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Duarte ECS, Presotto A, Okimoto D, Souto VS, Sardella E, Zadorosny R. Use of thermal gradients for control of vortex matter in mesoscopic superconductors. J Phys Condens Matter 2019; 31:405901. [PMID: 31247610 DOI: 10.1088/1361-648x/ab2d70] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Usually, the measurements of electronic and magnetic properties of superconducting samples are carried out under a constant temperature bath. On the other hand, thermal gradients induce local variation of the superconducting order parameter, and the vortex dynamics can present interesting behaviors. In this work, we solved the time-dependent Ginzburg-Landau equations simulating samples under two different thermal gradients, and considering two values of the Ginzburg-Landau parameter, [Formula: see text]. We find that both parameters, i.e. [Formula: see text] and thermal gradients, play an important role on the vortex dynamics and on the magnetization behavior of the samples.
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Affiliation(s)
- E C S Duarte
- Departamento de Física e Química, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista (UNESP), Caixa Postal 31, 15385-000 Ilha Solteira-SP, Brazil
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Duarte ECS, Sardella E, Ortiz WA, Zadorosny R. Dynamics and heat diffusion of Abrikosov's vortex-antivortex pairs during an annihilation process. J Phys Condens Matter 2017; 29:405605. [PMID: 28741599 DOI: 10.1088/1361-648x/aa81e6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The manipulation and control of vortex states in superconducting systems are of great interest in view of possible applications, for which mesoscopic materials are good candidates. In this work, we studied the annihilation dynamics and the dissipative aspects of an Abrikosov's vortex-antivortex pair in a mesoscopic superconducting system with a concentric hole. The generalized time-dependent Ginzburg-Landau equations were numerically solved. The main result is the appearance of a phase slip-like line due to the elongation of the vortex and antivortex cores. Under specific circumstances, thermal dissipation might be associated with a sizeable relaxation of the order parameter, so that the energy released in the annihilation of a vortex-antivortex pair might become detectable in measurements of the magnetization as a function of time.
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Affiliation(s)
- E C S Duarte
- Departamento de Física e Química, Universidade Estadual Paulista (UNESP), Faculdade de Engenharia de Ilha Solteira, Caixa Postal 31, 15385-000 Ilha Solteira-SP, Brazil
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Sardella E, Liuzzi F, Comparelli R, Depalo N, Striccoli M, Agostiano A, Favia P, Curri ML. Functionalized luminescent nanocrystals on patterned surfaces obtained by radio frequency glow discharges. Nanotechnology 2013; 24:145302. [PMID: 23507981 DOI: 10.1088/0957-4484/24/14/145302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this work a genuine combination of a bottom-up approach, which is based on synthesis and functionalization of emitting nanocrystals (NCs), with a top-down strategy, which relies on a flexible and versatile cold plasma process, is shown. Luminescent semiconducting colloidal NCs consisting of a CdSe core coated with a ZnS shell (CdSe@ZnS) are directly assembled onto micro-patterned substrates previously functionalized by means of glow discharges performed through physical masks. The NC assembly is driven by electrostatic interactions that led to their successful organization into spatially resolved domains. Two distinct protocols are tested, the former using a plasma deposition process combined with an electrostatic layer-by-layer procedure, the latter based on a two-step plasma deposition/treatment process. The procedures are thoroughly monitored with fluorescence microscopy, atomic force microscopy, x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy and scanning electron microscopy. The two-step plasma protocol is demonstrated to be more efficient in directing a uniform and specific assembly of luminescent NCs with respect to the hybrid procedure. The presented 'mix and match' approach offers great potential for integrating NCs, with their unique size-dependent properties, into microstructures, providing a universal platform for the fabrication of sensors, biochips, displays and switches.
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Affiliation(s)
- E Sardella
- CNR-IMIP (UOS Bari) c/o Dipartimento di Chimica, Università degli Studi di Bari, via Orabona 4, I-70126 Bari, Italy.
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Gristina R, Nardulli M, Sardella E, Intranuovo F, Salama R, Pignatelli D, Pistillo B, Dilecce G, D'Agostino R, Favia P. Remote and Direct Plasma Processing of Cells: How to Induce a Desired Behavior. Plasma Med 2012. [DOI: 10.1615/plasmamed.2013006350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Favia P, Sardella E, Lopez LC, Laera S, Milella A, Pistillo B, Intranuovo F, Nardulli M, Gristina R, D’Agostino R. Plasma Assisted Surface Modification Processes for Biomedical Materials and Devices. Plasma Assisted Decontamination of Biological and Chemical Agents 2011. [DOI: 10.1007/978-1-4020-8439-3_18] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Mourtas S, Kastellorizios M, Klepetsanis P, Farsari E, Amanatides E, Mataras D, Pistillo B, Favia P, Sardella E, d’Agostino R, Antimisiaris S. Covalent immobilization of liposomes on plasma functionalized metallic surfaces. Colloids Surf B Biointerfaces 2011; 84:214-20. [DOI: 10.1016/j.colsurfb.2011.01.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Accepted: 01/04/2011] [Indexed: 10/18/2022]
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Raucci M, D’Antò V, Guarino V, Sardella E, Zeppetelli S, Favia P, Ambrosio L. Biomineralized porous composite scaffolds prepared by chemical synthesis for bone tissue regeneration. Acta Biomater 2010; 6:4090-9. [PMID: 20417736 DOI: 10.1016/j.actbio.2010.04.018] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 04/16/2010] [Accepted: 04/20/2010] [Indexed: 10/19/2022]
Abstract
Scaffold design is a key factor in the clinical success of bone tissue engineering grafts. To date, no existing single biomaterial used in bone repair and regeneration fulfils all the requirements for an ideal bone graft. In this study hydroxyapatite/polycaprolactone (HA/PCL) composite scaffolds were prepared by a wet chemical method at room temperature. The physico-chemical properties of the composite materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, while scaffold morphology was investigated by scanning electron microscopy (SEM) with energy-dispersive spectroscopy to validate the process used for synthesis. Finally, the response of bone marrow-derived human mesenchymal stem cells (hMSCs) in terms of cell proliferation and differentiation to the osteoblastic phenotype was evaluated using the Alamar blue assay, SEM and alkaline phosphatase activity. Microstructural analysis indicated that the HA particles were distributed homogeneously within the PCL matrix. The biological results revealed that the HA/PCL composite scaffolds are suitable for the proliferation and differentiation of MSCs in vitro, supporting osteogenesis after 15 days. All the results indicate that these scaffolds meet the requirements of materials for bone tissue engineering and could be used for many clinical applications in orthopaedic and maxillofacial surgery.
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Ingrosso C, Sardella E, Keller S, Dohn S, Striccoli M, Agostiano A, Boisen A, Curri ML. Surface functionalization of epoxy-resist- based microcantilevers with iron oxide nanocrystals. Adv Mater 2010; 22:3288-3292. [PMID: 20518035 DOI: 10.1002/adma.200904013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- C Ingrosso
- Dipartimento di Chimica, Università di Bari, Italy
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Ingrosso C, Striccoli M, Agostiano A, Sardella E, Keller S, Blagoi G, Boisen A, Curri M. Surface Functionalization of Micro Mechanical Cantilever Sensors by Organic Capped TiO2 and Fe2O3 Nanocrystals. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Buttiglione M, Vitiello F, Sardella E, Petrone L, Nardulli M, Favia P, d'Agostino R, Gristina R. Behaviour of SH-SY5Y neuroblastoma cell line grown in different media and on different chemically modified substrates. Biomaterials 2007; 28:2932-45. [PMID: 17391751 DOI: 10.1016/j.biomaterials.2007.02.022] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2006] [Accepted: 02/16/2007] [Indexed: 11/28/2022]
Abstract
Among the parameters that can be tested in experiments on neuronal cell culture the use of different culture media and substrates represents a powerful assay to influence cell adhesion and differentiation. In this work, plasma-enhanced-chemical vapour depositions (PE-CVD) from acrylic acid and allylamine vapours have been performed to deposit coatings bearing oxygen (O)- and nitrogen (N)-containing functional groups on polyethylenetherephtalate (PET) surface. Human neuroblastoma SH-SY5Y cells were grown on plasma modified substrates and in presence of media containing different amount of fetal calf serum (FCS) or in serum-free medium containing cAMP. Our results showed that N-containing substrates improved cell adhesion, while the neurites sprouting was influenced by cell culture media. Interestingly, the presence of carboxylic groups on the modified surface can influence the expression of a differentiation marker, neurofilament-200 (NF-H), in cells grown in serum-containing media.
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Affiliation(s)
- M Buttiglione
- Department of Pharmacology and Human Physiology, University of Bari, Piazza Giulio Cesare-Policlinico, 70124 Bari, Italy.
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Sardella E. Interaction potential between vortex lines for uniaxial superconductors in the London approximation. Phys Rev B Condens Matter 1996; 53:14506-14512. [PMID: 9983249 DOI: 10.1103/physrevb.53.14506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sardella E, Moore MA. Tilt-wave instability of the flux-line lattice in anisotropic superconductors. Phys Rev B Condens Matter 1993; 48:9664-9668. [PMID: 10007212 DOI: 10.1103/physrevb.48.9664] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sardella E. Elastic energy of the Abrikosov flux-line lattice for anisotropic superconductors: Low inductions. Phys Rev B Condens Matter 1992; 45:3141-3144. [PMID: 10001874 DOI: 10.1103/physrevb.45.3141] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sardella E. Theory of elasticity of the Abrikosov flux-line lattice for uniaxial superconductors: Parallel flux lines. Phys Rev B Condens Matter 1991; 44:5209-5215. [PMID: 9998330 DOI: 10.1103/physrevb.44.5209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sardella E. Phenomenological application of the projection-operator method and its connection with critical dynamics. Phys Rev B Condens Matter 1991; 43:3613-3616. [PMID: 9997677 DOI: 10.1103/physrevb.43.3613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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