition (CVD). The thus fabricated hybrid materials or nanocomposites often show exceptional physical or chemical properties, which result from synergies of the hybridized materials families. Even though the research in this field is still in its infancy, the initial results encourage further development and promise great application potential in a large variety of applications fields such as flexible electronics, energy conversion or storage, functional textile, and many more.
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Degradable Poly(ethylene oxide)-Like Plasma Polymer Films Used for the Controlled Release of Nisin. Polymers (Basel) 2020; 12:polym12061263. [PMID: 32492821 PMCID: PMC7362230 DOI: 10.3390/polym12061263] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/27/2020] [Accepted: 05/30/2020] [Indexed: 12/22/2022] Open
Abstract
Poly(ethylene oxide) (PEO)-like thin films were successfully prepared by plasma-assisted vapor thermal deposition (PAVTD). PEO powders with a molar weight (Mw) between 1500 g/mol and 600,000 g/mol were used as bulk precursors. The effect of Mw on the structural and surface properties was analyzed for PEO films prepared at a lower plasma power. Fourier transform (FTIR-ATR) spectroscopy showed that the molecular structure was well preserved regardless of the Mw of the precursors. The stronger impact of the process conditions (the presence/absence of plasma) was proved. Molecular weight polydispersity, as well as wettability, increased in the samples prepared at 5 W. The influence of deposition plasma power (0–30 W) on solubility and permeation properties was evaluated for a bulk precursor of Mw 1500 g/mol. The rate of thickness loss after immersion in water was found to be tunable in this way, with the films prepared at the highest plasma power showing higher stability. The effect of plasma power deposition conditions was also shown during the permeability study. Prepared PEO films were used as a cover, and permeation layers for biologically active nisin molecule and a controlled release of this bacteriocin into water was achieved.
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Vijayan VM, Tucker BS, Hwang PTJ, Bobba PS, Jun HW, Catledge SA, Vohra YK, Thomas V. Non-equilibrium organosilane plasma polymerization for modulating the surface of PTFE towards potential blood contact applications. J Mater Chem B 2020; 8:2814-2825. [PMID: 32163093 PMCID: PMC7453349 DOI: 10.1039/c9tb02757b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We report a novel and facile organosilane plasma polymerization method designed to improve the surface characteristics of poly(tetrafluoroethylene) (PTFE). We hypothesized that the polymerized silane coating would provide an adhesive surface for endothelial cell proliferation due to a large number of surface hydroxyl groups, while the large polymer networks on the surface of PTFE would hinder platelet attachment. The plasma polymerized PTFE surfaces were then systematically characterized via different analytical techniques such as FTIR, XPS, XRD, Contact angle, and SEM. The key finding of the characterization is the time-dependent deposition of an organosilane layer on the surface of PTFE. This layer was found to provide favorable surface properties to PTFE such as a very high surface oxygen content, high hydrophilicity and improved surface mechanics. Additionally, in vitro cellular studies were conducted to determine the bio-interface properties of the plasma-treated and untreated PTFE. The important results of these experiments were rapid endothelial cell growth and decreased platelet attachment on the plasma-treated PTFE compared to untreated PTFE. Thus, this new surface modification technique could potentially address the current challenges associated with PTFE for blood contact applications, specifically poor endothelial cell growth and risk of thrombosis.
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Affiliation(s)
- Vineeth M Vijayan
- Center for Nanoscale Materials and Biointegration, The University of Alabama at Birmingham, Birmingham, AL 35294, USA. and Department of Material Science and Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Bernabe S Tucker
- Department of Material Science and Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | | | - Pratheek S Bobba
- Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ho-Wook Jun
- Department of Biomedical Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Shane A Catledge
- Center for Nanoscale Materials and Biointegration, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | - Yogesh K Vohra
- Center for Nanoscale Materials and Biointegration, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
| | - Vinoy Thomas
- Center for Nanoscale Materials and Biointegration, The University of Alabama at Birmingham, Birmingham, AL 35294, USA. and Department of Material Science and Engineering, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Zhao X, Wei C, Gai Z, Yu S, Ren X. Chemical vapor deposition and its application in surface modification of nanoparticles. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00963-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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35
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Yang H, Wang H, Feng J, Ye Y, Liu W. Solventless Synthesis and Patterning of UV‐Responsive Poly(allyl methacrylate) Film. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Huidong Yang
- Ningbo Key Laboratory of Specialty Polymers Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China
| | - Hong Wang
- Ningbo Key Laboratory of Specialty Polymers Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China
| | - Jingang Feng
- Ningbo Key Laboratory of Specialty Polymers Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China
| | - Yumin Ye
- Ningbo Key Laboratory of Specialty Polymers Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China
| | - Wenna Liu
- Ningbo Key Laboratory of Specialty Polymers Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China
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Yılmaz K, Şakalak H, Gürsoy M, Karaman M. Initiated Chemical Vapor Deposition of Poly(Ethylhexyl Acrylate) Films in a Large-Scale Batch Reactor. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02213] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Kurtuluş Yılmaz
- Chemical Engineering Department, Konya Technical University, Konya 42030, Turkey
| | - Hüseyin Şakalak
- Advanced Materials and Nanotechnology Department, Selcuk University, Konya 42075, Turkey
| | - Mehmet Gürsoy
- Chemical Engineering Department, Konya Technical University, Konya 42030, Turkey
| | - Mustafa Karaman
- Chemical Engineering Department, Konya Technical University, Konya 42030, Turkey
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Perspectives on antibacterial performance of silver nanoparticle-loaded three-dimensional polymeric constructs. Biointerphases 2018; 13:06E404. [PMID: 30261733 DOI: 10.1116/1.5042426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Silver nanoparticle (AgNP)-loaded polymeric constructs are widely investigated for potential applications as drug delivery systems, wound dressings, and antibiofouling biomaterials. Herein, the authors present several methods for fabricating such materials and evaluate their efficacy against Escherichia coli. H2O(v) plasma surface modification is employed to enhance material surface wettability (explored by water contact angle goniometry) and nanoparticle incorporation. Compositional analyses reveal that incorporation of AgNPs on the surface and bulk of the materials strongly depends on the fabrication methodology. More importantly, the nature of AgNP incorporation into the polymer has direct implications on the biocidal performance resulting from the release of Ag+. The materials fabricated herein fell significantly short of healthcare standards with respect to antimicrobial behavior, and, in comparing their results to numerous literature studies, the authors identified a glaring disparity in the way such results are often described. Thus, this work also contains a critical evaluation of the literature, highlighting select poor-performing materials to demonstrate several shortcomings in the quantitative analysis and reporting of the antibacterial efficacy of AgNP-loaded materials. Ultimately, recommendations for best practices for better evaluation of these constructs toward improved antibacterial efficacy in medical settings are provided.
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Cheng C, Gupta M. Roll-to-Roll Surface Modification of Cellulose Paper via Initiated Chemical Vapor Deposition. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03030] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Christine Cheng
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, 925 Bloom Walk, Los Angeles, California 90089, United States
| | - Malancha Gupta
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, 925 Bloom Walk, Los Angeles, California 90089, United States
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Hachim D, Brown BN. Surface modification of polypropylene for enhanced layer-by-layer deposition of polyelectrolytes. J Biomed Mater Res A 2018; 106:2078-2085. [PMID: 29569359 PMCID: PMC5980743 DOI: 10.1002/jbm.a.36405] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 01/19/2018] [Accepted: 03/15/2018] [Indexed: 01/31/2023]
Abstract
We have performed three distinct plasma enhanced chemical vapor deposition procedures that can be widely and consistently used in commercially available plasma systems to modify the surface of hydrocarbon-based biomaterials such as polypropylene. In particular, we have evaluated the feasibility of these procedures to provide consistent and stable charged substrates to perform layer-by-layer (LbL) coatings. Surface characterization of both plasma and LbL coatings were done using X-ray photoelectron spectroscopy, attenuated total reflection-Fourier transform infrared spectroscopy, contact angle measurements and surface staining. Results showed successful surface grafting of functional groups in all plasma procedures that led to increased hydrophilicity and uniform LbL coatings with different efficiencies. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 2078-2085, 2018.
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Affiliation(s)
- Daniel Hachim
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, PA 15219, United States
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O’Hara Street, Pittsburgh, PA 15260, United States
| | - Bryan N. Brown
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, 450 Technology Drive, Pittsburgh, PA 15219, United States
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, 3700 O’Hara Street, Pittsburgh, PA 15260, United States
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, University of Pittsburgh, 300 Halket Street, Pittsburgh, PA 15213, United States
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Maskless Surface Modification of Polyurethane Films by an Atmospheric Pressure He/O₂ Plasma Microjet for Gelatin Immobilization. MICROMACHINES 2018; 9:mi9040195. [PMID: 30424128 PMCID: PMC6187667 DOI: 10.3390/mi9040195] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/01/2018] [Accepted: 04/17/2018] [Indexed: 01/28/2023]
Abstract
A localized maskless modification method of polyurethane (PU) films through an atmospheric pressure He/O2 plasma microjet (APPμJ) was proposed. The APPμJ system combines an atmospheric pressure plasma jet (APPJ) with a microfabricated silicon micronozzle with dimension of 30 μm, which has advantages of simple structure and low cost. The possibility of APPμJ in functionalizing PU films with hydroxyl (–OH) groups and covalent grafting of gelatin for improving its biocompatibility was demonstrated. The morphologies and chemical compositions of the modified surface were analyzed by scanning electronic microscopy (SEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The fluorescent images show the modified surface can be divided into four areas with different fluorescence intensity from the center to the outside domain. The distribution of the rings could be controlled by plasma process parameters, such as the treatment time and the flow rate of O2. When the treatment time is 4 to 5 min with the oxygen percentage of 0.6%, the PU film can be effectively local functionalized with the diameter of 170 μm. In addition, the modification mechanism of PU films by the APPμJ is investigated. The localized polymer modified by APPμJ has potential applications in the field of tissue engineering.
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Time of flight secondary ion mass spectrometry-A method to evaluate plasma-modified three-dimensional scaffold chemistry. Biointerphases 2018; 13:03B415. [PMID: 29602281 DOI: 10.1116/1.5023005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Biopolymers are used extensively in the manufacture of porous scaffolds for a variety of biological applications. The surfaces of these scaffolds are often modified to encourage specific interactions such as surface modification of scaffolds to prevent fouling or to promote a cell supportive environment for tissue engineering implants. However, few techniques can effectively characterize the uniformity of surface modifications in a porous scaffold. By filling the scaffold pores through polymer embedding, followed by analysis with imaging time-of-flight secondary ion mass spectrometry (ToF-SIMS), the distribution and composition of surface chemical species though complex porous scaffolds can be characterized. This method is demonstrated on poly(caprolactone) scaffolds modified with a low-fouling plasma-deposited coating from octafluoropropane via plasma enhanced chemical vapor deposition. A gradient distribution of CF+/CF3+ is observed for scaffolds plasma treated for 5 min, whereas a 20 min treatment results in more uniform distribution of the surface modification throughout the entire scaffold. The authors expect this approach to be widely applicable for ToF-SIMS analysis of scaffolds modified by multiple plasma processing techniques as well as alternative surface modification approaches.
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Skočdopole J, Kalvoda L, Nozar P, Netopilík M. Preparation of polymeric coatings by ionized jet deposition method. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0426-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Mann MN, Fisher ER. Investigation of Antibacterial 1,8-Cineole-Derived Thin Films Formed via Plasma-Enhanced Chemical Vapor Deposition. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36548-36560. [PMID: 28984443 DOI: 10.1021/acsami.7b09067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The need for low-fouling coatings for biomedical devices has prompted considerable interest in antibacterial compounds from natural and sustainable sources, such as essential oils. Herein, a tea tree oil-based precursor, 1,8-cineole, is used to fabricate antimicrobial films (denoted ppCin) by plasma-enhanced chemical vapor deposition. Film properties were comprehensively characterized using a variety of surface and bulk analytical tools, and the plasma gas phase is assessed using optical emission spectroscopy, which can be correlated to ppCin film properties. Notably, film wettability increases linearly with plasma pressure, yielding water contact angles ranging from ∼50° to ∼90°. X-ray photoelectron spectroscopy reveals less oxygen is incorporated at higher pressures, likely arising from the lower density of OH(g) species. Further, we utilized H2O(v) plasma surface modification of the ppCin films to improve wettability and find this results in a substantial increase in surface oxygen content. To elucidate the role of film wettability and antibacterial properties, both as-deposited and H2O(v) plasma-modified films were exposed to Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus using glass slides and hydrocarbon films deposited from 1,7-octadiene as positive controls. Overall, bacteria attach to a similar extent on all films, including controls, yet only essential oil-based films significantly prevent biofilm formation (4-7% coverage compared to ∼40% for controls).
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Affiliation(s)
- Michelle N Mann
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523-1872, United States
| | - Ellen R Fisher
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523-1872, United States
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Mörke C, Rebl H, Finke B, Dubs M, Nestler P, Airoudj A, Roucoules V, Schnabelrauch M, Körtge A, Anselme K, Helm CA, Nebe JB. Abrogated Cell Contact Guidance on Amino-Functionalized Microgrooves. ACS APPLIED MATERIALS & INTERFACES 2017; 9:10461-10471. [PMID: 28296389 DOI: 10.1021/acsami.6b16430] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Topographical and chemical features of biomaterial surfaces affect the cell physiology at the interface and are promising tools for the improvement of implants. The dominance of the surface topography on cell behavior is often accentuated. Striated surfaces induce an alignment of cells and their intracellular adhesion-mediated components. Recently, it could be demonstrated that a chemical modification via plasma polymerized allylamine was not only able to boost osteoblast cell adhesion and spreading but also override the cell alignment on stochastically machined titanium. In order to discern what kind of chemical surface modifications let the cell forget the underlying surface structure, we used an approach on geometric microgrooves produced by deep reactive ion etching (DRIE). In this study, we systematically investigated the surface modification by (i) methyl-, carboxyl-, and amino functionalization created via plasma polymerization processes, (ii) coating with the extracellular matrix protein collagen-I or immobilization of the integrin adhesion peptide sequence Arg-Gly-Asp (RGD), and (iii) treatment with an atmospheric pressure plasma jet operating with argon/oxygen gas (Ar/O2). Interestingly, only the amino functionalization, which presented positive charges at the surface, was able to chemically disguise the microgrooves and therefore to interrupt the microtopography induced contact guidance of the osteoblastic cells MG-63. However, the RGD peptide coating revealed enhanced cell spreading as well, with fine, actin-containing protrusions. The Ar/O2-functionalization demonstrated the best topography handling, e.g. cells closely attached even to features such as the sidewalls of the groove steps. In the end, the amino functionalization is unique in abrogating the cell contact guidance.
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Affiliation(s)
- Caroline Mörke
- Department of Cell Biology, University Medical Center Rostock , Schillingallee 69, 18057 Rostock, Germany
| | - Henrike Rebl
- Department of Cell Biology, University Medical Center Rostock , Schillingallee 69, 18057 Rostock, Germany
| | - Birgit Finke
- Leibniz-Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489 Greifswald, Germany
| | - Manuela Dubs
- Biomaterials Department, INNOVENT e. V. , Pruessingstrasse 27B, 07745 Jena, Germany
| | - Peter Nestler
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Strasse 6, 17487 Greifswald, Germany
| | - Aissam Airoudj
- Institute of Materials Sciences of Mulhouse (IS2M), CNRS UMR7361, 15 rue jean starcky, BP2488, 68057 Mulhouse cedex, France
| | - Vincent Roucoules
- Institute of Materials Sciences of Mulhouse (IS2M), CNRS UMR7361, 15 rue jean starcky, BP2488, 68057 Mulhouse cedex, France
| | | | - Andreas Körtge
- Institute of Electronic Appliances and Circuits, University of Rostock , Albert-Einstein-Strasse 2, 18059 Rostock, Germany
| | - Karine Anselme
- Institute of Materials Sciences of Mulhouse (IS2M), CNRS UMR7361, 15 rue jean starcky, BP2488, 68057 Mulhouse cedex, France
| | - Christiane A Helm
- Institute of Physics, University of Greifswald, Felix-Hausdorff-Strasse 6, 17487 Greifswald, Germany
| | - J Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock , Schillingallee 69, 18057 Rostock, Germany
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46
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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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47
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Sereda V, Ralbovsky NM, Vasudev MC, Naik RR, Lednev IK. Polarized Raman Spectroscopy for Determining the Orientation of di-D-phenylalanine Molecules in a Nanotube. JOURNAL OF RAMAN SPECTROSCOPY : JRS 2016; 47:1056-1062. [PMID: 27795612 PMCID: PMC5079532 DOI: 10.1002/jrs.4884] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Self-assembly of short peptides into nanostructures has become an important strategy for the bottom-up fabrication of nanomaterials. Significant interest to such peptide-based building blocks is due to the opportunity to control the structure and properties of well-structured nanotubes, nanofibrils, and hydrogels. X-ray crystallography and solution NMR, two major tools of structural biology, have significant limitations when applied to peptide nanotubes because of their non-crystalline structure and large weight. Polarized Raman spectroscopy was utilized for structural characterization of well-aligned D-Diphenylalanine nanotubes. The orientation of selected chemical groups relative to the main axis of the nanotube was determined. Specifically, the C-N bond of CNH3+groups is oriented parallel to the nanotube axis, the peptides' carbonyl groups are tilted at approximately 54° from the axis and the COO- groups run perpendicular to the axis. The determined orientation of chemical groups allowed the understanding of the orientation of D-diphenylalanine molecule that is consistent with its equilibrium conformation. The obtained data indicate that there is only one orientation of D-diphenylalanine molecules with respect to the nanotube main axis.
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Affiliation(s)
- Valentin Sereda
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Avenue, Albany, NY 12222, United States
| | - Nicole M. Ralbovsky
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Avenue, Albany, NY 12222, United States
| | - Milana C. Vasudev
- Department of Bioengineering, University of Massachusetts Dartmouth, 285 Old Westport Road, Dartmouth MA 02747, United States
| | - Rajesh R. Naik
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Igor K. Lednev
- Department of Chemistry, University at Albany, SUNY, 1400 Washington Avenue, Albany, NY 12222, United States
- Corresponding author: , Phone: (518) 591 8863, Fax: (518) 442-3462
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48
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Böke F, Giner I, Keller A, Grundmeier G, Fischer H. Plasma-Enhanced Chemical Vapor Deposition (PE-CVD) yields better Hydrolytical Stability of Biocompatible SiOx Thin Films on Implant Alumina Ceramics compared to Rapid Thermal Evaporation Physical Vapor Deposition (PVD). ACS APPLIED MATERIALS & INTERFACES 2016; 8:17805-17816. [PMID: 27299181 DOI: 10.1021/acsami.6b04421] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Densely sintered aluminum oxide (α-Al2O3) is chemically and biologically inert. To improve the interaction with biomolecules and cells, its surface has to be modified prior to use in biomedical applications. In this study, we compared two deposition techniques for adhesion promoting SiOx films to facilitate the coupling of stable organosilane monolayers on monolithic α-alumina; physical vapor deposition (PVD) by thermal evaporation and plasma enhanced chemical vapor deposition (PE-CVD). We also investigated the influence of etching on the formation of silanol surface groups using hydrogen peroxide and sulfuric acid solutions. The film characteristics, that is, surface morphology and surface chemistry, as well as the film stability and its adhesion properties under accelerated aging conditions were characterized by means of X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and tensile strength tests. Differences in surface functionalization were investigated via two model organosilanes as well as the cell-cytotoxicity and viability on murine fibroblasts and human mesenchymal stromal cells (hMSC). We found that both SiOx interfaces did not affect the cell viability of both cell types. No significant differences between both films with regard to their interfacial tensile strength were detected, although failure mode analyses revealed a higher interfacial stability of the PE-CVD films compared to the PVD films. Twenty-eight day exposure to simulated body fluid (SBF) at 37 °C revealed a partial delamination of the thermally deposited PVD films whereas the PE-CVD films stayed largely intact. SiOx layers deposited by both PVD and PE-CVD may thus serve as viable adhesion-promoters for subsequent organosilane coupling agent binding to α-alumina. However, PE-CVD appears to be favorable for long-term direct film exposure to aqueous solutions.
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Affiliation(s)
- Frederik Böke
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital , Pauwelsstrasse 30, 52074 Aachen, Germany
| | - Ignacio Giner
- Technical and Macromolecular Chemistry, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany
| | - Adrian Keller
- Technical and Macromolecular Chemistry, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany
| | - Guido Grundmeier
- Technical and Macromolecular Chemistry, University of Paderborn , Warburger Strasse 100, 33098 Paderborn, Germany
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital , Pauwelsstrasse 30, 52074 Aachen, Germany
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49
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Santos M, Filipe EC, Michael PL, Hung J, Wise SG, Bilek MMM. Mechanically Robust Plasma-Activated Interfaces Optimized for Vascular Stent Applications. ACS APPLIED MATERIALS & INTERFACES 2016; 8:9635-9650. [PMID: 27015083 DOI: 10.1021/acsami.6b01279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The long-term performance of many medical implants is limited by the use of inherently incompatible and bioinert materials. Metallic alloys, ceramics, and polymers commonly used in cardiovascular devices encourage clot formation and fail to promote the appropriate molecular signaling required for complete implant integration. Surface coating strategies have been proposed for these materials, but coronary stents are particularly problematic as the large surface deformations they experience in deployment require a mechanically robust coating interface. Here, we demonstrate a single-step ion-assisted plasma deposition process to tailor plasma-activated interfaces to meet current clinical demands for vascular implants. Using a process control-feedback strategy which predicts crucial coating growth mechanisms by adopting a suitable macroscopic plasma description in combination with noninvasive plasma diagnostics, we describe the optimal conditions to generate highly reproducible, industry-scalable stent coatings. These interfaces are mechanically robust, resisting delamination even upon plastic deformation of the underlying material, and were developed in consideration of the need for hemocompatibility and the capacity for biomolecule immobilization. Our optimized coating conditions combine the best mechanical properties with strong covalent attachment capacity and excellent blood compatibility in initial testing with plasma and whole blood, demonstrating the potential for improved vascular stent coatings.
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Affiliation(s)
- Miguel Santos
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Elysse C Filipe
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Praveesuda L Michael
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Juichien Hung
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
| | - Steven G Wise
- Applied Materials Group, The Heart Research Institute , 7 Eliza Street, Newtown, New South Wales 2042, Australia
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50
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Choukourov A, Gordeev I, Ponti J, Uboldi C, Melnichuk I, Vaidulych M, Kousal J, Nikitin D, Hanyková L, Krakovský I, Slavínská D, Biederman H. Microphase-Separated PE/PEO Thin Films Prepared by Plasma-Assisted Vapor Phase Deposition. ACS APPLIED MATERIALS & INTERFACES 2016; 8:8201-8212. [PMID: 26953817 DOI: 10.1021/acsami.5b12382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Immiscible polymer blends tend to undergo phase separation with the formation of nanoscale architecture which can be used in a variety of applications. Different wet-chemistry techniques already exist to fix the resultant polymeric structure in predictable manner. In this work, an all-dry and plasma-based strategy is proposed to fabricate thin films of microphase-separated polyolefin/polyether blends. This is achieved by directing (-CH2-)100 and (-CH2-CH2-O-)25 oligomer fluxes produced by vacuum thermal decomposition of poly(ethylene) and poly(ethylene oxide) onto silicon substrates through the zone of the glow discharge. The strategy enables mixing of thermodynamically incompatible macromolecules at the molecular level, whereas electron-impact-initiated radicals serve as cross-linkers to arrest the subsequent phase separation at the nanoscale. The mechanism of the phase separation as well as the morphology of the films is found to depend on the ratio between the oligomeric fluxes. For polyolefin-rich mixtures, polyether molecules self-organize by nucleation and growth into spherical domains with average height of 22 nm and average diameter of 170 nm. For equinumerous fluxes and for mixtures with the prevalence of polyethers, spinodal decomposition is detected that results in the formation of bicontinuous structures with the characteristic domain size and spacing ranging between 5 × 10(1) -7 × 10(1) nm and 3 × 10(2)-4 × 10(2) nm, respectively. The method is shown to produce films with tunable wettability and biologically nonfouling properties.
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Affiliation(s)
- Andrei Choukourov
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Ivan Gordeev
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
- Jan Evangelista Purkyne University in Usti nad Labem , Faculty of Science, Department of Physics, České mládeže 8, Usti nad Labem 400 96, Czech Republic
| | - Jessica Ponti
- European Commision Joint Research Centre, Institute for Health and Consumer Protection , Nanobiosciences, via Fermi 2749, 21027 Ispra, Italy
| | - Chiara Uboldi
- European Commision Joint Research Centre, Institute for Health and Consumer Protection , Nanobiosciences, via Fermi 2749, 21027 Ispra, Italy
| | - Iurii Melnichuk
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Mykhailo Vaidulych
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Jaroslav Kousal
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Daniil Nikitin
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Lenka Hanyková
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Ivan Krakovský
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Danka Slavínská
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
| | - Hynek Biederman
- Charles University in Prague , Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague, Czech Republic
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