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Jonguitud-Flores S, Yáñez-Soto B, Pérez E, Sánchez-Balderas G. Wetting transitions in adhesive surfaces of polystyrene: The petal effect. J Colloid Interface Sci 2024; 674:178-185. [PMID: 38925063 DOI: 10.1016/j.jcis.2024.06.121] [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: 04/14/2024] [Revised: 06/11/2024] [Accepted: 06/16/2024] [Indexed: 06/28/2024]
Abstract
HYPOTHESIS The petal effect is a well-known natural phenomenon in surface science and has served as inspiration for the creation of several materials with superhydrophobic qualities and high adhesion. As surface roughness has a crucial role in these properties, being able to modulate it could help us design materials at will. Capillary penetration frustrates diffusion and promotes large contact angles as well as high adhesion. EXPERIMENTS Polystyrene surfaces were created using the spin-coating technique. By varying the polymer concentration, the surface roughness was modified. To determine the roughness parameters, atomic force microscopy was used. We recorded advancing and receding contact angles using water and glycerol as test liquids to study contact angle hysteresis, the work of adhesion and the apparent surface energy, which was determined with the Chibowski and Perea-Carpio method. For the purpose of elucidating the wetting states, captive bubble experiments were conducted. FINDINGS Using an easy method, we create polystyrene surfaces with both superhydrophobicity and strong adhesion, where the roughness area factor regulates wetting transitions from Cassie-Baxter to Wenzel. The receding contact angle suggests capillary penetration, which we demonstrate by captive bubble experiments. In addition, a link was found between the surface roughness and apparent surface energy.
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Affiliation(s)
- Silvia Jonguitud-Flores
- Instituto de Física, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, 78000 San Luis Potosí, Mexico
| | - Bernardo Yáñez-Soto
- Instituto de Física, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, 78000 San Luis Potosí, Mexico
| | - Elías Pérez
- Instituto de Física, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, 78000 San Luis Potosí, Mexico
| | - G Sánchez-Balderas
- Instituto de Física, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, 78000 San Luis Potosí, Mexico; Facultad de Medicina, Universidad Autónoma de Sinaloa, Culiacán, Sinaloa, Mexico.
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2
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Campagna R, Schiavoni V, Marchetti E, Salvolini E, Frontini A, Sampalmieri F, Bambini F, Meme’ L. In Vitro Study of the Proliferation of MG63 Cells Cultured on Five Different Titanium Surfaces. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2208. [PMID: 38793273 PMCID: PMC11122938 DOI: 10.3390/ma17102208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/29/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024]
Abstract
The use of dental implants for prosthetic rehabilitation in dentistry is based on the concept of osteointegration. This concept enables the clinical stability of the implants and a total absence of inflammatory tissue between the implant surface and the bone tissue. For this reason, it is essential to understand the role of the titanium surface in promoting and maintaining or not maintaining contact between the bone matrix and the surface of the titanium implant. MATERIALS AND METHODS Five types of titanium discs placed in contact with osteoblast cultures of osteosarcomas were studied. The materials had different roughness. Scanning electron microscopy (SEM) photos were taken before the in vitro culture to analyze the surfaces, and at the end of the culturing time, the different gene expressions of a broad pattern of proteins were evaluated to analyze the osteoblast response, as indicated in the scientific literature. RESULTS It was demonstrated that the responses of the osteoblasts were different in the five cultures in contact with the five titanium discs with different surfaces; in particular, the response in the production of some proteins was statistically significant. DISCUSSION The key role of titanium surfaces underlines how it is still possible to carry out increasingly accurate and targeted studies in the search for new surfaces capable of stimulating a better osteoblastic response and the long-term maintenance of osteointegration.
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Affiliation(s)
- Roberto Campagna
- Department of Clinical Sciences, Polytechnic University of Marche, 60121 Ancona, Italy; (R.C.); (V.S.); (F.S.); (L.M.)
| | - Valentina Schiavoni
- Department of Clinical Sciences, Polytechnic University of Marche, 60121 Ancona, Italy; (R.C.); (V.S.); (F.S.); (L.M.)
| | - Enrico Marchetti
- Department of Life, Health, Environmental Sciences, University of L’Aquila, 67100 L’Aquila, Italy;
| | - Eleonora Salvolini
- Department of Clinical Sciences, Polytechnic University of Marche, 60121 Ancona, Italy; (R.C.); (V.S.); (F.S.); (L.M.)
| | - Andrea Frontini
- Department of Life and Environmental Sciences, Polytechnic University of Marche, 60121 Ancona, Italy;
| | - Francesco Sampalmieri
- Department of Clinical Sciences, Polytechnic University of Marche, 60121 Ancona, Italy; (R.C.); (V.S.); (F.S.); (L.M.)
| | - Fabrizio Bambini
- Department of Clinical Sciences, Polytechnic University of Marche, 60121 Ancona, Italy; (R.C.); (V.S.); (F.S.); (L.M.)
| | - Lucia Meme’
- Department of Clinical Sciences, Polytechnic University of Marche, 60121 Ancona, Italy; (R.C.); (V.S.); (F.S.); (L.M.)
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Vranceanu DM, Ungureanu E, Ionescu IC, Parau AC, Pruna V, Titorencu I, Badea M, Gălbău CȘ, Idomir M, Dinu M, (Dragomir) AV, Cotrut CM. In Vitro Characterization of Hydroxyapatite-Based Coatings Doped with Mg or Zn Electrochemically Deposited on Nanostructured Titanium. Biomimetics (Basel) 2024; 9:244. [PMID: 38667255 PMCID: PMC11047857 DOI: 10.3390/biomimetics9040244] [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: 03/06/2024] [Revised: 04/04/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
Biomaterials are an important and integrated part of modern medicine, and their development and improvement are essential. The fundamental requirement of a biomaterial is found to be in its interaction with the surrounding environment, with which it must coexist. The aim of this study was to assess the biological characteristics of hydroxyapatite (HAp)-based coatings doped with Mg and Zn ions obtained by the pulsed galvanostatic electrochemical method on the surface of pure titanium (cp-Ti) functionalized with titanium dioxide nanotubes (NTs TiO2) obtained by anodic oxidation. The obtained results highlighted that the addition of Zn or Mg into the HAp structure enhances the in vitro response of the cp-Ti surface functionalized with NT TiO2. The contact angle and surface free energy showed that all the developed surfaces have a hydrophilic character in comparison with the cp-Ti surface. The HAp-based coatings doped with Zn registered superior values than the ones with Mg, in terms of biomineralization, electrochemical behavior, and cell interaction. Overall, it can be said that the addition of Mg or Zn can enhance the in vitro behavior of the HAp-based coatings in accordance with clinical requirements. Antibacterial tests showed that the proposed HAp-Mg coatings had no efficiency against Escherichia coli, while the HAp-Zn coatings registered the highest antibacterial efficiency.
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Affiliation(s)
- Diana M. Vranceanu
- Faculty of Materials Science and Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (D.M.V.)
| | - Elena Ungureanu
- Faculty of Materials Science and Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (D.M.V.)
| | - Ionut C. Ionescu
- Faculty of Materials Science and Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (D.M.V.)
| | - Anca C. Parau
- National Institute of Research and Development for Optoelectronics INOE2000, 409 Atomistilor, 077125 Magurele, Romania
| | - Vasile Pruna
- Romanian Academy Institute of Cellular Biology and Pathology “Nicolae Simionescu”, 8 B.P. Hasdeu, 050568 Bucharest, Romania
| | - Irina Titorencu
- Romanian Academy Institute of Cellular Biology and Pathology “Nicolae Simionescu”, 8 B.P. Hasdeu, 050568 Bucharest, Romania
| | - Mihaela Badea
- Prophylactic and Clinical Disciplines, Department of Fundamental, Faculty of Medicine, Transilvania University of Brasov, 56 Nicolae Balcescu, 500019 Brasov, Romania
- Research Center for Fundamental Research and Prevention Strategies in Medicine, Research and Development Institute, Transilvania University of Brasov, Romania Institutului, 10, 500484 Brașov, Romania
| | - Cristina-Ștefania Gălbău
- Prophylactic and Clinical Disciplines, Department of Fundamental, Faculty of Medicine, Transilvania University of Brasov, 56 Nicolae Balcescu, 500019 Brasov, Romania
- Research Center for Fundamental Research and Prevention Strategies in Medicine, Research and Development Institute, Transilvania University of Brasov, Romania Institutului, 10, 500484 Brașov, Romania
| | - Mihaela Idomir
- Prophylactic and Clinical Disciplines, Department of Fundamental, Faculty of Medicine, Transilvania University of Brasov, 56 Nicolae Balcescu, 500019 Brasov, Romania
- Research Center for Fundamental Research and Prevention Strategies in Medicine, Research and Development Institute, Transilvania University of Brasov, Romania Institutului, 10, 500484 Brașov, Romania
| | - Mihaela Dinu
- National Institute of Research and Development for Optoelectronics INOE2000, 409 Atomistilor, 077125 Magurele, Romania
| | - Alina Vladescu (Dragomir)
- National Institute of Research and Development for Optoelectronics INOE2000, 409 Atomistilor, 077125 Magurele, Romania
| | - Cosmin M. Cotrut
- Faculty of Materials Science and Engineering, National University of Science and Technology Politehnica Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania; (D.M.V.)
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Maquera-Huacho PM, de Carvalho GG, Jafelicci M, Marcantonio E, Spolidorio DMP. Physical-chemical influences and cell behavior of natural compounds on titanium dental surfaces. Braz Dent J 2023; 34:53-62. [PMID: 38133473 PMCID: PMC10759949 DOI: 10.1590/0103-6440202305582] [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: 05/11/2023] [Accepted: 10/30/2023] [Indexed: 12/23/2023] Open
Abstract
The present study evaluated the influence of carvacrol, terpinene-4-ol, and chlorhexidine on the physical-chemical properties of titanium surfaces, cell viability, proliferation, adhesion, and spreading of fibroblasts and osteoblasts in vitro. Titanium surfaces (Ti) were treated with Carvacrol (Cvc), Terpinen-4-ol (T4ol), Chlorhexidine (CHX), DMSO, and ultrapure water (Control group). Physical-chemical modifications were evaluated by surface wettability, the surface free energy (SFE) calculated from the contact angle values using the Owens-Wendt-Rabel-Kaeble (OWRK) equation, scanning electron microscopy (SEM) and energy dispersive spectrometry probe (EDS) system. Cells were seeded onto Ti-treated surfaces and incubated for 24 h and 72 h, then evaluated by Alamar blue assay and fluorescence microscopy. Surfaces treated with Cvc and T4ol showed the presence of Na, O, and Cl. All surfaces showed hydrophilic characteristics and SFE values between 5.5 mN/m and 3.4 mN/m. On the other hand, EDS peaks demonstrated the presence of O and Cl after CHX treatment. A reduction of cell viability and adhesion was noted on titanium surfaces treated with CHX after 24 and 72h. In conclusion, the results indicate that the decontamination with Cvc and T4ol on Ti surfaces does not alter the surface proprieties and allows an adequate interaction with cells involved in the re-osseointegration process such as fibroblasts and osteoblasts.
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Affiliation(s)
- Patricia Milagros Maquera-Huacho
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University(Unesp), Araraquara, SP, Brazil
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University(Unesp), Araraquara, São Paulo, Brazil
| | - Gabriel Garcia de Carvalho
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University(Unesp), Araraquara, SP, Brazil
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University(Unesp), Araraquara, São Paulo, Brazil
| | - Miguel Jafelicci
- Institute of Chemistry, Laboratory of Magnetic Materials and Colloids, São Paulo State University(Unesp), Araraquara, SP, Brazil
| | - Elcio Marcantonio
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University(Unesp), Araraquara, São Paulo, Brazil
| | - Denise Madalena Palomari Spolidorio
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University(Unesp), Araraquara, SP, Brazil
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University(Unesp), Araraquara, São Paulo, Brazil
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5
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Villapún VM, Man K, Carter L, Penchev P, Dimov S, Cox S. Laser texturing of additively manufactured implants: A tool to programme biological response. BIOMATERIALS ADVANCES 2023; 153:213574. [PMID: 37542913 DOI: 10.1016/j.bioadv.2023.213574] [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: 01/10/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/07/2023]
Abstract
The advent of additive manufacturing (AM) is rapidly shaping healthcare technologies pushing forward personalisation and enhanced implant functionalisation to improve clinical outcomes. AM techniques such as powder bed fusion (PBF) have been adopted despite the need to modify the as-built surface post manufacture. Medical device manufacturers have focused their efforts on refining various physical and chemical surface finishing approaches, however there is little consensus and some methods risk geometry alteration or contamination. This has led to a growing interest in laser texturing technologies to engineer the device surface. Herein, several bioinspired micro and nano textures were applied to laser PBF Ti-6Al-V4 substrates to alter physicochemical properties and in-turn we sought to understand what influences these alterations had on a human osteosarcoma cell line (MG63). Significant variations in roughness and time dependent contact angles were revealed between different patterns provide a tool to elicit desired biological responses. All surface treatments effectively enhanced early cell behaviour and in particular coverage was increased for the micro-textures. Influence of the patterns on cell differentiation was less consistent with alkaline phosphatase content increased only for the channel, grid and dual textures. While long term (21 days) mineralisation was found to be significantly enhanced in grids, dual, triangles and shark skin textures. Further regression analysis of all physicochemical and biological variables indicated that several properties should be used to strongly correlate cell behaviour, resulting in 82 % of the 21 day mineralisation dataset explained through a combination of roughness kurtosis and glycerol contact angle. Overall, this manuscript demonstrates the ability of laser texturing to offer tailored cell-surface interactions, which can be tuned to offer a tool to drive functional customisation of anatomically customised medical devices.
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Affiliation(s)
- Victor M Villapún
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, United Kingdom.
| | - Kenny Man
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center, Utrecht GA 3508, the Netherlands
| | - Luke Carter
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Pavel Penchev
- Department of Mechanical Engineering, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Stefan Dimov
- Department of Mechanical Engineering, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Sophie Cox
- School of Chemical Engineering, University of Birmingham, Edgbaston B15 2TT, United Kingdom.
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Torres-Sanchez C, Alabort E, Herring O, Bell H, Tam CY, Yang S, Conway PP. Multidimensional analysis for the correlation of physico-chemical attributes to osteoblastogenesis in TiNbZrSnTa alloys. BIOMATERIALS ADVANCES 2023; 153:213572. [PMID: 37566936 DOI: 10.1016/j.bioadv.2023.213572] [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: 05/18/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023]
Abstract
Data-enabled approaches that complement experimental testing offer new capabilities to investigate the interplay between chemical, physical and mechanical attributes of alloys and elucidate their effect on biological behaviours. Reported here, instead of physical causation, statistical correlations were used to study the factors responsible for the adhesion, proliferation and maturation of pre-osteoblasts MC3T3-E1 cultured on Titanium alloys. Eight alloys with varying wt% of Niobium, Zirconium, Tin and Tantalum (Ti- (2-22 wt%)Nb- (5-20 wt%)Zr- (0-18 wt%)Sn- (0-14 wt%)Ta) were designed to achieve exemplars of allotropes (incl., metastable-β, β + α', α″). Following confirmation of their compositions (ICP, EDX) and their crystal structure (XRD, SEM), their compressive bulk properties were measured and their surface features characterised (XPS, SFE). Because these alloys are intended for the manufacture of implantable orthopaedic devices, the correlation focuses on the effect of surface properties on cellular behaviour. Physico-chemical attributes were paired to biological performance, and these highlight the positive interdependencies between oxide composition and proliferation (esp. Ti4+), and maturation (esp. Zr4+). The correlation reveals the negative effect of oxide thickness, esp. TiOx and TaOx on osteoblastogenesis. This study also shows that the characterisation of the chemical state and elemental electronic structure of the alloys' surface is more predictive than physical properties, namely SFE and roughness.
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Affiliation(s)
- C Torres-Sanchez
- Multifunctional Materials Manufacturing Lab, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3TU Loughborough, Leics, UK.
| | - E Alabort
- Alloyed Ltd., Unit 15, Oxford Industrial Park, Yarnton OX5 1QU, UK
| | - O Herring
- Multifunctional Materials Manufacturing Lab, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3TU Loughborough, Leics, UK
| | - H Bell
- Multifunctional Materials Manufacturing Lab, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3TU Loughborough, Leics, UK
| | - C Y Tam
- Multifunctional Materials Manufacturing Lab, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3TU Loughborough, Leics, UK
| | - S Yang
- Multifunctional Materials Manufacturing Lab, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3TU Loughborough, Leics, UK
| | - P P Conway
- Multifunctional Materials Manufacturing Lab, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, LE11 3TU Loughborough, Leics, UK
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Lopes VR, Birgersson U, Manivel VA, Hulsart-Billström G, Gallinetti S, Aparicio C, Hong J. Human Whole Blood Interactions with Craniomaxillofacial Reconstruction Materials: Exploring In Vitro the Role of Blood Cascades and Leukocytes in Early Healing Events. J Funct Biomater 2023; 14:361. [PMID: 37504856 PMCID: PMC10381968 DOI: 10.3390/jfb14070361] [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: 06/13/2023] [Revised: 07/03/2023] [Accepted: 07/05/2023] [Indexed: 07/29/2023] Open
Abstract
The present study investigated early interactions between three alloplastic materials (calcium phosphate (CaP), titanium alloy (Ti), and polyetheretherketone (PEEK) with human whole blood using an established in vitro slide chamber model. After 60 min of contact with blood, coagulation (thrombin-antithrombin complexes, TAT) was initiated on all test materials (Ti > PEEK > CaP), with a significant increase only for Ti. All materials showed increased contact activation, with the KK-AT complex significantly increasing for CaP (p < 0.001), Ti (p < 0.01), and PEEK (p < 0.01) while only CaP demonstrated a notable rise in KK-C1INH production (p < 0.01). The complement system had significant activation across all materials, with CaP (p < 0.0001, p < 0.0001) generating the most pronounced levels of C3a and sC5b-9, followed by Ti (p < 0.001, p < 0.001) and lastly, PEEK (p < 0.001, p < 0.01). This activation correlated with leukocyte stimulation, particularly myeloperoxidase release. Consequently, the complement system may assume a more significant role in the early stages post implantation in response to CaP materials than previously recognized. Activation of the complement system and the inevitable activation of leukocytes might provide a more favorable environment for tissue remodeling and repair than has been traditionally acknowledged. While these findings are limited to the early blood response, complement and leukocyte activation suggest improved healing outcomes, which may impact long-term clinical outcomes.
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Affiliation(s)
- Viviana R Lopes
- OssDsign AB, SE-754 50 Uppsala, Sweden
- Department of Medicinal Chemistry, Translational Imaging, Uppsala University, SE-751 83 Uppsala, Sweden
| | - Ulrik Birgersson
- Department of Clinical Science, Intervention and Technology, Division of Imaging and Technology, Karolinska Institute, SE-141 52 Huddinge, Sweden
- Department of Clinical Neuroscience, Neurosurgical Section, Karolinska University Hospital, SE-171 77 Stockholm, Sweden
| | - Vivek Anand Manivel
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology (IGP), Uppsala University, SE-751 85 Uppsala, Sweden
| | - Gry Hulsart-Billström
- Department of Medicinal Chemistry, Translational Imaging, Uppsala University, SE-751 83 Uppsala, Sweden
| | - Sara Gallinetti
- OssDsign AB, SE-754 50 Uppsala, Sweden
- Department of Engineering Sciences, Applied Materials Science Section, Uppsala University, SE-751 03 Uppsala, Sweden
| | - Conrado Aparicio
- Faculty of Odontology, UIC Barcelona-International University of Catalonia, 08195 Barcelona, Spain
- IBEC-Institute for Bioengineering of Catalonia, 08028 Barcelona, Spain
| | - Jaan Hong
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology (IGP), Uppsala University, SE-751 85 Uppsala, Sweden
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Mehrabi M, Gardy J, Talebi FA, Farshchi A, Hassanpour A, Bayly AE. An investigation of the effect of powder flowability on the powder spreading in additive manufacturing. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2022.117997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Alavarse AC, Frachini ECG, Silva JB, Pereira RDS, Ulrich H, Petri DFS. Amino acid decorated xanthan gum coatings: Molecular arrangement and cell adhesion. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2022. [DOI: 10.1016/j.carpta.2022.100227] [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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10
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Surface Properties of Ti6Al7Nb Alloy: Surface Free Energy and Bacteria Adhesion. J Funct Biomater 2022; 13:jfb13010026. [PMID: 35323226 PMCID: PMC8954169 DOI: 10.3390/jfb13010026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 02/28/2022] [Accepted: 03/04/2022] [Indexed: 11/30/2022] Open
Abstract
The laser micro-machining was carried out on a station equipped with a TruMicro 5325c laser emitting ultraviolet radiation (343 nm wavelength) in picosecond pulses. On the surface of the Ti6Al7Nb alloy, dimple texturing with a constant diameter of ~200 μm, different depths (from ~5 to ~78 μm) and density (from 10% to 50%) were produced. The value of surface free energy was determined with the Owens–Wendt method using two measuring liquids: distilled water and diodomethane. The Staphylococcus epidermidis strain was used to test the adhesion of bacteria. It was found that the surface free energy value is influenced by both of the texture parameters (density, depth). The density also affects the potential for biofilm formation. Based on the analysis, it was shown that with an increase in surface free energy, the number of adhering microorganisms increases exponentially. Moreover, the study shows that there is a correlation between the number of adhering microorganisms and surface free energy.
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De Santis S, Rossi E, Sebastiani M, Sennato S, Bemporad E, Orsini M. A Nanoindentation Approach for Time-Dependent Evaluation of Surface Free Energy in Micro- and Nano-Structured Titanium. MATERIALS 2021; 15:ma15010287. [PMID: 35009432 PMCID: PMC8746133 DOI: 10.3390/ma15010287] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/24/2021] [Accepted: 12/24/2021] [Indexed: 02/07/2023]
Abstract
Surface free energy (SFE) of titanium surfaces plays a significant role in tissue engineering, as it affects the effectiveness and long-term stability of both active coatings and functionalization and the establishment of strong bonds to the newly growing bone. A new contact–mechanics methodology based on high-resolution non-destructive elastic contacting nanoindentation is applied here to study SFE of micro- and nano-structured titanium surfaces, right after their preparation and as a function of exposure to air. The effectiveness of different surface treatments in enhancing SFE is assessed. A time-dependent decay of SFE within a few hours is observed, with kinetics related to the sample preparation. The fast, non-destructive method adopted allowed for SFE measurements in very hydrophilic conditions, establishing a reliable comparison between surfaces with different properties.
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Affiliation(s)
- Serena De Santis
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy;
- Correspondence:
| | - Edoardo Rossi
- Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy; (E.R.); (M.S.); (E.B.)
| | - Marco Sebastiani
- Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy; (E.R.); (M.S.); (E.B.)
| | - Simona Sennato
- CNR-ISC Sede Sapienza, Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;
| | - Edoardo Bemporad
- Engineering Department, Università Degli Studi Roma Tre, Via Della Vasca Navale 79, 00146 Rome, Italy; (E.R.); (M.S.); (E.B.)
| | - Monica Orsini
- Department of Industrial, Electronic and Mechanical Engineering, Roma Tre University, Via Vito Volterra 62, 00146 Rome, Italy;
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Genistein loaded into microporous surface of nano tantalum/PEEK composite with antibacterial effect regulating cellular response in vitro, and promoting osseointegration in vivo. J Mech Behav Biomed Mater 2021; 125:104972. [PMID: 34794044 DOI: 10.1016/j.jmbbm.2021.104972] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/04/2021] [Accepted: 11/08/2021] [Indexed: 12/14/2022]
Abstract
Poly(ether-ether-ketone) (PEEK) with good biocompatibility exhibits high mechanical strengths but bioinert. In addition, tantalum (Ta) possesses outstanding osteogenesis but high density and elastic modulus, and cost. In this study, by blending Ta nanoparticles with PEEK, Ta/PEEK composite (TP) was prepared, which was then treated by concentrated sulfuric acid to form a microporous surface containing Ta particles on TP (TPS). Moreover, genistein (GS) with antibacterial property was loaded into the microporous surface of TPS (TPSG). Compared with TP, the surface properties (e.g., surface roughness and hydrophilicity) of TPS was obviously improved because of the microporous surface including Ta nanoparticles. Moreover, TPS showed low antibacterial properties because of presence of sulfonic group while TPSG exhibited excellent antibacterial properties due to GS loaded into the microporous surface. Furthermore, compared with TP, TPS obviously promoted attachment and proliferation of MG63 cells, while TPSG with GS remarkably inducing osteogenic differentiation of the cells compared with TPS in vitro. Moreover, in comparison with TP, TPS with optimized surface properties promoted new bone regeneration and osseointegration, while TPSG loading GS further enhanced bone regeneration as well as osseointegration in vivo. In summary, the GS loaded into microporous surface including Ta nanoparticles of TPSG exhibited antibacterial and osteogenic activity, which would have great potential for bone tissue repair.
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13
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Booth MA, Pope L, Sherrell PC, Stacey A, Tran PA, Fox KE. Polycrystalline diamond coating on 3D printed titanium scaffolds: Surface characterisation and foreign body response. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 130:112467. [PMID: 34702542 DOI: 10.1016/j.msec.2021.112467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/10/2021] [Accepted: 09/27/2021] [Indexed: 11/16/2022]
Abstract
Titanium-based implants are the leading material for orthopaedic surgery, due to their strength, versatility, fabrication via additive manufacturing and invoked biological response. However, the interface between the implant and the host tissue requires improvement to better integrate the implant material and mitigate foreign body response. The interface can be manipulated by changing the surface energy, chemistry, and topography of the Titanium-based implant. Recently, polycrystalline diamond (PCD) has emerged as an exciting coating material for 3D printed titanium scaffolds showing enhanced mammalian cell functions while inhibiting bacterial attachment in vitro. In this study, we performed in-depth characterisation of PCD coatings investigating the surface topography, thickness, surface energy, and compared its foreign body response in vivo with uncoated titanium scaffold. Coating PCD onto titanium scaffolds resulted in a similar microscale surface roughness (RMS(PCD-coated) = 24 μm; RMS(SLM-Ti) = 28 μm), increased nanoscale roughness (RMS(PCD-coated) = 35 nm; RMS(SLM-Ti) = 66 nm) and a considerable decrease in surface free energy (E(PCD-coated) = 4 mN m-1; E(SLM-Ti) = 16 mN m-1). These surface property changes were supported by X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy as corresponding to observed surface chemistry changes induced by the coating. The underlying mechanism of how the diamond coatings chemical and physical properties changes the wettability of implants was examined. In vivo, the coated scaffolds induced similar level of fibrous encapsulation with uncoated scaffolds. This study thus provides further insight into the physicochemical characteristics of PCD coatings, adding evidence to the promising potential of PCD-coatings of medical implants.
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Affiliation(s)
- Marsilea A Booth
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia
| | - Leon Pope
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia
| | - Peter C Sherrell
- Department of Chemical Engineering, The Faculty of Engineering and Information Technology, University of Melbourne, Australia
| | - Alastair Stacey
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia; ARC Centre of Excellence for Nanoscale BioPhotonics, School of Science, RMIT University, VIC 3000, Australia
| | - Phong A Tran
- Interface Science and Materials Engineering Group, School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia; Centre for Biomedical Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.
| | - Kate E Fox
- Center for Additive Manufacturing, School of Engineering, RMIT University, VIC 3000, Australia.
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Bangavadi Munivenkatappa M, Franklin MEE, Dhotre AV, Pushpadass HA, Shivanand, Anthonysamy A, Mandhyan PK, Patil PG. Mitigation of fouling during milk processing in polytetrafluoroethylene‐titanium dioxide coated plate heat exchanger. J FOOD PROCESS ENG 2021. [DOI: 10.1111/jfpe.13836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Ananta V. Dhotre
- Dairy Engineering Section ICAR‐National Dairy Research Institute, Southern Regional Station Bengaluru India
| | - Heartwin A. Pushpadass
- Dairy Engineering Section ICAR‐National Dairy Research Institute, Southern Regional Station Bengaluru India
| | - Shivanand
- Dairy Engineering Section ICAR‐National Dairy Research Institute, Southern Regional Station Bengaluru India
| | | | | | - Prashant G. Patil
- ICAR‐Central Institute for Research on Cotton Technology Mumbai India
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15
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Babu S, Dousti B, Lee GS, Lee JB. Conversion of Polymer Surfaces into Nonwetting Substrates for Liquid Metal Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8139-8147. [PMID: 34180680 DOI: 10.1021/acs.langmuir.1c00689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid metal-based applications are limited by the wetting nature of polymers toward surface-oxidized gallium-based liquid metals. This work demonstrates that a 120 s CF4/O2 plasma treatment of polymer surfaces-such as poly(dimethylsiloxane) (PDMS), SU8, S1813, and polyimide-converts these previously wetting surfaces to nonwetting surfaces for gallium-based liquid metals. Static and advancing contact angles of all plasma-treated surfaces are >150°, and receding contact angles are >140°, with contact angle hysteresis in the range of 8.2-10.7°, collectively indicating lyophobic behavior. This lyophobic behavior is attributed to the plasma simultaneously fluorinating the surface while creating sub-micron scale roughness. X-ray photoelectron spectroscopy (XPS) results show a large presence of fluorine at the surface, indicating fluorination of surface methyl groups, while atomic force microscopy (AFM) results show that plasma-treated surfaces have an order of magnitude greater surface roughness than pristine surfaces, indicating a Cassie-Baxter state, which suggests that surface roughness is the primary cause of the nonwetting property, with surface chemistry making a smaller contribution. Solid surface free energy values for all plasma-treated surfaces were found to be generally lower than the pristine surfaces, indicating that this process can be used to make similar classes of polymers nonwetting to gallium-based liquid metals.
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Affiliation(s)
- Sachin Babu
- Department of Electrical and Computer Engineering, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Behnoush Dousti
- Department of Electrical and Computer Engineering, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Gil Sik Lee
- Department of Electrical and Computer Engineering, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Jeong-Bong Lee
- Department of Electrical and Computer Engineering, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
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16
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Mohammadi H, Muhamad N, Sulong AB, Ahmadipour M. Recent advances on biofunctionalization of metallic substrate using ceramic coating: How far are we from clinically stable implant? J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.01.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Crowe JD, Hao P, Pattathil S, Pan H, Ding SY, Hodge DB, Jensen JK. Xylan Is Critical for Proper Bundling and Alignment of Cellulose Microfibrils in Plant Secondary Cell Walls. FRONTIERS IN PLANT SCIENCE 2021; 12:737690. [PMID: 34630488 PMCID: PMC8495263 DOI: 10.3389/fpls.2021.737690] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 08/24/2021] [Indexed: 05/07/2023]
Abstract
Plant biomass represents an abundant and increasingly important natural resource and it mainly consists of a number of cell types that have undergone extensive secondary cell wall (SCW) formation. These cell types are abundant in the stems of Arabidopsis, a well-studied model system for hardwood, the wood of eudicot plants. The main constituents of hardwood include cellulose, lignin, and xylan, the latter in the form of glucuronoxylan (GX). The binding of GX to cellulose in the eudicot SCW represents one of the best-understood molecular interactions within plant cell walls. The evenly spaced acetylation and 4-O-methyl glucuronic acid (MeGlcA) substitutions of the xylan polymer backbone facilitates binding in a linear two-fold screw conformation to the hydrophilic side of cellulose and signifies a high level of molecular specificity. However, the wider implications of GX-cellulose interactions for cellulose network formation and SCW architecture have remained less explored. In this study, we seek to expand our knowledge on this by characterizing the cellulose microfibril organization in three well-characterized GX mutants. The selected mutants display a range of GX deficiency from mild to severe, with findings indicating even the weakest mutant having significant perturbations of the cellulose network, as visualized by both scanning electron microscopy (SEM) and atomic force microscopy (AFM). We show by image analysis that microfibril width is increased by as much as three times in the severe mutants compared to the wild type and that the degree of directional dispersion of the fibrils is approximately doubled in all the three mutants. Further, we find that these changes correlate with both altered nanomechanical properties of the SCW, as observed by AFM, and with increases in enzymatic hydrolysis. Results from this study indicate the critical role that normal GX composition has on cellulose bundle formation and cellulose organization as a whole within the SCWs.
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Affiliation(s)
- Jacob D. Crowe
- Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, MI, United States
| | - Pengchao Hao
- Department of Chemistry, Michigan State University, East Lansing, MI, United States
| | - Sivakumar Pattathil
- Complex Carbohydrate Research Center, The University of Georgia, Athens, GA, United States
| | - Henry Pan
- Department of Chemical Engineering, University of Texas, Austin, TX, United States
| | - Shi-You Ding
- Department of Plant Biology, Michigan State University, East Lansing, MI, United States
- Department of Energy Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, United States
| | - David B. Hodge
- Department of Chemical & Biological Engineering, Montana State University, Bozeman, MT, United States
| | - Jacob Krüger Jensen
- Section for Plant Glycobiology, Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
- *Correspondence: Jacob Krüger Jensen
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Cichomski M, Prowizor M, Kowalczyk DA, Sikora A, Batory D, Dudek M. Comparison of the Physicochemical Properties of Carboxylic and Phosphonic Acid Self-Assembled Monolayers Created on a Ti-6Al-4V Substrate. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E5137. [PMID: 33202592 PMCID: PMC7698310 DOI: 10.3390/ma13225137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 11/26/2022]
Abstract
This study compared the tribological properties in nano- and millinewton load ranges of Ti‑6Al-4V surfaces that were modified using self-assembled monolayers (SAMs) of carboxylic and phosphonic acids. The effectiveness of the creation of SAMs with the use of the liquid phase deposition (LPD) technique was monitored by the contact angle measurement, the surface free energy (SFE) calculation, X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared spectroscopy (FTIR) measurements. The obtained results indicated that more stable and well-ordered layers, which were characterized by the lowest values of the coefficient of friction, adhesion, and wear rate, were obtained using phosphonic acid as a surface modifier. Based on the obtained results, it was found that the Ti-6Al-4V alloy modified by phosphonic acid would be the most advantageous for practical applications, especially in micro- and nanoelectromechanical systems (MEMS/NEMS).
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Affiliation(s)
- Michal Cichomski
- Department of Materials Technology and Chemistry, University of Lodz, Faculty of Chemistry, Pomorska 163, 90-236 Lodz, Poland;
| | - Milena Prowizor
- Department of Materials Technology and Chemistry, University of Lodz, Faculty of Chemistry, Pomorska 163, 90-236 Lodz, Poland;
| | - Dorota Anna Kowalczyk
- Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Lodz, Pomorska 149/153, 90-236 Lodz, Poland;
| | - Andrzej Sikora
- Department of Nanometrology, Faculty of Microsystem Electronics and Photonics, Wroclaw University of Science and Technology, Janiszewskiego 11/17, 50-372 Wrocław, Poland;
| | - Damian Batory
- Department of Vehicles and Fundamentals in Machine Design, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland;
| | - Mariusz Dudek
- Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-924 Lodz, Poland;
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Fontoura CP, Rodrigues MM, Garcia CSC, dos Santos Souza K, Henriques JAP, Zorzi JE, Roesch-Ely M, Aguzzoli C. Hollow cathode plasma nitriding of medical grade Ti6Al4V: A comprehensive study. J Biomater Appl 2020; 35:353-370. [DOI: 10.1177/0885328220935378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Ti6Al4V used in biomedical applications still has several surface-related problems, such as poor bone compatibility and low wear resistance. In this work, the formation of a protective layer of titanium nitride obtained by plasma treatment in hollow cathode was studied, and the best experimental conditions were verified by a statistical factorial design of experiments. The samples were characterized in terms of their physical and chemical properties, correlating the effects of time (min) and temperature (°C). An achieved ideal condition was further analysed in terms of in vitro cytotoxicity, micro-abrasion, and electrochemical properties. The carried-out assessment has shown that nitrided condition has an improvement in wettability, microhardness, along with TixNy formation and roughness increment, when compared to pristine condition.
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Affiliation(s)
- Cristian Padilha Fontoura
- Área do Conhecimento de Ciências Exatas e Engenharias, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais (PPGMAT), Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Melissa Machado Rodrigues
- Área do Conhecimento de Ciências Exatas e Engenharias, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais (PPGMAT), Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | | | | | | | - Janete Eunice Zorzi
- Área do Conhecimento de Ciências Exatas e Engenharias, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais (PPGMAT), Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Mariana Roesch-Ely
- Instituto de Biotecnologia, Universidade de Caxias do Sul, Caxias do Sul, Brazil
| | - Cesar Aguzzoli
- Área do Conhecimento de Ciências Exatas e Engenharias, Programa de Pós-Graduação em Engenharia e Ciência dos Materiais (PPGMAT), Universidade de Caxias do Sul, Caxias do Sul, Brazil
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20
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Laser-Based Ablation of Titanium-Graphite Composite for Dental Application. MATERIALS 2020; 13:ma13102312. [PMID: 32443423 PMCID: PMC7288093 DOI: 10.3390/ma13102312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/10/2020] [Accepted: 05/15/2020] [Indexed: 12/17/2022]
Abstract
Biocompatible materials with excellent mechanical properties as well as sophisticated surface morphology and chemistry are required to satisfy the requirements of modern dental implantology. In the study described in this article, an industrial-grade fibre nanosecond laser working at 1064 nm wavelength was used to micromachine a new type of a biocompatible material, Ti-graphite composite prepared by vacuum low-temperature extrusion of hydrogenated-dehydrogenated (HDH) titanium powder mixed with graphite flakes. The effect of the total laser energy delivered to the material per area on the machined surface morphology, roughness, surface element composition and phases transformations was investigated and evaluated by means of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), confocal laser-scanning microscopy (CLSM) and X-ray diffraction analysis (XRD). The findings illustrate that the amount of thermal energy put to the working material has a remarkable effect on the machined surface properties, which is discussed from the aspect of the contact properties of dental implants.
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Sreelekshmy BR, Vijayan A, Basheer R, Arunima SR, Ameen Sha M, Riyas AH, Bhagya TC, Manu MN, Shibli SMA. Zn Wetted CeO 2 Based Composite Galvanization: An Effective Route To Combat Biofouling. ACS APPLIED BIO MATERIALS 2019; 2:3774-3789. [PMID: 35021351 DOI: 10.1021/acsabm.9b00404] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The present paper reports for the first time the development and application of novel Zn wetted CeO2 (Zn/CeO2) composite galvanic zinc coating to combat microbial induced corrosion (MIC). Zinc metal-metal interaction causes the effective incorporation of composite into the galvanic coating and accordingly increases the active sites for antibiofouling activity. The developed coatings are explored for their anticorrosion/antibiofouling characteristics toward MIC induced by cultured seawater consortia. Enhanced antibiofouling activity of the composite galvanic coating is achieved due to the tuned content of 28 wt % Zn and 34 wt % of Ce. High charge transfer resistance as high as 4.0 × 1014 Ω cm2 and low double layer capacitance as low as 3.99 × 10-8 F are achieved by tuning the structure and composition of the coating. The synergistic effect of Zn and Ce ensures the stability and corrosion resistance of the coatings in a corrosive bacterial environment. Evident decreases in the bacterial attachment and biofilm formation are illustrated using antibiofouling assay. The antibiofouling activity is attributed to the effective reduction of Ce4+ to Ce3+ and the shuttling characteristics of oxidation state of CeO2. This impairs the cellular respiration and results in bacterial death. Thus, it can be used as an effective coating to protect the steel based equipment in corrosive marine environments to combat marine microorganisms and their interactions. The present study also paves the scope for exploration of similar effective protective systems.
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Yilbas B, Ali H, Al-Sharafi A, Al-Qahtani H. Laser processing of Ti6Al4V alloy: wetting state of surface and environmental dust effects. Heliyon 2019; 5:e01211. [PMID: 30839931 PMCID: PMC6365620 DOI: 10.1016/j.heliyon.2019.e01211] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/22/2018] [Accepted: 02/01/2019] [Indexed: 11/19/2022] Open
Abstract
Laser processing of Ti6Al4V alloy surface, via repetitive pulses, is realized incorporating the nitrogen assisting gas. The texture characteristics of the surface and wetting state are analyzed. The free energy of the laser treated surface is estimated. The influence of the dust particles on the treated and untreated surfaces is examined. The solution formed due to water condensate on the dust particles is evaluated. The adhesion of the mud dried solution on the treated and untreated surfaces is assessed through determining the tangential force required for the removal of the solution from the surface. The findings demonstrate that the high power laser repetitive pulse heating results in formation of the hieratically distributed micro/nano pillars on the workpiece surface. The wetting state of the processed surface remains hydrophilic because of the large gap size between the micro/nano pillars. The free energy of the laser textured surface is similar to that obtained for the TiN coated surfaces, which is because of the nitride compounds developed during the processing. The dried liquid solution strongly adheres at the surface and the force needed for removing the dried liquid solution is almost four times of the friction force at the surface. The liquid solution gives rise to locally scattered shallow pit sites on as received surface. This phenomenon does not occur for the laser treated surface, which is related to the passive layer developed on the surface.
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Meng J, Dong X, Zhao Y, Xu R, Bai X, Zhou H. Fabrication of a Low Adhesive Superhydrophobic Surface on Ti6Al4V Alloys Using TiO₂/Ni Composite Electrodeposition. MICROMACHINES 2019; 10:mi10020121. [PMID: 30781879 PMCID: PMC6413079 DOI: 10.3390/mi10020121] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/31/2019] [Accepted: 02/12/2019] [Indexed: 12/23/2022]
Abstract
A superhydrophobic surface with low adhesion and good wear resistance was fabricated on Ti6Al4V substrates via TiO2/Ni composite electrodeposition, and subsequently modified with a fluoroalkylsilane (FAS) film. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and optical contact angle measurements were used to characterize the surface morphologies, chemical compositions, and surface wettability. The superhydrophobicity of the as-prepared surface results from the fabrication of a hierarchical structure and the assembly of low-surface energy fluorinated components. The as-prepared surface had a water contact angle as high as 162.6° and a sliding angle close to 1.8°. Scratch and abrasion tests showed that the superhydrophobic coating provided a superior wear resistance and stable mechanical abrasion protection. In addition, the influence of processing conditions, such as working voltage, deposited time, pH value, and TiO2 concentration, was also investigated.
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Affiliation(s)
- Jianbing Meng
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Xiaojuan Dong
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Yugang Zhao
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Rufeng Xu
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Xue Bai
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Haian Zhou
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
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Dong X, Meng J, Zhou H, Xu R, Bai X, Zhang H. Fabrication of Adhesive Resistance Surface with Low Wettability on Ti6Al4V Alloys by Electro-Brush Plating. MICROMACHINES 2019; 10:mi10010064. [PMID: 30669272 PMCID: PMC6356935 DOI: 10.3390/mi10010064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 01/10/2019] [Accepted: 01/15/2019] [Indexed: 12/05/2022]
Abstract
Anti-adhesive Ni coatings with low wettability were successfully fabricated on Ti6Al4V substrates via an electro-brush plating method, and subsequently modified with a fluoroalkylsilane (FAS) film. The surface morphology, chemical compositions, and wettability of the as-prepared coatings were measured using scanning electron microscopy (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectrophotometry (FTIR), and contact angle measurements. The results showed that the surface of Ti6Al4V substrate was endowed with flower-like structures. Each flower-like cluster was constituted by a large number of Ni ions. After surface modification of FAS, the as-prepared Ti6Al4V surface had a water contact angle as high as 151.5°, a sliding angle close to 2.1°, and a solid surface energy as low as 0.97 mJ/m2. Potentiodynamic polarization tests showed that the Ni coating could provide a stable corrosion protection. In addition, the effects of processing conditions, such as working voltage, relative velocity, electrolyte concentration, and processing time, were investigated. The mechanism of the adhesive resistance was proposed, and the low wettability of Ti6Al4V surfaces was explained by Cassie–Baxter model. As a result, it was necessary to reduce the fraction of the solid–liquid interface in order to achieve anti-adhesive surface.
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Affiliation(s)
- Xiaojuan Dong
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Jianbing Meng
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Haian Zhou
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Rufeng Xu
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Xue Bai
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
| | - Haiyun Zhang
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China.
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Coating of Sandblasted and Acid-Etched Dental Implants With Tantalum Using Vacuum Plasma Spraying. IMPLANT DENT 2018; 27:202-208. [PMID: 29394178 DOI: 10.1097/id.0000000000000727] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE The objective was to prepare tantalum (Ta)-coated sandblasted and acid-etched (SLA) dental implants using vacuum plasma spraying (VPS) and to analyze their morphologies. MATERIALS AND METHODS Twelve SLA implants were coated with Ta using VPS. The topographies of the coatings and Ta/SLA surface interfaces were examined using scanning electron microscopy. The thickness at 4 locations for 6 Ta-coated and 6 uncoated SLA implants and pore sizes of the neck, central, and root areas of Ta-coated implants were measured. SPSS v20.0 was used for statistical analysis. RESULTS The Ta coatings were rough and consisted of pitted structures with various pore sizes; no cracks were observed. The Ta/SLA surface interface was tightly bonded. The 95% confidence interval of the Ta coating thickness was (114.0759, 129.3574). The maximal pore diameter was concentrated at 200 to 400 nm. CONCLUSION SLA dental implants were successfully coated with Ta using VPS. The nanoporous structure of these implants may facilitate osseointegration compared with uncoated SLA implants.
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Hasan A, Saxena V, Pandey LM. Surface Functionalization of Ti6Al4V via Self-assembled Monolayers for Improved Protein Adsorption and Fibroblast Adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3494-3506. [PMID: 29489380 DOI: 10.1021/acs.langmuir.7b03152] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Although metallic biomaterials find numerous biomedical applications, their inherent low bioactivity and poor osteointegration had been a great challenge for decades. Surface modification via silanization can serve as an attractive method for improving the aforementioned properties of such substrates. However, its effect on protein adsorption/conformation and subsequent cell adhesion and spreading has rarely been investigated. This work reports the in-depth study of the effect of Ti6Al4V surface functionalization on protein adsorption and cell behavior. We prepared self-assembled monolayers (SAMs) of five different surfaces (amine, octyl, mixed [1:1 ratio of amine:octyl], hybrid, and COOH). Synthesized surfaces were characterized by Fourier transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy, contact angle goniometry, profilometry, and field emission scanning electron microscopy (FESEM). Quantification of adsorbed mass of bovine serum albumin (BSA) and fibronectin (FN) was determined on different surfaces along with secondary structure analysis. The adsorbed amount of BSA was found to increase with an increase in surface hydrophobicity with the maximum adsorption on the octyl surface while the reverse trend was detected for FN adsorption, having the maximum adsorbed mass on the COOH surface. The α-helix content of adsorbed BSA increased on amine and COOH surfaces while it decreased for other surfaces. Whereas increasing β-turn content of the adsorbed FN with the increase in the surface hydrophobicity was observed. In FN, RGD loops are located in the β-turn and consequently the increase in Δ adhered cells (%) was predominantly increased with the increasing Δ β-turn content (%). We found hybrid surfaces to be the most promising surface modifier due to maximum cell adhesion (%) and proliferation, larger nuclei area, and the least cell circularity. Bacterial density increased with the increasing hydrophobicity and was found maximum for the amine surface (θ = 63 ± 1°) which further decreased with the increasing hydrophobicity. Overall, modified surfaces (in particular hybrid surface) showed better protein adsorption and cell adhesion properties as compared to unmodified Ti6Al4V and can be potentially used for tissue engineering applications.
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Affiliation(s)
- Abshar Hasan
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
| | - Varun Saxena
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
| | - Lalit M Pandey
- Bio-Interface & Environmental Engineering Lab, Department of Biosciences and Bioengineering , Indian Institute of Technology Guwahati , Guwahati , Assam 781039 , India
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Salvador DG, Marcolin P, Beltrami LVR, Brandalise RN, Kunst SR. Influence of the pretreatment and curing of alkoxysilanes on the protection of the titanium-aluminum-vanadium alloy. J Appl Polym Sci 2017. [DOI: 10.1002/app.45470] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- D. G. Salvador
- Laboratory of Corrosion and Surface Protection; University of Caxias do Sul; 1130 Francisco Getúlio Vargas Street Caxias do Sul Rio Grande do Sul 95070-560 Brazil
| | - P. Marcolin
- Graduate Program in Process Engineering and Technologies; University of Caxias do Sul; 1130 Francisco Getúlio Vargas Street Caxias do Sul Rio Grande do Sul 95070-560 Brazil
| | - L. V. R. Beltrami
- Research Laboratory in Corrosion; Federal University of Rio Grande do Sul; 9500 Bento Gonçalves Avenue Porto Alegre Rio Grande do Sul 90040-060 Brazil
| | - R. N. Brandalise
- Graduate Program in Process Engineering and Technologies; University of Caxias do Sul; 1130 Francisco Getúlio Vargas Street Caxias do Sul Rio Grande do Sul 95070-560 Brazil
| | - S. R. Kunst
- Graduate Program in Process Engineering and Technologies; University of Caxias do Sul; 1130 Francisco Getúlio Vargas Street Caxias do Sul Rio Grande do Sul 95070-560 Brazil
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Cordeiro JM, Beline T, Ribeiro ALR, Rangel EC, da Cruz NC, Landers R, Faverani LP, Vaz LG, Fais LMG, Vicente FB, Grandini CR, Mathew MT, Sukotjo C, Barão VAR. Development of binary and ternary titanium alloys for dental implants. Dent Mater 2017; 33:1244-1257. [PMID: 28778495 DOI: 10.1016/j.dental.2017.07.013] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 07/10/2017] [Accepted: 07/13/2017] [Indexed: 01/21/2023]
Abstract
OBJECTIVE The aim of this study was to develop binary and ternary titanium (Ti) alloys containing zirconium (Zr) and niobium (Nb) and to characterize them in terms of microstructural, mechanical, chemical, electrochemical, and biological properties. METHODS The experimental alloys - (in wt%) Ti-5Zr, Ti-10Zr, Ti-35Nb-5Zr, and Ti-35Nb-10Zr - were fabricated from pure metals. Commercially pure titanium (cpTi) and Ti-6Al-4V were used as controls. Microstructural analysis was performed by means of X-ray diffraction and scanning electron microscopy. Vickers microhardness, elastic modulus, dispersive energy spectroscopy, X-ray excited photoelectron spectroscopy, atomic force microscopy, surface roughness, and surface free energy were evaluated. The electrochemical behavior analysis was conducted in a body fluid solution (pH 7.4). The albumin adsorption was measured by the bicinchoninic acid method. Data were evaluated through one-way ANOVA and the Tukey test (α=0.05). RESULTS The alloying elements proved to modify the alloy microstructure and to enhance the mechanical properties, improving the hardness and decreasing the elastic modulus of the binary and ternary alloys, respectively. Ti-Zr alloys displayed greater electrochemical stability relative to that of controls, presenting higher polarization resistance and lower capacitance. The experimental alloys were not detrimental to albumin adsorption. SIGNIFICANCE The experimental alloys are suitable options for dental implant manufacturing, particularly the binary system, which showed a better combination of mechanical and electrochemical properties without the presence of toxic elements.
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Affiliation(s)
- Jairo M Cordeiro
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA
| | - Thamara Beline
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA
| | - Ana Lúcia R Ribeiro
- Faculdade de Ciências do Tocantins (FACIT), Rua D 25, Qd 11, Lt 10, Setor George Yunes, Araguaína, Tocantins 77818-650, Brazil; Faculdade de Ciências Humanas, Econômicas e da Saúde de Araguaína/Instituto Tocantinense Presidente Antônio Carlos (FAHESA/ITPAC), Av. Filadélfia, 568, Araguaína, Tocantins 77816-540, Brazil
| | - Elidiane C Rangel
- Univ Estadual Paulista (UNESP), Engineering College, Laboratory of Technological Plasmas, Av. Três de Março, 511, Sorocaba, São Paulo 18087-180, Brazil
| | - Nilson C da Cruz
- Univ Estadual Paulista (UNESP), Engineering College, Laboratory of Technological Plasmas, Av. Três de Março, 511, Sorocaba, São Paulo 18087-180, Brazil
| | - Richard Landers
- University of Campinas (UNICAMP), Institute of Physics Gleb Wataghin, Cidade Universitária Zeferino Vaz-Barão Geraldo, Campinas, São Paulo 13083-859, Brazil
| | - Leonardo P Faverani
- Univ Estadual Paulista (UNESP), Aracatuba Dental School, Department of Surgery and Integrated Clinic, R. José Bonifácio, 1193, Aracatuba, São Paulo 16015-050, Brazil
| | - Luís Geraldo Vaz
- Univ Estadual Paulista (UNESP), Araraquara Dental School, Department of Dental Materials and Prosthodontics, R. Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Laiza M G Fais
- Univ Estadual Paulista (UNESP), Araraquara Dental School, Department of Dental Materials and Prosthodontics, R. Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Fabio B Vicente
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; Universidade Paulista (UNIP), Av. Nossa Sra. de Fátima, 9-50, Bauru, São Paulo 17017-337, Brazil
| | - Carlos R Grandini
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; Univ Estadual Paulista (UNESP), Laboratório de Anelasticidade e Biomateriais, Av. Eng. Luiz Edmundo Carrijo Coube, Bauru, São Paulo 17033-360, Brazil
| | - Mathew T Mathew
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; University of Illinois College of Medicine at Rockford, Department of Biomedical Sciences, 1601 Parkview Avenue, Rockford, IL 61107, USA; University of Illinois at Chicago, College of Dentistry, Department of Restorative Dentistry, 801 S Paulina, Chicago, IL 60612, USA
| | - Cortino Sukotjo
- Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA; University of Illinois at Chicago, College of Dentistry, Department of Restorative Dentistry, 801 S Paulina, Chicago, IL 60612, USA
| | - Valentim A R Barão
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontology, Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil; Institute of Biomaterials, Tribocorrosion and Nanomedicine (IBTN), Brazil and USA.
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Peyre J, Hamraoui A, Faustini M, Humblot V, Baccile N. Surface-induced assembly of sophorolipids. Phys Chem Chem Phys 2017; 19:15227-15238. [DOI: 10.1039/c7cp01339f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The surface self-assembly properties of acidic sophorolipids, a bolaform microbial glycolipid with pH-responsive properties, were studied based on the chemical nature of the support and pH of the solution.
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Affiliation(s)
- Jessie Peyre
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| | - Ahmed Hamraoui
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| | - Marco Faustini
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
| | - Vincent Humblot
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Laboratoire de Réactivité de Surface
- UMR 7197
| | - Niki Baccile
- Sorbonne Universités
- UPMC Univ Paris 06
- CNRS
- Collège de France UMR 7574
- Chimie de la Matière Condensée de Paris
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