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Nan Z, Floquet P, Combes D, Tendero C, Castelain M. Surface Conditioning Effects on Submerged Optical Sensors: A Comparative Study of Fused Silica, Titanium Dioxide, Aluminum Oxide, and Parylene C. SENSORS (BASEL, SWITZERLAND) 2023; 23:9546. [PMID: 38067919 PMCID: PMC10708880 DOI: 10.3390/s23239546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023]
Abstract
Optical sensors excel in performance but face efficacy challenges when submerged due to potential surface colonization, leading to signal deviation. This necessitates robust solutions for sustained accuracy. Protein and microorganism adsorption on solid surfaces is crucial in antibiofilm studies, contributing to conditioning film and biofilm formation. Most studies focus on surface characteristics (hydrophilicity, roughness, charge, and composition) individually for their adhesion impact. In this work, we tested four materials: silica, titanium dioxide, aluminum oxide, and parylene C. Bovine Serum Albumin (BSA) served as the biofouling conditioning model, assessed with X-ray photoelectron spectroscopy (XPS). Its effect on microorganism adhesion (modeled with functionalized microbeads) was quantified using a shear stress flow chamber. Surface features and adhesion properties were correlated via Principal Component Analysis (PCA). Protein adsorption is influenced by nanoscale roughness, hydrophilicity, and likely correlated with superficial electron distribution and bond nature. Conditioning films alter the surface interaction with microbeads, affecting hydrophilicity and local charge distribution. Silica shows a significant increase in microbead adhesion, while parylene C exhibits a moderate increase, and titanium dioxide shows reduced adhesion. Alumina demonstrates notable stability, with the conditioning film minimally impacting adhesion, which remains low.
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Affiliation(s)
- Zibin Nan
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
| | - Pascal Floquet
- LGC, Université de Toulouse, CNRS, INPT, UPS—ENSIACET 4, allée Émile Monso, 31030 Toulouse, France;
| | - Didier Combes
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
| | - Claire Tendero
- CIRIMAT, Université de Toulouse, CNRS, INPT, UPS—ENSIACET 4, allée Émile Monso, 31030 Toulouse, France;
| | - Mickaël Castelain
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
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2
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Sandua X, Rivero PJ, Conde A, Esparza J, Rodríguez R. A Comparative Study in the Design of TiO 2 Assisted Photocatalytic Coatings Monitored by Controlling Hydrophilic Behavior and Rhodamine B Degradation. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2589. [PMID: 37048883 PMCID: PMC10095146 DOI: 10.3390/ma16072589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/16/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
This work presents a comparative study related to the photocatalytic efficiency associated with wettability measurements and organic dye degradation, as well as other relevant properties (i.e., corrosion resistance, roughness, wettability, and adhesion to a substrate). The photocatalytic precursors are titanium dioxide nanoparticles (TiO2 NPs) which are dispersed onto a polymeric electrospun fiber matrix by using three different deposition techniques such as electrospraying, spraying, and dip-coating, respectively. In this work, the host electrospun matrix is composed of poly(acrylic acid) fibers crosslinked with cyclodextrin (β-CD), which shows a good chemical affinity and stability with the other deposition techniques which are responsible for incorporating the TiO2 NPs. In order to evaluate the efficacy of each coating, the resultant photocatalytic activity has been monitored by two different tests. Firstly, the reduction in the water contact angle is appreciated, and secondly, the degradation of an organic dye (Rhodamine B) is observed under UV irradiation. In addition, the final roughness, adherence, and pitting corrosion potential have also been controlled in order to determine which solution provides the best combination of properties. Finally, the experimental results clearly indicate that the presence of TiO2 NPs deposited by the three techniques is enough to induce a super hydrophilic behavior after UV irradiation. However, there are notable differences in photocatalytic efficiency on the Rhodamine B as a function of the selected deposition technique.
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Affiliation(s)
- Xabier Sandua
- Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
| | - Pedro J. Rivero
- Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
| | - Ana Conde
- National Center for Metallurgical Research (CENIM-CSIC), Gregorio del Amo Avenue 8, 28040 Madrid, Spain
| | - Joseba Esparza
- Centre of Advanced Surface Engineering, AIN, 31191 Cordovilla, Spain
| | - Rafael Rodríguez
- Engineering Department, Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
- Institute for Advanced Materials and Mathematics (INAMAT2), Public University of Navarre, Campus Arrosadía s/n, 31006 Pamplona, Spain
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3
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Mansoor A, Khurshid Z, Khan MT, Mansoor E, Butt FA, Jamal A, Palma PJ. Medical and Dental Applications of Titania Nanoparticles: An Overview. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12203670. [PMID: 36296859 PMCID: PMC9611494 DOI: 10.3390/nano12203670] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 10/08/2022] [Accepted: 10/09/2022] [Indexed: 05/25/2023]
Abstract
Currently, titanium oxide (TiO2) nanoparticles are successfully employed in human food, drugs, cosmetics, advanced medicine, and dentistry because of their non-cytotoxic, non-allergic, and bio-compatible nature when used in direct close contact with the human body. These NPs are the most versatile oxides as a result of their acceptable chemical stability, lower cost, strong oxidation properties, high refractive index, and enhanced aesthetics. These NPs are fabricated by conventional (physical and chemical) methods and the latest biological methods (biological, green, and biological derivatives), with their advantages and disadvantages in this epoch. The significance of TiO2 NPs as a medical material includes drug delivery release, cancer therapy, orthopedic implants, biosensors, instruments, and devices, whereas their significance as a dental biomaterial involves dentifrices, oral antibacterial disinfectants, whitening agents, and adhesives. In addition, TiO2 NPs play an important role in orthodontics (wires and brackets), endodontics (sealers and obturating materials), maxillofacial surgeries (implants and bone plates), prosthodontics (veneers, crowns, bridges, and acrylic resin dentures), and restorative dentistry (GIC and composites).
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Affiliation(s)
- Afsheen Mansoor
- Department of Dental Material Sciences, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad 44080, Pakistan
| | - Zohaib Khurshid
- Department of Prosthodontics and Dental Implantology, College of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia;
| | - Muhammad Talal Khan
- Department of Dental Biomaterials, Bakhtawar Amin Medical and Dental College, Multan 60650, Pakistan;
| | - Emaan Mansoor
- Islamic International Dental College, Riphah International University, Islamabad 44000, Pakistan;
| | - Faaz Ahmad Butt
- Department of Materials Engineering, NED University of Engineering & Technology, Karachi 74200, Pakistan;
| | - Asif Jamal
- Department of Microbiology, Quaid-i-Azam University, Islamabad 45320, Pakistan;
| | - Paulo J. Palma
- Center for Innovation and Research in Oral Sciences (CIROS), Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal
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4
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Mori Y, Masahashi N, Aizawa T. A Review of Anodized TiNbSn Alloys for Improvement in Layer Quality and Application to Orthopedic Implants. MATERIALS 2022; 15:ma15155116. [PMID: 35897548 PMCID: PMC9331693 DOI: 10.3390/ma15155116] [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: 06/29/2022] [Revised: 07/15/2022] [Accepted: 07/21/2022] [Indexed: 02/01/2023]
Abstract
Titanium alloys are useful for application in orthopedic implants. However, complications, such as prosthetic infections and aseptic loosening, often occur after orthopedic devices are implanted. Therefore, innovation in surface modification techniques is essential to develop orthopedic materials with optimal properties at the biomaterial–bone interface. In this review, we present recent research on the improvement in the osteoconductivity and antibacterial effect of the Ti-33.6% Nb-4% Sn (TiNbSn) alloy by anodic oxidation and other related studies. TiNbSn alloys are excellent new titanium alloys with a low Young’s modulus, high tensile strength, and with gradient functional properties such as a thermally adjustable Young’s modulus and strength. Titanium dioxide (TiO2), when obtained by the anodic oxidation of a TiNbSn alloy, improves bone affinity and provides antibacterial performance owing to its photocatalytic activity. The safety of TiO2 and its strong bonding with metal materials make its method of preparation a promising alternative to conventional methods for improving the surface quality of orthopedic implants. Implementing anodization technology for TiNbSn alloys may alleviate orthopedic surgery-related complications, such as loosening, stress shielding, and infection after arthroplasty.
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Affiliation(s)
- Yu Mori
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan;
- Correspondence: ; Tel.: +81-22-717-7245; Fax: +81-22-717-7248
| | - Naoya Masahashi
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;
| | - Toshimi Aizawa
- Department of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan;
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Kurishima H, Mori Y, Ishii K, Inoue H, Mokudai T, Fujimori S, Itoi E, Hanada S, Masahashi N, Aizawa T. Antibacterial Activity of an Anodized TiNbSn Alloy Prepared in Sodium Tartrate Electrolyte. Front Bioeng Biotechnol 2022; 10:883335. [PMID: 35480976 PMCID: PMC9035674 DOI: 10.3389/fbioe.2022.883335] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, we anodized a TiNbSn alloy with low Young’s modulus in an electrolyte of sodium tartrate with and without hydrogen peroxide (H2O2). The photo-induced characteristics of the anodized alloy were analyzed for crystallinity and electrochemical conditions with comparisons to the effect with the addition of H2O2. The antibacterial activity was evaluated using methicillin-resistant Staphylococcus aureus and other pathogenic bacteria according to ISO 27447, and time decay antibacterial tests were also conducted. The anodized oxide had a porous microstructure with anatase- and rutile-structured titanium dioxide (TiO2). In contrast, the peaks of rutile-structured TiO2 were accelerated in the anodized TiNbSn alloy with H2O2. The formation of hydroxyl radicals and methylene blue breaching performance under ultraviolet irradiation was confirmed in the anodic oxide on TiNbSn alloy with and without H2O2. The anodic oxide on TiNbSn alloy had a robust antibacterial activity, and no significant difference was detected with or without H2O2. We conclude that anodized TiNbSn alloy with sodium tartrate electrolyte may be a functional biomaterial with a low Young’s modulus and an antibacterial function.
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Affiliation(s)
- Hiroaki Kurishima
- Department of Orthopedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yu Mori
- Department of Orthopedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- *Correspondence: Yu Mori,
| | - Keiko Ishii
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroyuki Inoue
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, Sakai, Japan
| | - Takayuki Mokudai
- Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Satoko Fujimori
- Department of Orthopedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Eiji Itoi
- Department of Orthopedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shuji Hanada
- Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Naoya Masahashi
- Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Toshimi Aizawa
- Department of Orthopedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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6
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Aref NS, Abdallah RM. Evaluation of Mechanical Properties and Antibacterial Activity of Nano Titania-Enriched Alkasite Restorative Material: An In Vitro Study. Open Dent J 2022. [DOI: 10.2174/18742106-v16-e2112130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
A biocompatible additive with the ability to establish antibacterial action for restorative materials without sacrificing their physical properties is always in demand. Nano titania (TiO2 nanoparticles) was shown to have antimicrobial action against a wide range of microorganisms. Alkasite is a modern esthetic restorative material that has outstanding properties; however, it is deficient in antibacterial activity.
Objective:
TiO2 nanoparticles (NPs) were included in alkasite, and both mechanical properties and antibacterial activity of the new formulations were assessed.
Materials and Methods:
Nano titania powder was coupled to alkasite powder in proportions of 3 and 5% (w/w). There were 105 specimens made in total. Evaluation parameters were compressive strength, surface microhardness, surface roughness, water sorption and solubility, and antibacterial activity. One and two-way ANOVA were used for the statistical analysis, followed by Tukey′s test (p<0.05).
Results:
Both ratios of nano titania, 3 and 5% (w/w), significantly increased compressive strength, antibacterial activity against different pathogens, and decreased water solubility of alkasite (p<0.05). Only 5% (w/w) nano titania-modified alkasite exhibited significant decrease in water sorption (p<0.05). Conversely, an insignificant increase in microhardness and surface roughness was observed with both ratios, 3 and 5% (w/w) of nano titania (p˃0.05).
Conclusion:
Nano titania seems to be a very promising complementary additive to the alkasite restorative material, capable of generating considerable antibacterial effectiveness while also enhancing certain mechanical properties.
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7
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Kumaravel V, Nair KM, Mathew S, Bartlett J, Kennedy JE, Manning HG, Whelan BJ, Leyland NS, Pillai SC. Antimicrobial TiO 2 nanocomposite coatings for surfaces, dental and orthopaedic implants. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2021; 416:129071. [PMID: 33642937 PMCID: PMC7899925 DOI: 10.1016/j.cej.2021.129071] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 02/13/2021] [Accepted: 02/16/2021] [Indexed: 05/03/2023]
Abstract
Engineering of self-disinfecting surfaces to constrain the spread of SARS-CoV-2 is a challenging task for the scientific community because the human coronavirus spreads through respiratory droplets. Titania (TiO2) nanocomposite antimicrobial coatings is one of the ideal remedies to disinfect pathogens (virus, bacteria, fungi) from common surfaces under light illumination. The photocatalytic disinfection efficiency of recent TiO2 nanocomposite antimicrobial coatings for surfaces, dental and orthopaedic implants are emphasized in this review. Mostly, inorganic metals (e.g. copper (Cu), silver (Ag), manganese (Mn), etc), non-metals (e.g. fluorine (F), calcium (Ca), phosphorus (P)) and two-dimensional materials (e.g. MXenes, MOF, graphdiyne) were incorporated with TiO2 to regulate the charge transfer mechanism, surface porosity, crystallinity, and the microbial disinfection efficiency. The antimicrobial activity of TiO2 coatings was evaluated against the most crucial pathogenic microbes such as Escherichia coli, methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis, Legionella pneumophila, Staphylococcus aureus, Streptococcus mutans, T2 bacteriophage, H1N1, HCoV-NL63, vesicular stomatitis virus, bovine coronavirus. Silane functionalizing agents and polymers were used to coat the titanium (Ti) metal implants to introduce superhydrophobic features to avoid microbial adhesion. TiO2 nanocomposite coatings in dental and orthopaedic metal implants disclosed exceptional bio-corrosion resistance, durability, biocompatibility, bone-formation capability, and long-term antimicrobial efficiency. Moreover, the commercial trend, techno-economics, challenges, and prospects of antimicrobial nanocomposite coatings are also discussed briefly.
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Affiliation(s)
- Vignesh Kumaravel
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo, Ireland
| | - Keerthi M Nair
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo, Ireland
| | - Snehamol Mathew
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo, Ireland
| | - John Bartlett
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo, Ireland
| | | | | | | | | | - Suresh C Pillai
- Nanotechnology and Bio-Engineering Research Group, Department of Environmental Science, School of Science, Institute of Technology Sligo, Ash Lane, Sligo, Ireland
- Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Ash Lane, Sligo, Ireland
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8
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Abstract
Titanium dioxide (TiO2) is widely used in various fields both in daily life and industry owing to its excellent photoelectric properties and its induced superwettability. Over the past several decades, various methods have been reported to improve the wettability of TiO2 and plenty of practical applications have been developed. The TiO2-derived materials with different morphologies display a variety of functions including photocatalysis, self-cleaning, oil-water separation, etc. Herein, various functions and applications of TiO2 with superwettability are summarized and described in different sections. First, a brief introduction about the discovery of photoelectrodes made of TiO2 is revealed. The ultra-fast spreading behaviors on TiO2 are shown in the part of ultra-fast spreading with superwettability. The part of controllable wettability introduces the controllable wettability of TiO2-derived materials and their related applications. Recent developments of interfacial photocatalysis and photoelectrochemical reactions with TiO2 are presented in the part of interfacial photocatalysis and photoelectrochemical reactions. The part of nanochannels for ion rectification describes ion transportation in nanochannels based on TiO2-derived materials. In the final section, a brief conclusion and a future outlook based on the superwettability of TiO2 are shown.
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9
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Wu XH, Liew YK, Mai CW, Then YY. Potential of Superhydrophobic Surface for Blood-Contacting Medical Devices. Int J Mol Sci 2021; 22:3341. [PMID: 33805207 PMCID: PMC8036518 DOI: 10.3390/ijms22073341] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 02/05/2023] Open
Abstract
Medical devices are indispensable in the healthcare setting, ranging from diagnostic tools to therapeutic instruments, and even supporting equipment. However, these medical devices may be associated with life-threatening complications when exposed to blood. To date, medical device-related infections have been a major drawback causing high mortality. Device-induced hemolysis, albeit often neglected, results in negative impacts, including thrombotic events. Various strategies have been approached to overcome these issues, but the outcomes are yet to be considered as successful. Recently, superhydrophobic materials or coatings have been brought to attention in various fields. Superhydrophobic surfaces are proposed to be ideal blood-compatible biomaterials attributed to their beneficial characteristics. Reports have substantiated the blood repellence of a superhydrophobic surface, which helps to prevent damage on blood cells upon cell-surface interaction, thereby alleviating subsequent complications. The anti-biofouling effect of superhydrophobic surfaces is also desired in medical devices as it resists the adhesion of organic substances, such as blood cells and microorganisms. In this review, we will focus on the discussion about the potential contribution of superhydrophobic surfaces on enhancing the hemocompatibility of blood-contacting medical devices.
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Affiliation(s)
- Xun Hui Wu
- School of Postgraduate Studies, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Yun Khoon Liew
- Department of Life Sciences, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Chun-Wai Mai
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Yoon Yee Then
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia;
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10
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Rodríguez-González V, Obregón S, Patrón-Soberano OA, Terashima C, Fujishima A. An approach to the photocatalytic mechanism in the TiO 2-nanomaterials microorganism interface for the control of infectious processes. APPLIED CATALYSIS. B, ENVIRONMENTAL 2020; 270:118853. [PMID: 32292243 PMCID: PMC7111711 DOI: 10.1016/j.apcatb.2020.118853] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/27/2020] [Accepted: 03/03/2020] [Indexed: 05/08/2023]
Abstract
The approach of this timely review considers the current literature that is focused on the interface nanostructure/cell-wall microorganism to understand the annihilation mechanism. Morphological studies use optical and electronic microscopes to determine the physical damage on the cell-wall and the possible cell lysis that confirms the viability and microorganism death. The key parameters of the tailoring the surface of the photoactive nanostructures such as the metal functionalization with bacteriostatic properties, hydrophilicity, textural porosity, morphology and the formation of heterojunction systems, can achieve the effective eradication of the microorganisms under natural conditions, ranging from practical to applications in environment, agriculture, and so on. However, to our knowledge, a comprehensive review of the microorganism/nanomaterial interface approach has rarely been conducted. The final remarks point the ideal photocatalytic way for the effective prevention/eradication of microorganisms, considering the resistance that the microorganism could develop without the appropriate regulatory aspects for human and ecosystem safety.
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Affiliation(s)
- Vicente Rodríguez-González
- Photocatalysis International Research Center, Research Institute for Science & Technology, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
- Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), División de Materiales Avanzados, Camino a la Presa San José 2055, Lomas 4a, Sección, 78216, San Luis Potosí, Mexico
| | - Sergio Obregón
- Universidad Autónoma de Nuevo León, UANL, CICFIM-Facultad de Ciencias Físico Matemáticas, Av. Universidad S/N, San Nicolás de los Garza, 66455, Nuevo León, Mexico
| | - Olga A. Patrón-Soberano
- Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), División de Biología Molecular, Camino a la Presa San José 2055, Lomas 4a, Sección, 78216, San Luis Potosí, Mexico
| | - Chiaki Terashima
- Photocatalysis International Research Center, Research Institute for Science & Technology, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Akira Fujishima
- Photocatalysis International Research Center, Research Institute for Science & Technology, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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11
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Parra-Ortiz E, Malekkhaiat Häffner S, Saerbeck T, Skoda MWA, Browning KL, Malmsten M. Oxidation of Polyunsaturated Lipid Membranes by Photocatalytic Titanium Dioxide Nanoparticles: Role of pH and Salinity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:32446-32460. [PMID: 32589394 DOI: 10.1021/acsami.0c08642] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In the present study, UV-induced membrane destabilization by TiO2 (anatase) nanoparticles was investigated by neutron reflectometry (NR), small-angle X-ray scattering (SAXS), quartz crystal microbalance with dissipation (QCM-D), dynamic light scattering (DLS), and ζ-potential measurements for phospholipid bilayers formed by zwitterionic palmitoyloleoylphosphatidylcholine (POPC) containing biologically relevant polyunsaturations. TiO2 nanoparticles displayed pH-dependent binding to such bilayers. Nanoparticle binding alone, however, has virtually no destabilizing effects on the lipid bilayers. In contrast, UV illumination in the presence of TiO2 nanoparticles activates membrane destabilization as a result of lipid oxidation caused by the generation of reactive oxygen species (ROS), primarily •OH radicals. Despite the short diffusion length characterizing these, the direct bilayer attachment of TiO2 nanoparticles was demonstrated to not be a sufficient criterion for an efficient UV-induced oxidation of bilayer lipids, the latter also depending on ROS generation in bulk solution. From SAXS and NR, minor structural changes were seen when TiO2 was added in the absence of UV exposure, or on UV exposure in the absence of TiO2 nanoparticles. In contrast, UV exposure in the presence of TiO2 nanoparticles caused large-scale structural transformations, especially at high ionic strength, including gradual bilayer thinning, lateral phase separation, increases in hydration, lipid removal, and potential solubilization into aggregates. Taken together, the results demonstrate that nanoparticle-membrane interactions ROS generation at different solution conditions act in concert to induce lipid membrane destabilization on UV exposure and that both of these need to be considered for understanding the performance of UV-triggered TiO2 nanoparticles in nanomedicine.
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Affiliation(s)
- Elisa Parra-Ortiz
- Department of Pharmacy, University of Copenhagen, Copenhagen DK-2100, Denmark
| | | | - Thomas Saerbeck
- Institut Laue-Langevin, CS 20156, Grenoble Cedex 9 38042, France
| | - Maximilian W A Skoda
- ISIS Pulsed Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell, Oxfordshire OX11 OQX, U.K
| | - Kathryn L Browning
- Department of Pharmacy, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Martin Malmsten
- Department of Pharmacy, University of Copenhagen, Copenhagen DK-2100, Denmark
- Department of Physical Chemistry 1, Lund University, Lund SE-221 00, Sweden
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12
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Synthesis of Titanium Dioxide via Surfactant-Assisted Microwave Method for Photocatalytic and Dye-Sensitized Solar Cells Applications. Catalysts 2020. [DOI: 10.3390/catal10050586] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, titania nanoparticles were obtained using the microwave-assisted technique. Moreover, different surfactants (PEG (Mn = 400), Pluronic P123 and Triton X−100) were used during the synthesis in order to determine their impact on the crystallinity and morphology of the final products. Subsequently, techniques such as XRD, SEM and TEM (performed in high contrast and high-resolution mode), diffuse reflectance spectroscopy (DRS), low temperature N2 sorption (BET model), FTIR and TGA were carried out. Based on the crystallinity analysis of the obtained materials, it was established that the addition of surfactants results in greater (PEG and Triton X−100) or smaller (Pluronic P123) average crystallite size. The main purpose of this study was to use the synthesized nanomaterials in the photodegradation process (in the UV light range) of the model organic pollutants – phenol (20 mg/L) and etodolac (15 mg/L). Furthermore, it was also pointed out that the dye-sensitized solar cells can be a second application for the synthesized titania nanomaterials. The photo-oxidation and photovoltaic tests have shown that the titanium dioxide obtained using the surfactant-assisted microwave method is characterized not only by better photodegradation efficiency of phenol and etodolac, but also by higher photocurrent density compared to the reference titania samples—the pristine TiO2 and commercial P25.
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Jafari S, Mahyad B, Hashemzadeh H, Janfaza S, Gholikhani T, Tayebi L. Biomedical Applications of TiO 2 Nanostructures: Recent Advances. Int J Nanomedicine 2020; 15:3447-3470. [PMID: 32523343 PMCID: PMC7234979 DOI: 10.2147/ijn.s249441] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 04/16/2020] [Indexed: 12/13/2022] Open
Abstract
Titanium dioxide (TiO2) nanostructures are one of the most plentiful compounds that have emerged in various fields of technology such as medicine, energy and biosensing. Various TiO2 nanostructures (nanotubes [NTs] and nanowires) have been employed in photoelectrochemical (PEC) biosensing applications, greatly enhancing the detection of targets. TiO2 nanostructures, used as reinforced material or coatings for the bare surface of titanium implants, are excellent additive materials to compensate titanium implants deficiencies-like poor surface interaction with surrounding tissues-by providing nanoporous surfaces and hierarchical structures. These nanostructures can also be loaded by diversified drugs-like osteoporosis drugs, anticancer and antibiotics-and used as local drug delivery systems. Furthermore, TiO2 nanostructures and their derivatives are new emerging antimicrobial agents to overcome human pathogenic microorganisms. However, like all other nanomaterials, toxicity and biocompatibility of TiO2 nanostructures must be considered. This review highlights recent advances, along with the properties and numerous applications of TiO2-based nanostructure compounds in nano biosensing, medical implants, drug delivery and antibacterial fields. Moreover, in the present study, some recent advances accomplished on the pharmaceutical applications of TiO2 nanostructures, as well as its toxicity and biocompatibility, are presented.
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Affiliation(s)
- Sevda Jafari
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
- Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Baharak Mahyad
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Islamic Republic of Iran
| | - Hadi Hashemzadeh
- Department of Nanobiotechnology, Tarbiat Modares University, Tehran, 14117, Islamic Republic of Iran
| | - Sajjad Janfaza
- Department of Nanobiotechnology, Tarbiat Modares University, Tehran, 14117, Islamic Republic of Iran
| | - Tooba Gholikhani
- Student Research Committee, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI53233, USA
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A Novel Approach to Synthesize TiO2 Nanoparticles: Biosynthesis by Using Streptomyces sp. HC1. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01486-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Photocatalysis as a Tool for in Vitro Drug Metabolism Simulation: Multivariate Comparison of Twelve Metal Oxides on a Set of Twenty Model Drugs. Catalysts 2019. [DOI: 10.3390/catal10010026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The constant development in the area of medicinal substances on the market and their subsequent progress in the field of drug analysis has become one of the reasons for the search for alternative, cheaper, and faster methods to determine the metabolism pathways of new molecular entities (NMEs). The simulation of transformation processes using photocatalysis is considered to be one of the promising methods. Although its effectiveness has been proven, the research has so far focused especially on titanium dioxide, while a more accurate comparison of the suitability of different photocatalysts in terms of their use in drug metabolism studies has not been performed. For this purpose, a set of twelve metal oxides was prepared and their photocatalytic efficiency in the direction of drug metabolism mimicking was checked on a model mixture of twenty medicinal substances differing both in chemical structure and pharmacological properties. Incubation with human liver microsomes (HLMs) was used as the reference method. The metabolic profiles obtained with the use of LC-MS analysis were compared using multidimensional chemometric techniques; and the graphic presentation of the results in the form of PCA plot and cluster dendrogram enabled their detailed interpretation and discussion. All tested photocatalysts confirmed their effectiveness. However, the exact outcome of the study indicate advantage of the WO3-assisted photocatalysis over other metal oxides.
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Kulka MW, Donskyi IS, Wurzler N, Salz D, Özcan Ö, Unger WES, Haag R. Mussel-Inspired Multivalent Linear Polyglycerol Coatings Outperform Monovalent Polyethylene Glycol Coatings in Antifouling Surface Properties. ACS APPLIED BIO MATERIALS 2019; 2:5749-5759. [DOI: 10.1021/acsabm.9b00786] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Michaël W. Kulka
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Ievgen S. Donskyi
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Nina Wurzler
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Dirk Salz
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße12, 28359 Bremen, Germany
| | - Özlem Özcan
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Wolfgang E. S. Unger
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Rainer Haag
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
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Devaraj H, Aw KC, McDaid AJ. Review of functional materials for potential use as wearable infection sensors in limb prostheses. Biomed Eng Lett 2019; 10:43-61. [PMID: 32175129 DOI: 10.1007/s13534-019-00132-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/30/2019] [Accepted: 09/17/2019] [Indexed: 12/31/2022] Open
Abstract
The fundamental goal of prosthesis is to achieve optimal levels of performance and enhance the quality of life of amputees. Socket type prostheses have been widely employed despite their known drawbacks. More recently, the advent of osseointegrated prostheses have demonstrated potential to be a better alternative to socket prosthesis eliminating most of the drawbacks of the latter. However, both socket and osseointegrated limb prostheses are prone to superficial infections during use. Infection prone skin lesions from frictional rubbing of the socket against the soft tissue are a known problem of socket type prosthesis. Osseointegration, on the other hand, results in an open wound at the implant-stump interface. The integration of infection sensors in prostheses to detect and prevent infections is proposed to enhance quality of life of amputees. Pathogenic volatiles having been identified to be a potent stimulus, this paper reviews the current techniques in the field of infection sensing, specifically focusing on identifying portable and flexible sensors with potential to be integrated into prosthesis designs. Various sensor architectures including but not limited to sensors fabricated from conducting polymers, carbon polymer composites, metal oxide semiconductors, metal organic frameworks, hydrogels and synthetic oligomers are reviewed. The challenges and their potential integration pathways that can enhance the possibilities of integrating these sensors into prosthesis designs are analysed.
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Affiliation(s)
- Harish Devaraj
- Department of Mechanical Engineering, Faculty of Engineering, The University of Auckland, Auckland, New Zealand
| | - Kean C Aw
- Department of Mechanical Engineering, Faculty of Engineering, The University of Auckland, Auckland, New Zealand
| | - Andrew J McDaid
- Department of Mechanical Engineering, Faculty of Engineering, The University of Auckland, Auckland, New Zealand
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18
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Alkyd resin based hydrophilic self-cleaning surface with self-refreshing behaviour as single step durable coating. J Colloid Interface Sci 2018; 531:628-641. [PMID: 30059914 DOI: 10.1016/j.jcis.2018.07.089] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 07/19/2018] [Accepted: 07/20/2018] [Indexed: 11/24/2022]
Abstract
Herein, we reported the photo-catalytic degradation/anti-bacterial property of Ag-doped ZnO nanoparticles (SDZO Nps) prepared by a facile gel-combustion technique and its self-cleaning/self-refreshing/self-disinfectant behaviour while on impregnating as pigment into the alkyd resin based coating. The influence of doping Ag (1% & 2%) with ZnO has been evaluated in terms of crystal structure, morphology, optical properties, etc. using X-ray diffraction analysis, Field Emission Scanning Electron Microscope, UV-Vis analysis, and Photoluminescence spectra. The photo-catalytic degradation of crystal violet solution by SDZO Nps is spectroscopically followed employing UV-Vis spectroscopy. From the obtained results, the rate of degradation of 1% SDZO Nps is found higher than that of other samples under sunlight illumination; degrading 1 mg of crystal violet in 30 min. Thus, implementing the synergic effect of nano ZnO and the doped Ag provides a suitable pathway for the development of high efficient photo-catalyst. Further, alkyd resin based self-cleaning coating is formulated using 1% SDZO Nps as pigment along with other additives; the contents are milled to form a homogeneous mixture by high energy ball milling technique. Crystal violet solution coated over dried alkyd coating gets decolorized on exposure to sunlight indicating the mineralization of pollutants and proves the fact that the as obtained coating possess self-cleaning nature. Besides the self-cleaning property, the coating exhibits self-refreshing property which is essential for the long lasting self-cleaning activity. Further, the disinfectant properties of 1% SDZO Nps and 1% SDZO Nps impregnated coating have been evaluated against gram negative Escherichia coli bacterial strain. The acquired experimental outcomes suggest the potential use of self-cleaning coating to keep the environment clean and hygienic economically.
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19
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Shakeri A, Yip D, Badv M, Imani SM, Sanjari M, Didar TF. Self-Cleaning Ceramic Tiles Produced via Stable Coating of TiO₂ Nanoparticles. MATERIALS 2018; 11:ma11061003. [PMID: 29899252 PMCID: PMC6025286 DOI: 10.3390/ma11061003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 06/03/2018] [Accepted: 06/08/2018] [Indexed: 11/21/2022]
Abstract
The high photocatalytic power of TiO2 nanoparticles has drawn great attention in environmental and medical applications. Coating surfaces with these particles enables us to benefit from self-cleaning properties and decomposition of pollutants. In this paper, two strategies have been introduced to coat ceramic tiles with TiO2 nanoparticles, and the self-cleaning effect of the surfaces on degradation of an organic dye under ultraviolent (UV) exposure is investigated. In the first approach, a simple one-step heat treatment method is introduced for coating, and different parameters of the heat treatment process are examined. In the second method, TiO2 nanoparticles are first aminosilanized using (3-Aminopropyl)triethoxysilane (APTES) treatment followed by their covalently attachment onto CO2 plasma treated ceramic tiles via N-(3-Dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC) and N-Hydroxysuccinimide (NHS) chemistry. We monitor TiO2 nanoparticle sizes throughout the coating process using dynamic light scattering (DLS) and characterize developed surfaces using X-ray photoelectron spectroscopy (XPS). Moreover, hydrophilicity of the coated surfaces is quantified using a contact angle measurement. It is shown that applying a one-step heat treatment process with the optimum temperature of 200 °C for 5 h results in successful coating of nanoparticles and rapid degradation of dye in a short time. In the second strategy, the APTES treatment creates a stable covalent coating, while the photocatalytic capability of the particles is preserved. The results show that coated ceramic tiles are capable of fully degrading the added dyes under UV exposure in less than 24 h.
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Affiliation(s)
- Amid Shakeri
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada.
| | - Darren Yip
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada.
| | - Maryam Badv
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada.
| | - Sara M Imani
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada.
| | - Mehdi Sanjari
- Nanophyll Inc., 175 Longwood Rd South, Hamilton, ON L8P 0A1, Canada.
| | - Tohid F Didar
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L7, Canada.
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada.
- Institute for Infectious Disease Research (IIDR), McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada.
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20
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LewisOscar F, Nithya C, Alharbi SA, Alharbi NS, Thajuddin N. In vitro and in silico attenuation of quorum sensing mediated pathogenicity in Pseudomonas aeruginosa using Spirulina platensis. Microb Pathog 2018; 116:246-256. [DOI: 10.1016/j.micpath.2018.01.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 01/19/2018] [Accepted: 01/29/2018] [Indexed: 12/25/2022]
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21
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Arciola CR, Alvi FI, An YH, Campoccia D, Montanaro L. Implant Infection and Infection Resistant Materials: A Mini Review. Int J Artif Organs 2018; 28:1119-25. [PMID: 16353118 DOI: 10.1177/039139880502801109] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Implant infection is an aggressive, often irreducible post-surgical infection. It remains the primary cause of implant failure. Bacterial contamination during surgery and subsequent adhesion onto biomaterial surface of opportunistic microorganisms, such as staphylococcal species, exopolysaccharidic slimes or specific adhesins, initiates the implant infection. Pathogenesis of periprosthestic infection is the focus of studies aimed at developing infection resistant materials.
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Affiliation(s)
- C R Arciola
- Research Unit on Implant Infections, Rizzoli Orthopedic Institute, Bologna, Italy.
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22
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Qiu Y, Zhang N, An YH, Wen X. Biomaterial Strategies to Reduce Implant-Associated Infections. Int J Artif Organs 2018; 30:828-41. [DOI: 10.1177/039139880703000913] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Although the prophylaxis in controlling sterility within the operating room environment has been greatly improved, implant-associated infection is still one of the most serious complications in implant surgeries due to the existence of immune depression in the peri-implant area. The antibacterial ability of materials themselves logically becomes an important factor in preventing implant-associated infections. With the understanding of the pathogenesis of implant-associated infections, many approaches have been developed through providing an anti-adhesive surface, delivering antibacterial agents to disrupt cell-cell communication and preventing bacteria aggregation or biofilm formation, or killing bacteria directly (lysing the cell membrane). In this article, we review the current strategies in improving the antibacterial ability of materials to prevent implant infection and further present promising tactics in materials design and applications.
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Affiliation(s)
- Y. Qiu
- Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina - USA
| | - N. Zhang
- Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina - USA
- Department of Cell Biology and Anatomy, Medical University of South Carolina, Charleston, South Carolina - USA
| | - Y. H. An
- Department of Orthopedic Surgery, Medical University of South Carolina, Charleston, South Carolina - USA
| | - X. Wen
- Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina - USA
- Department of Cell Biology and Anatomy, Medical University of South Carolina, Charleston, South Carolina - USA
- Department of Orthopedic Surgery, Medical University of South Carolina, Charleston, South Carolina - USA
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23
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Agafonov AV, Galkina OL. Solution process-based technologies: A new way for textile nanofunctionalization. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217060445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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24
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Torras-Rosell A, Johannsen SR, Dirscherl K, Daviðsdóttir S, Jeppesen CS, Louring S, Andersen IH. Comparing the photocatalytic activity of TiO 2 at macro- and microscopic scales. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:12683-12690. [PMID: 27837468 PMCID: PMC5418309 DOI: 10.1007/s11356-016-7887-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 10/10/2016] [Indexed: 06/06/2023]
Abstract
This study focuses on the characterization of photocatalytic TiO2 coatings using Kelvin probe force microscopy. While most photocatalytic experiments are carried out at a macroscopic scale, Kelvin probe force microscopy is a microscopic technique that is surface sensitive. In order to link microscale results to macroscopic experiments, a simple method to establish the relation between Kelvin probe force microscopy and electrochemical measurements is presented by the calibration of a reference sample consisting of epitaxial deposited Cu-Ni-Au that is used as a transfer standard. The photocatalytic properties of TiO2 at macro- and microscopic scales are investigated by comparing photocatalytic degradation of acetone and electrochemical experiments to Kelvin probe force microscopy. The good agreement between the macro- and microscopic experiments suggests that Kelvin probe force microscopy can be a valuable tool towards the understanding, standardization and design of TiO2-based solutions in photocatalytic applications.
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Affiliation(s)
- Antoni Torras-Rosell
- DFM A/S, Danish National Metrology Institute, Matematiktorvet 307, Kongens Lyngby, DK-2800, Denmark.
| | | | - Kai Dirscherl
- DFM A/S, Danish National Metrology Institute, Matematiktorvet 307, Kongens Lyngby, DK-2800, Denmark
| | - Svava Daviðsdóttir
- Materials and Surface Engineering, Department of Mechanical Engineering, Technical University of Denmark, Produktionstorvet 425, Kongens Lyngby, DK-2800, Denmark
| | - Christian Sloth Jeppesen
- Tribology Centre, Danish Technological Institute, DTI, Kongsvang Allé 29, Aarhus, DK-8000, Denmark
| | - Sascha Louring
- Tribology Centre, Danish Technological Institute, DTI, Kongsvang Allé 29, Aarhus, DK-8000, Denmark
| | - Inge Hald Andersen
- Tribology Centre, Danish Technological Institute, DTI, Kongsvang Allé 29, Aarhus, DK-8000, Denmark
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25
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Francolini I, Vuotto C, Piozzi A, Donelli G. Antifouling and antimicrobial biomaterials: an overview. APMIS 2017; 125:392-417. [PMID: 28407425 DOI: 10.1111/apm.12675] [Citation(s) in RCA: 158] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 01/14/2017] [Indexed: 12/12/2022]
Abstract
The use of implantable medical devices is a common and indispensable part of medical care for both diagnostic and therapeutic purposes. However, as side effect, the implant of medical devices quite often leads to the occurrence of difficult-to-treat infections, as a consequence of the colonization of their abiotic surfaces by biofilm-growing microorganisms increasingly resistant to antimicrobial therapies. A promising strategy to combat device-related infections is based on anti-infective biomaterials that either repel microbes, so they cannot attach to the device surfaces, or kill them in the surrounding areas. In general, such biomaterials are characterized by antifouling coatings, exhibiting low adhesion or even repellent properties towards microorganisms, or antimicrobial coatings, able to kill microbes approaching the surface. In this light, the present overview will address the development in the last two decades of antifouling and antimicrobial biomaterials designed to potentially limit the initial stages of microbial adhesion, as well as the microbial growth and biofilm formation on medical device surfaces.
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Affiliation(s)
| | - Claudia Vuotto
- Microbial Biofilm Laboratory, IRCCS Fondazione Santa Lucia, Rome
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26
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Zane A, Zuo R, Villamena FA, Rockenbauer A, Digeorge Foushee AM, Flores K, Dutta PK, Nagy A. Biocompatibility and antibacterial activity of nitrogen-doped titanium dioxide nanoparticles for use in dental resin formulations. Int J Nanomedicine 2016; 11:6459-6470. [PMID: 27980404 PMCID: PMC5147409 DOI: 10.2147/ijn.s117584] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The addition of antibacterial functionality to dental resins presents an opportunity to extend their useful lifetime by reducing secondary caries caused by bacterial recolonization. In this study, the potential efficacy of nitrogen-doped titanium dioxide nanoparticles for this purpose was determined. Nitrogen doping was carried out to extend the ultraviolet absorbance into longer wavelength blue light for increased biocompatibility. Titanium dioxide nanoparticles (approximately 20-30 nm) were synthesized with and without nitrogen doping using a sol-gel method. Ultraviolet-Visible spectroscopy indicated a band of trap states, with increasing blue light absorbance as the concentration of the nitrogen dopant increased. Electron paramagnetic resonance measurements indicated the formation of superoxide and hydroxyl radicals upon particle exposure to visible light and oxygen. The particles were significantly toxic to Escherichia coli in a dose-dependent manner after a 1-hour exposure to a blue light source (480 nm). Intracellular reactive oxygen species assay demonstrated that the particles caused a stress response in human gingival epithelial cells when exposed to 1 hour of blue light, though this did not result in detectable release of cytokines. No decrease in cell viability was observed by water-soluble tetrazolium dye assay. The results show that nitrogen-doped titanium dioxide nanoparticles have antibacterial activity when exposed to blue light, and are biocompatible at these concentrations.
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Affiliation(s)
- Andrew Zane
- Biomaterials and Environmental Surveillance Department, Naval Medical Research Unit San Antonio, Joint Base San Antonio, Fort Sam Houston, San Antonio, TX
| | | | - Frederick A Villamena
- Department of Biological Chemistry and Pharmacology, Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Antal Rockenbauer
- Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry; Department of Physics, MTA-BME Condensed Matter Research Group, Budapest University of Technology and Economics, Budapest, Hungary
| | - Ann Marie Digeorge Foushee
- Biomaterials and Environmental Surveillance Department, Naval Medical Research Unit San Antonio, Joint Base San Antonio, Fort Sam Houston, San Antonio, TX
| | - Kristin Flores
- Biomaterials and Environmental Surveillance Department, Naval Medical Research Unit San Antonio, Joint Base San Antonio, Fort Sam Houston, San Antonio, TX
| | | | - Amber Nagy
- Biomaterials and Environmental Surveillance Department, Naval Medical Research Unit San Antonio, Joint Base San Antonio, Fort Sam Houston, San Antonio, TX
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Gas-phase photocatalytic activity of sputter-deposited anatase TiO2 films: Effect of 〈0 0 1〉 preferential orientation, surface temperature and humidity. J Catal 2016. [DOI: 10.1016/j.jcat.2015.12.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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Photocatalytical Antibacterial Activity of Mixed-Phase TiO2 Nanocomposite Thin Films against Aggregatibacter actinomycetemcomitans. BIOMED RESEARCH INTERNATIONAL 2015; 2015:705871. [PMID: 26576430 PMCID: PMC4631860 DOI: 10.1155/2015/705871] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 09/30/2015] [Indexed: 11/18/2022]
Abstract
Mixed-phase TiO2 nanocomposite thin films consisting of anatase and rutile prepared on commercially pure Ti sheets via the electrochemical anodization and annealing treatments were investigated in terms of their photocatalytic activity for antibacterial use around dental implants. The resulting films were characterized by scanning electron microscopy (SEM), and X-ray diffraction (XRD). The topology was assessed by White Light Optical Profiling (WLOP) in the Vertical Scanning Interferometer (VSI) mode. Representative height descriptive parameters of roughness Ra and Rz were calculated. The photocatalytic activity of the resulting TiO2 films was evaluated by the photodegradation of Rhodamine B (RhB) dye solution. The antibacterial ability of the photocatalyst was examined by Aggregatibacter actinomycetemcomitans suspensions in a colony-forming assay. XRD showed that anatase/rutile mixed-phase TiO2 thin films were predominantly in anatase and rutile that were 54.6 wt% and 41.9 wt%, respectively. Craters (2–5 µm) and protruding hills (10–50 µm) on Ti substrates were produced after electrochemical anodization with higher Ra and Rz surface roughness values. Anatase/rutile mixed-phase TiO2 thin films showed 26% photocatalytic decolorization toward RhB dye solution. The number of colonizing bacteria on anatase/rutile mixed-phase TiO2 thin films was decreased significantly in vitro. The photocatalyst was effective against A. actinomycetemcomitans colonization.
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Wang CX, Braendle A, Menyo MS, Pester CW, Perl EE, Arias I, Hawker CJ, Klinger D. Catechol-based layer-by-layer assembly of composite coatings: a versatile platform to hierarchical nano-materials. SOFT MATTER 2015; 11:6173-6178. [PMID: 26151660 DOI: 10.1039/c5sm01374g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Inspired by the marine mussel's ability to adhere to surfaces underwater, an aqueous catechol-based dip coating platform was developed. Using a catechol-functionalized polyacrylamide binder in combination with inorganic nanoparticles enables the facile fabrication of robust composite coatings via a layer-by-layer process. This modular assembly of well-defined building blocks provides a versatile alternative to electrostatic driven approaches with layer thickness and refractive indices being readily tunable. The platform nature of this approach enables the fabrication of hierarchically ordered nano-materials such as Bragg stacks.
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Affiliation(s)
- C X Wang
- Materials Research Laboratory, University of California Santa Barbara, CA 93106, USA.
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Byrne JA, Dunlop PSM, Hamilton JWJ, Fernández-Ibáñez P, Polo-López I, Sharma PK, Vennard ASM. A review of heterogeneous photocatalysis for water and surface disinfection. Molecules 2015; 20:5574-615. [PMID: 25830789 PMCID: PMC6272584 DOI: 10.3390/molecules20045574] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 03/16/2015] [Accepted: 03/18/2015] [Indexed: 11/16/2022] Open
Abstract
Photo-excitation of certain semiconductors can lead to the production of reactive oxygen species that can inactivate microorganisms. The mechanisms involved are reviewed, along with two important applications. The first is the use of photocatalysis to enhance the solar disinfection of water. It is estimated that 750 million people do not have accessed to an improved source for drinking and many more rely on sources that are not safe. If one can utilize photocatalysis to enhance the solar disinfection of water and provide an inexpensive, simple method of water disinfection, then it could help reduce the risk of waterborne disease. The second application is the use of photocatalytic coatings to combat healthcare associated infections. Two challenges are considered, i.e., the use of photocatalytic coatings to give “self-disinfecting” surfaces to reduce the risk of transmission of infection via environmental surfaces, and the use of photocatalytic coatings for the decontamination and disinfection of medical devices. In the final section, the development of novel photocatalytic materials for use in disinfection applications is reviewed, taking account of materials, developed for other photocatalytic applications, but which may be transferable for disinfection purposes.
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Affiliation(s)
- John Anthony Byrne
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | - Patrick Stuart Morris Dunlop
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | - Jeremy William John Hamilton
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
| | | | | | - Preetam Kumar Sharma
- Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK.
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Bogdan J, Jackowska-Tracz A, Zarzyńska J, Pławińska-Czarnak J. Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties. NANOSCALE RESEARCH LETTERS 2015; 10:57. [PMID: 25852354 PMCID: PMC4385004 DOI: 10.1186/s11671-015-0753-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/12/2015] [Indexed: 05/27/2023]
Abstract
Nanotechnology is a field of science that is nowadays developing in a dynamic way. It seems to offer almost endless opportunities of contribution to many areas of economy and human activity, in general. Thanks to nanotechnology, the so-called nanomaterials can be designed. They present structurally altered materials, with their physical, chemical and biological properties entirely differing from properties of the same materials manufactured in microtechnology. Nanotechnology creates a unique opportunity to modify the matter at the level of atoms and particles. Therefore, it has become possible to obtain items displaying new, useful properties, i.e. self-disinfecting and self-cleaning surfaces. Those surfaces are usually covered by a thin layer of a photocatalyst. The role of the photocatalyst is most of the time performed by the nanosized titanium dioxide (nano-TiO2). Excitation of nano-TiO2 by ultraviolet radiation initiates advanced oxidation processes and reactions leading to the creation of oxygen vacancies that bind water particles. As a result, photocatalytic surfaces are given new properties. Those properties can then be applied in a variety of disciplines, such as medicine, food hygiene, environmental protection or building industry. Practically, the applications include inactivation of microorganisms, degradation of toxins, removing pollutants from buildings and manufacturing of fog-free windows or mirrors.
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Affiliation(s)
- Janusz Bogdan
- Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Agnieszka Jackowska-Tracz
- Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Joanna Zarzyńska
- Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Joanna Pławińska-Czarnak
- Department of Food Hygiene and Public Health Protection, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
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Wang L, Chen X, Cao X, Xu J, Zuo B, Zhang L, Wang X, Yang J, Yao Y. Fabrication of polymer brush surfaces with highly-ordered perfluoroalkyl side groups at the brush end and their antibiofouling properties. J Mater Chem B 2015; 3:4388-4400. [DOI: 10.1039/c5tb00210a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The protein-resistant performance was enhanced greatly by constructing a polymer brush surface with perfectly close-packed perfluoroalkyl groups.
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Affiliation(s)
- Lin Wang
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Xiang Chen
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Xinyu Cao
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Jianquan Xu
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Biao Zuo
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Li Zhang
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Xinping Wang
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Juping Yang
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
| | - Yanqing Yao
- Department of Chemistry
- Key Laboratory of Advanced Textile Materials and Manufacturing Technology of the Education Ministry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- China
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Zhou X, Chen Y, Han J, Wu X, Wang G, Jiang D. Betaine ester-shell functionalized hyperbranched polymers for potential antimicrobial usage: Guest loading capability, pH controlled release and adjustable compatibility. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Craig RA, McCoy CP, Gorman SP, Jones DS. Photosensitisers - the progression from photodynamic therapy to anti-infective surfaces. Expert Opin Drug Deliv 2014; 12:85-101. [PMID: 25247277 DOI: 10.1517/17425247.2015.962512] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The application of light as a stimulus in pharmaceutical systems and the associated ability to provide precise spatiotemporal control over location, wavelength and intensity, allowing ease of external control independent of environmental conditionals, has led to its increased use. Of particular note is the use of light with photosensitisers. AREAS COVERED Photosensitisers are widely used in photodynamic therapy to cause a cidal effect towards cells on irradiation due to the generation of reactive oxygen species. These cidal effects have also been used to treat infectious diseases. The effects and benefits of photosensitisers in the treatment of such conditions are still being developed and further realised, with the design of novel delivery strategies. This review provides an overview of the realisation of the pharmaceutically relevant uses of photosensitisers, both in the context of current research and in terms of current clinical application, and looks to the future direction of research. EXPERT OPINION Substantial advances have been and are being made in the use of photosensitisers. Of particular note are their antimicrobial applications, due to absence of resistance that is so frequently associated with conventional treatments. Their potency of action and the ability to immobilise to polymeric supports is opening a wide range of possibilities with great potential for use in healthcare infection prevention strategies.
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Affiliation(s)
- Rebecca A Craig
- Queen's University Belfast, School of Pharmacy , 97 Lisburn Road, Belfast, BT9 7BL , UK
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Moore E, Delalat B, Vasani R, McPhee G, Thissen H, Voelcker NH. Surface-initiated hyperbranched polyglycerol as an ultralow-fouling coating on glass, silicon, and porous silicon substrates. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15243-15252. [PMID: 25137525 DOI: 10.1021/am503570v] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Anionic ring-opening polymerization of glycidol was initiated from activated glass, silicon, and porous silicon substrates to yield thin, ultralow-fouling hyperbranched polyglycerol (HPG) graft polymer coatings. Substrates were activated by deprotonation of surface-bound silanol functionalities. HPG polymerization was initiated upon the addition of freshly distilled glycidol to yield films in the nanometer thickness range. X-ray photoelectron spectroscopy, contact angle measurements, and ellipsometry were used to characterize the resulting coatings. The antifouling properties of HPG-coated surfaces were evaluated in terms of protein adsorption and the attachment of mammalian cells. The adsorption of bovine serum albumin and collagen type I was found to be reduced by as much as 97 and 91%, respectively, in comparison to untreated surfaces. Human glioblastoma and mouse fibroblast attachment was reduced by 99 and 98%, respectively. HPG-grafted substrates outperformed polyethylene glycol (PEG) grafted substrates of comparable thickness under the same incubation conditions. Our results demonstrate the effectiveness of antifouling HPG graft polymer coatings on a selected range of substrate materials and open the door for their use in biomedical applications.
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Affiliation(s)
- Eli Moore
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Mawson Institute, University of South Australia , GPO Box 2471, Adelaide, South Australia 5001, Australia
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Materials and surface engineering to control bacterial adhesion and biofilm formation: A review of recent advances. Front Chem Sci Eng 2014. [DOI: 10.1007/s11705-014-1412-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Rouhani P, Salahinejad E, Kaul R, Vashaee D, Tayebi L. Nanostructured zirconium titanate fibers prepared by particulate sol–gel and cellulose templating techniques. JOURNAL OF ALLOYS AND COMPOUNDS 2013; 568:102-105. [DOI: 10.1016/j.jallcom.2013.03.142] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
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38
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Cappello M, Hardy K, MacDairmid A, Gallagher M, Banks J. Scanning tunneling microscopy tip-assisted modification of Ti(IV) dithiothreitol self-assembled monolayers on Au(111): restructuring of the gold surface. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Au(111) surfaces modified by exposure to a dilute solution of a Ti(IV)/dithiothreitol ligand to metal charge transfer complex (Ti(DTT)2) show a remarkable response to continuous scanning by scanning tunneling microscopy (STM). Vacancy islands on the gold surface, which are formed during the self-assembly of the molecular overlayer, coarsen and even merge during STM scanning at negative sample bias. In certain instances, the vacancy islands even line up to form parallel nanostructures. We believe the effect is due to mechanical interactions between tip and sample, which is enhanced by electrostatic effects. The Ti(DTT)2 complex is anchored to the gold surface via Au−S bonds, but due to the fact that there are multiple thiol groups, there may be “uncoordinated” thiols left “dangling”. The tip-induced modification involves the interaction of the tip with these “dangling” sulfurs, which in turn causes movement of single complex molecules with the attached sulfur-bonded gold. Under negative sample bias, the electric field weakens the binding between the sulfur-bonded gold atoms and the surrounding gold atoms in the surface allowing for the observed tip-induced dynamics. In contrast with the Ti(DTT)2 complex, a similar Ti(IV)/3-mercapto-1,2-propanediol complex (Ti(MPD)2) does not exhibit any tip-induced effects. In this case, there are no dangling sulfurs to interact with the STM tip. In addition, similarly prepared dithiothreitol, dithiothreitol titanium isopropoxide, and 3-mercapto-1,2-propanediol self-assembled monolayers (without dangling sulfurs) do not exhibit the tip-induced effect.
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Affiliation(s)
- M.L. Cappello
- Departments of Physics and Chemistry, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - K.A. Hardy
- Departments of Physics and Chemistry, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - A.R. MacDairmid
- Departments of Physics and Chemistry, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - M.C. Gallagher
- Departments of Physics and Chemistry, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - J.T. Banks
- Department of Chemistry, Acadia University, Wolfville, NS B4P 2R6, Canada
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Sawada T, Sawada T, Kumasaka T, Hamada N, Shibata T, Nonami T, Kimoto K. Self-cleaning effects of acrylic resin containing fluoridated apatite-coated titanium dioxide. Gerodontology 2013; 31:68-75. [DOI: 10.1111/ger.12052] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Tomofumi Sawada
- Division of Fixed Prosthodontics; Department of Oral and Maxillofacial Rehabilitation; Kanagawa Dental College; Yokosuka Japan
| | - Tomoji Sawada
- Division of Fixed Prosthodontics; Department of Oral and Maxillofacial Rehabilitation; Kanagawa Dental College; Yokosuka Japan
| | - Tomonari Kumasaka
- Division of Fixed Prosthodontics; Department of Oral and Maxillofacial Rehabilitation; Kanagawa Dental College; Yokosuka Japan
| | - Nobushiro Hamada
- Division of Microbiology; Department of Infection Control; Kanagawa Dental College; Yokosuka Japan
| | - Takeshi Shibata
- Division of Fixed Prosthodontics; Department of Oral and Maxillofacial Rehabilitation; Kanagawa Dental College; Yokosuka Japan
| | - Toru Nonami
- School of Life System Science and Technology; Chukyo University; Toyota Japan
| | - Katsuhiko Kimoto
- Division of Fixed Prosthodontics; Department of Oral and Maxillofacial Rehabilitation; Kanagawa Dental College; Yokosuka Japan
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40
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Shining light on materials--a self-sterilising revolution. Adv Drug Deliv Rev 2013; 65:570-80. [PMID: 22819684 DOI: 10.1016/j.addr.2012.07.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 06/15/2012] [Accepted: 07/06/2012] [Indexed: 12/20/2022]
Abstract
This review focuses on the development of light activated antimicrobial surfaces. These surfaces kill microbes by the action of light and have potential applications in domestic and healthcare settings. The inspiration for the new self-cleaning surfaces originates from photodynamic therapy where light is used to locate and destroy tumours. The first generation photosensitiser molecules, based on a porphyrin ring structure, could be considered as bioinspired and chemically related to chlorophyll. The review looks at developments of both soft polymeric surfaces with either surface bound or impregnated photosensitiser molecules; and hard inorganic surfaces such as modified titanium dioxide. The bacterial kill mechanisms are looked into with both surface types showing primary microbial kill through a radical induced pathway. The hard inorganic surfaces also show low bacterial adherence by means of a light activated photo-wetting of the surfaces meaning that they are "Easy Clean" and wash off microbes uniformly.
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Ishiguro H, Yao Y, Nakano R, Hara M, Sunada K, Hashimoto K, Kajioka J, Fujishima A, Kubota Y. Photocatalytic activity of Cu 2+/TiO 2-coated cordierite foam inactivates bacteriophages and Legionella pneumophila. APPLIED CATALYSIS. B, ENVIRONMENTAL 2013; 129:56-61. [PMID: 32288264 PMCID: PMC7126517 DOI: 10.1016/j.apcatb.2012.09.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 08/27/2012] [Accepted: 09/09/2012] [Indexed: 05/20/2023]
Abstract
We investigated the antiviral activity of TiO2-coated cordierite foam used in air cleaners, as well as the evaluation methodology. Furthermore, we developed Cu2+/TiO2-coated cordierite foam and investigated the reduction in viral infection ratio. The method for evaluation of antibacterial activity of TiO2-coated cordierite foam could also be applied to evaluation of antiviral activity. We showed that Cu2+/TiO2-coated cordierite foam reduced the viral infection ratio to a greater extent than TiO2-coated cordierite foam. Our findings suggest that the infection risk by polluted air could be decreased using Cu2+/TiO2-coated cordierite foam in air cleaners.
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Affiliation(s)
- Hitoshi Ishiguro
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Department of Urology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Yanyan Yao
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Department of Urology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Ryuichi Nakano
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Kitasato Research Center for Environment Science, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0329, Japan
| | - Masayuki Hara
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
| | - Kayano Sunada
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazuhito Hashimoto
- Department of Applied Chemistry, Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan
| | - Jitsuo Kajioka
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
| | - Akira Fujishima
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Yoshinobu Kubota
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Department of Urology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
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Merchán M, Ouk TS, Kubát P, Lang K, Coelho C, Verney V, Commereuc S, Leroux F, Sol V, Taviot-Guého C. Photostability and photobactericidal properties of porphyrin-layered double hydroxide–polyurethane composite films. J Mater Chem B 2013; 1:2139-2146. [DOI: 10.1039/c3tb20070a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Sodagar A, Bahador A, Khalil S, Shahroudi AS, Kassaee MZ. The effect of TiO2 and SiO2 nanoparticles on flexural strength of poly (methyl methacrylate) acrylic resins. J Prosthodont Res 2012. [PMID: 23200530 DOI: 10.1016/j.jpor.2012.05.001] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE TiO(2) and SiO(2) nanoparticles are products of nanotechnology which have been incorporated to acrylic resins (AR) in order to induce antimicrobial properties. However, as additives they can affect the mechanical properties of the final product. The aim of this study was to survey the effects of TiO(2) and SiO(2) nanoparticles on flexural strength (Fs) of poly (methyl methacrylate) acrylic resins. METHODS Acrylic specimens (Selecta Plus) in size of 5×10 (±0.2)×3.3 (±0.2)mm were prepared and divided into 7 groups: AR containing nanoTiO(2), SiO(2) and TiO(2) with SiO(2) in two concentration of 1% and 0.5%, in addition to a control group. To prepare nano AR, nanoparticles were added to the monomer. All specimens were stored in 37°C distilled water and underwent Fs test by universal testing machine (Zwick). RESULTS The maximum mean flexural strength (43.5 MPa) belongs to the control group and AR containing 0.5% of both TiO(2) and SiO(2) demonstrated the minimum mean Fs (30.1 MPa). Resins contained TiO(2), demonstrated lower values of Fs than those contained SiO(2) with the same concentration, but the differences were not significant (P>0.05). CONCLUSION Incorporation of TiO(2) and SiO(2) nanoparticles into acrylic resins can adversely affect the flexural strength of the final products, and this effect is directly correlated with the concentration of nanoparticles.
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Affiliation(s)
- Ahmad Sodagar
- Department of Orthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Ohko Y, Nagao Y, Okano K, Sugiura N, Fukuda A, Yang Y, Negishi N, Takeuchi M, Hanada S. Prevention of Phormidium tenue Biofilm Formation by TiO(2) Photocatalysis. Microbes Environ 2012; 24:241-5. [PMID: 21566379 DOI: 10.1264/jsme2.me09106] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We showed that the photocatalytic effect of a coating of TiO(2) greatly reduces the formation of a biofilm by Phormidium tenue (P. tenue), a filamentous cyanobacterium, on glass plates. Sample plates were immersed in P. tenue culture solution (OD(730)=0.3) under concurrent illumination with white fluorescent (WF) and UV light (0.3 mW cm(-2), each) for 11 days. TiO(2)-coated glass plates showed greatly reduced adhesion of P. tenue over 11 days compared to bare plates. The number of P. tenue adhering to bare glass plates increased to over 10(6) cells cm(-2) in 6 days. The photocatalytic anti-biofilm effect was also observed under WF light, although it was small and lasted only a few days. The addition of 1 mM mannitol, a scavenger for the hydroxyl radical (·OH), suppressed the effect. The surface of TiO(2)-coated plates was maintained in a highly hydrophilic state for 11 days, regardless of the addition of mannitol. Therefore, we conclude that the photocatalytic oxidation of P. tenue is effective in preventing the formation of a biofilm.
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Affiliation(s)
- Yoshihisa Ohko
- Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST)
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Cho Y, Cho D, Park JH, Frey MW, Ober CK, Joo YL. Preparation and Characterization of Amphiphilic Triblock Terpolymer-Based Nanofibers as Antifouling Biomaterials. Biomacromolecules 2012; 13:1606-14. [DOI: 10.1021/bm300327w] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Youngjin Cho
- Department
of Materials Science and Engineering, ‡School of Chemical and Biomolecular Engineering, and §Department of Fiber
Science and Apparel Design, Cornell University, Ithaca, New York 14853, United States
| | - Daehwan Cho
- Department
of Materials Science and Engineering, ‡School of Chemical and Biomolecular Engineering, and §Department of Fiber
Science and Apparel Design, Cornell University, Ithaca, New York 14853, United States
| | - Jay Hoon Park
- Department
of Materials Science and Engineering, ‡School of Chemical and Biomolecular Engineering, and §Department of Fiber
Science and Apparel Design, Cornell University, Ithaca, New York 14853, United States
| | - Margaret W. Frey
- Department
of Materials Science and Engineering, ‡School of Chemical and Biomolecular Engineering, and §Department of Fiber
Science and Apparel Design, Cornell University, Ithaca, New York 14853, United States
| | - Christopher K. Ober
- Department
of Materials Science and Engineering, ‡School of Chemical and Biomolecular Engineering, and §Department of Fiber
Science and Apparel Design, Cornell University, Ithaca, New York 14853, United States
| | - Yong Lak Joo
- Department
of Materials Science and Engineering, ‡School of Chemical and Biomolecular Engineering, and §Department of Fiber
Science and Apparel Design, Cornell University, Ithaca, New York 14853, United States
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Nanomaterial-Based Antibacterial Paper. NANO-ANTIMICROBIALS 2012. [PMCID: PMC7124105 DOI: 10.1007/978-3-642-24428-5_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Antibacterial materials are widely used in everyday life and plays important roles in the public health system. There are a wide range of materials that have been known to prevent attachment and proliferation of microbes on material surfaces. These include antibiotics, metal ions and quaternary ammonium compounds. Given the availability of these various antibacterial materials, concerns about antibiotics-resistance, environmental pollution, relatively complex processing and high cost have been of much recent interest. Antimicrobial properties of nanomaterials have been explored to meet these challenges. Various nanomaterials including silver nanoparticles (AgNPs), titanium oxide nanoparticles and carbon nanotubes (CNTs) have been found to be highly effective bacterial-killing materials. The most well-known examples are silver and silver-based compounds, which were well known to be antiseptic to a spectrum of bacterium even in ancient times. AgNPs have proven to possess high antibacterial activity with minimal perturbation to human cells. Consequently, widespread applications of AgNPs have been found in medical and environmental areas [1]. More recently, carbon nanomaterials have emerged as a type of novel antibacterial nanomaterials, including CNTs and graphene. In this chapter, we aim to provide a review on the fabrication of nanomaterials-based paper-like films and their antibacterial applications.
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Montanaro L, Speziale P, Campoccia D, Ravaioli S, Cangini I, Pietrocola G, Giannini S, Arciola CR. Scenery ofStaphylococcusimplant infections in orthopedics. Future Microbiol 2011; 6:1329-49. [DOI: 10.2217/fmb.11.117] [Citation(s) in RCA: 264] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Tang CY, Chen DZ, Chan KYY, Chu KM, Ng PC, Yue TM. Fabrication of antibacterial silicone composite by an antibacterial agent deposition, solution casting and crosslinking technique. POLYM INT 2011. [DOI: 10.1002/pi.3102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kasuga E, Kawakami Y, Matsumoto T, Hidaka E, Oana K, Ogiwara N, Yamaki D, Sakurada T, Honda T. Bactericidal activities of woven cotton and nonwoven polypropylene fabrics coated with hydroxyapatite-binding silver/titanium dioxide ceramic nanocomposite "Earth-plus". Int J Nanomedicine 2011; 6:1937-43. [PMID: 21931489 PMCID: PMC3173056 DOI: 10.2147/ijn.s24280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Bacteria from the hospital environment, including linens and curtains, are often responsible for hospital-associated infections. The aim of the present study was to evaluate the bactericidal effects of fabrics coated with the hydroxyapatite-binding silver/titanium dioxide ceramic nanocomposite “Earth-plus”. Methods Bactericidal activities of woven and nonwoven fabrics coated with Earth-plus were investigated by the time-kill curve method using nine bacterial strains, including three Staphylococcus aureus, three Escherichia coli, and three Pseudomonas aeruginosa strains. Results The numbers of viable S. aureus and E. coli cells on both fabrics coated with Earth-plus decreased to below 2 log10 colony-forming units/mL in six hours and reached the detection limit in 18 hours. Viable cell counts of P. aeruginosa on both fabrics coated with Earth-plus could not be detected after 3–6 hours. Viable cells on woven fabrics showed a more rapid decline than those on nonwoven fabrics. Bacterial cell counts of the nine strains on fabrics without Earth-plus failed to decrease even after 18 hours. Conclusion Woven cotton and nonwoven polypropylene fabrics were shown to have excellent antibacterial potential. The woven fabric was more bactericidal than the nonwoven fabric.
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Affiliation(s)
- Eriko Kasuga
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
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Yao Y, Ochiai T, Ishiguro H, Nakano R, Kubota Y. Antibacterial performance of a novel photocatalytic-coated cordierite foam for use in air cleaners. APPLIED CATALYSIS. B, ENVIRONMENTAL 2011; 106:592-599. [PMID: 32288263 PMCID: PMC7127110 DOI: 10.1016/j.apcatb.2011.06.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Revised: 06/08/2011] [Accepted: 06/15/2011] [Indexed: 05/09/2023]
Abstract
A novel titanium dioxide-coated cordierite foam (TiO2/cordierite foam) was developed for use in air cleaners. By a simple impregnation procedure, TiO2 nanoparticles were immobilized firmly onto the surface of a cordierite foam substrate through high-temperature (500 °C) calcination. The strong bactericidal performance of the fabricated foam was evaluated by a newly developed test method for complex three-dimensional through-pore structures. This method could trace 5-6 log units of decrease in bacterial cell numbers in an air environment, thus meeting the criteria of both the JIS and ISO standard test methods. With 0.25 mW cm-2 of UV-A irradiation for 24 h, the bactericidal rate of the TiO2/cordierite foam exceeded 99.9% for five types of airborne or droplet-based infectious pathogens: Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), Legionella pneumophila (L. pneumophila), Klebsiella pneumoniae (K. pneumoniae), and methicillin-resistant Staphylococcus aureus (MRSA). The results of repeat testing, where the same sample was used three times, revealed that the bactericidal rate for E. coli was maintained at 99.9% in the second and third use, indicating that the TiO2/cordierite foam possesses a long-term bactericidal action. The TiO2/cordierite foam also exhibited a high photocatalytic degradation capability on gaseous acetaldehyde, which is associated with sick building syndrome, and volatile organic compounds to generate CO2 and H2O. The results demonstrated that TiO2-coated cordierite foam has great potential for use in air-cleaning filters with not only high bactericidal performance to remove pathogens in the air and in droplets, but also strong decontaminating and deodorizing functionality.
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Affiliation(s)
- Yanyan Yao
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Department of Urology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Tsuyoshi Ochiai
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Division of Photocatalyst for Energy and Environment, Research Institute for Science and Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hitoshi Ishiguro
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Department of Urology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
| | - Ryuichi Nakano
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Kitasato Research Center for Environment Science, 1-15-1, Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0329, Japan
| | - Yoshinobu Kubota
- Kanagawa Academy of Science and Technology, KSP Bldg. West 6F, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
- Department of Urology, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
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