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Alcaide AM, Regodon G, Ferrer FJ, Rico V, Alvarez R, Rojas TC, González-Elipe AR, Palmero A. Low temperature nucleation of thermochromic VO 2crystal domains in nanocolumnar porous thin films. Nanotechnology 2023; 34:255702. [PMID: 36947879 DOI: 10.1088/1361-6528/acc664] [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: 02/13/2023] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
The low temperature formation of monoclinic VO2crystal domains in nanocolumnar vanadium/oxygen thin films prepared by magnetron sputtering at oblique angles is analyzed. The synthesis procedure involved the deposition of amorphous nanocolumnar VO1.9thin films at room temperature and its subsequent annealing at temperatures between 250 °C and 330 °C in an oxygen atmosphere. The thermochromic transition of these films was found at a temperature of 47 °C when the annealing temperature was 270 °C and 58 °C when the annealing temperature was 280 °C and 290 °C, presenting a clear drop of the optical transmittance in the infrared region of the spectrum. The significant downshift in the temperature window to obtain VO2in comparison with compact films and other strategies in literature is explained by the particular morphology of the nanocolumnar structures, which contains numerous defects along with open and embedded porosity.
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Affiliation(s)
- A M Alcaide
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
| | - G Regodon
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
| | - F J Ferrer
- Centro Nacional de Aceleradores, CSIC-Universidad de Sevilla, Seville, Spain
- Departamento de FAMN, Universidad de Sevilla, Aptdo 1065, E-41012 Seville, Spain
| | - V Rico
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
| | - R Alvarez
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
- Departamento de Física Aplicada I, Escuela Politécnica Superior, Universidad de Sevilla, c/Virgen de África 7, E-41011 Seville, Spain
| | - T C Rojas
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
| | - A R González-Elipe
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
| | - A Palmero
- Instituto de Ciencia de Materiales de Sevilla (CSIC- Universidad de Sevilla), Américo Vespucio 49, E-41092 Seville, Spain
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Popovic M, Rico V, DeAngelis C, Lam H, Lim FMY. Online Psychological Intervention in Breast Cancer Survivors: a Review. Hong Kong Journal of Radiology 2022. [DOI: 10.12809/hkjr2217206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- M Popovic
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - V Rico
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - C DeAngelis
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - H Lam
- Odette Cancer Centre, Sunnybrook Health Science Centre, University of Toronto, Toronto, Ontario, Canada
| | - FMY Lim
- Department of Oncology, Prince Margaret Hospital, Hong Kong
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Meira F, Albiach L, Carbonell C, Martín-Oterino JA, Martín-Ordiales M, Linares L, Macaya I, Agüero D, Ambrosioni J, Bodro M, Cardozo C, Chumbita M, De la Mora M, García-Pouton N, Garcia-Vidal C, González-Cordón A, Hernández-Meneses M, Inciarte A, Laguno M, Leal L, Morata L, Puerta-Alcalde P, Rico V, Letona L, Cózar-Llistó A, Dueñas G, Solá M, Torres B, Rojas J, Moreno A, Moreno-García E, Torres M, Martínez JA, Soriano A, García F. Experience with the use of siltuximab in patients with SARS-CoV-2 infection. Rev Esp Quimioter 2021; 34:337-341. [PMID: 33982984 PMCID: PMC8329576 DOI: 10.37201/req/045.2021] [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] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/04/2021] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The study aims to describe characteristics and clinical outcome of patients with SARS-CoV-2 infection that received siltuximab according to a protocol that aimed to early block the activity of IL-6 to avoid the progression of the inflammatory flare. METHODS Retrospective review of the first 31 patients with SARS-CoV-2 treated with siltuximab, in Hospital Clinic of Barcelona or Hospital Universitario Salamanca, from March to April 2020 with positive polymerase-chain reaction (PCR) from a nasopharyngeal swab. RESULTS The cohort included 31 cases that received siltuximab with a median (IQR) age of 62 (56-71) and 71% were males. The most frequent comorbidity was hypertension (48%). The median dose of siltuximab was 800 mg ranging between 785 and 900 mg. 7 patients received siltuximab as a salvage therapy after one dose of tocilizumab. At the end of the study, a total of 26 (83.9) patients had been discharged alive and the mortality rate was 16.1% but only 1 out of 24 that received siltuximab as a first line option (4%). CONCLUSIONS Siltuximab is a well-tolerated alternative to tocilizumab when administered as a first line option in patients with COVID-19 pneumonia within the first 10 days from symptoms onset and high C-reactive protein.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - A Soriano
- Alex Soriano, Department of Infectious Diseases, Hospital Clínic of Barcelona. Carrer de Villarroel 170, 08036, Barcelona, Spain.
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Garcia-Vidal C, Meira F, Cózar-Llistó A, Dueñas G, Puerta-Alcalde P, Garcia-Pouton N, Chumbita M, Cardozo C, Hernandez-Meneses M, Alonso-Navarro R, Rico V, Agüero D, Bodro M, Morata L, Jordan C, Lopera C, Ambrosioni J, Segui F, Grafia N, Castro P, García F, Mensa J, Martínez JA, Sanjuan G, Soriano A. Real-life use of remdesivir in hospitalized patients with COVID-19. Rev Esp Quimioter 2021; 34:136-140. [PMID: 33675220 PMCID: PMC8019465 DOI: 10.37201/req/018.2021] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Objective Controversial results on remdesivir efficacy have been reported. We aimed to report our real-life experience with the use of remdesivir from its availability in Spain. Methods We performed a descriptive study of all patients admitted for ≥48 hours with confirmed COVID-19 who received remdesivir between the 1st of July and the 30th of September 2020. Results A total of 123 patients out of 242 admitted with COVID-19 at our hospital (50.8%) received remdesivir. Median age was 58 years, 61% were males and 56.9 % received at least one anti-inflammatory treatment. No adverse events requiring remdesivir discontinuation were reported. The need of intensive care unit admission, mechanical ventilation and 30-days mortality were 19.5%, 7.3% and 4.1%, respectively. Conclusion In our real-life experience, the use of remdesivir in hospitalized patients with COVID-19 was associated with a low mortality rate and good safety profile.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - A Soriano
- Dr. Alex Soriano, Department of Infectious Diseases, Hospital Clinic of Barcelona, C/ Villarroel 170, 08036 Barcelona, Spain.
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Alvarez R, Garcia-Valenzuela A, Rico V, Garcia-Martin JM, Cotrino J, Gonzalez-Elipe AR, Palmero A. Kinetic energy-induced growth regimes of nanocolumnar Ti thin films deposited by evaporation and magnetron sputtering. Nanotechnology 2019; 30:475603. [PMID: 31426050 DOI: 10.1088/1361-6528/ab3cb2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We experimentally analyze different growth regimes of Ti thin films associated to the existence of kinetic energy-induced relaxation mechanisms in the material's network when operating at oblique geometries. For this purpose, we have deposited different films by evaporation and magnetron sputtering under similar geometrical arrangements and at low temperatures. With the help of a well-established growth model we have found three different growth regimes: (i) low energy deposition, exemplified by the evaporation technique, carried out by species with typical energies in the thermal range, where the morphology and density of the film can be explained by solely considering surface shadowing processes, (ii) magnetron sputtering under weak plasma conditions, where the film growth is mediated by surface shadowing mechanisms and kinetic-energy-induced relaxation processes, and (iii) magnetron sputtering under intense plasma conditions, where the film growth is highly influenced by the plasma, and whose morphology is defined by nanocolumns with similar tilt than evaporated films, but with much higher density. The existence of these three regimes explains the variety of morphologies of nanocolumnar Ti thin films grown at oblique angles under similar conditions in the literature.
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Affiliation(s)
- R Alvarez
- Instituto de Ciencia de Materiales de Sevilla, Avda. Américo Vespucio 49, E-41092 Seville, Spain. Departamento de Física Aplicada I. Escuela Politécnica Superior, Universidad de Sevilla, c/Virgen de África 7, E-41011 Seville, Spain
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Salazar P, Rico V, González-Elipe AR. Nickel/Copper Bilayer-modified Screen Printed Electrode for Glucose Determination in Flow Injection Analysis. ELECTROANAL 2017. [DOI: 10.1002/elan.201700592] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- P. Salazar
- Laboratory of Sensors, Biosensors and Materials, Faculty of Medical Sciences; University of La Laguna, Apdo: 456, CP; 38071 La Laguna, Tenerife Spain
| | - V. Rico
- Laboratory of Nanotechnology on Surfaces; Institute of Materials Science of Seville (CSIC-Univ. Sevilla), CalleAméricoVespucio 49; 41092 Sevilla Spain
| | - Agustín R. González-Elipe
- Laboratory of Nanotechnology on Surfaces; Institute of Materials Science of Seville (CSIC-Univ. Sevilla), CalleAméricoVespucio 49; 41092 Sevilla Spain
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Garcia-Valenzuela A, Lopez-Santos C, Alvarez R, Rico V, Cotrino J, Gonzalez-Elipe AR, Palmero A. Structural control in porous/compact multilayer systems grown by magnetron sputtering. Nanotechnology 2017; 28:465605. [PMID: 29063864 DOI: 10.1088/1361-6528/aa8cf4] [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: 06/07/2023]
Abstract
In this work we analyze a phenomenon that takes place when growing magnetron sputtered porous/compact multilayer systems by alternating the oblique angle and the classical configuration geometries. We show that the compact layers develop numerous fissures rooted in the porous structures of the film below, in a phenomenon that amplifies when increasing the number of stacked layers. We demonstrate that these fissures emerge during growth due to the high roughness of the porous layers and the coarsening of a discontinuous interfacial region. To minimize this phenomenon, we have grown thin interlayers between porous and compact films under the impingement of energetic plasma ions, responsible for smoothing out the interfaces and inhibiting the formation of structural fissures. This method has been tested in practical situations for compact TiO2/porous SiO2 multilayer systems, although it can be extrapolated to other materials and conditions.
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Affiliation(s)
- A Garcia-Valenzuela
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), Americo Vespucio, 49. E-41092 Seville, Spain
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Lopez-Santos C, Alvarez R, Garcia-Valenzuela A, Rico V, Loeffler M, Gonzalez-Elipe AR, Palmero A. Nanocolumnar association and domain formation in porous thin films grown by evaporation at oblique angles. Nanotechnology 2016; 27:395702. [PMID: 27535651 DOI: 10.1088/0957-4484/27/39/395702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Porous thin films grown at oblique angles by evaporation techniques are formed by tilted nanocolumnar structures which, depending on the material type and growth conditions, associate along certain preferential directions, giving rise to large domains. This arrangement, commonly denoted as bundling association, is investigated in the present work by performing fundamental experiments and growth simulations. It is proved that trapping processes of vapor species at the film surface, together with the shadowing mechanism, mediate the anisotropic widening of the nanocolumns and promote their preferential coalescence along certain directions, giving rise to domains with different shape and size. The role of these two processes is thoroughly studied in connection with the formation of these domains in materials as different as SiO2 and TiO2.
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Affiliation(s)
- C Lopez-Santos
- Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla). Americo Vespucio 49, E-41092 Seville, Spain
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Alvarez R, García-Martín JM, Macías-Montero M, Gonzalez-Garcia L, González JC, Rico V, Perlich J, Cotrino J, González-Elipe AR, Palmero A. Growth regimes of porous gold thin films deposited by magnetron sputtering at oblique incidence: from compact to columnar microstructures. Nanotechnology 2013; 24:045604. [PMID: 23299349 DOI: 10.1088/0957-4484/24/4/045604] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Growth regimes of gold thin films deposited by magnetron sputtering at oblique angles and low temperatures are studied from both theoretical and experimental points of view. Thin films were deposited in a broad range of experimental conditions by varying the substrate tilt angle and background pressure, and were analyzed by field emission scanning electron microscopy and grazing-incidence small-angle x-ray scattering techniques. Results indicate that the morphological features of the films strongly depend on the experimental conditions, but can be categorized within four generic microstructures, each of them defined by a different bulk geometrical pattern, pore percolation depth and connectivity. With the help of a growth model, a microstructure phase diagram has been constructed where the main features of the films are depicted as a function of experimentally controllable quantities, finding a good agreement with the experimental results in all the studied cases.
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Affiliation(s)
- R Alvarez
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US), Americo Vespucio 49, E-41092 Seville, Spain.
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