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Thorshaug K, Didriksen T, Jensen IT, Almeida Carvalho P, Yang J, Grandcolas M, Ferber A, Booth AM, Ağaç Ö, Alagöz H, Erdoğan N, Kuban A, Belle BD. Orientation of reduced graphene oxide in composite coatings. NANOSCALE ADVANCES 2024; 6:2088-2095. [PMID: 38633045 PMCID: PMC11019492 DOI: 10.1039/d3na01057k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 03/08/2024] [Indexed: 04/19/2024]
Abstract
Composite coatings containing reduced graphene oxide (rGO) and 3-(aminopropyl)triethoxysilane functionalised rGO (APTES-rGO) were prepared by sol-gel technology and deposited on Al 2024 T-3. Covalent functionalisation of GO by APTES occurred by formation of amide bonds, accompanied by GO reduction. The thin sheets were retained. The hydrophilicity of the coating increased when APTES-rGO was added. The opposite was observed when GO was added. A key finding is that the rGO flakes agglomerate and lie in a random orientation in the coating, whereas the APTES-rGO flakes are more evenly distributed in the matrix and appear to lie along the plane of the substrate.
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Affiliation(s)
| | | | | | | | - Juan Yang
- SINTEF Industri Forskningsveien 1 NO-0373 Oslo Norway
| | | | - Alain Ferber
- SINTEF Digital Forskningsveien 1 NO-0373 Oslo Norway
| | - Andy M Booth
- SINTEF Ocean Brattørkaia 17C NO-7010 Trondheim Norway
| | - Özlem Ağaç
- Nanografi Nanotechnology AS ODTÜ Teknokent No: 13/1-1 06531 Çankaya Ankara Turkey
| | - Hüseyin Alagöz
- Nanografi Nanotechnology AS ODTÜ Teknokent No: 13/1-1 06531 Çankaya Ankara Turkey
| | - Nursev Erdoğan
- Turkish Aerospace, Functional Coatings & Transparencies Technology Centre Ankara Turkey
| | - Anıl Kuban
- Turkish Aerospace, Functional Coatings & Transparencies Technology Centre Ankara Turkey
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Nagarajan A, Rizwana N, Abraham M, Bhat M, Vetekar A, Thakur G, Chakraborty U, Agarwal V, Nune M. Polycaprolactone/graphene oxide/acellular matrix nanofibrous scaffolds with antioxidant and promyelinating features for the treatment of peripheral demyelinating diseases. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2023; 34:49. [PMID: 37796399 PMCID: PMC10556163 DOI: 10.1007/s10856-023-06750-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 08/24/2023] [Indexed: 10/06/2023]
Abstract
Peripheral demyelinating diseases entail damage to axons and Schwann cells in the peripheral nervous system. Because of poor prognosis and lack of a cure, this group of diseases has a global impact. The primary underlying cause of these diseases involves the inability of Schwann cells to remyelinate the damaged insulating myelin around axons, resulting in neuronal death over time. In the past decade, extensive research has been directed in the direction of Schwann cells focusing on their physiological and neuroprotective effects on the neurons in the peripheral nervous system. One cause of dysregulation in the remyelinating function of Schwann cells has been associated with oxidative stress. Tissue-engineered biodegradable scaffolds that can stimulate remyelination response in Schwann cells have been proposed as a potential treatment strategy for peripheral demyelinating diseases. However, strategies developed to date primarily focussed on either remyelination or oxidative stress in isolation. Here, we have developed a multifunctional nanofibrous scaffold with material and biochemical cues to tackle both remyelination and oxidative stress in one matrix. We developed a nanofibrous scaffold using polycaprolactone (PCL) as a foundation loaded with antioxidant graphene oxide (GO) and coated this bioscaffold with Schwann cell acellular matrix. In vitro studies revealed both antioxidant and remyelination properties of the developed bioscaffold. Based on the results, the developed multifunctional bioscaffold approach can be a promising biomaterial approach for treating demyelinating diseases.
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Affiliation(s)
- Aishwarya Nagarajan
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Nasera Rizwana
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Michelle Abraham
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Mahima Bhat
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Aakanksha Vetekar
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
- Department. of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Goutam Thakur
- Department. of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Uttara Chakraborty
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Vipul Agarwal
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
| | - Manasa Nune
- Manipal Institute of Regenerative Medicine, Bengaluru, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
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Railian S, Fadil Y, Agarwal V, Junkers T, Zetterlund PB. Synthesis of electrically conducting nanocomposites via Pickering miniemulsion polymerization: Effect of graphene oxide functionalized with different capping agents. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Thermally Conductive Poly(lactic acid) Composites with Superior Electromagnetic Shielding Performances via 3D Printing Technology. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2673-9
expr 921341742 + 922448849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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Fadil Y, Thickett SC, Agarwal V, Zetterlund PB. Synthesis of graphene-based polymeric nanocomposites using emulsion techniques. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2021.101476] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Ma TB, Ma H, Ruan KP, Shi XT, Qiu H, Gao SY, Gu JW. Thermally Conductive Poly(lactic acid) Composites with Superior Electromagnetic Shielding Performances via 3D Printing Technology. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2673-9] [Citation(s) in RCA: 59] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ramana LN, Agarwal V. Nanodiamonds synthesis using sustainable concentrated solar thermal energy: applications in bioimaging and phototherapy. NANOTECHNOLOGY 2021; 32:475602. [PMID: 34380124 DOI: 10.1088/1361-6528/ac1cbd] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
There is a renewed interest in nanodiamonds and their applications in biology and medicine, especially in bioimaging and photothermal therapy. This is due to their small size, chemical inertness and unique photo-properties such as bright and robust fluorescence, resistant to photobleaching and photothermal response under near infrared (NIR) irradiation. However, the biggest challenge limiting the wide-spread use of nanodiamonds is the high-energy consuming, dangerous and sophisticated synthetic methods currently adopted by industry named higher temperature high pressure approach, and detonation method. Despite over a decade of research towards the development of new synthetic approaches, most of the methods developed to date require sophisticated instrumentations and have high energy demand. To circumvent the reliance on high energy demanding sophisticated experimental setups, here we present a simple synthetic approach using solar energy as a sustainable sole energy source. Using low-grade coal as carbon precursor, we used high power magnifying glasses to concentrate and focus sunlight to induce synthesis of nanodiamonds. The synthesized nanodiamonds exhibit similar physicochemical and photo-properties as nanodiamonds synthesized using other synthetic approaches.In vitrostudies using macrophage Raw 264.7 cells demonstrated rapid uptake and bright fluorescence of the synthesized nanodiamonds with superior biocompatibility (≥95% cell viability). The synthesized nanodiamonds also exhibited dose dependent photothermal response under NIR irradiation.
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Affiliation(s)
- Lakshmi Narashimhan Ramana
- Multidisciplinary Clinical and Translational Research group (MCTR), Translational Health Science and Technology Institute (THSTI), Faridabad 121001, India
| | - Vipul Agarwal
- Cluster for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
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Zhang X, Chen J, Liu T. Physical Origin of Distinct Mechanical Properties of Polymer Tethered Graphene Nanosheets Reinforced Polymer Nanocomposites Revealed by Nonequilibrium Molecular Dynamics Simulations. MACROMOL THEOR SIMUL 2021. [DOI: 10.1002/mats.202100044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xu Zhang
- Innovation Center for Textile Science and Technology, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China
| | - Jialiang Chen
- National Garment and Accessories Quality Supervision Testing Center (Fujian), Fujian Provincial Key Laboratory of Textiles Inspection Technology Fujian Fiber Inspection Center Fuzhou Fujian 350026 P. R. China
| | - Tianxi Liu
- Innovation Center for Textile Science and Technology, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University Shanghai 201620 P. R. China
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi Jiangsu 214122 P. R. China
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