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115 results on '"Perero, Sergio"'

11. W/Fe CO-SPUTTERED LAYERS FOR TUNGSTEN TO STEEL JOINTS

Author

Casalegno, Valentina, primary, Perero, Sergio, additional, Girman, Vladimír, additional, Sedlák, Richard, additional, Scarpellini, Alice, additional, Dorow-Gerspach, Daniel, additional, Heuer, Simon, additional, and Ferraris, Monica, additional

Published
2023
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18. List of Contributors

Author

Bongiovanni, Roberta, primary, Bordado, J.C., additional, Buonomenna, M.G., additional, Cappelletti, Giuseppe, additional, De Graeve, I., additional, Duarte, A.P., additional, Fermo, Paola, additional, Ferraris, Sara, additional, Filipovic, Nenad, additional, Lamaka, Sviatlana V., additional, Leng, Jinsong, additional, Liang, Jie, additional, Liu, Liwu, additional, Liu, Yanju, additional, Lutz, A., additional, Lv, Xiongfei, additional, Mahltig, Boris, additional, Małgorzata, Muzyczek, additional, Mol, J.M.C., additional, Montemor, M. Fatima, additional, Montemor, M.F., additional, Nikkola, Juha, additional, Perero, Sergio, additional, Ren, Xuehong, additional, Románszki, L., additional, Ryszard, Kozlowski, additional, Snihirova, Darya, additional, Telegdi, J., additional, Terryn, H., additional, Trif, L., additional, Vitale, Alessandra, additional, and Zhang, Fenghua, additional

Published
2016
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24. Silver Nanocluster/Silica Composite Coatings Obtained by Sputtering for Antibacterial Applications

Author

Balagna, Cristina, primary, Ferraris, Sara, additional, Perero, Sergio, additional, Miola, Marta, additional, Baino, Francesco, additional, Coggiola, Andrea, additional, Dolcino, Daniela, additional, Battiato, Alfio, additional, Manfredotti, Chiara, additional, Vittone, Ettore, additional, Vernè, Enrica, additional, and Ferraris, Monica, additional

Published
2013
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27. Microwave resonances in nanogranular [([Fe.sub.0.7][Co.sub.0.3]).sub.71][B.sub.22][Ni.sub.7] films

Author

Pasquale, Massimo, Perero, Sergio, Bertotti, Giorgio, Kabos, Pavel, and Lim, Sang Ho

Subjects
Anisotropy -- Research, Anisotropy -- Magnetic properties, Electromagnetism -- Research, Dielectric films -- Research, Thin films -- Research, Business, Electronics, Electronics and electrical industries
Abstract

We have analyzed the microwave behavior of soft nanogranular [([Fe.sub.0.7] [Co.sub.0.3]).sub.71]B.sub.22][Ni.sub.7] films which present a de permeability from 60 to 280, a resistivity of 8 to 9 [10.sup.-7] [OMEGA] m and a zero-field double ferromagnetic resonance peak at frequencies ranging from 3.8 to 8.35 GHz. The high frequency and large line-width of the observed resonances allows for possible applications in microwave absorbers in a frequency range extending from 6 to 10 GHz. Index Terms--Anisotropy, FeCo films, ferromagnetic resonance, magnetic thin films, microwave properties, nanogranular films.

Published
2006

28. Microwave properties and anisotropy field distribution in nanogranular Fe-Co-Al-O films

Author

Pasquale, Massimo, Coisson, Marco, Perero, Sergio, and Lim, Sang Ho

Subjects
Anisotropy -- Research, Anisotropy -- Magnetic properties, Ferromagnetism -- Research, Electromagnetism -- Research, Dielectric films -- Research, Dielectric films -- Magnetic properties, Thin films -- Research, Thin films -- Magnetic properties, Business, Electronics, Electronics and electrical industries
Abstract

We have investigated the microwave properties of a set of Co-Fe-Al-O films with different thicknesses. The films show a well-defined in-plane anisotropy due to the bias field applied during deposition. The resonance frequency is determined through the scattering parameters measured with a vector network analyzer and a probing station connected to a coplanar waveguide. The results show that the resonance peak features depend on the direction of the applied/RF field and on the applied field history. Index Terms--Anisotropy, FeCo films, ferromagnetic resonance, magnetic thin films, microwave properties, nanogranular films.

Published
2005

31. Biocompatibility versus peritoneal mesothelial cells of polypropylene prostheses for hernia repair, coated with a thin silica/silver layer

Author

Muzio, Giuliana, Perero, Sergio, Miola, Marta, Oraldi, Manuela, Ferraris, Sara, Verne', Enrica, Festa, Federico, Canuto, Rosa Angela, Festa, Valentino, and Ferraris, Monica

Subjects
Male, Hernia, Silver, Human mesothelial cells, Biomedical Engineering, Surgical Mesh, Polypropylenes, Silicon Dioxide, Epithelium, Biomaterials, Coated Materials, Biocompatible, Implants, Experimental, Silica/silver, Materials Testing, Humans, Cytokines, Female, Antibacterial activity, Peritoneum, Polypropylene prosthesis, Cells, Cultured, Herniorrhaphy
Abstract

Hernias are generally repaired using synthetic prostheses. Infection may already be present or develop during implantation. Based on the increasing resistance to antibiotics, and the well-known antimicrobial properties of silver (Ag), the possibility of coating hernia prostheses with a nanostructured layer containing Ag was explored. Prostheses (Clear Mesh Composite [CMC]) made up of two polypropylene layers (macroporous light mesh and thin transparent film) were tested with human mesothelial cells from omentum biopsies. Mesotheliocytes modulate abdominal wall healing producing cytokines, growth factors, and adhesion molecules. Evaluating the growth of these cells on CMC or film alone showed that cell numbers on CMC increased over time, and were higher than those on film alone. Vimentin immunostaining confirmed the cells to be mesotheliocytes. Subsequently, the biocompatibility of mesh layer, coated or not with a thin layer of Ag/SiO

Published
2017

32. Structure, ferromagnetic resonance, and permeability of nanogranular Fe-Co-B-Ni films

Author

Celegato, Federica, Coisson, Marco, Magni, Alessandro, and Perero, Sergio

Subjects
Iron compounds -- Structure, Iron compounds -- Magnetic properties, Nickel compounds -- Structure, Nickel compounds -- Magnetic properties, Ferromagnetism -- Analysis, Physics
Abstract

The characterization and analysis of the static and microwave magnetic properties of ([Fe.sub.0.7][Co.sub.0.3]71B22Ni7 nongranular ferromagnetic films are performed. The combination of the reasonable values of permeability and high ferromagnetic resistance frequency makes these nanogranular materials useful in the development of inductive microwave components.

Published
2006

35. Antibacterial and Bioactive Coatings Based on Radio Frequency Co-Sputtering of Silver Nanocluster-Silica Coatings on PEEK/Bioactive Glass Layers Obtained by Electrophoretic Deposition

Author

Ur Rehman, Muhammad Atiq, primary, Ferraris, Sara, additional, Goldmann, Wolfgang H., additional, Perero, Sergio, additional, Bastan, Fatih Erdem, additional, Nawaz, Qaisar, additional, Confiengo, G. Gautier di, additional, Ferraris, Monica, additional, and Boccaccini, Aldo R., additional

Published
2017
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39. Structure, ferromagnetic resonance, and permeability of nanogranular Fe–Co–B–Ni films.

Author

Pasquale, Massimo, Celegato, Federica, Coisson, Marco, Magni, Alessandro, Perero, Sergio, Kabos, Pavel, Teppati, Valeria, Suk Hee Han, Jongryoul Kim, and Sang Ho Lim

Subjects
THIN films, FERROMAGNETIC resonance, MAGNETIC resonance, MAGNETIC force microscopy, MAGNETIC films
Abstract

The static and microwave magnetic properties of soft nanogranular (Fe0.7Co0.3)71B22Ni films with a 2 T saturation magnetization are presented as functions of thickness, ranging from 136 to 235 nm. Microwave permeability values from 60 to 260 are measured and ferromagnetic resonance frequencies up to 6.8 GHz are found using a vector network analyzer, connected to coplanar/microstrip structures loaded with the ferromagnetic films. Topographic and magnetic structures down to 20–40 nm were observed by atomic/magnetic force microscopy. The combination of reasonable values of the permeability and high ferromagnetic resonance frequency makes these nanogranular materials useful in the development of inductive microwave components. [ABSTRACT FROM AUTHOR]

Published
2006
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50. Antibacterial Nanocoatings for Ocular Applications

Author

Baino, Francesco, Perero, Sergio, Miola, Marta, and Ferraris, Monica

Abstract

Bacterial issues in ophthalmic applications, with particular reference to postoperative infection of ocular implants, cause significant problems that often require additional, stressful and expensive treatments for the patients. In this work we applied silver-containing antibacterial costings on two kinds of polymeric ocular devices, i.e. silicone scleral buckles for retinal detachment surgery and poly(methyl methacrylate) artificial eyes for enucleated patients. The coatings (thickness around 50 nm), constituted by silver nanoclusters embedded in a silica matrix, were produced by RF co-sputtering and investigated by SEM and EDS. The antibacterial effect of the coating was confirmed by the in vitro formation of an inhibition halo against Staphylococcus aureus, which is one of the most common pathogens involved in ocular infections. The approach proposed in this study for treating implant-related ocular infections can have a significant impact in the field of ophthalmic biomaterials, suggesting a valuable alternative to the administration of antibiotics that may become ineffective towards resistant bacterial strains.

Published
2006
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