1
|
Roy R, Holec D, Michal L, Hemzal D, Sarkar S, Sandeep Kumar G, Nečas D, Dhankhar M, Kaushik P, Jénnifer Gómez I, Zajíčková L. Possible charge ordering and anomalous transport in graphene/graphene quantum dot heterostructure. J Phys Condens Matter 2024; 36:265601. [PMID: 38457842 DOI: 10.1088/1361-648x/ad31bf] [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: 11/17/2023] [Accepted: 03/08/2024] [Indexed: 03/10/2024]
Abstract
Observations of superconductivity and charge density waves (CDW) in graphene have been elusive thus far due to weak electron-phonon coupling (EPC) interactions. Here, we report a unique observation of anomalous transport and multiple charge ordering phases at high temperatures (T1∼213K,T2∼325K) in a 0D-2D van der Waals (vdW) heterostructure comprising of single layer graphene (SLG) and functionalized (amine) graphene quantum dots (GQD). The presence of functionalized GQD contributed to charge transfer with shifting of the Dirac point ∼ 0.05 eV above the Fermi level (ab initio simulations) and carrier densityn∼-0.3×1012 cm-2confirming p-doping in SLG and two-fold increase in EPC interaction was achieved. Moreover, we elucidate the interplay between electron-electron and electron-phonon interactions to substantiate high temperature EPC driven charge ordering in the heterostructure through analyses of magnetotransport and weak anti-localization (WAL) framework. Our results provide impetus to investigate strongly correlated phenomena such as CDW and superconducting phase transitions in novel graphene based heterostructures.
Collapse
Affiliation(s)
- Rajarshi Roy
- Central European Institute of Technology, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - David Holec
- Department of Materials Science, Montanuniversität Leoben, Franz-Josef-Strasse 18, A-8700 Leoben, Austria
| | - Lukáš Michal
- Central European Institute of Technology, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - Dušan Hemzal
- Department of Condensed Matter Physics, Masaryk University, Kotlářská, 611 37 Brno, Czech Republic
| | - Saikat Sarkar
- Thin Film and Nanoscience Lab, Department of Physics, Jadavpur University, Kolkata 700032, India
| | - Gundam Sandeep Kumar
- Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, 3001 Heverlee, Belgium
| | - David Nečas
- Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Meena Dhankhar
- National Centre for Nano Fabrication and Characterization, Oersteds Plads-Building 347, Kongens Lyngby 2800 DK, Denmark
| | - Preeti Kaushik
- Department of Condensed Matter Physics, Masaryk University, Kotlářská, 611 37 Brno, Czech Republic
| | - I Jénnifer Gómez
- Department of Condensed Matter Physics, Masaryk University, Kotlářská, 611 37 Brno, Czech Republic
- Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, Rúa as Carballeiras, 15071 A Coruña, Spain
| | - Lenka Zajíčková
- Department of Condensed Matter Physics, Masaryk University, Kotlářská, 611 37 Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| |
Collapse
|
2
|
Gómez IJ, Ovejero-Paredes K, Méndez-Arriaga JM, Pizúrová N, Filice M, Zajíčková L, Prashar S, Gómez-Ruiz S. Organotin(IV)-Decorated Graphene Quantum Dots as Dual Platform for Molecular Imaging and Treatment of Triple Negative Breast Cancer. Chemistry 2023; 29:e202301845. [PMID: 37540499 DOI: 10.1002/chem.202301845] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/27/2023] [Accepted: 08/01/2023] [Indexed: 08/05/2023]
Abstract
The pharmacological activity of organotin(IV) complexes in cancer therapy is well recognized but their large applicability is hampered by their poor water solubility. Hence, carbon dots, in particular nitrogen-doped graphene quantum dots (NGQDs), may be a promising alternative for the efficient delivery of organotin(IV) compounds as they have a substantial aqueous solubility, a good chemical stability, and non-toxicity as well as a bright photoluminescence that make them ideal for theranostic applications against cancer. Two different multifunctional nanosystems have been synthesized and fully characterized based on two fragments of organotin-based cytotoxic compounds and 4-formylbenzoic acid (FBA), covalently grafted onto the NGQDs surface. Subsequently, an in vitro determination of the therapeutic and theranostic potential of the achieved multifunctional systems was carried out. The results showed a high cytotoxic potential of the NGQDs-FBA-Sn materials against breast cancer cell line (MDA-MB-231) and a lower effect on a non-cancer cell line (kidney cells, HEK293T). Besides, thanks to their optical properties, the dots enabled their fluorescence molecular imaging in the cytoplasmatic region of the cells pointing towards a successful cellular uptake and a release of the metallodrug inside cancer cells (NGQDs-FBA-Sn).
Collapse
Affiliation(s)
- I Jénnifer Gómez
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137, Brno, Czech Republic
- Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, Rúa as Carballeiras, 15071 A, Coruña, Spain
| | - Karina Ovejero-Paredes
- Nanobiotechnology for Life Sciences Group, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal, 28040, Madrid, Spain
- Microscopy and Dynamic Imaging Unit, Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Calle Melchor Fernández Almagro 3, E-28029, Madrid, Spain
| | - José Manuel Méndez-Arriaga
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933, Móstoles, Madrid, Spain
| | - Naděžda Pizúrová
- Institute of Physics of Materials, Czech Academy of Sciences, 61662, Brno, Czech Republic
| | - Marco Filice
- Nanobiotechnology for Life Sciences Group, Departamento de Química en Ciencias Farmacéuticas, Facultad de Farmacia, Universidad Complutense de Madrid (UCM), Plaza Ramón y Cajal, 28040, Madrid, Spain
- Microscopy and Dynamic Imaging Unit, Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Calle Melchor Fernández Almagro 3, E-28029, Madrid, Spain
| | - Lenka Zajíčková
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137, Brno, Czech Republic
- Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, 61200, Brno, Czech Republic
| | - Sanjiv Prashar
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933, Móstoles, Madrid, Spain
| | - Santiago Gómez-Ruiz
- COMET-NANO Group, Departamento de Biología y Geología, Física y Química Inorgánica, E.S.C.E.T., Universidad Rey Juan Carlos, Calle Tulipán s/n, E-28933, Móstoles, Madrid, Spain
| |
Collapse
|
3
|
Janů L, Dvořáková E, Polášková K, Buchtelová M, Ryšánek P, Chlup Z, Kruml T, Galmiz O, Nečas D, Zajíčková L. Enhanced Adhesion of Electrospun Polycaprolactone Nanofibers to Plasma-Modified Polypropylene Fabric. Polymers (Basel) 2023; 15:polym15071686. [PMID: 37050300 PMCID: PMC10097108 DOI: 10.3390/polym15071686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/16/2023] [Accepted: 03/23/2023] [Indexed: 03/31/2023] Open
Abstract
Excellent adhesion of electrospun nanofiber (NF) to textile support is crucial for a broad range of their bioapplications, e.g., wound dressing development. We compared the effect of several low- and atmospheric pressure plasma modifications on the adhesion between two parts of composite—polycaprolactone (PCL) nanofibrous mat (functional part) and polypropylene (PP) spunbond fabric (support). The support fabrics were modified before electrospinning by low-pressure plasma oxygen treatment or amine plasma polymer thin film or treated by atmospheric pressure plasma slit jet (PSJ) in argon or argon/nitrogen. The adhesion was evaluated by tensile test and loop test adapted for thin NF mat measurement and the trends obtained by both tests largely agreed. Although all modifications improved the adhesion significantly (at least twice for PSJ treatments), low-pressure oxygen treatment showed to be the most effective as it strengthened adhesion by a factor of six. The adhesion improvement was ascribed to the synergic effect of high treatment homogeneity with the right ratio of surface functional groups and sufficient wettability. The low-pressure modified fabric also stayed long-term hydrophilic (ten months), even though surfaces usually return to a non-wettable state (hydrophobic recovery). In contrast to XPS, highly surface-sensitive water contact angle measurement proved suitable for monitoring subtle surface changes.
Collapse
Affiliation(s)
- Lucie Janů
- Plasma Technologies for Materials, Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Correspondence: (L.J.); (L.Z.)
| | - Eva Dvořáková
- Plasma Technologies for Materials, Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Kateřina Polášková
- Plasma Technologies for Materials, Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Martina Buchtelová
- Plasma Technologies for Materials, Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Petr Ryšánek
- Faculty of Science, J.E. Purkyně University, Pasteurova 15, 400 96 Ústí nad Labem, Czech Republic
| | - Zdeněk Chlup
- Institute of Physics of Materials, The Czech Academy of Sciences, Žižkova 22, 616 00 Brno, Czech Republic
| | - Tomáš Kruml
- Institute of Physics of Materials, The Czech Academy of Sciences, Žižkova 22, 616 00 Brno, Czech Republic
| | - Oleksandr Galmiz
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - David Nečas
- Plasma Technologies for Materials, Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Lenka Zajíčková
- Plasma Technologies for Materials, Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
- Department of Theoretical and Experimental Electrical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technická 12, 616 00 Brno, Czech Republic
- Correspondence: (L.J.); (L.Z.)
| |
Collapse
|
4
|
Michal L, Roy R, Holec D, Gómez IJ, Pizúrová N, Nečas D, Dolečková A, Medalová J, Lepcio P, Zajíčková L. Long-Range Magnetic Order in Nickel Hydroxide-Functionalized Graphene Quantum Dots. J Phys Chem Lett 2022; 13:11536-11542. [PMID: 36475701 DOI: 10.1021/acs.jpclett.2c02964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this work, we demonstrate the prospect of chemically synthesizing transition metal (Ni) doped magnetic graphene quantum dots (GQDs) with the sole aim of shedding light on their magnetic properties. Our results show that adsorption of nickel hydroxide on predominantly paramagnetic GQDs reveals antiferromagnetic ordering in the M-T profile around 10 K with change of the spin exchange coupling deviating from J = 1/2 to J = 1, mainly arising from the d-p mixing hybridization between the p orbital of carbon from the GQD and the d orbital of Ni. Furthermore, our results are well complemented by ab initio simulations showing asymmetry of the up and down spins around the Fermi level for nickel hydroxide-doped GQDs with long-range spin polarization. Furthermore, the magnitude of the net magnetic moment generated for doped GQDs on the carbon atoms is found to be site-dependent (surface or edge).
Collapse
Affiliation(s)
- Lukáš Michal
- CEITEC, Masaryk University, Kamenice 5, 62500Brno, Czech Republic
| | - Rajarshi Roy
- CEITEC, Masaryk University, Kamenice 5, 62500Brno, Czech Republic
| | - David Holec
- Department of Materials Science, Montanuniversität Leoben, Franz-Josef-Strasse 18, A-8700Leoben, Austria
| | - I Jénnifer Gómez
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137Brno, Czech Republic
| | - Naděžda Pizúrová
- Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, 61662Brno, Czech Republic
| | - David Nečas
- Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, 61200Brno, Czech Republic
| | - Anna Dolečková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 62500Brno, Czech Republic
| | - Jiřina Medalová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 62500Brno, Czech Republic
| | - Petr Lepcio
- Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, 61200Brno, Czech Republic
| | - Lenka Zajíčková
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137Brno, Czech Republic
- Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, 61200Brno, Czech Republic
| |
Collapse
|
5
|
Muñoz J, Palacios-Corella M, Gómez IJ, Zajíčková L, Pumera M. Synthetic Nanoarchitectonics of Functional Organic-Inorganic 2D Germanane Heterostructures via Click Chemistry. Adv Mater 2022; 34:e2206382. [PMID: 36113982 DOI: 10.1002/adma.202206382] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Succeeding graphene, 2D inorganic materials made of reactive van der Waals layers, like 2D germanane (2D-Ge) derivatives, have attracted great attention because their physicochemical characteristics can be entirely tuned by modulating the nature of the surface substituent. Although very interesting from a scientific point of view, almost all the reported works involving 2D-Ge derivatives are focused on computational studies. Herein, a first prototype of organic-inorganic 2D-Ge heterostructure has been synthesized by covalently anchoring thiol-rich carbon dots (CD-SH) onto 2D allyl germanane (2D-aGe) via a simple and green "one-pot" click chemistry approach. Remarkably, the implanted characteristics of the carbon nanomaterial provide new physicochemical features to the resulting 0D/2D heterostructure, making possible its implementation in yet unexplored optoelectronic tasks-e.g., as a fluorescence resonance energy transfer (FRET) sensing system triggered by supramolecular π-π interactions-that are inaccessible for the pristine 2D-aGe counterpart. Consequently, this work builds a foundation toward the robust achievement of functional organic-inorganic 2D-Ge nanoarchitectonics through covalently assembling thiol-rich carbon nanoallotropes on commercially available 2D-aGe.
Collapse
Affiliation(s)
- Jose Muñoz
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
| | - Mario Palacios-Corella
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
| | - I Jénnifer Gómez
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
- Plasma Technologies, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
| | - Lenka Zajíčková
- Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
- Plasma Technologies, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
| | - Martin Pumera
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
- Department of Medical Research, China Medical University Hospital, China Medical University, No. 91 Hsueh-Shih Road, Taichung, 40402, Taiwan
- Faculty of Electrical Engineering and Computer Science, VSB - Technical University of Ostrava, 17. listopadu 2172/15, Ostrava, 70800, Czech Republic
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea
| |
Collapse
|
6
|
Roy R, Holec D, Kratzer M, Muenzer P, Kaushik P, Michal L, Kumar GS, Zajíčková L, Teichert C. Probing the charge transfer and electron-hole asymmetry in graphene-graphene quantum dot heterostructure. Nanotechnology 2022; 33:325704. [PMID: 35504253 DOI: 10.1088/1361-6528/ac6c38] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/03/2022] [Indexed: 06/14/2023]
Abstract
In recent years, graphene-based van der Waals (vdW) heterostructures have come into prominence showcasing interesting charge transfer dynamics which is significant for optoelectronic applications. These novel structures are highly tunable depending on several factors such as the combination of the two-dimensional materials, the number of layers and band alignment exhibiting interfacial charge transfer dynamics. Here, we report on a novel graphene based 0D-2D vdW heterostructure between graphene and amine-functionalized graphene quantum dots (GQD) to investigate the interfacial charge transfer and doping possibilities. Using a combination ofab initiosimulations and Kelvin probe force microscopy (KPFM) measurements, we confirm that the incorporation of functional GQDs leads to a charge transfer induced p-type doping in graphene. A shift of the Dirac point by 0.05 eV with respect to the Fermi level (EF) in the graphene from the heterostructure was deduced from the calculated density of states. KPFM measurements revealed an increment in the surface potential of the GQD in the 0D-2D heterostructure by 29 mV with respect to graphene. Furthermore, we conducted power dependent Raman spectroscopy for both graphene and the heterostructure samples. An optical doping-induced gating effect resulted in a stiffening of theGband for electrons and holes in both samples (graphene and the heterostructure), suggesting a breakdown of the adiabatic Born-Oppenheimer approximation. Moreover, charge imbalance and renormalization of the electron-hole dispersion under the additional influence of the doped functional GQDs is pointing to an asymmetry in conduction and carrier mobility.
Collapse
Affiliation(s)
- Rajarshi Roy
- CEITEC, Masaryk University, Kamenice, 62500 Brno, Czech Republic
| | - David Holec
- Department of Materials Science, Montanuniversität Leoben, Franz-Josef-Strasse 18, A-8700 Leoben, Austria
| | - Markus Kratzer
- Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse. 18, A-8700 Leoben, Austria
| | - Philipp Muenzer
- Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse. 18, A-8700 Leoben, Austria
| | - Preeti Kaushik
- CEITEC, Masaryk University, Kamenice, 62500 Brno, Czech Republic
| | - Lukáš Michal
- CEITEC, Masaryk University, Kamenice, 62500 Brno, Czech Republic
| | - Gundam Sandeep Kumar
- Solar Cells and Photonics Research Laboratory, School of Chemistry, University of Hyderabad, 500 46 Hyderabad, Telangana, India
| | - Lenka Zajíčková
- Department of Condensed Matter Physics, Masaryk University, Kotlářská, 611 37 Brno, Czech Republic
- CEITEC, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic
| | - Christian Teichert
- Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse. 18, A-8700 Leoben, Austria
| |
Collapse
|
7
|
Manakhov AM, Sitnikova NA, Tsygankova AR, Alekseev AY, Adamenko LS, Permyakova E, Baidyshev VS, Popov ZI, Blahová L, Eliáš M, Zajíčková L, Solovieva AO. Electrospun Biodegradable Nanofibers Coated Homogenously by Cu Magnetron Sputtering Exhibit Fast Ion Release. Computational and Experimental Study. Membranes (Basel) 2021; 11:965. [PMID: 34940466 PMCID: PMC8708309 DOI: 10.3390/membranes11120965] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/03/2021] [Accepted: 12/04/2021] [Indexed: 11/30/2022]
Abstract
Copper-coated nanofibrous materials are desirable for catalysis, electrochemistry, sensing, and biomedical use. The preparation of copper or copper-coated nanofibers can be pretty challenging, requiring many chemical steps that we eliminated in our robust approach, where for the first time, Cu was deposited by magnetron sputtering onto temperature-sensitive polymer nanofibers. For the first time, the large-scale modeling of PCL films irradiation by molecular dynamics simulation was performed and allowed to predict the ions penetration depth and tune the deposition conditions. The Cu-coated polycaprolactone (PCL) nanofibers were thoroughly characterized and tested as antibacterial agents for various Gram-positive and Gram-negative bacteria. Fast release of Cu2+ ions (concentration up to 3.4 µg/mL) led to significant suppression of E. coli and S. aureus colonies but was insufficient against S. typhimurium and Ps. aeruginosa. The effect of Cu layer oxidation upon contact with liquid media was investigated by X-ray photoelectron spectroscopy revealing that, after two hours, 55% of Cu atoms are in form of CuO or Cu(OH)2. The Cu-coated nanofibers will be great candidates for wound dressings thanks to an interesting synergistic effect: on the one hand, the rapid release of copper ions kills bacteria, while on the other hand, it stimulates the regeneration with the activation of immune cells. Indeed, copper ions are necessary for the bacteriostatic action of cells of the immune system. The reactive CO2/C2H4 plasma polymers deposited onto PCL-Cu nanofibers can be applied to grafting of viable proteins, peptides, or drugs, and it further explores the versatility of developed nanofibers for biomedical applications use.
Collapse
Affiliation(s)
- Anton M. Manakhov
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
| | - Natalya A. Sitnikova
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
| | - Alphiya R. Tsygankova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia;
| | - Alexander Yu. Alekseev
- Research Institute of Virology, The Federal Research Center of Fundamental and Translational Medicine, 2 Timakova St., 630060 Novosibirsk, Russia; (A.Y.A.); (L.S.A.)
- Research Institute of Applied Ecology, Dagestan State University, Dahadaeva 21, 367000 Makhachkala, Russia
| | - Lyubov S. Adamenko
- Research Institute of Virology, The Federal Research Center of Fundamental and Translational Medicine, 2 Timakova St., 630060 Novosibirsk, Russia; (A.Y.A.); (L.S.A.)
| | - Elizaveta Permyakova
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISiS”, Leninsky Prospekt 4, 119071 Moscow, Russia
| | - Victor S. Baidyshev
- Department of Computer Engineering and Automated Systems Software, Katanov Khakas State University, Pr. Lenin, 90, 655017 Abakan, Russia;
| | - Zakhar I. Popov
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics RAS, Kosygina 4, 119334 Moscow, Russia;
| | - Lucie Blahová
- Central European Institute of Technology CEITEC-BUT, Purkyňova 123, 61200 Brno, Czech Republic; (L.B.); (M.E.); (L.Z.)
| | - Marek Eliáš
- Central European Institute of Technology CEITEC-BUT, Purkyňova 123, 61200 Brno, Czech Republic; (L.B.); (M.E.); (L.Z.)
| | - Lenka Zajíčková
- Central European Institute of Technology CEITEC-BUT, Purkyňova 123, 61200 Brno, Czech Republic; (L.B.); (M.E.); (L.Z.)
- Department Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Anastasiya O. Solovieva
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
| |
Collapse
|
8
|
Kodama J, Harumningtyas AA, Ito T, Michlíček M, Sugimoto S, Kita H, Chijimatsu R, Ukon Y, Kushioka J, Okada R, Kamatani T, Hashimoto K, Tateiwa D, Tsukazaki H, Nakagawa S, Takenaka S, Makino T, Sakai Y, Nečas D, Zajíčková L, Hamaguchi S, Kaito T. Amine modification of calcium phosphate by low-pressure plasma for bone regeneration. Sci Rep 2021; 11:17870. [PMID: 34504247 PMCID: PMC8429709 DOI: 10.1038/s41598-021-97460-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 08/26/2021] [Indexed: 11/30/2022] Open
Abstract
Regeneration of large bone defects caused by trauma or tumor resection remains one of the biggest challenges in orthopedic surgery. Because of the limited availability of autograft material, the use of artificial bone is prevalent; however, the primary role of currently available artificial bone is restricted to acting as a bone graft extender owing to the lack of osteogenic ability. To explore whether surface modification might enhance artificial bone functionality, in this study we applied low-pressure plasma technology as next-generation surface treatment and processing strategy to chemically (amine) modify the surface of beta-tricalcium phosphate (β-TCP) artificial bone using a CH4/N2/He gas mixture. Plasma-treated β-TCP exhibited significantly enhanced hydrophilicity, facilitating the deep infiltration of cells into interconnected porous β-TCP. Additionally, cell adhesion and osteogenic differentiation on the plasma-treated artificial bone surfaces were also enhanced. Furthermore, in a rat calvarial defect model, the plasma treatment afforded high bone regeneration capacity. Together, these results suggest that amine modification of artificial bone by plasma technology can provide a high osteogenic ability and represents a promising strategy for resolving current clinical limitations regarding the use of artificial bone.
Collapse
Affiliation(s)
- Joe Kodama
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Anjar Anggraini Harumningtyas
- Center for Atomic and Molecular Technologies (CAMT), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Center for Accelerator Science and Technology, National Nuclear Energy Agency of Indonesia (BATAN), Jalan Babarsari Kotak Pos 6101 ykbb, Yogyakarta, 55281, Indonesia
| | - Tomoko Ito
- Center for Atomic and Molecular Technologies (CAMT), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Miroslav Michlíček
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlarska 2, 61137, Brno, Czech Republic
| | - Satoshi Sugimoto
- Center for Atomic and Molecular Technologies (CAMT), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hidekazu Kita
- Center for Atomic and Molecular Technologies (CAMT), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ryota Chijimatsu
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.,Bone and Cartilage Regenerative Medicine, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yuichiro Ukon
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Junichi Kushioka
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Rintaro Okada
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takashi Kamatani
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kunihiko Hashimoto
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Daisuke Tateiwa
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroyuki Tsukazaki
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shinichi Nakagawa
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Shota Takenaka
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Takahiro Makino
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yusuke Sakai
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - David Nečas
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkynova 123, Brno, 61200, Czech Republic
| | - Lenka Zajíčková
- CEITEC - Central European Institute of Technology, Brno University of Technology, Purkynova 123, Brno, 61200, Czech Republic.,Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlarska 2, Brno, 61137, Czech Republic
| | - Satoshi Hamaguchi
- Center for Atomic and Molecular Technologies (CAMT), Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Takashi Kaito
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| |
Collapse
|
9
|
Nemcakova I, Blahova L, Rysanek P, Blanquer A, Bacakova L, Zajíčková L. Behaviour of Vascular Smooth Muscle Cells on Amine Plasma-Coated Materials with Various Chemical Structures and Morphologies. Int J Mol Sci 2020; 21:E9467. [PMID: 33322781 PMCID: PMC7763571 DOI: 10.3390/ijms21249467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 11/16/2020] [Revised: 12/08/2020] [Accepted: 12/10/2020] [Indexed: 12/16/2022] Open
Abstract
Amine-coated biodegradable materials based on synthetic polymers have a great potential for tissue remodeling and regeneration because of their excellent processability and bioactivity. In the present study, we have investigated the influence of various chemical compositions of amine plasma polymer (PP) coatings and the influence of the substrate morphology, represented by polystyrene culture dishes and polycaprolactone nanofibers (PCL NFs), on the behavior of vascular smooth muscle cells (VSMCs). Although all amine-PP coatings improved the initial adhesion of VSMCs, 7-day long cultivation revealed a clear preference for the coating containing about 15 at.% of nitrogen (CPA-33). The CPA-33 coating demonstrated the ideal combination of good water stability, a sufficient amine group content, and favorable surface wettability and morphology. The nanostructured morphology of amine-PP-coated PCL NFs successfully slowed the proliferation rate of VSMCs, which is essential in preventing restenosis of vascular replacements in vivo. At the same time, CPA-33-coated PCL NFs supported the continuous proliferation of VSMCs during 7-day long cultivation, with no significant increase in cytokine secretion by RAW 264.7 macrophages. The CPA-33 coating deposited on biodegradable PCL NFs therefore seems to be a promising material for manufacturing small-diameter vascular grafts, which are still lacking on the current market.
Collapse
MESH Headings
- Amines/adverse effects
- Amines/chemistry
- Amines/immunology
- Amines/pharmacology
- Animals
- Cell Adhesion/drug effects
- Cell Adhesion/immunology
- Cell Proliferation/drug effects
- Cells, Cultured
- Coated Materials, Biocompatible/adverse effects
- Coated Materials, Biocompatible/chemistry
- Coated Materials, Biocompatible/pharmacology
- Macrophages/drug effects
- Macrophages/metabolism
- Mice
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/growth & development
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Nanofibers/adverse effects
- Nanofibers/chemistry
- Photoelectron Spectroscopy
- Plasma/chemistry
- Plasma/immunology
- Polyesters/chemistry
- Polymers/adverse effects
- Polymers/chemistry
- Polymers/pharmacology
- RAW 264.7 Cells
- Rats
- Surface Properties/drug effects
- Tissue Scaffolds/adverse effects
- Tissue Scaffolds/chemistry
Collapse
Affiliation(s)
- Ivana Nemcakova
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, v.v.i., Videnska 1083, 142 20 Prague 4, Czech Republic; (A.B.); (L.B.)
| | - Lucie Blahova
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (L.B.); (L.Z.)
| | - Petr Rysanek
- Department of Physics, Faculty of Science, University of J. E. Purkyne in Usti nad Labem, Pasteurova 15, 400 96 Usti nad Labem, Czech Republic;
| | - Andreu Blanquer
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, v.v.i., Videnska 1083, 142 20 Prague 4, Czech Republic; (A.B.); (L.B.)
| | - Lucie Bacakova
- Laboratory of Biomaterials and Tissue Engineering, Institute of Physiology of the Czech Academy of Sciences, v.v.i., Videnska 1083, 142 20 Prague 4, Czech Republic; (A.B.); (L.B.)
| | - Lenka Zajíčková
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic; (L.B.); (L.Z.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlarska 2, 611 37 Brno, Czech Republic
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkynova 123, 612 00 Brno, Czech Republic
| |
Collapse
|
10
|
Kupka V, Dvořáková E, Manakhov A, Michlíček M, Petruš J, Vojtová L, Zajíčková L. Well-Blended PCL/PEO Electrospun Nanofibers with Functional Properties Enhanced by Plasma Processing. Polymers (Basel) 2020; 12:polym12061403. [PMID: 32580496 PMCID: PMC7362260 DOI: 10.3390/polym12061403] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 05/04/2020] [Revised: 06/11/2020] [Accepted: 06/17/2020] [Indexed: 12/31/2022] Open
Abstract
Biodegradable composite nanofibers were electrospun from poly(ε-caprolactone) (PCL) and poly(ethylene oxide) (PEO) mixtures dissolved in acetic and formic acids. The variation of PCL:PEO concentration in the polymer blend, from 5:95 to 75:25, revealed the tunability of the hydrolytic stability and mechanical properties of the nanofibrous mats. The degradation rate of PCL/PEO nanofibers can be increased compared to pure PCL, and the mechanical properties can be improved compared to pure PEO. Although PCL and PEO have been previously reported as immiscible, the electrospinning into nanofibers having restricted dimensions (250–450 nm) led to a microscopically mixed PCL/PEO blend. However, the hydrolytic stability and tensile tests revealed the segregation of PCL into few-nanometers-thin fibrils in the PEO matrix of each nanofiber. A synergy phenomenon of increased stiffness appeared for the high concentration of PCL in PCL/PEO nanofibrous mats. The pure PCL and PEO mats had a Young’s modulus of about 12 MPa, but the mats made of high concentration PCL in PCL/PEO solution exhibited 2.5-fold higher values. The increase in the PEO content led to faster degradation of mats in water and up to a 20-fold decrease in the nanofibers’ ductility. The surface of the PCL/PEO nanofibers was functionalized by an amine plasma polymer thin film that is known to increase the hydrophilicity and attach proteins efficiently to the surface. The combination of different PCL/PEO blends and amine plasma polymer coating enabled us to tune the surface functionality, the hydrolytic stability, and the mechanical properties of biodegradable nanofibrous mats.
Collapse
Affiliation(s)
- Vojtěch Kupka
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
- Regional Centre of Advanced Technologies and Materials and Department of Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 17 Listopadu 12, 77900 Olomouc, Czech Republic
| | - Eva Dvořáková
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Anton Manakhov
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISiS”, Leninsky Prospect 4, 119049 Moscow, Russia
| | - Miroslav Michlíček
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Josef Petruš
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
- Institute of Materials Chemistry, Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, 61200 Brno, Czech Republic
| | - Lucy Vojtová
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
| | - Lenka Zajíčková
- Central European Institute of Technology—CEITEC, Brno University of Technology, Purkyňova 123, 61200 Brno, Czech Republic; (V.K.); (J.P.); (L.V.)
- Central European Institute of Technology—CEITEC, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic; (E.D.); (A.M.); (M.M.)
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
- Correspondence:
| |
Collapse
|
11
|
Černochová P, Blahová L, Medalová J, Nečas D, Michlíček M, Kaushik P, Přibyl J, Bartošíková J, Manakhov A, Bačáková L, Zajíčková L. Cell type specific adhesion to surfaces functionalised by amine plasma polymers. Sci Rep 2020; 10:9357. [PMID: 32518261 PMCID: PMC7283471 DOI: 10.1038/s41598-020-65889-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/07/2020] [Indexed: 01/08/2023] Open
Abstract
Our previously-obtained impressive results of highly increased C2C12 mouse myoblast adhesion to amine plasma polymers (PPs) motivated current detailed studies of cell resistance to trypsinization, cell proliferation, motility, and the rate of attachment carried out for fibroblasts (LF), keratinocytes (HaCaT), rat vascular smooth muscle cells (VSMC), and endothelial cells (HUVEC, HSVEC, and CPAE) on three different amine PPs. We demonstrated the striking difference in the resistance to trypsin treatment between endothelial and non-endothelial cells. The increased resistance observed for the non-endothelial cell types was accompanied by an increased rate of cellular attachment, even though spontaneous migration was comparable to the control, i.e., to the standard cultivation surface. As demonstrated on LF fibroblasts, the resistance to trypsin was similar in serum-supplemented and serum-free media, i.e., medium without cell adhesion-mediating proteins. The increased cell adhesion was also confirmed for LF cells by an independent technique, single-cell force spectroscopy. This method, as well as the cell attachment rate, proved the difference among the plasma polymers with different amounts of amine groups, but other investigated techniques could not reveal the differences in the cell behaviour on different amine PPs. Based on all the results, the increased resistance to trypsinization of C2C12, LF, HaCaT, and VSMC cells on amine PPs can be explained most probably by a non-specific cell adhesion such as electrostatic interaction between the cells and amine groups on the material surface, rather than by the receptor-mediated adhesion through serum-derived proteins adsorbed on the PPs.
Collapse
Affiliation(s)
- P Černochová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - L Blahová
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - J Medalová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - D Nečas
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic
| | - M Michlíček
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - P Kaushik
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - J Přibyl
- Core Facility Nanobiotechnology, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - J Bartošíková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - A Manakhov
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,Research Institute of Clinical and Experimental Lymphology- Branch of the ICG SB RAS, 2 Timakova str., 630060, Novosibirsk, Russian Federation
| | - L Bačáková
- Institute of Physiology of the Czech Academy of Sciences, Vídeňská 1083, Prague, 142 20, Czech Republic
| | - L Zajíčková
- RG Plasma Technologies, Central European Institute of Technology - CEITEC, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic. .,Central European Institute of Technology - CEITEC, Brno University of Technology, Purkyňova 123, Brno, 612 00, Czech Republic. .,Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic.
| |
Collapse
|
12
|
Miroshnichenko S, Timofeeva V, Permykova E, Ershov S, Kiryukhantsev-Korneev P, Dvořaková E, Shtansky DV, Zajíčková L, Solovieva A, Manakhov A. Plasma-Coated Polycaprolactone Nanofibers with Covalently Bonded Platelet-Rich Plasma Enhance Adhesion and Growth of Human Fibroblasts. Nanomaterials (Basel) 2019; 9:E637. [PMID: 31010178 PMCID: PMC6523319 DOI: 10.3390/nano9040637] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/11/2019] [Accepted: 04/15/2019] [Indexed: 12/12/2022]
Abstract
Biodegradable nanofibers are extensively employed in different areas of biology and medicine, particularly in tissue engineering. The electrospun polycaprolactone (PCL) nanofibers are attracting growing interest due to their good mechanical properties and a low-cost structure similar to the extracellular matrix. However, the unmodified PCL nanofibers exhibit an inert surface, hindering cell adhesion and negatively affecting their further fate. The employment of PCL nanofibrous scaffolds for wound healing requires a certain modification of the PCL surface. In this work, the morphology of PCL nanofibers is optimized by the careful tuning of electrospinning parameters. It is shown that the modification of the PCL nanofibers with the COOH plasma polymers and the subsequent binding of NH2 groups of protein molecules is a rather simple and technologically accessible procedure allowing the adhesion, early spreading, and growth of human fibroblasts to be boosted. The behavior of fibroblasts on the modified PCL surface was found to be very different when compared to the previously studied cultivation of mesenchymal stem cells on the PCL nanofibrous meshes. It is demonstrated by X-ray photoelectron spectroscopy (XPS) that the freeze-thawed platelet-rich plasma (PRP) immobilization can be performed via covalent and non-covalent bonding and that it does not affect biological activity. The covalently bound components of PRP considerably reduce the fibroblast apoptosis and increase the cell proliferation in comparison to the unmodified PCL nanofibers or the PCL nanofibers with non-covalent bonding of PRP. The reported research findings reveal the potential of PCL matrices for application in tissue engineering, while the plasma modification with COOH groups and their subsequent covalent binding with proteins expand this potential even further. The use of such matrices with covalently immobilized PRP for wound healing leads to prolonged biological activity of the immobilized molecules and protects these biomolecules from the aggressive media of the wound.
Collapse
Affiliation(s)
- Svetlana Miroshnichenko
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia.
- Institute of Biochemistry ⁻ subdivision of the FRC FTM, 2 Timakova str., 630117 Novosibirsk, Russia.
| | - Valeriia Timofeeva
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia.
| | - Elizaveta Permykova
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia.
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology "MISiS", Leninsky pr. 4, 119049 Moscow, Russia.
| | - Sergey Ershov
- Physics and Materials Science Research Unit, Laboratory for the Physics of Advanced Materials, University of Luxembourg, 162a, avenue de la Faïencerie, L-1511 Luxembourg, Luxembourg.
| | - Philip Kiryukhantsev-Korneev
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology "MISiS", Leninsky pr. 4, 119049 Moscow, Russia.
| | - Eva Dvořaková
- CEITEC-Central European Institute of Technology-Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic.
| | - Dmitry V Shtansky
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology "MISiS", Leninsky pr. 4, 119049 Moscow, Russia.
| | - Lenka Zajíčková
- CEITEC-Central European Institute of Technology-Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic.
| | - Anastasiya Solovieva
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia.
| | - Anton Manakhov
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia.
| |
Collapse
|
13
|
Nečas D, Klapetek P, Neu V, Havlíček M, Puttock R, Kazakova O, Hu X, Zajíčková L. Determination of tip transfer function for quantitative MFM using frequency domain filtering and least squares method. Sci Rep 2019; 9:3880. [PMID: 30846777 PMCID: PMC6405750 DOI: 10.1038/s41598-019-40477-x] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 02/11/2019] [Indexed: 11/09/2022] Open
Abstract
Magnetic force microscopy has unsurpassed capabilities in analysis of nanoscale and microscale magnetic samples and devices. Similar to other Scanning Probe Microscopy techniques, quantitative analysis remains a challenge. Despite large theoretical and practical progress in this area, present methods are seldom used due to their complexity and lack of systematic understanding of related uncertainties and recommended best practice. Use of the Tip Transfer Function (TTF) is a key concept in making Magnetic Force Microscopy measurements quantitative. We present a numerical study of several aspects of TTF reconstruction using multilayer samples with perpendicular magnetisation. We address the choice of numerical approach, impact of non-periodicity and windowing, suitable conventions for data normalisation and units, criteria for choice of regularisation parameter and experimental effects observed in real measurements. We present a simple regularisation parameter selection method based on TTF width and verify this approach via numerical experiments. Examples of TTF estimation are shown on both 2D and 3D experimental datasets. We give recommendations on best practices for robust TTF estimation, including the choice of windowing function, measurement strategy and dealing with experimental error sources. A method for synthetic MFM data generation, suitable for large scale numerical experiments is also presented.
Collapse
Affiliation(s)
- David Nečas
- Plasma Technologies, CEITEC, Masaryk University, Brno, 62500, Czech Republic.
| | - Petr Klapetek
- CEITEC, Brno University of Technology, Brno, 63800, Czech Republic.,Czech Metrology Institute, Brno, 63800, Czech Republic
| | | | - Marek Havlíček
- CEITEC, Brno University of Technology, Brno, 63800, Czech Republic.,Czech Metrology Institute, Brno, 63800, Czech Republic
| | - Robert Puttock
- National Physical Laboratory, Teddington, TW11 0LW, United Kingdom.,Physics Department, Royal Holloway University of London, Egham, TW20 0EX, United Kingdom
| | - Olga Kazakova
- National Physical Laboratory, Teddington, TW11 0LW, United Kingdom
| | - Xiukun Hu
- Physikalisch Technische Bundesanstalt, Braunschweig, 38116, Germany
| | - Lenka Zajíčková
- Plasma Technologies, CEITEC, Masaryk University, Brno, 62500, Czech Republic.,Department of Physical Electronics, Faculty of Science, Masaryk University, Brno, 61137, Czech Republic
| |
Collapse
|
14
|
Manakhov A, Fuková Š, Nečas D, Michlíček M, Ershov S, Eliaš M, Visotin M, Popov Z, Zajíčková L. Analysis of epoxy functionalized layers synthesized by plasma polymerization of allyl glycidyl ether. Phys Chem Chem Phys 2018; 20:20070-20077. [DOI: 10.1039/c8cp01452c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The deposition of epoxide groups by plasma polymerization opens new horizons for robust and quick immobilization of biomolecules on any type of substrate.
Collapse
Affiliation(s)
- Anton Manakhov
- National University of Science and Technology “MISiS”
- Leninsky pr. 4
- Moscow 119049
- Russia
| | - Šárka Fuková
- RG Plasma Technologies
- CEITEC – Central European Institute of Technology
- Masaryk University
- Purkyňova 123
- Brno 61200
| | - David Nečas
- RG Plasma Technologies
- CEITEC – Central European Institute of Technology
- Masaryk University
- Purkyňova 123
- Brno 61200
| | - Miroslav Michlíček
- RG Plasma Technologies
- CEITEC – Central European Institute of Technology
- Masaryk University
- Purkyňova 123
- Brno 61200
| | - Sergey Ershov
- Materials Research and Technology Department
- Luxembourg Institute of Science and Technology
- 5 avenue des Hauts-Fourneaux
- Esch-sur-Alzette
- Luxembourg
| | - Marek Eliaš
- RG Plasma Technologies
- CEITEC – Central European Institute of Technology
- Masaryk University
- Purkyňova 123
- Brno 61200
| | - Maxim Visotin
- Siberian Federal University
- 79 Svobodny av
- Krasnoyarsk
- Russian Federation
- Federal Research Center KSC SB RAS
| | - Zakhar Popov
- National University of Science and Technology “MISiS”
- Leninsky pr. 4
- Moscow 119049
- Russia
| | - Lenka Zajíčková
- RG Plasma Technologies
- CEITEC – Central European Institute of Technology
- Masaryk University
- Purkyňova 123
- Brno 61200
| |
Collapse
|
15
|
Solovieva A, Miroshnichenko S, Kovalskii A, Permyakova E, Popov Z, Dvořáková E, Kiryukhantsev-Korneev P, Obrosov A, Polčak J, Zajíčková L, Shtansky DV, Manakhov A. Immobilization of Platelet-Rich Plasma onto COOH Plasma-Coated PCL Nanofibers Boost Viability and Proliferation of Human Mesenchymal Stem Cells. Polymers (Basel) 2017; 9:E736. [PMID: 30966035 PMCID: PMC6418517 DOI: 10.3390/polym9120736] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [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: 11/09/2017] [Revised: 12/06/2017] [Accepted: 12/18/2017] [Indexed: 12/11/2022] Open
Abstract
The scaffolds made of polycaprolactone (PCL) are actively employed in different areas of biology and medicine, especially in tissue engineering. However, the usage of unmodified PCL is significantly restricted by the hydrophobicity of its surface, due to the fact that its inert surface hinders the adhesion of cells and the cell interactions on PCL surface. In this work, the surface of PCL nanofibers is modified by Ar/CO₂/C₂H₄ plasma depositing active COOH groups in the amount of 0.57 at % that were later used for the immobilization of platelet-rich plasma (PRP). The modification of PCL nanofibers significantly enhances the viability and proliferation (by hundred times) of human mesenchymal stem cells, and decreases apoptotic cell death to a normal level. According to X-ray photoelectron spectroscopy (XPS), after immobilization of PRP, up to 10.7 at % of nitrogen was incorporated into the nanofibers surface confirming the grafting of proteins. Active proliferation and sustaining the cell viability on nanofibers with immobilized PRP led to an average number of cells of 258 ± 12.9 and 364 ± 34.5 for nanofibers with ionic and covalent bonding of PRP, respectively. Hence, our new method for the modification of PCL nanofibers with PRP opens new possibilities for its application in tissue engineering.
Collapse
Affiliation(s)
- Anastasiya Solovieva
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia; (A.S.); (S.M.)
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| | - Svetlana Miroshnichenko
- Scientific Institute of Clinical and Experimental Lymphology-Branch of the ICG SB RAS, 2 Timakova str., 630060 Novosibirsk, Russia; (A.S.); (S.M.)
- Research Institute of Biochemistry, 2 Timakova str., 630117 Novosibirsk, Russia
| | - Andrey Kovalskii
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| | - Elizaveta Permyakova
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| | - Zakhar Popov
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| | - Eva Dvořáková
- RG Plasma Technologies, CEITEC–Central European Institute of Technology, Masaryk University, Purkyňova 123, 61200 Brno, Czech Republic; (E.D.); (L.Z.)
| | - Philip Kiryukhantsev-Korneev
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| | - Aleksei Obrosov
- Chair of Physical Metallurgy and Materials Technology, Brandenburg Technical University, 03046 Cottbus, Germany;
| | - Josef Polčak
- CEITEC-Central European Institute of Technology, Brno University of Technology, Technická 3058/10, 61600 Brno, Czech Republic;
- Institute of Physical Engineering, Brno University of Technology, Technicka 2896/2, 616 69 Brno, Czech Republic
| | - Lenka Zajíčková
- RG Plasma Technologies, CEITEC–Central European Institute of Technology, Masaryk University, Purkyňova 123, 61200 Brno, Czech Republic; (E.D.); (L.Z.)
| | - Dmitry V. Shtansky
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| | - Anton Manakhov
- National University of Science and Technology “MISiS”, Leninsky pr. 4, 119049 Moscow, Russia; (A.K.); (E.P.); (Z.P.); (P.K.-K.), (D.V.S.)
| |
Collapse
|
16
|
Bannov AG, Prášek J, Jašek O, Zajíčková L. Investigation of Pristine Graphite Oxide as Room-Temperature Chemiresistive Ammonia Gas Sensing Material. Sensors (Basel) 2017; 17:s17020320. [PMID: 28208762 PMCID: PMC5336062 DOI: 10.3390/s17020320] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [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: 12/26/2016] [Revised: 02/02/2017] [Accepted: 02/06/2017] [Indexed: 11/16/2022]
Abstract
Graphite oxide has been investigated as a possible room-temperature chemiresistive sensor of ammonia in a gas phase. Graphite oxide was synthesized from high purity graphite using the modified Hummers method. The graphite oxide sample was investigated using scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, thermogravimetry and differential scanning calorimetry. Sensing properties were tested in a wide range of ammonia concentrations in air (10-1000 ppm) and under different relative humidity levels (3%-65%). It was concluded that the graphite oxide-based sensor possessed a good response to NH₃ in dry synthetic air (ΔR/R₀ ranged from 2.5% to 7.4% for concentrations of 100-500 ppm and 3% relative humidity) with negligible cross-sensitivity towards H₂ and CH₄. It was determined that the sensor recovery rate was improved with ammonia concentration growth. Increasing the ambient relative humidity led to an increase of the sensor response. The highest response of 22.2% for 100 ppm of ammonia was achieved at a 65% relative humidity level.
Collapse
Affiliation(s)
- Alexander G Bannov
- Department of Chemistry and Chemical Technology, Novosibirsk State Technical University, K. Marx 20, RU-630073 Novosibirsk, Russia.
| | - Jan Prášek
- SIX Research Centre, Brno University of Technology, Technická 10, CZ-61600 Brno, Czech Republic.
| | - Ondřej Jašek
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, Czech Republic.
| | - Lenka Zajíčková
- Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, Czech Republic.
- RG Plasma Technologies, CEITEC-Central European Institute of Technology, Masaryk University, Purkyňova 123, CZ-61200 Brno, Czech Republic.
| |
Collapse
|
17
|
Ghosal K, Manakhov A, Zajíčková L, Thomas S. Structural and Surface Compatibility Study of Modified Electrospun Poly(ε-caprolactone) (PCL) Composites for Skin Tissue Engineering. AAPS PharmSciTech 2017; 18:72-81. [PMID: 26883261 DOI: 10.1208/s12249-016-0500-8] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 02/04/2016] [Indexed: 11/30/2022] Open
Abstract
In this study, biodegradable poly(ε-caprolactone) (PCL) nanofibers (PCL-NF), collagen-coated PCL nanofibers (Col-c-PCL), and titanium dioxide-incorporated PCL (TiO2-i-PCL) nanofibers were prepared by electrospinning technique to study the surface and structural compatibility of these scaffolds for skin tisuue engineering. Collagen coating over the PCL nanofibers was done by electrospinning process. Morphology of PCL nanofibers in electrospinning was investigated at different voltages and at different concentrations of PCL. The morphology, interaction between different materials, surface property, and presence of TiO2 were studied by scanning electron microscopy (SEM), Fourier transform IR spectroscopy (FTIR), contact angle measurement, energy dispersion X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). MTT assay and cell adhesion study were done to check biocompatibilty of these scaffolds. SEM study confirmed the formation of nanofibers without beads. FTIR proved presence of collagen on PCL scaffold, and contact angle study showed increment of hydrophilicity of Col-c-PCL and TiO2-i-PCL due to collagen coating and incorporation of TiO2, respectively. EDX and XPS studies revealed distribution of entrapped TiO2 at molecular level. MTT assay and cell adhesion study using L929 fibroblast cell line proved viability of cells with attachment of fibroblasts over the scaffold. Thus, in a nutshell, we can conclude from the outcomes of our investigational works that such composite can be considered as a tissue engineered construct for skin wound healing.
Collapse
|
18
|
Sobota A, Guaitella O, Sretenović GB, Krstić IB, Kovačević VV, Obrusník A, Nguyen YN, Zajíčková L, Obradović BM, Kuraica MM. Electric field measurements in a kHz-driven He jet—the influence of the gas flow speed. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/0963-0252/25/6/065026] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
19
|
|
20
|
Majzlíková P, Sedláček J, Prášek J, Pekárek J, Svatoš V, Bannov AG, Jašek O, Synek P, Eliáš M, Zajíčková L, Hubálek J. Sensing properties of multiwalled carbon nanotubes grown in MW plasma torch: electronic and electrochemical behavior, gas sensing, field emission, IR absorption. Sensors (Basel) 2015; 15:2644-61. [PMID: 25629702 PMCID: PMC4367325 DOI: 10.3390/s150202644] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 01/16/2015] [Indexed: 01/30/2023]
Abstract
Vertically aligned multi-walled carbon nanotubes (VA-MWCNTs) with an average diameter below 80 nm and a thickness of the uniform VA-MWCNT layer of about 16 μm were grown in microwave plasma torch and tested for selected functional properties. IR absorption important for a construction of bolometers was studied by Fourier transform infrared spectroscopy. Basic electrochemical characterization was performed by cyclic voltammetry. Comparing the obtained results with the standard or MWCNT‐modified screen-printed electrodes, the prepared VA-MWCNT electrodes indicated their high potential for the construction of electrochemical sensors. Resistive CNT gas sensor revealed a good sensitivity to ammonia taking into account room temperature operation. Field emission detected from CNTs was suitable for the pressure sensing application based on the measurement of emission current in the diode structure with bending diaphragm. The advantages of microwave plasma torch growth of CNTs, i.e., fast processing and versatility of the process, can be therefore fully exploited for the integration of surface-bound grown CNTs into various sensing structures.
Collapse
Affiliation(s)
- Petra Majzlíková
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Jiří Sedláček
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Jan Prášek
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Jan Pekárek
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Vojtěch Svatoš
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Alexander G Bannov
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Ondřej Jašek
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Petr Synek
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Marek Eliáš
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Lenka Zajíčková
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Jaromír Hubálek
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| |
Collapse
|
21
|
Zajíčková L, Jašek O, Eliáš M, Synek P, Lazar L, Schneeweiss O, Hanzlíková R. Synthesis of carbon nanotubes by plasma-enhanced chemical vapor deposition in an atmospheric-pressure microwave torch. PURE APPL CHEM 2010. [DOI: 10.1351/pac-con-09-09-38] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
There are many different techniques for the synthesis of carbon nanotubes (CNTs), and plasma technologies experience a significant competitor in thermal chemical vapor deposition (CVD) processes. A particular process is, therefore, selected according to the specific requirements of an application, which clearly differ for the development of composites as compared to nanoelectronics, field emission, displays, sensors, and the like. This paper discusses the method for the synthesis of CNTs using an atmospheric-pressure microwave (MW) torch. It was successfully applied in the fast deposition of multiwalled nanotubes (MWNTs) on a substrate without the necessity of any vacuum or heating equipment. Dense straight-standing nanotubes were prepared on Si substrates with and also without barrier SiOx layer. Therefore, it was possible to produce CNTs directly on conductive Si and to use them as an electron-emitting electrode of the gas pressure sensor. The CNTs grown in MW torch were also used to create a gas sensor based on the changes of electrical resistance measured between two planar electrodes connected by the CNTs.
Collapse
Affiliation(s)
- Lenka Zajíčková
- 1Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Ondrej Jašek
- 1Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Marek Eliáš
- 1Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Petr Synek
- 1Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Lukáš Lazar
- 1Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Oldřich Schneeweiss
- 2Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic
| | - Renáta Hanzlíková
- 3Institute of Scientific Instruments, Academy of Sciences of the Czech Republic, Královopolská 147, 612 64 Brno, Czech Republic
| |
Collapse
|
22
|
Jašek O, Eliáš M, Zajíčková L, Kudrle V, Bublan M, Matějková J, Rek A, Buršík J, Kadlečíková M. Carbon nanotubes synthesis in microwave plasma torch at atmospheric pressure. Materials Science and Engineering: C 2006. [DOI: 10.1016/j.msec.2005.09.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
23
|
Franclová J, Kučerová Z, Buršíková V, Zajíčková L, Peřina V. Structural changes of plasma deposited SiOxCyHz thin films attained by thermal annealing. ACTA ACUST UNITED AC 2004. [DOI: 10.1007/bf03166497] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|