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Kafili G, Niknejad H, Tamjid E, Simchi A. Amnion-derived hydrogels as a versatile platform for regenerative therapy: from lab to market. Front Bioeng Biotechnol 2024; 12:1358977. [PMID: 38468689 PMCID: PMC10925797 DOI: 10.3389/fbioe.2024.1358977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 02/09/2024] [Indexed: 03/13/2024] Open
Abstract
In recent years, the amnion (AM) has emerged as a versatile tool for stimulating tissue regeneration and has been of immense interest for clinical applications. AM is an abundant and cost-effective tissue source that does not face strict ethical issues for biomedical applications. The outstanding biological attributes of AM, including side-dependent angiogenesis, low immunogenicity, anti-inflammatory, anti-fibrotic, and antibacterial properties facilitate its usage for tissue engineering and regenerative medicine. However, the clinical usage of thin AM sheets is accompanied by some limitations, such as handling without folding or tearing and the necessity for sutures to keep the material over the wound, which requires additional considerations. Therefore, processing the decellularized AM (dAM) tissue into a temperature-sensitive hydrogel has expanded its processability and applicability as an injectable hydrogel for minimally invasive therapies and a source of bioink for the fabrication of biomimetic tissue constructs by recapitulating desired biochemical cues or pre-defined architectural design. This article reviews the multi-functionality of dAM hydrogels for various biomedical applications, including skin repair, heart treatment, cartilage regeneration, endometrium regeneration, vascular graft, dental pulp regeneration, and cell culture/carrier platform. Not only recent and cutting-edge research is reviewed but also available commercial products are introduced and their main features and shortcomings are elaborated. Besides the great potential of AM-derived hydrogels for regenerative therapy, intensive interdisciplinary studies are still required to modify their mechanical and biological properties in order to broaden their therapeutic benefits and biomedical applications. Employing additive manufacturing techniques (e.g., bioprinting), nanotechnology approaches (e.g., inclusion of various bioactive nanoparticles), and biochemical alterations (e.g., modification of dAM matrix with photo-sensitive molecules) are of particular interest. This review article aims to discuss the current function of dAM hydrogels for the repair of target tissues and identifies innovative methods for broadening their potential applications for nanomedicine and healthcare.
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Affiliation(s)
- Golara Kafili
- Center for Nanoscience and Nanotechnology, Institute for Convergence Science and Technology, Sharif University of Technology, Tehran, Iran
| | - Hassan Niknejad
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Abdolreza Simchi
- Center for Nanoscience and Nanotechnology, Institute for Convergence Science and Technology, Sharif University of Technology, Tehran, Iran
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
- Center for Bioscience and Technology, Institute for Convergence Science and Technology, Sharif University of Technology, Tehran, Iran
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Chenani H, Saeidi M, Rastkhiz MA, Bolghanabadi N, Aghaii AH, Orouji M, Hatamie A, Simchi A. Challenges and Advances of Hydrogel-Based Wearable Electrochemical Biosensors for Real-Time Monitoring of Biofluids: From Lab to Market. A Review. Anal Chem 2024. [PMID: 38377558 DOI: 10.1021/acs.analchem.3c03942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Affiliation(s)
- Hossein Chenani
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
| | - Mohsen Saeidi
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
| | - MahsaSadat Adel Rastkhiz
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
| | - Nafiseh Bolghanabadi
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
| | - Amir Hossein Aghaii
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
| | - Mina Orouji
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
| | - Amir Hatamie
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden; Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO Box 45195-1159, Zanjan 45137-66731, Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 89694 Tehran, Iran
- Center for Bioscience and Technology, Institute for Convergence Science and Technology, Sharif University of Technology, Tehran 14588-89694, Iran
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3
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Lotfi R, Zandi N, Pourjavadi A, Christiansen JDC, Gurevich L, Mehrali M, Dolatshahi-Pirouz A, Pennisi CP, Tamjid E, Simchi A. Engineering Photo-Cross-Linkable MXene-Based Hydrogels: Durable Conductive Biomaterials for Electroactive Tissues and Interfaces. ACS Biomater Sci Eng 2024; 10:800-813. [PMID: 38159039 DOI: 10.1021/acsbiomaterials.3c01394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Light-cured conductive hydrogels have attracted immense interest in the regeneration of electroactive tissues and bioelectronic interfaces. Despite the unique properties of MXene (MX), its light-blocking effect in the range of 300-600 nm hinders the efficient cross-linking of photocurable hydrogels. In this study, we investigated the photo-cross-linking process of MX-gelatin methacrylate (GelMa) composites with different types of photoinitiators and MX concentrations to prepare biocompatible, injectable, conductive, and photocurable composite hydrogels. The examined photoinitiators were Eosin Y, Irgacure 2959 (Type I), and lithium phenyl-2,4,6-trimethylbenzoyl phosphinate (Type II). The light-blocking effect of MX strongly affected the thickness, pore structure, swelling ratio, degradation, and mechanical properties of the light-cured hydrogels. Uniform distribution of MX in the hydrogel matrix was achieved at concentrations up to 0.04 wt % but the film thickness and curing times varied depending on the type of photoinitiator. It was feasible to prepare thin films (0.5 mm) by employing Type I photoinitiators under a relatively long light irradiation (4-5 min) while thick films with centimeter sizes could be rapidly cured by using Type II photoinitiator (<60 s). The mechanical properties, including elastic modulus, toughness, and stress to break for the Type II hydrogels were significantly superior (up to 300%) to those of Type I hydrogels depending on the MX concentration. The swelling ratio was also remarkably higher (648-1274%). A conductivity of about 1 mS/cm was attained at 0.1 mg/mL MX for the composite hydrogel cured by the Type I photoinitiator. In vitro cytocompatibility assays determined that the hydrogels promoted cell viability, metabolic activity, and robust proliferation of C2C12 myoblasts, which indicated their potential to support muscle cell growth during myogenesis. The developed photocurable GelMa-MX hydrogels have the potential to serve as bioactive and conductive scaffolds to modulate cellular functions and for tissue-device interfacing.
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Affiliation(s)
- Roya Lotfi
- Center for Nanoscience and Nanotechnology, Institute for Convergence Science & Technology, Sharif University of Technology, Tehran 14588-89694, Iran
| | - Nooshin Zandi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran 14588-89694, Iran
| | - Ali Pourjavadi
- Department of Chemistry, Sharif University of Technology, P.O. Box 11365-9516, Tehran 14588-89694, Iran
| | | | - Leonid Gurevich
- Materials and Production, Aalborg University, Aalborg 9220, Denmark
| | - Mehdi Mehrali
- Department of Civil and Mechanical Engineering, Technical University of Denmark, Kgs Lyngby 2800, Denmark
| | | | - Cristian Pablo Pennisi
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg 9260, Denmark
| | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran 14588-89694, Iran
| | - Abdolreza Simchi
- Center for Nanoscience and Nanotechnology, Institute for Convergence Science & Technology, Sharif University of Technology, Tehran 14588-89694, Iran
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran 14588-89694, Iran
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Cui H, Zhou C, Zhang Y, Zhou T, Xie C, Li L, Wang J, Li J, Simchi A, Bai J, Zhou B. Highly-efficient natural gas desulfurization and simultaneous H 2O 2 synthesis based on the electrochemical coupling reaction strategy. J Hazard Mater 2024; 463:132823. [PMID: 37924701 DOI: 10.1016/j.jhazmat.2023.132823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/07/2023] [Accepted: 10/19/2023] [Indexed: 11/06/2023]
Abstract
Hydrogen sulfide (H2S) generated by natural gas exploitation is a dangerous and harmful gas that needs to be purified. Electrochemical Natural Gas Desulfurization offers a promising way for H2S purification and resource utilization in ambient conditions. However, poor energy efficiency and low resource value limit the prospective application in the industry. Herein, we propose a gas-liquid flow electrocatalysis system that couples H2S oxidation and O2 reduction processes to effectively recover sulfur and H2O2 with low energy consumption. Gas diffusion and mass transfer are accelerated by gas-liquid flow cells, which also significantly decrease the resistance. Besides, I-/I3- redox pairs promote selective H2S oxidation while inhibiting water decomposition, resulting in a 56% reduction in oxidation potential. Moreover, the surface proton concentration is elevated by employing a modified carbon gas diffusion electrode (GDE), which assists to maintains a high H2O2 faradic efficiency. The system is able to operate at a high current density of 102 mA/cm2 at an Ecell voltage of 3.5 V, yielding S and H2O2 at rates of 60 mg cm-2 h-1 and 50 mg cm-2 h-1 respectively. A techno-economic model forecasts the effects of system efficiency and energy prices on operational costs and illustrates potential routes to a plant-gate levelized application in the petrochemical industry.
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Affiliation(s)
- Hanbo Cui
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Changhui Zhou
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Yan Zhang
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Tingsheng Zhou
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Chaoyue Xie
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Lei Li
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jiachen Wang
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jinhua Li
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran.
| | - Jing Bai
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China.
| | - Baoxue Zhou
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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Sheybanikashani S, Zandi N, Hosseini D, Lotfi R, Simchi A. A sustainable and self-healable silk fibroin nanocomposite with antibacterial and drug eluting properties for 3D printed wound dressings. J Mater Chem B 2024; 12:784-799. [PMID: 38179665 DOI: 10.1039/d3tb02363j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
The development of self-healable and 3D printable hydrogels with decent biocompatibility, mechanical durability, adhesiveness to tissues, and antibacterial activity is of great importance for wound healing applications. In this study, we present a sustainable and environmentally friendly composite hydrogel consisting of silk fibroin (SF), oxidized salep (OS), and kappa carrageenan nanoparticles (NPs) for efficient wound care. The injectable nanocomposite hydrogel is highly stretchable and exhibits strong tissue adhesiveness and self-healing response through Schiff-base cross-linking between OS and SF. The tunable shear-thinning viscoelastic properties of the hydrogel facilitate 3D bioprinting with excellent shape adaptability (97.7 ± 1.1% recovery), enabling the fabrication of complex-shaped constructs. In vitro release kinetics of tetracycline (TC) encapsulated in kappa carrageenan NPs indicate a distinctive Korsmeyer-Peppas profile, including an initial burst release followed by a triphasic pattern controlled by the embedded NPs within the hydrogel matrix. The composite hydrogel shows a remarkable broad-spectrum antibacterial activity with substantial zones of inhibition against S. aureus (34.00 ± 1.00 mm) and E. coli (27.60 ± 2.08 mm) after 24 h of incubation at 37 °C. The addition of TC further enhances the zones of inhibition by approximately 45% for S. aureus and 27% for E. coli. The control group without kappa NP incorporation shows no zone of inhibition, underscoring the critical role of the nanoparticles in imparting antibacterial activity to the hydrogel. Cytocompatibility assays show the high viability of fibroblast (L929) cells (>90%) in vitro. In vivo biocompatibility studies through subcutaneous implantation also do not show malignancy, infection, abscess, necrosis, epidermal or dermal modifications, or inflammation of the wounds after 14 days post-injection. H&E staining shows that the biodegradation of the developed hydrogel facilitates the growth of non-inflammatory cells, leading to the substitution of the injected hydrogel with autologous tissue. The detailed analyses affirm that the multifunctional injectable hydrogel with self-healing and antibacterial properties has high potential for wound healing and skin tissue engineering.
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Affiliation(s)
- Sana Sheybanikashani
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
| | - Nooshin Zandi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
| | - Danial Hosseini
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
| | - Roya Lotfi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
- Center for Bioscioence and Technology, Institute for Convergence Science and Technology, Sharif University of Technology, 14588-89694 Tehran, Iran.
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Sovizi S, Angizi S, Ahmad Alem SA, Goodarzi R, Taji Boyuk MRR, Ghanbari H, Szoszkiewicz R, Simchi A, Kruse P. Plasma Processing and Treatment of 2D Transition Metal Dichalcogenides: Tuning Properties and Defect Engineering. Chem Rev 2023; 123:13869-13951. [PMID: 38048483 PMCID: PMC10756211 DOI: 10.1021/acs.chemrev.3c00147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/31/2023] [Accepted: 11/09/2023] [Indexed: 12/06/2023]
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) offer fascinating opportunities for fundamental nanoscale science and various technological applications. They are a promising platform for next generation optoelectronics and energy harvesting devices due to their exceptional characteristics at the nanoscale, such as tunable bandgap and strong light-matter interactions. The performance of TMD-based devices is mainly governed by the structure, composition, size, defects, and the state of their interfaces. Many properties of TMDs are influenced by the method of synthesis so numerous studies have focused on processing high-quality TMDs with controlled physicochemical properties. Plasma-based methods are cost-effective, well controllable, and scalable techniques that have recently attracted researchers' interest in the synthesis and modification of 2D TMDs. TMDs' reactivity toward plasma offers numerous opportunities to modify the surface of TMDs, including functionalization, defect engineering, doping, oxidation, phase engineering, etching, healing, morphological changes, and altering the surface energy. Here we comprehensively review all roles of plasma in the realm of TMDs. The fundamental science behind plasma processing and modification of TMDs and their applications in different fields are presented and discussed. Future perspectives and challenges are highlighted to demonstrate the prominence of TMDs and the importance of surface engineering in next-generation optoelectronic applications.
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Affiliation(s)
- Saeed Sovizi
- Faculty of
Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Shayan Angizi
- Department
of Chemistry and Chemical Biology, McMaster
University, Hamilton, Ontario L8S 4M1, Canada
| | - Sayed Ali Ahmad Alem
- Chair in
Chemistry of Polymeric Materials, Montanuniversität
Leoben, Leoben 8700, Austria
| | - Reyhaneh Goodarzi
- School of
Metallurgy and Materials Engineering, Iran
University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, Iran
| | | | - Hajar Ghanbari
- School of
Metallurgy and Materials Engineering, Iran
University of Science and Technology (IUST), Narmak, 16846-13114, Tehran, Iran
| | - Robert Szoszkiewicz
- Faculty of
Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089, Warsaw, Poland
| | - Abdolreza Simchi
- Department
of Materials Science and Engineering and Institute for Nanoscience
and Nanotechnology, Sharif University of
Technology, 14588-89694 Tehran, Iran
- Center for
Nanoscience and Nanotechnology, Institute for Convergence Science
& Technology, Sharif University of Technology, 14588-89694 Tehran, Iran
| | - Peter Kruse
- Department
of Chemistry and Chemical Biology, McMaster
University, Hamilton, Ontario L8S 4M1, Canada
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Ghasemvand F, Kabiri M, Hassan-Zadeh V, Simchi A. Chitosan, polyethylene oxide/polycaprolactone electrospun core/shell nanofibrous mat containing rosuvastatin as a novel drug delivery system for enhancing human mesenchymal stem cell osteogenesis. Front Mol Biosci 2023; 10:1220357. [PMID: 37520322 PMCID: PMC10374260 DOI: 10.3389/fmolb.2023.1220357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 07/05/2023] [Indexed: 08/01/2023] Open
Abstract
Introduction: Due to the potential positive effects of rosuvastatin (RSV) on human mesenchymal stem cells (MSCs) osteogenesis and new bone regeneration, it is crucial to develop a suitable carrier that can effectively control the release profile of RSV. The primary objective of this study was to introduce a novel drug delivery system based on core/shell nanofibrous structures, enabling a sustained release of RSV. Methods: To achieve this, coaxial electrospinning was employed to fabricate chitosan (CS)+polyethylene oxide (PEO)/polycaprolactone (PCL) nanofibrous mats, wherein RSV was incorporated within the core of nanofibers. By optimizing the relevant parameters of the electrospinning process, the mats' surface was further modified using plasma treatment. The fibers' shape, structure, and thermal stability were characterized. The wettability, and degradation properties of the fabricated mats were also examined. In vitro studies were conducted to examine the release behavior of RSV. Additionally, the capability of MSCs to survive and differentiate into osteocytes when cultured on nanofibers containing RSV was evaluated. Results: Results demonstrated the successful fabrication of CS + PEO + RSV/PCL core/shell mats with a core diameter of approximately 370 nm and a shell thickness of around 70 nm under optimized conditions. Plasma treatment was found to enhance the wettability and drug-release behavior of the mats. The nanofibrous structure, serving as a carrier for RSV, exhibited increased proliferation of MSCs and enhanced osteogenic differentiation. Conclusion: Therefore, it can be concluded that CS + PEO + RSV/PCL core/shell nanofibrous structure can be utilized as a sustained-release platform for RSV over an extended period, making it a promising candidate for guided bone regeneration.
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Affiliation(s)
- Fariba Ghasemvand
- Department of Cell and Molecular Biology, Kish International Campus, University of Tehran, Kish, Iran
| | - Mahboubeh Kabiri
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Vahideh Hassan-Zadeh
- Department of Cell and Molecular Biology, Faculty of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
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Kafili G, Tamjid E, Niknejad H, Simchi A. Development of injectable hydrogels based on human amniotic membrane and polyethyleneglycol-modified nanosilicates for tissue engineering applications. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tohidi H, Maleki-Jirsaraei N, Simchi A, Mohandes F, Emami Z, Fassina L, Naro F, Conti B, Barbagallo F. An Electroconductive, Thermosensitive, and Injectable Chitosan/Pluronic/Gold-Decorated Cellulose Nanofiber Hydrogel as an Efficient Carrier for Regeneration of Cardiac Tissue. Materials (Basel) 2022; 15:ma15155122. [PMID: 35897556 PMCID: PMC9330822 DOI: 10.3390/ma15155122] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/14/2022] [Accepted: 07/20/2022] [Indexed: 12/10/2022]
Abstract
Myocardial infarction is a major cause of death worldwide and remains a social and healthcare burden. Injectable hydrogels with the ability to locally deliver drugs or cells to the damaged area can revolutionize the treatment of heart diseases. Herein, we formulate a thermo-responsive and injectable hydrogel based on conjugated chitosan/poloxamers for cardiac repair. To tailor the mechanical properties and electrical signal transmission, gold nanoparticles (AuNPs) with an average diameter of 50 nm were physically bonded to oxidized bacterial nanocellulose fibers (OBC) and added to the thermosensitive hydrogel at the ratio of 1% w/v. The prepared hydrogels have a porous structure with open pore channels in the range of 50−200 µm. Shear rate sweep measurements demonstrate a reversible phase transition from sol to gel with increasing temperature and a gelation time of 5 min. The hydrogels show a shear-thinning behavior with a shear modulus ranging from 1 to 12 kPa dependent on gold concentration. Electrical conductivity studies reveal that the conductance of the polymer matrix is 6 × 10−2 S/m at 75 mM Au. In vitro cytocompatibility assays by H9C2 cells show high biocompatibility (cell viability of >90% after 72 h incubation) with good cell adhesion. In conclusion, the developed nanocomposite hydrogel has great potential for use as an injectable biomaterial for cardiac tissue regeneration.
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Affiliation(s)
- Hajar Tohidi
- Department of Physics and Chemistry, Alzahra University, Vanak Village Street, Tehran 19938 93973, Iran;
| | - Nahid Maleki-Jirsaraei
- Department of Physics and Chemistry, Alzahra University, Vanak Village Street, Tehran 19938 93973, Iran;
- Correspondence: (N.M.-J.); (A.S.)
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran; (F.M.); (Z.E.)
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran
- Correspondence: (N.M.-J.); (A.S.)
| | - Fatemeh Mohandes
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran; (F.M.); (Z.E.)
| | - Zahra Emami
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran; (F.M.); (Z.E.)
| | - Lorenzo Fassina
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 27100 Pavia, Italy;
| | - Fabio Naro
- Department of Anatomical, Histological, Forensic and Orthopedic Sciences, Sapienza University, 00185 Rome, Italy;
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy;
| | - Federica Barbagallo
- Department of Experimental Medicine, Sapienza University, 00185 Rome, Italy; or
- Faculty of Medicine and Surgery, Kore University of Enna, 94100 Enna, Italy
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Zhang B, Bai J, Zhang Y, Zhou C, Wang P, Zha L, Li J, Simchi A, Zhou B. High Yield of CO and Synchronous S Recovery from the Conversion of CO 2 and H 2S in Natural Gas Based on a Novel Electrochemical Reactor. Environ Sci Technol 2021; 55:14854-14862. [PMID: 34634907 DOI: 10.1021/acs.est.1c04414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
H2S and CO2 are the main impurities in raw natural gas, which needs to be purified before use. However, the comprehensive utilization of H2S and CO2 has been ignored. Herein, we proposed a fully resource-based method to convert toxic gas H2S and greenhouse gas CO2 synchronously into CO and elemental S by using a novel electrochemical reactor. The special designs include that, in the anodic chamber, H2S was oxidized rapidly to S based on the I-/I3- cyclic redox system to avoid anode passivation. On the other hand, in the cathodic chamber, CO2 was rapidly and selectively reduced to CO based on a porous carbon gas diffusion electrode (GDE) modified with polytetrafluoroethylene and cobalt phthalocyanine (CoPc). A high Faraday efficiency (>95%) toward CO was achieved due to the enhanced mass transfer of CO2 on the GDE and the presence of the selective CoPc catalyst. The maximum energy efficiency of the system was more than 72.41% with a current density of over 50 mA/cm2, which was 12.5 times higher than what was previously reported on the H2S treatment system. The yields of S and CO were 24.94 mg·cm-2·h-1 and 19.93 mL·cm-2·h-1, respectively. A model analysis determined that the operation cost of the synchronous utilization of H2S and CO2 method was slightly lower than that of the single utilization of H2S in the existing natural gas purification technology. Overall, this paper provides efficient and simultaneous conversion of H2S and CO2 into S and CO.
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Affiliation(s)
- Bo Zhang
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jing Bai
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Yan Zhang
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Changhui Zhou
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Pengbo Wang
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Lina Zha
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Jinhua Li
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran 14588 89694, Iran
| | - Baoxue Zhou
- School of Environmental Science and Engineering, Key Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200240, PR China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
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11
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Nourmohammadi Khiarak B, Mohammadi R, Mojaddami M, Mohandes F, Simchi A. 3D self-supporting mixed transition metal oxysulfide nanowires on porous graphene networks for oxygen evolution reaction in alkaline solution. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115308] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Khiarak BN, Hasanzadeh M, Simchi A. Electrocatalytic hydrogen evolution reaction on graphene supported transition metal-organic frameworks. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108525] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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13
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Hosseini S, Daneshvar e Asl S, Vossoughi M, Simchi A, Sadrzadeh M. Green Electrospun Membranes Based on Chitosan/Amino-Functionalized Nanoclay Composite Fibers for Cationic Dye Removal: Synthesis and Kinetic Studies. ACS Omega 2021; 6:10816-10827. [PMID: 34056236 PMCID: PMC8153774 DOI: 10.1021/acsomega.1c00480] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/30/2021] [Indexed: 05/13/2023]
Abstract
Chitosan/poly(vinyl alcohol)/amino-functionalized montmorillonite nanocomposite electrospun membranes with enhanced adsorption capacity and thermomechanical properties were fabricated and utilized for the removal of a model cationic dye (Basic Blue 41). Effects of nanofiller concentrations (up to 3.0 wt %) on the morphology and size of the nanofibers as well as the porosity and thermomechanical properties of the nanocomposite membranes are studied. It is shown that the incorporation of the nanoclay particles with ∼10 nm lateral sizes into the polymer increases the size of the pores by about 80%. To demonstrate the efficiency of the adsorbents, the dye removal rate is investigated as a function of pH, adsorbent dosage, dye concentration, and nanofiller loading. The highest and fastest dye removal occurs for the nanofibrous membranes containing 2 wt % nanofiller, where about 80% of the cationic dye is removed after 15 min. This performance is at least 20% better than the pristine chitosan/poly(vinyl alcohol) membrane. The thermal stability and compression resistance of the nanocomposite membranes are found to be higher than those of the pristine membrane. In addition, reusability studies show that the dye removal performance of this nanocomposite membrane reduces by only about 5% over four cycles. The adsorption kinetics is explained by the Langmuir isotherm model and is expressed by a pseudo-second-order kinetic mechanism that determines a spontaneous chemisorption process. The results of this study provide a valuable perspective on the fabrication of high-performance, reusable, and efficient electrospun fibrous nanocomposite adsorbents.
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Affiliation(s)
- Seyed
Abolhassan Hosseini
- Department
of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering,
Advanced Water Research Lab (AWRL), University
of Alberta, Edmonton, AB, Canada T6G 1H9
- Department
of Chemical & Petroleum Engineering, Sharif University of Technology, Tehran, Iran 1458889694
| | - Shervin Daneshvar e Asl
- Department
of Materials Science & Engineering, Sharif University of Technology, Tehran, Iran 1458889694
| | - Manouchehr Vossoughi
- Department
of Chemical & Petroleum Engineering, Sharif University of Technology, Tehran, Iran 1458889694
| | - Abdolreza Simchi
- Department
of Materials Science & Engineering, Sharif University of Technology, Tehran, Iran 1458889694
| | - Mohtada Sadrzadeh
- Department
of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering,
Advanced Water Research Lab (AWRL), University
of Alberta, Edmonton, AB, Canada T6G 1H9
- . Tel: +1 780 492
8745
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14
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Abstract
PbS quantum dots capped with formamidinium ligands were deposited as graphene-based photodetectors. Solid phase exchange improves the infrared photo-detectivity.
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Affiliation(s)
- Samaneh Aynehband
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 Tehran, Iran
- Department of Chemistry, Department of Physics, Engineering Physics and Astronomy, Queens University, Kingston, Ontario K7L 3N6, Canada
| | - Maryam Mohammadi
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 Tehran, Iran
| | - Rana Poushimin
- Department of Chemistry, Department of Physics, Engineering Physics and Astronomy, Queens University, Kingston, Ontario K7L 3N6, Canada
| | - Jean-Michel Nunzi
- Department of Chemistry, Department of Physics, Engineering Physics and Astronomy, Queens University, Kingston, Ontario K7L 3N6, Canada
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, 14588 Tehran, Iran
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, 14588 Tehran, Iran
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15
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Zandi N, Sani ES, Mostafavi E, Ibrahim DM, Saleh B, Shokrgozar MA, Tamjid E, Weiss PS, Simchi A, Annabi N. Nanoengineered shear-thinning and bioprintable hydrogel as a versatile platform for biomedical applications. Biomaterials 2021; 267:120476. [PMID: 33137603 PMCID: PMC7846391 DOI: 10.1016/j.biomaterials.2020.120476] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 10/13/2020] [Accepted: 10/18/2020] [Indexed: 12/26/2022]
Abstract
The development of bioinks based on shear-thinning and self-healing hydrogels has recently attracted significant attention for constructing complex three-dimensional physiological microenvironments. For extrusion-based bioprinting, it is challenging to provide high structural reliability and resolution of printed structures while protecting cells from shear forces during printing. Herein, we present shear-thinning and printable hydrogels based on silicate nanomaterials, laponite (LA), and glycosaminoglycan nanoparticles (GAGNPs) for bioprinting applications. Nanocomposite hydrogels (GLgels) were rapidly formed within seconds due to the interactions between the negatively charged groups of GAGNPs and the edges of LA. The shear-thinning behavior of the hydrogel protected encapsulated cells from aggressive shear stresses during bioprinting. The bioinks could be printed straightforwardly into shape-persistent and free-standing structures with high aspect ratios. Rheological studies demonstrated fast recovery of GLgels over multiple strain cycles. In vitro studies confirmed the ability of GLgels to support cell growth, proliferation, and spreading. In vitro osteogenic differentiation of pre-osteoblasts murine bone marrow stromal cells encapsulated inside the GLgels was also demonstrated through evaluation of ALP activity and calcium deposition. The subcutaneous implantation of the GLgel in rats confirmed its in vivo biocompatibility and biodegradability. The engineered shear-thinning hydrogel with osteoinductive characteristics can be used as a new bioink for 3D printing of constructs for bone tissue engineering applications.
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Affiliation(s)
- Nooshin Zandi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran; Department of Chemical Engineering, Northeastern University, Boston, Massachuestts, 02115, United States
| | - Ehsan Shirzaei Sani
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States
| | - Ebrahim Mostafavi
- Department of Chemical Engineering, Northeastern University, Boston, Massachuestts, 02115, United States
| | - Dina M Ibrahim
- Department of Chemical Engineering, Northeastern University, Boston, Massachuestts, 02115, United States; Energy Materials Laboratory (EML), School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Bahram Saleh
- Department of Chemical Engineering, Northeastern University, Boston, Massachuestts, 02115, United States
| | | | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
| | - Paul S Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, United States; California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, 90095, United States; Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States; Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, United States
| | - Abdolreza Simchi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran; Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095, United States.
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States; Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
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16
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Aynehband S, Mohammadi M, Thorwarth K, Hany R, Nüesch FA, Rossell MD, Pauer R, Nunzi JM, Simchi A. Solution Processing and Self-Organization of PbS Quantum Dots Passivated with Formamidinium Lead Iodide (FAPbI 3). ACS Omega 2020; 5:15746-15754. [PMID: 32637850 PMCID: PMC7331203 DOI: 10.1021/acsomega.0c02319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 06/05/2020] [Indexed: 05/02/2023]
Abstract
Solution-processed lead sulfide quantum dots (PbS QDs) are very attractive as NIR-active semiconductors for the fabrication of cost-efficient optoelectronic devices. To control the thin film carrier transport, as well as stability, surface passivation is of crucial importance. Here, we present the successful surface passivation of PbS QDs by the formamidinium lead iodide (FAPbI3) ligand. An effective procedure for the fabrication of FAPbI3-passivated PbS QDs through a binary-phase ligand exchange protocol in hexane and n-methylformamide is demonstrated. It is shown that this solution-processed ligand exchange drastically changes the photoluminescence intensity, exciton recombination dynamics, and carrier lifetime of the nanocrystals. The solution casting of the ligand-exchanged nanocrystals into thin films results in the periodic ordering of QDs in a square superlattice with close contacts. Planar graphene/QD photodetectors fabricated with PbS QDs passivated with FAPbI3 show substantially increased thermal stability as compared to similar devices using PbS QDs passivated with commonly used methylammonium lead iodide.
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Affiliation(s)
- Samaneh Aynehband
- Department
of Materials Science and Engineering, Sharif
University of Technology, 14588 Tehran, Iran
- Laboratory
for Functional Polymers, Empa, Swiss Federal
Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Department
of Chemistry, Department of Physics, Engineering Physics and Astronomy, Queens University, Kingston, Ontario K7L
3N6, Canada
| | - Maryam Mohammadi
- Department
of Materials Science and Engineering, Sharif
University of Technology, 14588 Tehran, Iran
| | - Kerstin Thorwarth
- Surface
Science and Coating Technologies, Empa,
Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Roland Hany
- Laboratory
for Functional Polymers, Empa, Swiss Federal
Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Frank Alain Nüesch
- Laboratory
for Functional Polymers, Empa, Swiss Federal
Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Institute
of Materials Science and Engineering, EPFL,
Ecole Polytechnique Fédérale de Lausanne, Station 12, 1015 Lausanne, Switzerland
| | - Marta D. Rossell
- Electron
Microscopy Center, Empa, Swiss Federal Laboratories
for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Robin Pauer
- Electron
Microscopy Center, Empa, Swiss Federal Laboratories
for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland
| | - Jean-Michel Nunzi
- Department
of Chemistry, Department of Physics, Engineering Physics and Astronomy, Queens University, Kingston, Ontario K7L
3N6, Canada
| | - Abdolreza Simchi
- Department
of Materials Science and Engineering, Sharif
University of Technology, 14588 Tehran, Iran
- Institute
for Nanoscience and Nanotechnology, Sharif
University of Technology, 14588 Tehran, Iran
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17
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Hasanzadeh M, Simchi A, Shahriyari Far H. Nanoporous composites of activated carbon-metal organic frameworks for organic dye adsorption: Synthesis, adsorption mechanism and kinetics studies. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2019.09.031] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Khiarak BN, Hasanzadeh M, Mojaddami M, Shahriyar Far H, Simchi A. In situ synthesis of quasi-needle-like bimetallic organic frameworks on highly porous graphene scaffolds for efficient electrocatalytic water oxidation. Chem Commun (Camb) 2020; 56:3135-3138. [DOI: 10.1039/c9cc09908e] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We present enhanced electrocatalytic activity of three-dimensional graphene scaffolds by decoration with one-dimensional CoxNi1−x MOF nanostructures (0 ≤ x ≤ 1).
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Affiliation(s)
| | | | - Majdoddin Mojaddami
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
| | | | - Abdolreza Simchi
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
- Institute for Nanoscience and Nanotechnology
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19
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Gheysari H, Mohandes F, Mazaheri M, Dolatyar B, Askari M, Simchi A. Extraction of Hydroxyapatite Nanostructures from Marine Wastes for the Fabrication of Biopolymer-Based Porous Scaffolds. Mar Drugs 2019; 18:E26. [PMID: 31892123 PMCID: PMC7024202 DOI: 10.3390/md18010026] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/20/2019] [Accepted: 12/24/2019] [Indexed: 12/12/2022] Open
Abstract
Three-dimensional porous nanocomposites consisting of gelatin-carboxymethylcellulose (CMC) cross-linked by carboxylic acids biopolymers and monophasic hydroxyapatite (HA) nanostructures were fabricated by lyophilization, for soft-bone-tissue engineering. The bioactive ceramic nanostructures were prepared by a novel wet-chemical and low-temperature procedure from marine wastes containing calcium carbonates. The effect of surface-active molecules, including sodium dodecyl sulfate (SDS) and hexadecyltrimethylammonium bromide (CTAB), on the morphology of HA nanostructures is shown. It is demonstrated that highly bioactive and monophasic HA nanorods with an aspect ratio > 10 can be synthesized in the presence of SDS. In vitro studies on the bioactive biopolymer composite scaffolds with varying pore sizes, from 100 to 300 μm, determine the capacity of the developed procedure to convert marine wastes to profitable composites for tissue engineering.
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Affiliation(s)
- Hengameh Gheysari
- Department of Materials Science and Engineering, Sharif University of Technology, International Campus, P.O. Box 79417-76655, Kish Island, Iran;
| | - Fatemeh Mohandes
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9161, Azadi Avenue, Tehran 14588, Iran; (F.M.); (M.M.); (M.A.)
| | - Mozhdeh Mazaheri
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9161, Azadi Avenue, Tehran 14588, Iran; (F.M.); (M.M.); (M.A.)
| | - Banafsheh Dolatyar
- Department of Cell and Developmental Biology, School of Biological Sciences, College of Science, University of Tehran, P.O. Box 14155-6619, Tehran, Iran;
| | - Masoud Askari
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9161, Azadi Avenue, Tehran 14588, Iran; (F.M.); (M.M.); (M.A.)
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9161, Azadi Avenue, Tehran 14588, Iran; (F.M.); (M.M.); (M.A.)
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-9466, Azadi Avenue, Tehran 14588, Iran
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20
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Kumar S, Pandey CM, Hatamie A, Simchi A, Willander M, Malhotra BD. Nanomaterial-Modified Conducting Paper: Fabrication, Properties, and Emerging Biomedical Applications. Glob Chall 2019; 3:1900041. [PMID: 31832235 PMCID: PMC6888762 DOI: 10.1002/gch2.201900041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 08/09/2019] [Indexed: 05/02/2023]
Abstract
The emerging demand for wearable, lightweight portable devices has led to the development of new materials for flexible electronics using non-rigid substrates. In this context, nanomaterial-modified conducting paper (CP) represents a new concept that utilizes paper as a functional part in various devices. Paper has drawn significant interest among the research community because it is ubiquitous, cheap, and environmentally friendly. This review provides information on the basic characteristics of paper and its functionalization with nanomaterials, methodology for device fabrication, and their various applications. It also highlights some of the exciting applications of CP in point-of-care diagnostics for biomedical applications. Furthermore, recent challenges and opportunities in paper-based devices are summarized.
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Affiliation(s)
- Saurabh Kumar
- Centre for Nano Science and Engineering (CeNSE)Indian Institute of ScienceBengaluru560012India
- Department of BiotechnologyDelhi Technological UniversityMain Bawana RoadDelhi110042India
| | - Chandra Mouli Pandey
- Department of BiotechnologyDelhi Technological UniversityMain Bawana RoadDelhi110042India
- Department of Applied ChemistryDelhi Technological UniversityMain Bawana RoadDelhi110042India
| | - Amir Hatamie
- Department of Science & TechnologyCampus NorrkopingLinkoping UniversitySE 60174NorrkopingSweden
- Nanostructured & Advanced Materials LabDepartment of Materials Science and EngineeringSharif University of TechnologyTehran1458889694Iran
| | - Abdolreza Simchi
- Nanostructured & Advanced Materials LabDepartment of Materials Science and EngineeringSharif University of TechnologyTehran1458889694Iran
| | - Magnus Willander
- Department of Science & TechnologyCampus NorrkopingLinkoping UniversitySE 60174NorrkopingSweden
| | - Bansi D. Malhotra
- Department of BiotechnologyDelhi Technological UniversityMain Bawana RoadDelhi110042India
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21
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Zandi N, Lotfi R, Tamjid E, Shokrgozar MA, Simchi A. Core-sheath gelatin based electrospun nanofibers for dual delivery release of biomolecules and therapeutics. Mater Sci Eng C Mater Biol Appl 2019; 108:110432. [PMID: 31923974 DOI: 10.1016/j.msec.2019.110432] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 10/27/2019] [Accepted: 11/13/2019] [Indexed: 02/06/2023]
Abstract
Coaxial electrospinning with the ability to use simultaneously two separate solvents provides a promising strategy for drug delivery. Nevertheless, controlled release of hydrophilic and sensitive therapeutics from slow biodegradable polymers is still challenging. To address this gap, we fabricated core-sheath fibers for dual delivery of lysozyme, as a model protein, and phenytoin sodium as a small therapeutic molecule. The sheath was processed by a gelatin solution while the core fibers were fabricated from an aqueous gelatin/PVA solution. Microstructural studies by transmission and scanning electron microscopy reveal the formation of homogeneous core-sheath nanofibers with an outer and inner diameter of 180 ± 48 nm and 106 ± 30 nm, respectively. Thermal gravimetric analysis determines that the mass loss of the core-sheath fibers fall between the mass loss values of individual sheath and core fibers. Swelling studies indicate higher water absorption of the core-sheath mat compared to the separate sheath and core membranes. In vitro drug release studies in Phosphate Buffered Saline (PBS) determine sustained release of the therapeutics from the core-sheath structure. The release trails three stages including non-Fickian diffusion at the early stage followed by the Fickian diffusion mechanism. The present study shows a useful approach to design core-sheath nanofibrous membranes with controlled and programmable drug release profiles.
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Affiliation(s)
- Nooshin Zandi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran
| | - Roya Lotfi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran
| | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
| | | | - Abdolreza Simchi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran; Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran.
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22
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Eslahi N, Mahmoodi A, Mahmoudi N, Zandi N, Simchi A. Processing and Properties of Nanofibrous Bacterial Cellulose-Containing Polymer Composites: A Review of Recent Advances for Biomedical Applications. POLYM REV 2019. [DOI: 10.1080/15583724.2019.1663210] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Niloofar Eslahi
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Amin Mahmoodi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Nafiseh Mahmoudi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Nooshin Zandi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
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23
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Zandi N, Mostafavi E, Shokrgozar MA, Tamjid E, Webster TJ, Annabi N, Simchi A. Biomimetic proteoglycan nanoparticles for growth factor immobilization and delivery. Biomater Sci 2019; 8:1127-1136. [PMID: 31389409 DOI: 10.1039/c9bm00668k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The delivery of growth factors is often challenging due to their short half-life, low stability, and rapid deactivation. In native tissues, the sulfated residual of glycosaminoglycan (GAG) polymer chains of proteoglycans immobilizes growth factors through the proteoglycans'/proteins' complexation with nanoscale organization. These biological assemblies can influence growth factor-cell surface receptor interactions, cell differentiation, cell-cell signaling, and mechanical properties of the tissues. Here, we introduce a facile procedure to prepare novel biomimetic proteoglycan nanocarriers, based on naturally derived polymers, for the immobilization and controlled release of growth factors. We developed polyelectrolyte complex nanoparticles (PCNs) as growth factor nanocarriers, which mimic the dimensions, chemical composition, and growth factor immobilization of proteoglycans in native tissues. PCNs were prepared by a polymer-polymer pair reaction method and characterized for physicochemical properties. Fourier transform infrared spectroscopy (FTIR) analysis indicated that complexation occurred through electrostatic interactions. Transmission electron microscopy (TEM) results showed that the nanocarriers had a diameter of 60 ± 11 nm and 91 ± 33 nm for dermatan sulfate sodium salt-poly-l-lysine (DS-PLL) and gum tragacanth-poly-l-lysine (GT-PLL) complexes, respectively. The colloidal nanoparticles were stable due to their negative zeta potential, i.e.-25 ± 4 mV for DS-PLL and -18 ± 3.5 mV for GT-PLL. Cytocompatibility of PCNs in contact with human bone marrow stromal cells (HS-5) was confirmed through a live/dead assay and metabolic activity measurement. In addition, vascular endothelial growth factor (VEGF) was used to evaluate the ability of PCNs to stabilize growth factors. The capability of PCNs to preserve VEGF activity for up to 21 days was confirmed by analyzing the metabolic and mitogenic characteristics of human umbilical vein endothelial cells (HUVECs). Our results demonstrated the potential applications of these nanoparticles in therapeutic delivery for tissue regeneration applications.
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Affiliation(s)
- Nooshin Zandi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran. and Department of Chemical Engineering, Northeastern University, Boston, 02115, USA
| | - Ebrahim Mostafavi
- Department of Chemical Engineering, Northeastern University, Boston, 02115, USA
| | | | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, 02115, USA
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, California 90095, USA. and Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA and Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Abdolreza Simchi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran. and Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran
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24
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Azarniya A, Tamjid E, Eslahi N, Simchi A. Modification of bacterial cellulose/keratin nanofibrous mats by a tragacanth gum-conjugated hydrogel for wound healing. Int J Biol Macromol 2019; 134:280-289. [DOI: 10.1016/j.ijbiomac.2019.05.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 04/21/2019] [Accepted: 05/04/2019] [Indexed: 12/22/2022]
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25
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Zahedi E, Esmaeili A, Eslahi N, Shokrgozar MA, Simchi A. Fabrication and Characterization of Core-Shell Electrospun Fibrous Mats Containing Medicinal Herbs for Wound Healing and Skin Tissue Engineering. Mar Drugs 2019; 17:E27. [PMID: 30621270 PMCID: PMC6357190 DOI: 10.3390/md17010027] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 12/20/2018] [Accepted: 12/27/2018] [Indexed: 11/16/2022] Open
Abstract
Nanofibrous structures mimicking the native extracellular matrix have attracted considerable attention for biomedical applications. The present study aims to design and produce drug-eluting core-shell fibrous scaffolds for wound healing and skin tissue engineering. Aloe vera extracts were encapsulated inside polymer fibers containing chitosan, polycaprolactone, and keratin using the co-axial electrospinning technique. Electron microscopic studies show that continuous and uniform fibers with an average diameter of 209 ± 47 nm were successfully fabricated. The fibers have a core-shell structure with a shell thickness of about 90 nm, as confirmed by transmission electron microscopy. By employing Fourier-transform infrared spectroscopy, the characteristic peaks of Aloe vera were detected, which indicate successful incorporation of this natural herb into the polymeric fibers. Tensile testing and hydrophilicity measurements indicated an ultimate strength of 5.3 MPa (elongation of 0.63%) and water contact angle of 89°. In-vitro biological assay revealed increased cellular growth and adhesion with the presence of Aloe vera without any cytotoxic effects. The prepared core-shell fibrous mats containing medical herbs have a great potential for wound healing applications.
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Affiliation(s)
- Elahe Zahedi
- Department of Chemical Engineering, North Tehran Branch, Islamic Azad University, P.O. Box 19585/936, Tehran, Iran.
| | - Akbar Esmaeili
- Department of Chemical Engineering, North Tehran Branch, Islamic Azad University, P.O. Box 19585/936, Tehran, Iran.
| | - Niloofar Eslahi
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University, P.O. Box 14515/775, Tehran, Iran.
| | | | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365/8639, Tehran, Iran.
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, P.O. Box 11365/8639, Tehran, Iran.
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Hatamie A, Rezvani E, Rasouli AS, Simchi A. Electrocatalytic Oxidation of Ethanol on Flexible Three‐Dimensional Interconnected Nickel/Gold Composite Foams in Alkaline Media. ELECTROANAL 2018. [DOI: 10.1002/elan.201800490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Amir Hatamie
- Department of Materials Science and EngineeringSharif University of Technology Tehran Iran
| | - Ehsan Rezvani
- Department of Materials Science and EngineeringSharif University of Technology Tehran Iran
| | | | - Abdolreza Simchi
- Department of Materials Science and EngineeringSharif University of Technology Tehran Iran
- Institute for Nanoscience and NanotechnologySharif University of Technology Tehran Iran
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Naserzadeh P, Hafez AA, Abdorahim M, Abdollahifar MA, Shabani R, Peirovi H, Simchi A, Ashtari K. Curcumin loading potentiates the neuroprotective efficacy of Fe 3O 4 magnetic nanoparticles in cerebellum cells of schizophrenic rats. Biomed Pharmacother 2018; 108:1244-1252. [PMID: 30453447 DOI: 10.1016/j.biopha.2018.09.106] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/09/2018] [Accepted: 09/18/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The aim of this study was to investigate the neurotoxic effects of Fe3O4 magnetic- CurNPs on isolated schizophrenia mitochondria of rats as an in vivo model. METHODS We designed CMN loaded superparamagnetic iron oxide nanoparticles (SPIONs) (Fe3O4 magnetic- CurNPs) to achieve an enhanced therapeutic effect. The physicochemical properties of Fe3O4 magnetic- CurNPs were characterized using X-ray diffraction (XRD), and dynamic laser light scattering (DLS) and zeta potential. Further, to prove Fe3O4 magnetic- CurNPs results in superior therapeutic effects, and also, the mitochondrial membrane potential collapse, mitochondrial complex II activity, reactive oxygen species generation, ATP level, cytochrome c release and histopathology of cerebellums were determined in brains of schizophrenic rats. RESULTS We showed that effective treatment with CMN reduced or prevented Fe3O4 magnetic-induced oxidative stress and mitochondrial dysfunction in the rat brain probably, as well as mitochondrial complex II activity, MMP, and ATP level were remarkably reduced in the cerebellum mitochondria of treated group toward control (p < 0.05). Therewith, ROS generation, and cytochrome c release were notably (p < 0.05) increased in the cerebellum mitochondria of treated group compared with control group. CONCLUSION Taken together, Fe3O4 magnetic- CurNPs exhibits potent antineurotoxicity activity in cerebellums of schizophrenic rats. This approach can be extended to preclinical and clinical use and may have importance in schizophernia treatment in the future. To our knowledge this is the first report that provides the Fe3O4 magnetic- CurNPs could enhance the neuroprotective effects of CMN in the Schizophrenia.
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Affiliation(s)
- Parvaneh Naserzadeh
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Students Research Committee, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Asghar Ashrafi Hafez
- Cancer Research Center, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Marjan Abdorahim
- Faculté de science, Université Paris-Sud 11, Université Paris Saclay, 91405, Orsay Cedex, France
| | - Mohammad Amin Abdollahifar
- Department of Anatomical Sciences and Biology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ronak Shabani
- Department of Anatomical Sciences, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Habiballah Peirovi
- Nanomedicine and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abdolreza Simchi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box, 11365-11155, Tehran, Iran.
| | - Khadijeh Ashtari
- Radiation Biology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Medical Nanotechnology, Faculty of Advanced Technology in Medicine, Iran University of Medical Sciences, Tehran, Iran; Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.
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Angizi S, Hatamie A, Ghanbari H, Simchi A. Mechanochemical Green Synthesis of Exfoliated Edge-Functionalized Boron Nitride Quantum Dots: Application to Vitamin C Sensing through Hybridization with Gold Electrodes. ACS Appl Mater Interfaces 2018; 10:28819-28827. [PMID: 30074754 DOI: 10.1021/acsami.8b07332] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two-dimensional boron nitride quantum dots (2D BNQDs) with excellent chemical stability, high photoluminescence efficiency, and low toxicity are a new class of advanced materials for biosensing and bioimaging applications. To overcome the current challenge about the lack of facile, scalable, and reproducible synthesis approach of BNQDs, we introduce a green and facile approach based on mechanochemical exfoliation of bulk h-BN particles in ethanol. Few-layered hydroxylated-functionalized QDs with a thickness of 1-2 nm and a lateral dimension of 2-6 nm have been prepared. The synthesized nanocrystals exhibit a strong fluorescence emission at 407 and 425 nm with a quantum efficiency of ∼6.2%. Spectroscopic analyses determine that interactions between oxygen groups of the solvent with boron sites occur, which along with the mechanical forces, lead to efficient exfoliation of the hexagonal structure and surface functionalization with -OH groups. We also demonstrate that the orbital interaction between BNQDs and the gold surface results in a profound electrochemical catalytic activity toward oxidation of vitamin C. It is shown that the BNQD-modified screen-printed gold electrode exhibits a decreased onset oxidation potential for about 0.37 V/AgCl. In addition to high catalytic activity, electrochemical studies also reveal that this electrode allows selective and sensitive detection of vitamin C with a good response over a wide range from 0.80 μM to 5.0 mM with a detection limit of 0.45 μM (S/N = 3) and a sensitivity of 1.3 μA μM-1 cm-2. Finally, the potential application of the hybrid sensor for detecting vitamin C in commercial drinks is demonstrated.
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Affiliation(s)
| | | | - Hajar Ghanbari
- School of Metallurgy and Materials Engineering , Iran University of Science and Technology , P.O. Box 163-16765, 16844 Tehran , Iran
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Ghaffari R, Eslahi N, Tamjid E, Simchi A. Dual-Sensitive Hydrogel Nanoparticles Based on Conjugated Thermoresponsive Copolymers and Protein Filaments for Triggerable Drug Delivery. ACS Appl Mater Interfaces 2018; 10:19336-19346. [PMID: 29771485 DOI: 10.1021/acsami.8b01154] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this study, novel hydrogel nanoparticles with dual triggerable release properties based on fibrous structural proteins (keratin) and thermoresponsive copolymers (Pluronic) are introduced. Nanoparticles were used for curcumin delivery as effective and safe anticancer agents, the hydrophobicity of which has limited their clinical applications. A drug was loaded into hydrogel nanoparticles by a single-step nanoprecipitation method. The drug-loaded nanoparticles had an average diameter of 165 and 66 nm at 25 and 37 °C, respectively. It was shown that the drug loading efficiency could be enhanced through crosslinking of the disulfide bonds in keratin. Crosslinking provided a targeted release profile under reductive conditions using an in vivo agent, glutathione (GSH), or in the presence of trypsin. Cytocompatibility assay using HeLa and L929 fibroblast cells exhibited no adverse effect of nanoparticles on cell viability up to 1 mg/mL. Besides, the green fluorescence of curcumin confirmed the uptake of drug-loaded nanoparticles by cancer cells. The redox and temperature-sensitive nanoparticles are potentially useable for the efficient delivery of hydrophobic drugs to targeted regions having a triggerable release profile.
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Affiliation(s)
| | - Niloofar Eslahi
- Department of Textile Engineering, Science and Research Branch , Islamic Azad University , P.O. Box 14515/775, Tehran 1477893855 , Iran
| | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences , Tarbiat Modares University , Tehran 1411713116 , Iran
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Kiani F, Astani NA, Rahighi R, Tayyebi A, Tayebi M, Khezri J, Hashemi E, Rothlisberger U, Simchi A. Effect of graphene oxide nanosheets on visible light-assisted antibacterial activity of vertically-aligned copper oxide nanowire arrays. J Colloid Interface Sci 2018; 521:119-131. [PMID: 29558691 DOI: 10.1016/j.jcis.2018.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 03/03/2018] [Accepted: 03/06/2018] [Indexed: 12/11/2022]
Abstract
In the present work, the effect of graphene oxide (GO) nanosheets on the antibacterial activity of CuO nanowire arrays under visible light irradiation is shown. A combined thermal oxidation/electrophoretic deposition technique was employed to prepare three-dimensional networks of graphene oxide nanosheets hybridized with vertically aligned CuO nanowires. With the help of standard antibacterial assays and X-ray photoelectron spectroscopy, it is shown that the light-activated antibacterial response of the hybrid material against gram-negative Escherichia coli is significantly improved as the oxide functional groups of the GO nanosheets are reduced. In order to explore the physicochemical mechanism behind this behavior, ab-initio simulations based on density functional theory were performed and the effect of surface functional groups and hybridization were elucidated. Supported by the experiments, a three-step photo-antibacterial based mechanism is suggested: (i) injection of an electron from CuO into rGO, (ii) localization of the excess electron on rGO functional groups, and (iii) release of reactive oxygen species lethal to bacteria. Activation of new photoactive and physical mechanisms in the hybrid system makes rGO-modified CuO nanowire coatings as promising nanostructure devices for antimicrobial applications in particular for dry environments.
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Affiliation(s)
- Fatemeh Kiani
- Department of Materials Science and Engineering, Sharif University of Technology, PO Box: 11365-9466, Tehran, Iran
| | - Negar Ashari Astani
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran, Iran
| | - Reza Rahighi
- Department of Research and Development, Sharif Ultrahigh Nanotechnologists (SUN) Company, P.O. Box: 13488-96394, Tehran, Iran
| | - Ahmad Tayyebi
- Department of Energy Engineering, Sharif University of Technology, Azadi Ave, P.O. Box: 113658639, Tehran, Iran
| | - Meysam Tayebi
- Chemical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, P.O. Box 9177948944, Mashhad, Iran
| | - Jafar Khezri
- National Research Center for Transgenic Mouse, National Institute of Genetic Engineering and Biotechnology, P.O. Box: 14965-161, Tehran, Iran; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Ehsan Hashemi
- National Research Center for Transgenic Mouse, National Institute of Genetic Engineering and Biotechnology, P.O. Box: 14965-161, Tehran, Iran; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Ursula Rothlisberger
- Laboratory of Computational Chemistry and Biochemistry (LCBC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, PO Box: 11365-9466, Tehran, Iran.
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Mazaheri M, Simchi A, Aashuri H. Enzymatic biosensing by covalent conjugation of enzymes to 3D-networks of graphene nanosheets on arrays of vertically aligned gold nanorods: Application to voltammetric glucose sensing. Mikrochim Acta 2018; 185:178. [PMID: 29594471 DOI: 10.1007/s00604-018-2722-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 01/31/2018] [Indexed: 01/26/2023]
Abstract
The authors demonstrate efficient direct electron transfer from the enzyme glucose oxidase to vertically aligned gold nanorods with a diameter of ~160 nm and a length of ~2 μm that are covalently linkage to a 3-dimensional network of reduced graphene oxide nanosheets. The assembly can be prepared by a 2-step electrochemical procedure. This hybrid structure holds the enzyme in a favorable position while retaining its functionality that ultimately provides enhanced performance for enzymatic sensing of glucose without utilizing mediators. The nanorod assembly was applied to the voltammetric detection of glucose. Figures of merit include an electrochemical sensitivity of 12 μA·mM-1·cm-2 (obtained from cathodic peak current at a voltage of -0.45 V vs. Ag/AgCl), a 3 μM detection limit (at signal/noise = 3), and a wide linear range (0.01-7 mM). The hybrid nanostructure has a heterogeneous electron transfer rate constant (ks) of 2.9 s-1. The high electrochemical activity is attributed to the synergistic effect of a large active surface and an enhanced electron transfer efficiency due to covalent amide linkage. Graphical Abstract Schematic of the procedure utilized for the fabrication of an electrochemical biosensor based on gold nanorods (AuNRs) modified with a reduced graphene oxide (rGO)/glucose oxidase (GOx) conjugate. The enzyme electrode was employed to the determination of glucose by differential pulse voltammetry.
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Affiliation(s)
- Mozhdeh Mazaheri
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran. .,Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran.
| | - Hossein Aashuri
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran
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Aghajani Derazkola H, Simchi A. Effects of alumina nanoparticles on the microstructure, strength and wear resistance of poly(methyl methacrylate)-based nanocomposites prepared by friction stir processing. J Mech Behav Biomed Mater 2018; 79:246-253. [PMID: 29335191 DOI: 10.1016/j.jmbbm.2018.01.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/04/2018] [Accepted: 01/09/2018] [Indexed: 11/18/2022]
Abstract
In this study, alumina-reinforced poly(methyl methacrylate) nanocomposites (PMMA/Al2O3) containing up to 20vol% nanoparticles with an average diameter of 50nm were prepared by friction stir processing. The effects of nanoparticle volume fraction on the microstructural features and mechanical properties of PMMA were studied. It is shown that by using a frustum pin tool and employing an appropriate processing condition, i.e. a rotational speed of 1600rpm/min and transverse velocity of 120mm/min, defect free nanocomposites at microscale with fine distribution of the nanoparticles can successfully been prepared. Mechanical evaluations including tensile, flexural, hardness and impact tests indicate that the strength and toughness of the material gradually increases with the nanoparticle concentration and reach to a flexural strength of 129MPa, hardness of 101 Shore D, and impact energy 2kJ/m2 for the nanocomposite containing 20vol% alumina. These values are about 10% and 20% better than untreated and FSP-treated PMMA (without alumina addition). Fractographic studies indicate typical brittle features with crack deflection around the nanoparticles. More interestingly, the sliding wear rate in a pin-on-disk configuration and the friction coefficient are reduced up to 50% by addition of alumina nanoparticles. The worn surfaces exhibit typical sliding and ploughing features.
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Affiliation(s)
- Hamed Aghajani Derazkola
- Young Researchers and Elites Club, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-9466, Azadi Avenue, 14588 Tehran, Iran; Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-9466, Azadi Avenue, 14588 Tehran, Iran.
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Mahmoudi N, Eslahi N, Mehdipour A, Mohammadi M, Akbari M, Samadikuchaksaraei A, Simchi A. Temporary skin grafts based on hybrid graphene oxide-natural biopolymer nanofibers as effective wound healing substitutes: pre-clinical and pathological studies in animal models. J Mater Sci Mater Med 2017; 28:73. [PMID: 28361280 DOI: 10.1007/s10856-017-5874-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 02/28/2017] [Indexed: 06/07/2023]
Abstract
In recent years, temporary skin grafts (TSG) based on natural biopolymers modified with carbon nanostructures have received considerable attention for wound healing. Developments are required to improve physico-mechanical properties of these materials to match to natural skins. Additionally, in-deep pre-clinical examinations are necessary to ensure biological performance and toxicity effect in vivo. In the present work, we show superior acute-wound healing effect of graphene oxide nanosheets embedded in ultrafine biopolymer fibers (60 nm) on adult male rats. Nano-fibrous chitosan-based skin grafts crosslinked by Genepin with physico-mechanical properties close to natural skins were prepared by electrospinning of highly concentrated chitosan- polyvinylpyrrolidone solutions containing graphene oxide (GO) nanosheets. No surfactants and organic solvents were utilized to ensure high biocompatibility of the fibrous structure. In vitro evaluations by human skin fibroblast cells including live and dead assay and MTT results show that GO promote cell viability of porous nanofibrous membrane while providing enhanced bactericidal capacity. In vivo studies on rat's skin determine accelerated healing effect, i.e. a large open wound (1.5 × 1.5 cm2) is fully regenerated after 14-day of post operation while healing is observed for sterile gauze sponge (as the control). Pathological studies support thick dermis formation and complete epithelialization in the presence of 1.5 wt% GO nanosheets. Over 99% wound healing occurs after 21 days for the injury covered with TSG containing 1.5 wt% GO while this would takes weeks for the control. Therefore, the developed materials have a high potential to be used as TSG as pre-clinical testing has shown.
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Affiliation(s)
- N Mahmoudi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box11155-9161, Azadi Avenue, Tehran, 14588, Iran
| | - N Eslahi
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - A Mehdipour
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - M Mohammadi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box11155-9161, Azadi Avenue, Tehran, 14588, Iran
| | - M Akbari
- Department of Mechanical Engineering, University of Victoria, Victoria, BC, Canada
| | - A Samadikuchaksaraei
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - A Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box11155-9161, Azadi Avenue, Tehran, 14588, Iran.
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P. O. Box 11365-9466, Azadi Avenue, Tehran, 14588, Iran.
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Moeini S, Mohammadi MR, Simchi A. In-situ solvothermal processing of polycaprolactone/hydroxyapatite nanocomposites with enhanced mechanical and biological performance for bone tissue engineering. Bioact Mater 2017; 2:146-155. [PMID: 29744424 PMCID: PMC5935180 DOI: 10.1016/j.bioactmat.2017.04.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/13/2017] [Indexed: 11/26/2022] Open
Abstract
The interest in biodegradable polymer-matrix nanocomposites with bone regeneration potential has been increasing in recent years. In the present work, a solvothermal process is introduced to prepare hydroxyapatite (HA) nanorod-reinforced polycaprolactone in-situ. A non-aqueous polymer solution containing calcium and phosphorous precursors is prepared and processed in a closed autoclave at different temperatures in the range of 60–150 °C. Hydroxyapatite nanorods with varying aspect ratios are formed depending on the processing temperature. X-ray diffraction analysis and field-emission scanning electron microscopy indicate that the HA nanorods are semi-crystalline. Energy-dispersive X-ray spectroscopy and Fourier transform infrared spectrometry determine that the ratio of calcium to phosphorous increases as the processing temperature increases. To evaluate the effect of in-situ processing on the mechanical properties of the nanocomposites, highly porous scaffolds (>90%) containing HA nanorods are prepared by employing freeze drying and salt leaching techniques. It is shown that the elastic modulus and strength of the nanocomposites prepared by the in-situ method is superior (∼15%) to those of the ex-situ samples (blended HA nanorods with the polymer solution). The enhanced bone regeneration potential of the nanocomposites is shown via an in vitro bioactivity assay in a saturated simulated body fluid. An improved cell viability and proliferation is also shown by employing (3-(4,5- dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide) (MTT) assay in human osteosarcoma cell lines. The prepared scaffolds with in vitro regeneration capacity could be potentially useful for orthopaedic applications and maxillofacial surgery. A new solvothermal procedure was introduced to prepare PCL nanocomposites reinforced with HA nanorods. The aspect ratio of the HA nanorods increased from 2 to 7 by increasing the temperature. The in-situ nanocomposites exhibited better mechanical strength and bioactivity compared to the ex-situ ones. The effect of HA nanorods on the in vitro cell response of PCL scaffolds was shown.
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Affiliation(s)
- Saeed Moeini
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Mohammad Reza Mohammadi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran.,Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
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Mahmoudi N, Simchi A. On the biological performance of graphene oxide-modified chitosan/polyvinyl pyrrolidone nanocomposite membranes: In vitro and in vivo effects of graphene oxide. Materials Science and Engineering: C 2017; 70:121-131. [DOI: 10.1016/j.msec.2016.08.063] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/02/2016] [Accepted: 08/24/2016] [Indexed: 12/23/2022]
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Eslahi N, Abdorahim M, Simchi A. Smart Polymeric Hydrogels for Cartilage Tissue Engineering: A Review on the Chemistry and Biological Functions. Biomacromolecules 2016; 17:3441-3463. [PMID: 27775329 DOI: 10.1021/acs.biomac.6b01235] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Stimuli responsive hydrogels (SRHs) are attractive bioscaffolds for tissue engineering. The structural similarity of SRHs to the extracellular matrix (ECM) of many tissues offers great advantages for a minimally invasive tissue repair. Among various potential applications of SRHs, cartilage regeneration has attracted significant attention. The repair of cartilage damage is challenging in orthopedics owing to its low repair capacity. Recent advances include development of injectable hydrogels to minimize invasive surgery with nanostructured features and rapid stimuli-responsive characteristics. Nanostructured SRHs with more structural similarity to natural ECM up-regulate cell-material interactions for faster tissue repair and more controlled stimuli-response to environmental changes. This review highlights most recent advances in the development of nanostructured or smart hydrogels for cartilage tissue engineering. Different types of stimuli-responsive hydrogels are introduced and their fabrication processes through physicochemical procedures are reported. The applications and characteristics of natural and synthetic polymers used in SRHs are also reviewed with an outline on clinical considerations and challenges.
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Affiliation(s)
- Niloofar Eslahi
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University , P.O. Box 14515/775, Tehran, Iran
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Mahdavi M, Mahmoudi N, Rezaie Anaran F, Simchi A. Electrospinning of Nanodiamond-Modified Polysaccharide Nanofibers with Physico-Mechanical Properties Close to Natural Skins. Mar Drugs 2016; 14:E128. [PMID: 27399726 PMCID: PMC4962018 DOI: 10.3390/md14070128] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 12/16/2022] Open
Abstract
Electrospinning of biopolymers has gained significant interest for the fabrication of fibrous mats for potential applications in tissue engineering, particularly for wound dressing and skin regeneration. In this study, for the first time, we report successful electrospinning of chitosan-based biopolymers containing bacterial cellulous (33 wt %) and medical grade nanodiamonds (MND) (3 nm; up to 3 wt %). Morphological studies by scanning electron microscopy showed that long and uniform fibers with controllable diameters from 80 to 170 nm were prepared. Introducing diamond nanoparticles facilitated the electrospinning process with a decrease in the size of fibers. Fourier transform infrared spectroscopy determined hydrogen bonding between the polymeric matrix and functional groups of MND. It was also found that beyond 1 wt % MND, percolation networks of nanoparticles were formed which affected the properties of the nanofibrous mats. Uniaxial tensile testing of the woven mats determined significant enhancement of the strength (from 13 MPa to 25 MP) by dispersion of 1 wt % MND. The hydrophilicity of the mats was also remarkably improved, which was favorable for cell attachment. The water vapor permeability was tailorable in the range of 342 to 423 µg·Pa(-1)·s(-1)·m(-1). The nanodiamond-modified mats are potentially suitable for wound healing applications.
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Affiliation(s)
- Mina Mahdavi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, 14588 Tehran, Iran.
| | - Nafiseh Mahmoudi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, 14588 Tehran, Iran.
| | - Farzad Rezaie Anaran
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, 14588 Tehran, Iran.
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, 14588 Tehran, Iran.
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-9466, Azadi Avenue, 14588 Tehran, Iran.
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Nojoomi A, Tamjid E, Simchi A, Bonakdar S, Stroeve P. Injectable polyethylene glycol-laponite composite hydrogels as articular cartilage scaffolds with superior mechanical and rheological properties. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1182914] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Maleki H, Rai A, Pinto S, Evangelista M, Cardoso RMS, Paulo C, Carvalheiro T, Paiva A, Imani M, Simchi A, Durães L, Portugal A, Ferreira L. High Antimicrobial Activity and Low Human Cell Cytotoxicity of Core-Shell Magnetic Nanoparticles Functionalized with an Antimicrobial Peptide. ACS Appl Mater Interfaces 2016; 8:11366-11378. [PMID: 27074633 DOI: 10.1021/acsami.6b03355] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) functionalized with antimicrobial agents are promising infection-targeted therapeutic platforms when coupled with external magnetic stimuli. These antimicrobial nanoparticles (NPs) may offer advantages in fighting intracellular pathogens as well as biomaterial-associated infections. This requires the development of NPs with high antimicrobial activity without interfering with the biology of mammalian cells. Here, we report the preparation of biocompatible antimicrobial SPION@gold core-shell NPs based on covalent immobilization of the antimicrobial peptide (AMP) cecropin melittin (CM) (the conjugate is named AMP-NP). The minimal inhibitory concentration (MIC) of the AMP-NP for Escherichia coli was 0.4 μg/mL, 10-times lower than the MIC of soluble CM. The antimicrobial activity of CM depends on the length of the spacer between the CM and the NP. AMP-NPs are taken up by endothelial (between 60 and 170 pg of NPs per cell) and macrophage (between 18 and 36 pg of NPs per cell) cells and accumulate preferentially in endolysosomes. These NPs have no significant cytotoxic and pro-inflammatory activities for concentrations up to 200 μg/mL (at least 100 times higher than the MIC of soluble CM). Our results in membrane models suggest that the selectivity of AMP-NPs for bacteria and not eukaryotic membranes is due to their membrane compositions. The AMP-NPs developed here open new opportunities for infection-site targeting.
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Affiliation(s)
- Hajar Maleki
- CIEPQPF, Department of Chemical Engineering, University of Coimbra , 3030-790 Coimbra, Portugal
| | - Akhilesh Rai
- Biocant-Biotechnology Innovation Center, 3060-197 Cantanhede, Portugal
- CNC-Center of Neurosciences and Cell Biology, University of Coimbra , 3004-517 Coimbra, Portugal
| | - Sandra Pinto
- Biocant-Biotechnology Innovation Center, 3060-197 Cantanhede, Portugal
- CNC-Center of Neurosciences and Cell Biology, University of Coimbra , 3004-517 Coimbra, Portugal
| | - Marta Evangelista
- Biocant-Biotechnology Innovation Center, 3060-197 Cantanhede, Portugal
- CNC-Center of Neurosciences and Cell Biology, University of Coimbra , 3004-517 Coimbra, Portugal
| | - Renato M S Cardoso
- Biocant-Biotechnology Innovation Center, 3060-197 Cantanhede, Portugal
- CNC-Center of Neurosciences and Cell Biology, University of Coimbra , 3004-517 Coimbra, Portugal
| | - Cristiana Paulo
- Biocant-Biotechnology Innovation Center, 3060-197 Cantanhede, Portugal
- CNC-Center of Neurosciences and Cell Biology, University of Coimbra , 3004-517 Coimbra, Portugal
| | - Tiago Carvalheiro
- Blood and Transplantation Center of Coimbra, Portuguese Institute of Blood and Transplantation , 3041-861 Coimbra, Portugal
| | - Artur Paiva
- Blood and Transplantation Center of Coimbra, Portuguese Institute of Blood and Transplantation , 3041-861 Coimbra, Portugal
| | - Mohammad Imani
- Novel Drug Delivery Systems Department, Iran Polymer and Petrochemical Institute , 13115-14977 Tehran, Iran
| | - Abdolreza Simchi
- Department of Material Science and Engineering, Sharif University of Technology , 11365-11155 Tehran, Iran
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology , 11365-11155 Tehran, Iran
| | - Luísa Durães
- CIEPQPF, Department of Chemical Engineering, University of Coimbra , 3030-790 Coimbra, Portugal
| | - António Portugal
- CIEPQPF, Department of Chemical Engineering, University of Coimbra , 3030-790 Coimbra, Portugal
| | - Lino Ferreira
- Biocant-Biotechnology Innovation Center, 3060-197 Cantanhede, Portugal
- CNC-Center of Neurosciences and Cell Biology, University of Coimbra , 3004-517 Coimbra, Portugal
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40
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Eslahi N, Simchi A, Mehrjoo M, Shokrgozar MA, Bonakdar S. Hybrid cross-linked hydrogels based on fibrous protein/block copolymers and layered silicate nanoparticles: tunable thermosensitivity, biodegradability and mechanical durability. RSC Adv 2016. [DOI: 10.1039/c6ra08563f] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic representation of LAPONITE® reinforced pluronic/chitosan/keratin nanocomposite hydrogel crosslinked with Genipin.
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Affiliation(s)
- Niloofar Eslahi
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
- Institute for Nanoscience and Nanotechnology
| | - Morteza Mehrjoo
- National Cell Bank of Iran
- Pasteur Institute of Iran
- Tehran
- Iran
| | | | - Shahin Bonakdar
- National Cell Bank of Iran
- Pasteur Institute of Iran
- Tehran
- Iran
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41
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Tavakoli MM, Simchi A, Fan Z, Aashuri H. Chemical processing of three-dimensional graphene networks on transparent conducting electrodes for depleted-heterojunction quantum dot solar cells. Chem Commun (Camb) 2016; 52:323-6. [DOI: 10.1039/c5cc06955f] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The improvement of device performance by using a 3DGN structure as a fast extraction layer for electrons is shown.
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Affiliation(s)
- Mohammad Mahdi Tavakoli
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
- Department of Electronic and Computer Engineering
| | - Abdolreza Simchi
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
- Institute for Nanoscience and Nanotechnology
| | - Zhiyong Fan
- Department of Electronic and Computer Engineering
- Hong Kong University of Science and Technology
- Kowloon
- Hong Kong
| | - Hossein Aashuri
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
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42
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Tavakoli MM, Mirfasih MH, Hasanzadeh S, Aashuri H, Simchi A. Surface passivation of lead sulfide nanocrystals with low electron affinity metals: photoluminescence and photovoltaic performance. Phys Chem Chem Phys 2016; 18:12086-92. [DOI: 10.1039/c5cp07987j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Low electron affinity metals like Cd can annihilate deep trap states and increase the current density, resulting in higher performance.
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Affiliation(s)
- Mohammad Mahdi Tavakoli
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
| | | | - Soheil Hasanzadeh
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
| | - Hossein Aashuri
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
- Institute for Nanoscience and Nanotechnology
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43
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Mahmoudi N, Ostadhossein F, Simchi A. Physicochemical and antibacterial properties of chitosan-polyvinylpyrrolidone films containing self-organized graphene oxide nanolayers. J Appl Polym Sci 2015. [DOI: 10.1002/app.43194] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Nafiseh Mahmoudi
- Department of Materials Science and Engineering; Sharif University of Technology; Tehran 14588 Iran
| | - Fatemeh Ostadhossein
- Department of Materials Science and Engineering; Sharif University of Technology; Tehran 14588 Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering; Sharif University of Technology; Tehran 14588 Iran
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology; Tehran 14588 Iran
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Abstract
The technological and clinical need for orthopedic replacement materials has led to significant advances in the field of nanomedicine, which embraces the breadth of nanotechnology from pharmacological agents and surface modification through to regulation and toxicology. A variety of nanostructures with unique chemical, physical, and biological properties have been engineered to improve the functionality and reliability of implantable medical devices. However, mimicking living bone tissue is still a challenge. The scope of this review is to highlight the most recent accomplishments and trends in designing nanomaterials and their applications in orthopedics with an outline on future directions and challenges.
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Affiliation(s)
- Mozhdeh Mazaheri
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Niloofar Eslahi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Farideh Ordikhani
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran ; Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
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45
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Ostadhossein F, Mahmoudi N, Morales-Cid G, Tamjid E, Navas-Martos FJ, Soriano-Cuadrado B, Paniza JML, Simchi A. Development of Chitosan/Bacterial Cellulose Composite Films Containing Nanodiamonds as a Potential Flexible Platform for Wound Dressing. Materials (Basel) 2015; 8:6401-6418. [PMID: 28793571 PMCID: PMC5512916 DOI: 10.3390/ma8095309] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 08/29/2015] [Accepted: 09/03/2015] [Indexed: 12/23/2022]
Abstract
Chitosan/bacterial cellulose composite films containing diamond nanoparticles (NDs) with potential application as wound dressing are introduced. Microstructural studies show that NDs are uniformly dispersed in the matrix, although slight agglomeration at concentrations above 2 wt % is seen. Fourier transform infrared spectroscopy reveals formation of hydrogen bonds between NDs and the polymer matrix. X-ray diffraction analysis indicates reduced crystallinity of the polymer matrix in the presence of NDs. Approximately 3.5-fold increase in the elastic modulus of the composite film is obtained by the addition of 2 wt % NDs. The results of colorimetric analysis show that the composite films are transparent but turn to gray-like and semitransparent at high ND concentrations. Additionally, a decrease in highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) gap is also seen, which results in a red shift and higher absorption intensity towards the visible region. Mitochondrial activity assay using L929 fibroblast cells shows that the nanocomposite films are biocompatible (>90%) after 24 h incubation. Multiple lamellapodia and cell-cell interaction are shown. The results suggest that the developed films can potentially be used as a flexible platform for wound dressing.
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Affiliation(s)
- Fatemeh Ostadhossein
- Department of Materials Science and Engineering, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran.
| | - Nafiseh Mahmoudi
- Department of Materials Science and Engineering, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran.
| | - Gabriel Morales-Cid
- Fundacion Andaltec I+D+i, Poligono industrial Cañada de la Fuente, 23600 Martos, Jaen, Spain.
| | - Elnaz Tamjid
- Department of Nanobiotechnology, Faculty of Biological Sciences, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
| | | | - Belén Soriano-Cuadrado
- Fundacion Andaltec I+D+i, Poligono industrial Cañada de la Fuente, 23600 Martos, Jaen, Spain.
| | | | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran.
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, PO Box 11365-9466, Tehran, Iran.
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46
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Tavakoli MM, Aashuri H, Simchi A, Fan Z. Hybrid zinc oxide/graphene electrodes for depleted heterojunction colloidal quantum-dot solar cells. Phys Chem Chem Phys 2015; 17:24412-9. [DOI: 10.1039/c5cp03571f] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recently, hybrid nanocomposites consisting of graphene/nanomaterial heterostructures have emerged as promising candidates for the fabrication of optoelectronic devices.
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Affiliation(s)
- Mohammad Mahdi Tavakoli
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
- Department of Electronic and Computer Engineering
| | - Hossein Aashuri
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
| | - Abdolreza Simchi
- Department of Materials Science and Engineering
- Sharif University of Technology
- 14588 Tehran
- Iran
- Institute for Nanoscience and Nanotechnology
| | - Zhiyong Fan
- Department of Electronic and Computer Engineering
- Hong Kong University of Science and Technology
- Kowloon
- Hong Kong
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Shidpour R, Vosoughi M, Simchi A, Ghanbari F. Effect of Morphology-based Defect Structure of ZnO Nanostructures in Photo-Degradation of Organic Dye. ACTA ACUST UNITED AC 2014. [DOI: 10.1557/opl.2014.727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThe fabrication of strong photocatalysts applied to the degradation of organic pollutants is necessary in environmental applications. In a single-stage method, acetate precursor and poly vinyl pyrolydine are used to produce ZnO nanostructures with various morphologies in annealing temperatures ranging from 300 °C to 900 oC. The physical properties of the prepared nanostructures were characterized by SEM, XRD and PL spectroscopy. The SEM images exhibit a variety of the as-prepared hexagonal zinc oxides including wires, rods, particles and porous network of welded particles of ZnO nanoparticles. The results of the photocatalytic degradation of methylene blue as an organic dye in aqueous suspension showed that the morphology of ZnO nanostructures influences on the photocatalytic efficiency of ZnO nanostructures, greatly. For the best result, the highest MB degradation occurs by ZnO nanowires within 16 minutes and in others samples, degradation of higher than 95 percent occurs within 20 minutes. The XRD and PL spectroscopy revealed neither VZn nor Oi are in all of samples but only VO−, VO2− and Zni exist in ZnO nanostructures.
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Ordikhani F, Tamjid E, Simchi A. Characterization and antibacterial performance of electrodeposited chitosan-vancomycin composite coatings for prevention of implant-associated infections. Mater Sci Eng C Mater Biol Appl 2014; 41:240-8. [PMID: 24907757 DOI: 10.1016/j.msec.2014.04.036] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Revised: 03/10/2014] [Accepted: 04/17/2014] [Indexed: 01/29/2023]
Abstract
Orthopaedic implant-associated infections are one of the most serious complications in orthopaedic surgery and a major cause of implant failure. In the present work, drug-eluting coatings based on chitosan containing various amounts of vancomycin were prepared by a cathodic electrophoretic deposition process on titanium foils. A three-step release mechanism of the antibiotic from the films in a phosphate-buffered saline solution was noticed. At the early stage, physical encapsulation of the drug in the hydrogel network controlled the release rate. At the late stage, however, in vitro degradation/deattachment of chitosan was responsible for the controlled release. Cytotoxicity evaluation of the drug-eluting coatings via culturing in human osteosarcoma cells (MG-63 osteoblast-like cell line) showed no adverse effect on the biocompatibility. Antibacterial tests against Gram-positive Staphylococcus aureus also demonstrated that the infection risk of titanium foils was significantly reduced due to the antibiotic release. Additionally, in vitro electrochemical corrosion studies by polarization technique revealed that the corrosion current density was significantly lower for the titanium foils with drug-eluting coatings compared to that of uncoated titanium.
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Affiliation(s)
- F Ordikhani
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran
| | - E Tamjid
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran
| | - A Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran; Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran.
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49
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Esfandiari N, Simchi A, Bagheri R. Size tuning of Ag-decorated TiO₂ nanotube arrays for improved bactericidal capacity of orthopedic implants. J Biomed Mater Res A 2013; 102:2625-35. [PMID: 23982977 DOI: 10.1002/jbm.a.34934] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 08/20/2013] [Accepted: 08/21/2013] [Indexed: 11/05/2022]
Abstract
Surface modification of orthopedic implants using titanium dioxide nanotubes and silver nanoparticles (SNs) is a promising approach to prevent bacteria adhesion, biofilm formation, and implant infection. Herein, we utilized a straightforward and all-solution process to prepare silver-decorated TiO2 nanotube arrays with surface density of 10(3) to 10(4) per µm(2). With controlling the synthesis conditions, hexagonal closed-packed nanotubes with opening diameter of 30-100 nm that are decorated with SNs with varying sizes (12-40 nm) were prepared. Various analytical techniques were utilized to characterize the size, morphology, distribution, valance state, surface roughness, and composition of the prepared antibacterial films. The bactericidal capacity of the films were studied on Escherichia coli (E. coli) by drop-test method and correlated with the size and percentage of Ag as well as the surface density of TiO2 nanotube arrays. Synergetic effect of TiO2 nanotubes and SNs on the antibacterial activity of the composite films is shown. The bactericidal capacity is found to depend on the size characteristics of the Ag-TiO2 coating. The highest antibacterial activity is obtained for TiO2 nanotubes with opening diameter of about 100 nm and SNs with an average size of 20 nm. MTT assay using osteoblast MG63 cells was performed to examine the cell viability. We suggest that release rate of the silver ions is an important factor controlling the antibacterial activity. Additionally, the size dependency of the bactericidal capacity implies that electrical coupling between silver and TiO2 nanotubes and improved hydrophobicity of the coating might influence the bacterial behavior of the hybrid nanostructures.
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Affiliation(s)
- N Esfandiari
- Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-9466, Tehran, Iran
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50
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Behzadi S, Imani M, Yousefi M, Galinetto P, Simchi A, Amiri H, Stroeve P, Mahmoudi M. Pyrolytic carbon coating for cytocompatibility of titanium oxide nanoparticles: a promising candidate for medical applications. Nanotechnology 2012; 23:045102. [PMID: 22214787 DOI: 10.1088/0957-4484/23/4/045102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nanoparticles for biomedical use must be cytocompatible with the biological environment that they are exposed to. Current research has focused on the surface functionalization of nanoparticles by using proteins, polymers, thiols and other organic compounds. Here we show that inorganic nanoparticles such as titanium oxide can be coated by pyrolytic carbon (PyC) and that the coating has cytocompatible properties. Pyrolization and condensation of methane formed a thin layer of pyrolytic carbon on the titanium oxide core. The formation of the PyC shell retards coalescence and sintering of the ceramic phase. Our MTT assay shows that the PyC-coated particles are cytocompatible at employed doses.
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Affiliation(s)
- Shahed Behzadi
- Department of Materials Science and Engineering, Sharif University of Technology, Iran
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