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Akkurt Yıldırım M, Özer B, Türkoğlu N, Denktaş C. Evaluation of the Mechanical Strength and Cell Adhesion Capacity of POSS Doped PVA/CMC Hernia Patch. Macromol Biosci 2024:e2400095. [PMID: 39052386 DOI: 10.1002/mabi.202400095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 07/05/2024] [Indexed: 07/27/2024]
Abstract
Peritoneal adhesion typically occurs in applications such as abdominal, pelvic, and vascular surgery. It is necessary to develop a mechanical barrier to prevent adhesion. In this study, a novel biomaterial as a mechanical barrier is developed by combining polyvinyl alcohol (PVA) and carboxymethyl cellulose (CMC), doped with polyhedral oligomeric silsesquioxane (POSS) to prevent peritoneal adhesion. Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) methods reveal that POSS nanoparticles in the PVA matrix disrupted the intramolecular hydroxyl groups and structure of the crystal region. Electron microscopy (EM) images reveal that high concentrations of POSS (2 wt.%) cause irregular clustering in the composite matrix. As the concentration of POSS increases in the matrix, the degradation of the membranes increases, and protein adhesion decreases. In vitro cytotoxicity tests show a toxic effect on cells for PVA/CMC composite membranes, while on the other hand, the addition of POSS increases cell viability. According to the MMT test the POSS decreases cell adhesion of membranes. When comparing the POSS doped membrane to the undoped PVA/CMC membrane, an increase in the total antioxidant level and a decrease in the total oxidant level is observed.
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Affiliation(s)
- Meryem Akkurt Yıldırım
- Department of Molecular Biology and Genetics, Yildiz Technical University, Istanbul, 34349, Turkey
| | - Barkın Özer
- Department of Physics, Yildiz Technical University, Istanbul, 34220, Turkey
| | - Nelisa Türkoğlu
- Department of Molecular Biology and Genetics, Yildiz Technical University, Istanbul, 34349, Turkey
| | - Cenk Denktaş
- Department of Physics, Yildiz Technical University, Istanbul, 34220, Turkey
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2
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Nazemi MM, Khodabandeh A, Hadjizadeh A. Near-Field Electrospinning: Crucial Parameters, Challenges, and Applications. ACS APPLIED BIO MATERIALS 2022; 5:394-412. [PMID: 34995437 DOI: 10.1021/acsabm.1c00944] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Near-field electrospinning (NFES) is a micro- or nanofiber production technology based on jetting molten polymer or polymer solution. Thanks to the programmable collector and nozzle movement, it can generate designed patterns in the presence of an electric field. Despite a few shortcomings of NFES, its high resolution, simplicity, precision, high throughput, reproducibility, and low costs have convinced researchers to employ it for various purposes. Furthermore, as the paradigm of fiber-based structures shifts from random textures toward delicate designs, NFES can bridge the gap between existing inefficient processes and aspired technologies for precise patterning. NFES facilitates the production of ultrafine nanofibers because it can be used to fabricate them in every laboratory. These robust fibers are convenient tools for small and additive manufacturing. As such, NFES is considered a potent additive fabrication technology that facilitates the production of complicated patterns as well. It is suggested that near-field electrospun fibers exhibit outstanding results in various applications, owing to their precise and controllable positioning. Meanwhile, the ongoing development of NFES has yet to reach its climax, making it attractive for further research. In this review, the basic principles of NFES, derivatives, limitations, and applications in nanomanufacturing, tissue engineering, microscale electronics, biosensors, and optics are presented.
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Affiliation(s)
- Mohammad Mehdi Nazemi
- Department of Biomaterials & Tissue Engineering, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran 159163-4311, Iran
| | - Alireza Khodabandeh
- Department of Biomaterials & Tissue Engineering, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran 159163-4311, Iran
| | - Afra Hadjizadeh
- Department of Biomaterials & Tissue Engineering, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran 159163-4311, Iran
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Wu Y. Electrohydrodynamic jet 3D printing in biomedical applications. Acta Biomater 2021; 128:21-41. [PMID: 33905945 DOI: 10.1016/j.actbio.2021.04.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 03/31/2021] [Accepted: 04/16/2021] [Indexed: 12/21/2022]
Abstract
Electrohydrodynamic Jet 3D Printing (e-jetting) is a promising technique developed from electrospinning, which enables precise fiber deposition in a layer-by-layer fashion with customized designs. Several studies have verified that e-jetted scaffolds were able to support cell attachment, proliferation, and extracellular matrix formation, as well as cell infiltration into the scaffold due to the well-defined pores. Besides, e-jetting has also been combined with other techniques to incorporate biomaterials (e.g., hydrogels and cell spheroids) that could not be e-jetted, to promote the biological performance of the scaffold. In the recent decade, applying e-jetting in the fabrication of tissue-engineered scaffolds has drawn a lot of interest. Moreover, efforts have been put to develop varied scaffolds for some specific biomedical applications such as cartilage, tendon, and blood vessel, which exhibited superior mechanical properties and promoted cell behaviors including cellular alignment and differentiation. This review article also provides the reader with some crucial considerations and major limitations of e-jetting, such as scaffold design, printability of large-scale constructs, applicable biomaterials, and cell behaviors. Overall, this review article expounds on perspectives in the context of development and biomedical applications of this technique. STATEMENT OF SIGNIFICANCE: E-jetting technique is able to produce fibers with diameter in micrometer scale, which has been considered as a promising 3D printing technique. This technique has shown promise for regeneration of tissue engineered scaffolds with well-defined structures, which has been reported to apply in regeneration of different tissue types. The superior controllability of the process endows the feasibility of constructing multi-scale scaffolds with great biological mimicry and cellular infiltration. The incorporation of other biomaterials into the e-jetted networks further reinforces the scope of applications as compared to e-jetted scaffolds only. There is no doubt that e-jetting will be a great tool for tissue engineered scaffolding, and this review article will give overall perspectives in this topic.
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Joshi DJ, Chitre NM, Bansal A, Murnane KS, D’Souza MJ. Formulation and Characterization of Microcapsules Encapsulating PC12 Cells as a Prospective Treatment Approach for Parkinson's Disease. AAPS PharmSciTech 2021; 22:149. [PMID: 33961149 DOI: 10.1208/s12249-021-02007-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/29/2021] [Indexed: 01/02/2023] Open
Abstract
Parkinson's disease (PD) is the second most common neurological disorder, associated with decreased dopamine levels in the brain. The goal of this study was to assess the potential of a regenerative medicine-based cell therapy approach to increase dopamine levels. In this study, we used rat adrenal pheochromocytoma (PC12) cells that can produce, store, and secrete dopamine. These cells were microencapsulated in the selectively permeable polymer membrane to protect them from immune responses. For fabrication of the microcapsules, we used a modified Buchi spray dryer B-190 that allows for fast manufacturing of microcapsules and is industrially scalable. Size optimization of the microcapsules was performed by systematically varying key parameters of the spraying device. The short- and long-term stabilities of the microcapsules were assessed. In the in vitro study, the cells were found viable for a period of 30 days. Selective permeability of the microcapsules was confirmed via dopamine release assay and micro BCA protein assay. We found that the microcapsules were permeable to the small molecules including dopamine and were impermeable to the large molecules like BSA. Thus, they can provide the protection to the encapsulated cells from the immune cells. Griess's assay confirmed the non-immunogenicity of the microcapsules. These results demonstrate the effective fabrication of microcapsules encapsulating cells using an industrially scalable device. The microcapsules were stable, and the cells were viable inside the microcapsules and were found to release dopamine. Thus, these microcapsules have the potential to serve as the alternative or complementary treatment approach for PD.
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Mehta P, Zaman A, Smith A, Rasekh M, Haj‐Ahmad R, Arshad MS, der Merwe S, Chang M, Ahmad Z. Broad Scale and Structure Fabrication of Healthcare Materials for Drug and Emerging Therapies via Electrohydrodynamic Techniques. ADVANCED THERAPEUTICS 2018. [DOI: 10.1002/adtp.201800024] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Prina Mehta
- Leicester School of PharmacyDe Montfort University Leicester LE1 9BH UK
| | - Aliyah Zaman
- Leicester School of PharmacyDe Montfort University Leicester LE1 9BH UK
| | - Ashleigh Smith
- School of Pharmacy and Biomedical SciencesSt. Michael's BuildingUniversity of Portsmouth White Swan Road Portsmouth PO1 2DT UK
| | - Manoochehr Rasekh
- Leicester School of PharmacyDe Montfort University Leicester LE1 9BH UK
| | - Rita Haj‐Ahmad
- Leicester School of PharmacyDe Montfort University Leicester LE1 9BH UK
| | | | - Susanna der Merwe
- School of Pharmacy and Biomedical SciencesSt. Michael's BuildingUniversity of Portsmouth White Swan Road Portsmouth PO1 2DT UK
| | - M.‐W. Chang
- College of Biomedical Engineering and Instrument ScienceZhejiang University Hangzhou 310027 China
- Zhejiang Provincial Key Laboratory of Cardio‐Cerebral Vascular Detection Technology and Medicinal Effectiveness AppraisalZhejiang University Hangzhou 310027 China
| | - Z. Ahmad
- Leicester School of PharmacyDe Montfort University Leicester LE1 9BH UK
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Ye D, Ding Y, Duan Y, Su J, Yin Z, Huang YA. Large-Scale Direct-Writing of Aligned Nanofibers for Flexible Electronics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1703521. [PMID: 29473336 DOI: 10.1002/smll.201703521] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/08/2017] [Indexed: 05/27/2023]
Abstract
Nanofibers/nanowires usually exhibit exceptionally low flexural rigidities and remarkable tolerance against mechanical bending, showing superior advantages in flexible electronics applications. Electrospinning is regarded as a powerful process for this 1D nanostructure; however, it can only be able to produce chaotic fibers that are incompatible with the well-patterned microstructures in flexible electronics. Electro-hydrodynamic (EHD) direct-writing technology enables large-scale deposition of highly aligned nanofibers in an additive, noncontact, real-time adjustment, and individual control manner on rigid or flexible, planar or curved substrates, making it rather attractive in the fabrication of flexible electronics. In this Review, the ground-breaking research progress in the field of EHD direct-writing technology is summarized, including a brief chronology of EHD direct-writing techniques, basic principles and alignment strategies, and applications in flexible electronics. Finally, future prospects are suggested to advance flexible electronics based on orderly arranged EHD direct-written fibers. This technology overcomes the limitations of the resolution of fabrication and viscosity of ink of conventional inkjet printing, and represents major advances in manufacturing of flexible electronics.
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Affiliation(s)
- Dong Ye
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yajiang Ding
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yongqing Duan
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Jiangtao Su
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Zhouping Yin
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Yong An Huang
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
- Flexible Electronics Research Center, Huazhong University of Science and Technology, Wuhan, 430074, China
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7
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Lies BT, Cai Y, Spahr E, Lin K, Qin H. Machine vision assisted micro-filament detection for real-time monitoring of electrohydrodynamic inkjet printing. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.promfg.2018.07.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Pokorny M, Klemes J, Zidek O, Dollinger C, Ozcebe G, Singh S, Velebny V, Ghaemmaghami AM, Wolfova L, Vrana NE. Electrohydrodynamic printing as a method to micropattern large titanium implant surfaces with photocrosslinkable structures. Biomed Phys Eng Express 2017. [DOI: 10.1088/2057-1976/3/1/015002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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9
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Mehta P, Haj-Ahmad R, Rasekh M, Arshad MS, Smith A, van der Merwe SM, Li X, Chang MW, Ahmad Z. Pharmaceutical and biomaterial engineering via electrohydrodynamic atomization technologies. Drug Discov Today 2017; 22:157-165. [DOI: 10.1016/j.drudis.2016.09.021] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/17/2016] [Accepted: 09/22/2016] [Indexed: 10/20/2022]
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10
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Zhao D, Wang Y, Xu R, Wu G, Zhang L, Yu D, Cui F, Chen D, Tian W. Composition-graded Films of Fluoroapatite/PHB Fabricated via Electrospinning for Tissue Engineering. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911507079802] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Composition-graded films (CGF) of fluoroapatite (FAP) and poly(3-hydroxybutyrate- co-4-hydroxybutyrate) (PHB) were prepared via electrospinning solutions of FAP and PHB using a gradient composition of CGF. Thermal properties, mechanical properties and surface morphology of the films were investigated. Designed thermal and mechanical properties obtained by precise control of the composition gradient of the FAP/PHB CGF. The introduction of FAP in pure PHB film significantly changed the mechanical properties, such as tensile strength and extension rate of the pure PHB. Mouse fibroblast cells (L-929) were cultured on FAP/PHB uniform-films; the MTT test and cell morphology analysis indicate good biocompatibility of the modified CGF. This new method of processing makes CGF a potential candidate as an electrospinning scaffold material for tissue engineering.
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Affiliation(s)
- D.M. Zhao
- The Key laboratory of Beijing City on Preparation and Processing of Novel Polymer, BeijingUniversity of Chemical Technology, Beijing 100029, China
| | - Y.X. Wang
- The Key laboratory of Beijing City on Preparation and Processing of Novel Polymer, BeijingUniversity of Chemical Technology, Beijing 100029, China
| | - R.W. Xu
- The Key laboratory of Beijing City on Preparation and Processing of Novel Polymer, BeijingUniversity of Chemical Technology, Beijing 100029, China
| | - G. Wu
- The Key laboratory of Beijing City on Preparation and Processing of Novel Polymer, BeijingUniversity of Chemical Technology, Beijing 100029, China
| | - L.Q. Zhang
- The Key laboratory of Beijing City on Preparation and Processing of Novel Polymer, BeijingUniversity of Chemical Technology, Beijing 100029, China
| | - D.S. Yu
- The Key laboratory of Beijing City on Preparation and Processing of Novel Polymer, BeijingUniversity of Chemical Technology, Beijing 100029, China,
| | - F.Z. Cui
- Biomaterials Laboratory, Department of Materials Science & Engineering, Tsinghua University, Beijing 100084, China
| | - D.F. Chen
- Laboratory of Tissue Engineering of Beijing Research Institute of Traumatology and Orthopaedics, Beijing 100035, China,
| | - W. Tian
- Laboratory of Tissue Engineering of Beijing Research Institute of Traumatology and Orthopaedics, Beijing 100035, China
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11
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Wei Xu, Xiaohong Wang, Yongnian Yan, Wei Zheng, Zhuo Xiong, Feng Lin, Rendong Wu, Renji Zhang. Rapid Prototyping Three-Dimensional Cell/Gelatin/Fibrinogen Constructs for Medical Regeneration. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911507079451] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
There is a need for rapid fabrication of tissue or organs with well-defined structures and functions in regenerative medicine. Two patterns of cell/matrix constructs containing hepatic cells, gelatin and fibrinogen were successfully created by automated rapid prototyping techniques and stabilized with thrombin. No apparent cell damage was found during the process. Mechanical characterization demonstrated that a 1:1 ratio gelatin/fibrin mixture had the greatest elasticity modulus and compressive strength. Microscopic and histological observations showed that hepatic cells were embedded in the gelatin/fibrinogen matrix and were proliferating. Immunostaining and biochemical analysis indicated that the embedded hepatocytes secreted albumin. Fibrin appears to be a favorable component for a gelatin based cell assembly matrix in that it is bioresorbable, easily manipulated, and supports in vitro cell functions.
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Affiliation(s)
- Wei Xu
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China, wangxiaohong @tsinghua.edu.cn
| | - Xiaohong Wang
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Yongnian Yan
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Wei Zheng
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Zhuo Xiong
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Feng Lin
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Rendong Wu
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
| | - Renji Zhang
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University, Beijing 100084, P.R. China
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12
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Bas O, De-Juan-Pardo EM, Chhaya MP, Wunner FM, Jeon JE, Klein TJ, Hutmacher DW. Enhancing structural integrity of hydrogels by using highly organised melt electrospun fibre constructs. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.07.034] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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13
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Onses MS, Sutanto E, Ferreira PM, Alleyne AG, Rogers JA. Mechanisms, Capabilities, and Applications of High-Resolution Electrohydrodynamic Jet Printing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4237-4266. [PMID: 26122917 DOI: 10.1002/smll.201500593] [Citation(s) in RCA: 197] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 04/20/2015] [Indexed: 06/04/2023]
Abstract
This review gives an overview of techniques used for high-resolution jet printing that rely on electrohydrodynamically induced flows. Such methods enable the direct, additive patterning of materials with a resolution that can extend below 100 nm to provide unique opportunities not only in scientific studies but also in a range of applications that includes printed electronics, tissue engineering, and photonic and plasmonic devices. Following a brief historical perspective, this review presents descriptions of the underlying processes involved in the formation of liquid cones and jets to establish critical factors in the printing process. Different printing systems that share similar principles are then described, along with key advances that have been made in the last decade. Capabilities in terms of printable materials and levels of resolution are reviewed, with a strong emphasis on areas of potential application.
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Affiliation(s)
- M Serdar Onses
- Department of Materials Science and Engineering, Nanotechnology Research Center (ERNAM), Erciyes University, Kayseri, 38039, Turkey
| | - Erick Sutanto
- The Dow Chemical Company, Collegeville, PA, 19426, USA
| | - Placid M Ferreira
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Andrew G Alleyne
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - John A Rogers
- Departments of Materials Science and Engineering, Beckman Institute and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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Younesi M, Islam A, Kishore V, Panit S, Akkus O. Fabrication of compositionally and topographically complex robust tissue forms by 3D-electrochemical compaction of collagen. Biofabrication 2015; 7:035001. [PMID: 26069162 PMCID: PMC4489851 DOI: 10.1088/1758-5090/7/3/035001] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Collagen solutions are phase-transformed to mechanically robust shell structures with curviplanar topographies using electrochemically-induced pH gradients. The process enables rapid layer-by-layer deposition of collagen-rich mixtures over the entire field simultaneously to obtain compositionally diverse multilayered structures. The in-plane tensile strength and modulus of the electrocompacted collagen sheet samples were 5200-fold and 2300-fold greater than those of the uncompacted collagen samples. Out-of-plane compression tests showed a 27-fold increase in compressive stress and a 46-fold increase in compressive modulus compared to uncompacted collagen sheets. Cells proliferated 4.9 times faster, and the cellular area spread was 2.7 times greater on compacted collagen sheets. Electrocompaction also resulted in a 2.9 times greater focal adhesion area than on regular collagen hydrogel. The reported improvements in the cell-matrix interactions with electrocompaction would serve to expedite the population of electrocompacted collagen scaffolds by cells. The capacity of the method to fabricate nonlinear curved topographies with compositional heterogeneous layers is demonstrated by sequential deposition of a collagen-hydroxyapatite layer over a collagen layer. The complex curved topography of the nasal structure is replicated by the electrochemical compaction method. The presented electrochemical compaction process is an enabling modality which holds significant promise for reconstruction of a wide spectrum of topographically complex systems such as joint surfaces, craniofacial defects, ears, nose, and urogenital forms.
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Affiliation(s)
- Mousa Younesi
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106, United States
| | - Anowarul Islam
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106, United States
| | - Vipuil Kishore
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106, United States
- Department of Chemical Engineering, Florida Institute of Technology, Melbourne, FL 32901, United States
| | - Stefi Panit
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106, United States
| | - Ozan Akkus
- Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH 44106, United States
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States
- Department of Orthopedics, Case Western Reserve University, Cleveland, OH 44106, United States
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15
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Cheng Z, Zhang F, Liu W, Cui L, Kang L. A novel preparation for a PVA/l-histidine/AgNPs membrane and its antibacterial property. RSC Adv 2015. [DOI: 10.1039/c5ra08721j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The process of preparation for PVA/l-histidine/AgNPs membrane.
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Affiliation(s)
- Zhiqiang Cheng
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
- School of Aerospace Engineering
| | - Fanli Zhang
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Wei Liu
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Liying Cui
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Lijuan Kang
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
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16
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Gasperini L, Mano JF, Reis RL. Natural polymers for the microencapsulation of cells. J R Soc Interface 2014; 11:20140817. [PMID: 25232055 PMCID: PMC4191114 DOI: 10.1098/rsif.2014.0817] [Citation(s) in RCA: 355] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 08/27/2014] [Indexed: 02/06/2023] Open
Abstract
The encapsulation of living mammalian cells within a semi-permeable hydrogel matrix is an attractive procedure for many biomedical and biotechnological applications, such as xenotransplantation, maintenance of stem cell phenotype and bioprinting of three-dimensional scaffolds for tissue engineering and regenerative medicine. In this review, we focus on naturally derived polymers that can form hydrogels under mild conditions and that are thus capable of entrapping cells within controlled volumes. Our emphasis will be on polysaccharides and proteins, including agarose, alginate, carrageenan, chitosan, gellan gum, hyaluronic acid, collagen, elastin, gelatin, fibrin and silk fibroin. We also discuss the technologies commonly employed to encapsulate cells in these hydrogels, with particular attention on microencapsulation.
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Affiliation(s)
- Luca Gasperini
- 3B's, Department of Polymer Engineering, University of Minho, 4806-909 Caldas das Taipas, Portugal ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João F Mano
- 3B's, Department of Polymer Engineering, University of Minho, 4806-909 Caldas das Taipas, Portugal ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's, Department of Polymer Engineering, University of Minho, 4806-909 Caldas das Taipas, Portugal ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
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17
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Gasperini L, Maniglio D, Motta A, Migliaresi C. An electrohydrodynamic bioprinter for alginate hydrogels containing living cells. Tissue Eng Part C Methods 2014; 21:123-32. [PMID: 24903714 DOI: 10.1089/ten.tec.2014.0149] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
In this work we present a bioprinting technique that exploits the electrohydrodynamic process to obtain a jet of liquid alginate beads containing cells. A printer is used to microfabricate hydrogels block by block following a bottom-up approach. Alginate beads constitute the building blocks of the microfabricated structures. The beads are placed at predefined position on a target substrate made of calcium-enriched gelatin, where they crosslink upon contact without the need of further postprocessing. The printed sample can be easily removed from the substrate at physiological temperature. Three-dimensional printing is accomplished by the deposition of multiple layers of hydrogel. We have investigated the parameters influencing the process, the compatibility of the printing procedure with cells, and their survival after printing.
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Affiliation(s)
- Luca Gasperini
- 1 Department of Industrial Engineering, Biotech Research Center, University of Trento , Trento, Italy
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Huang Y, Bu N, Duan Y, Pan Y, Liu H, Yin Z, Xiong Y. Electrohydrodynamic direct-writing. NANOSCALE 2013; 5:12007-12017. [PMID: 24057297 DOI: 10.1039/c3nr04329k] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The electrohydrodynamic (EHD) direct-writing technique can be used to print solid/liquid straight/serpentine nanofibers onto a large-area substrate, in a direct, continuous, and controllable manner. It is a high-efficiency and cost-effective solution-processable technique to satisfy increasing demands of large-area micro/nano-manufacturing. It is ground-breaking to direct-write sub-100 nm fibers on a rigid/flexible substrate using organic materials. A comprehensive review is presented on the research and developments related to the EHD direct-writing technique and print heads. Many developments have been presented to improve the controllability of the electrospun fibers to form high-resolution patterns and devices. EHD direct-writing is characterized by its non-contact, additive and reproducible processing, high resolution, and compatibility with organic materials. It combines dip-pen, inkjet, and electrospinning by providing the feasibility of controllable electrospinning for sub-100 nm nanofabrication, and overcomes the drawbacks of conventional electron-beam lithography, which is relatively slow, complicated and expensive.
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Affiliation(s)
- YongAn Huang
- State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
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Gasperini L, Maniglio D, Migliaresi C. Microencapsulation of cells in alginate through an electrohydrodynamic process. J BIOACT COMPAT POL 2013. [DOI: 10.1177/0883911513501599] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The encapsulation of living cells within a semi-permeable matrix is an attractive process for transplanting nonautologous cells by limiting the interaction with the host immune system. The electrohydrodynamic process is a low-cost and high-throughput system to encapsulate cells by means of a static potential. We evaluated the use of this system for cell entrapment by assessing and then manufacturing capsules that had the best dimensions. The effect of different cell densities on the beads was determined to set up the basic parameters of the encapsulation system. The cell viability inside the beads and as a function of release time was observed for their biological response.
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Affiliation(s)
- L Gasperini
- Department of Industrial Engineering, Biotech Research Center, University of Trento, Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Trento, Italy
| | - D Maniglio
- Department of Industrial Engineering, Biotech Research Center, University of Trento, Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Trento, Italy
- INSTM–Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, Firenze, Italy
| | - C Migliaresi
- Department of Industrial Engineering, Biotech Research Center, University of Trento, Trento, Italy
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Trento, Italy
- INSTM–Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali, Firenze, Italy
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Mouriño V, Cattalini JP, Roether JA, Dubey P, Roy I, Boccaccini AR. Composite polymer-bioceramic scaffolds with drug delivery capability for bone tissue engineering. Expert Opin Drug Deliv 2013; 10:1353-65. [PMID: 23777443 DOI: 10.1517/17425247.2013.808183] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
INTRODUCTION Next-generation scaffolds for bone tissue engineering (BTE) should exhibit the appropriate combination of mechanical support and morphological guidance for cell proliferation and attachment while at the same time serving as matrices for sustained delivery of therapeutic drugs and/or biomolecular signals, such as growth factors. Drug delivery from BTE scaffolds to induce the formation of functional tissues, which may need to vary temporally and spatially, represents a versatile approach to manipulating the local environment for directing cell function and/or to treat common bone diseases or local infection. In addition, drug delivery from BTE is proposed to either increase the expression of tissue inductive factors or to block the expression of others factors that could inhibit bone tissue formation. Composite scaffolds which combine biopolymers and bioactive ceramics in mechanically competent 3D structures, including also organic-inorganic hybrids, are being widely developed for BTE, where the affinity and interaction between biomaterials and therapeutic drugs or biomolecular signals play a decisive role in controlling the release rate. AREAS COVERED This review covers current developments and applications of 3D composite scaffolds for BTE which exhibit the added capability of controlled delivery of therapeutic drugs or growth factors. A summary of drugs and biomolecules incorporated in composite scaffolds and approaches developed to combine biopolymers and bioceramics in composites for drug delivery systems for BTE is presented. Special attention is given to identify the main challenges and unmet needs of current designs and technologies for developing such multifunctional 3D composite scaffolds for BTE. EXPERT OPINION One of the major challenges for developing composite scaffolds for BTE is the incorporation of a drug delivery function of sufficient complexity to be able to induce the release patterns that may be necessary for effective osseointegration, vascularization and bone regeneration. Loading 3D scaffolds with different biomolecular agents should produce a codelivery system with different, predetermined release profiles. It is also envisaged that the number of relevant bioactive agents that can be loaded onto scaffolds will be increased, whilst the composite scaffold design should exploit synergistically the different degradation profiles of the organic and inorganic components.
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Affiliation(s)
- Viviana Mouriño
- University of Buenos Aires, Faculty of Pharmacy, Department of Pharmaceutical Technology , Buenos Aires 956 Junín St, 6th Floor, Buenos Aires CP1113 , Argentina
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Mustafa M, Kim HC, Doh YH, Choi KH. Structural, optical, and electrical characterization of the poly[9,9-dioctylfluorenyl-2,7-diyl]-co-1,4-benzo-(2,1,3)-thiadiazole thin film fabricated by electrostatic spray technique. POLYM ENG SCI 2013. [DOI: 10.1002/pen.23608] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Maria Mustafa
- Depatment of Mechatronics Engineering; Jeju National University; Jeju Korea
| | - Hyung Chan Kim
- School of Electronic Engineering; Jeju National University; Jeju Korea
| | - Yang-Hui Doh
- School of Electronic Engineering; Jeju National University; Jeju Korea
| | - Kyung Hyun Choi
- Depatment of Mechatronics Engineering; Jeju National University; Jeju Korea
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Ayandele E, Sarkar B, Alexandridis P. Polyhedral Oligomeric Silsesquioxane (POSS)-Containing Polymer Nanocomposites. NANOMATERIALS (BASEL, SWITZERLAND) 2012; 2:445-475. [PMID: 28348318 PMCID: PMC5304604 DOI: 10.3390/nano2040445] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 11/20/2012] [Accepted: 11/26/2012] [Indexed: 11/28/2022]
Abstract
Hybrid materials with superior structural and functional properties can be obtained by incorporating nanofillers into polymer matrices. Polyhedral oligomeric silsesquioxane (POSS) nanoparticles have attracted much attention recently due to their nanometer size, the ease of which these particles can be incorporated into polymeric materials and the unique capability to reinforce polymers. We review here the state of POSS-containing polymer nanocomposites. We discuss the influence of the incorporation of POSS into polymer matrices via chemical cross-linking or physical blending on the structure of nanocomposites, as affected by surface functional groups, and the POSS concentration.
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Affiliation(s)
- Ebunoluwa Ayandele
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260-4200, USA.
| | - Biswajit Sarkar
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260-4200, USA.
| | - Paschalis Alexandridis
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York (SUNY), Buffalo, NY 14260-4200, USA.
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MUNIR GILLIAN, HUANG JIE, EDIRISINGHE MOHAN, NANGREJO RAFIQUE, BONFIELD WILLIAM. ELECTROHYDRODYNAMIC PROCESSING OF CALCIUM PHOSPHATES: COATING AND PATTERNING FOR MEDICAL IMPLANTS. ACTA ACUST UNITED AC 2012. [DOI: 10.1142/s1793984411000426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Hydroxyapatite (HA)-coated metallic prostheses, which combine the osteoconductivity of HA and high strength of metallic alloys, have been increasingly the choice of joint replacement prostheses by surgeons as the general population lives longer. Surface modification of metallic implant surfaces is one of the key focal points to implantation technology. In addition to material chemistry, surface topography has been found to positively impact cellular response and is able to enhance the life time of the implant. Recently, a new technique, template-assisted electrohydrodynamic atomization (TAEA) spraying, developed using the principles of electrohydrodynamic atomization spraying, which is an electrically driven jet-based deposition method, is of considerable interest in surface topography formation. The process offers the attractive advantages of compatibility with micro-fabrication technology and versatility in pattern specification for advanced implant designs. This technology incorporates nanosized calcium phosphate to mimic the size and chemical composition of bone mineral in a micrometer-dimension pattern configuration to guide cellular responses. In vitro studies showed that both pillar and track nano Silicon-substituted HA (SiHA) patterns were able to encourage the attachment and growth of osteoblast cells, the track patterns provided the favourite surface for the initial cell attachment while a fast cell proliferation rate was found on the pillar pattern from day 1 to day 5 in comparison with that of a SiHA-coated surface. The alignment of actin cytoskeleton of osteoblast cells matched the orientation of the entire cell. The shear peel strength of the patterned interlocking nano-HA coating was found to be at least an order of magnitude higher than the conventional HA coating. Therefore, TAEA offers great potential for producing new coatings with a tailored surface topography, on both the micro- and nano-scale in a more cost effective way to enhance the performance of medical implants.
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Affiliation(s)
- GILLIAN MUNIR
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - JIE HUANG
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - MOHAN EDIRISINGHE
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - RAFIQUE NANGREJO
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, United Kingdom
| | - WILLIAM BONFIELD
- Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom
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Ahn SH, Lee HJ, Kim GH. Polycaprolactone Scaffolds Fabricated with an Advanced Electrohydrodynamic Direct-Printing Method for Bone Tissue Regeneration. Biomacromolecules 2011; 12:4256-63. [DOI: 10.1021/bm201126j] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Seung Hyun Ahn
- Department
of Mechanical Engineering, Bio/Nanofluidics Lab and ‡Department of Dental life science,
College of Dentistry, Chosun University, 375 Seosok-dong, Dong-gu, Gwangju 501-759, South Korea
| | - Hyeong Jin Lee
- Department
of Mechanical Engineering, Bio/Nanofluidics Lab and ‡Department of Dental life science,
College of Dentistry, Chosun University, 375 Seosok-dong, Dong-gu, Gwangju 501-759, South Korea
| | - Geun Hyung Kim
- Department
of Mechanical Engineering, Bio/Nanofluidics Lab and ‡Department of Dental life science,
College of Dentistry, Chosun University, 375 Seosok-dong, Dong-gu, Gwangju 501-759, South Korea
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Ghanbari H, Cousins BG, Seifalian AM. A Nanocage for Nanomedicine: Polyhedral Oligomeric Silsesquioxane (POSS). Macromol Rapid Commun 2011; 32:1032-46. [DOI: 10.1002/marc.201100126] [Citation(s) in RCA: 233] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Indexed: 12/28/2022]
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Bakhshi R, Darbyshire A, Evans JE, You Z, Lu J, Seifalian AM. Polymeric coating of surface modified nitinol stent with POSS-nanocomposite polymer. Colloids Surf B Biointerfaces 2011; 86:93-105. [PMID: 21515031 DOI: 10.1016/j.colsurfb.2011.03.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 03/14/2011] [Accepted: 03/18/2011] [Indexed: 11/19/2022]
Abstract
Stent angioplasty is a successful treatment for arterial occlusion, particularly in coronary artery disease. The clinical communities were enthusiastic about the use of drug-eluting stents; however, these stents have a tendency to be a contributory factor towards late stage thrombosis, leading to mortality in a significant number of patients per year. This work presents an innovative approach in self-expanding coronary stents preparation. We developed a new nanocomposite polymer based on polyhedral oligomeric silsesquioxanes (POSS) and poly(carbonate-urea)urethane (PCU), which is an antithrombogenic and a non-biodegradable polymer with in situ endothelialization properties. The aim of this work is to coat a NiTi stent alloy with POSS-PCU. In prolonged applications in the human body, the corrosion of the NiTi alloy can result in the release of deleterious ions which leads to unwanted biological reactions. Coating the nitinol (NiTi) surface with POSS-PCU can enhance surface resistance and improve biocompatibility. Electrohydrodynamic spraying was used as the polymer deposition process and thus a few experiments were carried out to compare this process with casting. Prior to deposition the NiTi has been surface modified. The peel strength of the deposit was studied before and after degradation of the coating. It is shown that the surface modification enhances the peel strength by 300%. It is also indicated how the adhesion strength of the POSS-PCU coating changes post-exposure to physiological solutions comprised of hydrolytic, oxidative, peroxidative and biological media. This part of the study shows that the modified NiTi presents far greater resistance to decay in peel strength compared to the non-modified NiTi.
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Affiliation(s)
- Raheleh Bakhshi
- University College London, Centre for Nanotechnology and Regenerative Medicine, London, UK
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Hodgkinson T, Bayat A. Dermal substitute-assisted healing: enhancing stem cell therapy with novel biomaterial design. Arch Dermatol Res 2011; 303:301-15. [PMID: 21365208 DOI: 10.1007/s00403-011-1131-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 01/12/2011] [Accepted: 01/21/2011] [Indexed: 12/17/2022]
Abstract
The use of dermal substitutes is increasingly widespread but the outcomes of substitute-assisted healing remain functionally deficient. Presently, the most successful scaffolds are acellular polymer matrices, prepared through lyophilization and phase separation techniques, designed to mimic the dermal extracellular matrix. The application of scaffolds containing viable cells has proven to be problematic due to short shelf-life, high cost and death of transplanted cells as a result of immune rejection and apoptosis. Recent advances in biomaterial science have made new techniques available capable of increasing scaffold complexity, allowing the creation of 3D microenvironments that actively control cell behaviour. Importantly, it may be possible through these sophisticated novel techniques, including bio-printing and electrospinning, to accurately direct stem cell behaviour. This complex proposal involves the incorporation of cell-matrix, cell-cell, mechanical cues and soluble factors delivered in a spatially and temporally pertinent manner. This requires accurate modelling of three-dimensional stem cell interactions within niche environments to identify key signalling molecules and mechanisms. The application of stem cells within substitutes containing such environments may result in greatly improved transplanted cell viability. Ultimately this may increase cellular organization and complexity of skin substitutes. This review discusses progress made in improving the efficacy of cellular dermal substitutes for the treatment of cutaneous defects and the potential of evolving new technology to improve current results.
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Affiliation(s)
- T Hodgkinson
- Plastic and Reconstructive Surgery Research, Manchester Interdisciplinary Biocentre, University of Manchester, UK
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Teo WE, Inai R, Ramakrishna S. Technological advances in electrospinning of nanofibers. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2011; 12:013002. [PMID: 27877375 PMCID: PMC5090397 DOI: 10.1088/1468-6996/12/1/11660944] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 02/16/2011] [Accepted: 12/06/2010] [Indexed: 05/29/2023]
Abstract
Progress in the electrospinning techniques has brought new methods for the production and construction of various nanofibrous assemblies. The parameters affecting electrospinning include electrical charges on the emerging jet, charge density and removal, as well as effects of external perturbations. The solvent and the method of fiber collection also affect the construction of the final nanofibrous architecture. Various techniques of yarn spinning using solid and liquid surfaces as well as surface-free collection are described and compared in this review. Recent advances allow production of 3D nanofibrous scaffolds with a desired microstructure. In the area of tissue regeneration and bioengineering, 3D scaffolds should bring nanofibrous technology closer to clinical applications. There is sufficient understanding of the electrospinning process and experimental results to suggest that precision electrospinning is a real possibility.
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Affiliation(s)
- Wee-Eong Teo
- Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
- Biomers Pte Ltd, 18 Boon Lay Way, Singapore 609966, Singapore
| | | | - Seeram Ramakrishna
- Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
- King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
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Teo WE, Inai R, Ramakrishna S. Technological advances in electrospinning of nanofibers. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2011. [PMID: 27877375 DOI: 10.1088/1468-6996/12/1/013002] [Citation(s) in RCA: 152] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Progress in the electrospinning techniques has brought new methods for the production and construction of various nanofibrous assemblies. The parameters affecting electrospinning include electrical charges on the emerging jet, charge density and removal, as well as effects of external perturbations. The solvent and the method of fiber collection also affect the construction of the final nanofibrous architecture. Various techniques of yarn spinning using solid and liquid surfaces as well as surface-free collection are described and compared in this review. Recent advances allow production of 3D nanofibrous scaffolds with a desired microstructure. In the area of tissue regeneration and bioengineering, 3D scaffolds should bring nanofibrous technology closer to clinical applications. There is sufficient understanding of the electrospinning process and experimental results to suggest that precision electrospinning is a real possibility.
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Affiliation(s)
- Wee-Eong Teo
- Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore; Biomers Pte Ltd, 18 Boon Lay Way, Singapore 609966, Singapore
| | | | - Seeram Ramakrishna
- Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore; King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
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Ghanbari H, Marashi SM, Rafiei Y, Chaloupka K, Seifalian AM. Biomedical Application of Polyhedral Oligomeric Silsesquioxane Nanoparticles. ADVANCES IN SILICON SCIENCE 2011. [DOI: 10.1007/978-90-481-3787-9_9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Kim GH, Ahn SH, Lee HJ, Lee S, Cho Y, Chun W. A new hybrid scaffold using rapid prototyping and electrohydrodynamic direct writing for bone tissue regeneration. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm13712c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Parkinson LG, Giles NL, Adcroft KF, Fear MW, Wood FM, Poinern GE. The potential of nanoporous anodic aluminium oxide membranes to influence skin wound repair. Tissue Eng Part A 2010; 15:3753-63. [PMID: 19527180 DOI: 10.1089/ten.tea.2008.0594] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Cells respond to changes in the environment by altering their phenotype. The ability to influence cell behavior by modifying their environment provides an opportunity for therapeutic application, for example, to promote faster wound healing in response to skin injury. Here, we have modified the preparation of an aluminium oxide template to generate large uniform membranes with differing nano-pore sizes. Epidermal cells (keratinocytes) and dermal cells (fibroblasts) readily adhere to these nanoporous membranes. The pore size appears to influence the rate of cell proliferation and migration, important aspects of cell behavior during wound healing. The suitability of the membrane to act as a dressing after a burn injury was assessed in vivo; application of the membrane demonstrated adherence and conformability to the skin surface of a pig, with no observed degradation or detrimental effect on the repair. Our results suggest that keratinocytes are sensitive to changes in topography at the nanoscale level and that this property may be exploited to improve wound repair after tissue injury.
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Affiliation(s)
- Leigh G Parkinson
- Department of Physics and Nanoscience, School of Engineering and Energy, Murdoch University, Perth, Australia.
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Mouriño V, Boccaccini AR. Bone tissue engineering therapeutics: controlled drug delivery in three-dimensional scaffolds. J R Soc Interface 2009; 7:209-27. [PMID: 19864265 DOI: 10.1098/rsif.2009.0379] [Citation(s) in RCA: 398] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This paper provides an extensive overview of published studies on the development and applications of three-dimensional bone tissue engineering (TE) scaffolds with potential capability for the controlled delivery of therapeutic drugs. Typical drugs considered include gentamicin and other antibiotics generally used to combat osteomyelitis, as well as anti-inflammatory drugs and bisphosphonates, but delivery of growth factors is not covered in this review. In each case reviewed, special attention has been given to the technology used for controlling the release of the loaded drugs. The possibility of designing multifunctional three-dimensional bone TE scaffolds for the emerging field of bone TE therapeutics is discussed. A detailed summary of drugs included in three-dimensional scaffolds and the several approaches developed to combine bioceramics with various polymeric biomaterials in composites for drug-delivery systems is included. The main results presented in the literature are discussed and the remaining challenges in the field are summarized with suggestions for future research directions.
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Affiliation(s)
- Viviana Mouriño
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2BP, UK
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35
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Kai H, Wang X, Madhukar KS, Qin L, Yan Y, Zhang R, Wang X. Fabrication of a two-level tumor bone repair biomaterial based on a rapid prototyping technique. Biofabrication 2009; 1:025003. [DOI: 10.1088/1758-5082/1/2/025003] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Xiahong Wang, Tongkui Cui, Yongnian Yan, Renji Zhang. Peroneal Nerve Regeneration Using a Unique Bilayer Polyurethane-collagen Guide Conduit. J BIOACT COMPAT POL 2009. [DOI: 10.1177/0883911508101183] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Unique double layer polyurethane (PU)-collagen nerve guide conduits with desirable biocompatibility and mechanical properties were fabricated using a newly developed double-nozzle low-temperature deposition manufacturing (DLDM) technique. The inner collagen layer of the conduit had oriented nano-size filaments with micro-pores (pore size 20—100μm) that permitted nutrient infiltration, while the outer PU layer had micro-pores (pore size 15—20 μm) preventing fibrous tissue invasion. In vivo animal tests (n = 6) on bridging a 10 mm long peroneal nerve defect was conducted using rats. Single layer pure PU conduit (n = 6) was used as the positive control and the same size defect with no implantation (n = 2) as the negative control. Through walk track analysis as well as electrophysiological and histological evaluations of the regenerated nerves, the double layer PU-collagen conduit demonstrated better nerve repair than the controls. This new PU-collagen has the potential for significant clinical applications in peripheral nerve repair.
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Affiliation(s)
- Xiahong Wang
- Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, , Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Tongkui Cui
- Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Yongnian Yan
- Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Renji Zhang
- Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
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de Mel A, Bolvin C, Edirisinghe M, Hamilton G, Seifalian AM. Development of cardiovascular bypass grafts: endothelialization and applications of nanotechnology. Expert Rev Cardiovasc Ther 2009; 6:1259-77. [PMID: 18939913 DOI: 10.1586/14779072.6.9.1259] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
There is a critical clinical need for small-diameter bypass grafts, with applications involved in the coronary artery and lower limb. Commercially available materials give rise to unfavorable responses when in contact with blood and subjected to low-flow hemodynamics and, thus, are nonideal as small-diameter bypass grafts. Optimizing the mechanical properties to match both the native artery and the graft surfaces has received keen attention. Endothelialization of bypass grafts is considered a protective mechanism where the biochemicals produced from endothelial cells exert a range of favorable responses, including antithrombotic, noninflammatory responses and inhibition of intimal hyperplasia. In situ endothelialization is most desirable. Nanotechnology approaches facilitate all aspects of endothelialization, including endothelial progenitor cell mobilization, migration, adhesion, proliferation and differentiation. 'Surface nanoarchitecturing mechanisms', which mimic the natural extracellular matrix to optimize endothelial progenitor cell interaction and controlled delivery of various factors in the form of nanoparticles, which can be combined with gene therapy, are of keen interest. This article discusses the development of bypass grafts, focusing on the optimization of the biological properties of mechanically suitable grafts.
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Affiliation(s)
- Achala de Mel
- Centre of Nanotechnology, Biomaterial and Tissue Engineering, UCL Division of Surgery and Interventional Science, University College London, London, UK
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Nangrejo M, Ahmad Z, Stride E, Edirisinghe M, Colombo P. Preparation of polymeric and ceramic porous capsules by a novel electrohydrodynamic process. Pharm Dev Technol 2008; 13:425-32. [PMID: 18720243 DOI: 10.1080/10837450802247929] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The preparation of capsules for medical and industrial use can be achieved via several conventional routes, yielding either hard or soft receptacles, depending on the type and the content of the material to be encapsulated. Together with tablets, capsules are amongst the most commonly used means of administering medication and this makes progress in capsule preparation technology a key area of drug delivery research. Here we uncover new technology for the preparation of capsules with porous chambers. The novelty is signified in the use of an electrohydrodynamic process engineering route and its potential is elucidated using a polymeric material; polymethylsilsesquioxane, which can be converted into an identical ceramic form by means of simple pyrolysis. Thus, both polymeric and ceramic capsules have been prepared. The effects of process control parameters such as the applied voltage and flow rate, on the characteristics of the capsules prepared are discussed.
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Affiliation(s)
- M Nangrejo
- Department of Mechanical Engineering, University College London, London, UK
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39
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Ahmad Z, Zhang HB, Farook U, Edirisinghe M, Stride E, Colombo P. Generation of multilayered structures for biomedical applications using a novel tri-needle coaxial device and electrohydrodynamic flow. J R Soc Interface 2008; 5:1255-61. [PMID: 18647737 DOI: 10.1098/rsif.2008.0247] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In this short communication, we describe the scope and flexibility of using a novel device containing three coaxially arranged needles to form a variety of novel morphologies. Different combinations of materials are subjected to controlled flow through the device under the influence of an applied electric field. The resulting electrohydrodynamic flow allows us to prepare double-layered bubbles, porous encapsulated threads and nanocapsules containing three layers. The ability to process such multilayered structures is very significant for biomedical engineering applications, for example, generating capsules for drug delivery, which can provide multistage controlled release.
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Affiliation(s)
- Z Ahmad
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.
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40
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Ahmad Z, Zhang HB, Farook U, Edirisinghe M, Stride E, Colombo P. Generation of multilayered structures for biomedical applications using a novel tri-needle coaxial device and electrohydrodynamic flow. J R Soc Interface 2008; 19:3093-104. [PMID: 18392668 DOI: 10.1007/s10856-008-3436-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Accepted: 03/11/2008] [Indexed: 04/28/2023] Open
Abstract
In this short communication, we describe the scope and flexibility of using a novel device containing three coaxially arranged needles to form a variety of novel morphologies. Different combinations of materials are subjected to controlled flow through the device under the influence of an applied electric field. The resulting electrohydrodynamic flow allows us to prepare double-layered bubbles, porous encapsulated threads and nanocapsules containing three layers. The ability to process such multilayered structures is very significant for biomedical engineering applications, for example, generating capsules for drug delivery, which can provide multistage controlled release.
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Affiliation(s)
- Z Ahmad
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.
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41
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Wang X, Yan Y, Zhang R. Rapid prototyping as a tool for manufacturing bioartificial livers. Trends Biotechnol 2007; 25:505-13. [PMID: 17949840 DOI: 10.1016/j.tibtech.2007.08.010] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2007] [Revised: 07/25/2007] [Accepted: 08/31/2007] [Indexed: 12/20/2022]
Abstract
Rapid prototyping (RP) technologies are a set of manufacturing processes that can produce very complex structures directly from computer-aided design models without structure-specific tools or knowledge. These technologies might eventually enable the manufacture of human livers to create functional substitutes for treating liver failure or dysfunctionality. However, the approaches used currently face many challenges, such as the complex branched vascular and bile ductular systems and the variety of cell types, matrices and regulatory factors involved in liver development. Here, we discuss the challenges and provide evidence for the usefulness of RP in overcoming them.
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Affiliation(s)
- Xiaohong Wang
- Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China.
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