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2. All-optical spin injection in silicon revealed by element specific time-resolved Kerr effect

Author

Laterza, Simone, Caretta, Antonio, Bhardwaj, Richa, Flammini, Roberto, Moras, Paolo, MatteoJugovac, Rajak, Piu, Islam, Mahabul, Ciancio, Regina, Bonanni, Valentina, Casarin, Barbara, Simoncig, Alberto, Zangrando, Marco, Ribic, Primoz Rebernik, Penco, Giuseppe, De Ninno, Giovanni, LucaGiannessi, Demidovich, Alexander, Danailov, Miltcho, Parmigiani, Fulvio, and Malvestuto, Marco

Subjects
Condensed Matter - Materials Science
Abstract

Understanding how a spin current flows across metal-semiconductor interfaces at pico- and femtosecond timescales has implications for ultrafast spintronics, data processing and storage applications. However, the possibility to directly access the propagation of spin currents on such time scales has been hampered by the simultaneous lack of both ultrafast element specific magnetic sensitive probes and tailored metal-semiconductor interfaces. Here, by means of free electron laser-based element sensitive Kerr spectroscopy, we report direct experimental evidence of spin currents across a Ni/Si interface in the form of different magnetodynamics at the Ni M2,3 and Si L2,3 absorption edges. This further allows us to calculate the propagation velocity of the spin current in silicon, which is on the order of 0.2 nm/fs.

Published
2021

5. Tailoring ferromagnetism through electrically controlled morphology

Author

Vinai, Giovanni, Motti, Federico, Bonanni, Valentina, Cassese, Damiano, Prato, Stefano, Rossi, Giorgio, Panaccione, Giancarlo, and Torelli, Piero

Subjects
Condensed Matter - Materials Science
Abstract

Converse magnetoelectric coupling in artificial multiferroics is generally modelled through three possible mechanisms: charge transfer, strain mediated or ion migration. Here we demonstrate a novel and highly reliable approach, where electrically controlled morphological modifications control the ferromagnetic response of a magnetoelectric heterostructure, specifically FexMn1-x ferromagnetic films on ferroelectric PMN-PT (001) substrates. The ferroelectric PMN-PT substrates present, in correspondence to electrical switching, fully reversible morphological changes at the surface, to which correspond reproducible modifications of the ferromagnetic response of the FexMn1-x films. Topographic analysis by atomic force microscopy shows the formation of surface cracks after application of a positive electric field up to 6 kV/cm, which disappear after application of negative voltage of the same amplitude. In-operando x-ray magnetic circular dichroic spectroscopy at Fe edge in FexMn1-x layers shows local variations of dichroic signal up to a factor 2.5 as a function of the electrically-driven morphological state. These findings highlight the role of morphology and surface topography as a key aspect in magnetoelectric coupling, whose proof of electrically reversible modification of the magnetic response adds a new possibility in the design of multiferroic heterostructures with electrically controlled functionalities.

Published
2018
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7. An innovative in situ AFM system for a soft X-ray spectromicroscopy synchrotron beamline.

Author

Hafner, Aljoša, Costa, Luca, Kourousias, George, Bonanni, Valentina, žiηić, Milan, Stolfa, Andrea, Bazi, Benjamin, Vincze, Laszlo, and Gianoncelli, Alessandra

Subjects
SOFT X rays, ATOMIC force microscopy, X-ray microscopy, X-ray fluorescence, SPECTRAL imaging, SYNCHROTRONS
Abstract

Multimodal imaging and spectroscopy like concurrent scanning transmission X-ray microscopy (STXM) and X-ray fluorescence (XRF) are highly desirable as they allow retrieving complementary information. This paper reports on the design, development, integration and field testing of a novel in situ atomic force microscopy (AFM) instrument for operation under high vacuum in a synchrotron soft X-ray microscopy STXM–XRF end-station. A combination of μXRF and AFM is demonstrated for the first time in the soft X-ray regime, with an outlook for the full XRF–STXM–AFM combination. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Morphological and lipid metabolism alterations in macrophages exposed to model environmental nanoplastics traced by high-resolution synchrotron techniques

Author

Zingaro, Federica, primary, Gianoncelli, Alessandra, additional, Ceccone, Giacomo, additional, Birarda, Giovanni, additional, Cassano, Domenico, additional, La Spina, Rita, additional, Agostinis, Chiara, additional, Bonanni, Valentina, additional, Ricci, Giuseppe, additional, and Pascolo, Lorella, additional

Published
2023
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10. Magnetoplasmonics

Author

Pellegrini, Giovanni, Bonanni, Valentina, Campo, Giulio, Pineider, Francesco, Sangregorio, Claudio, de Fernández, César Julián, Casoli, Francesca, Manera, Maria Grazia, Rella, Roberto, Mattei, Giovanni, and Bhushan, Bharat, editor

Published
2016
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12. Impact of Sample Preparation Methods on Single-Cell X-ray Microscopy and Light Elemental Analysis Evaluated by Combined Low Energy X-ray Fluorescence, STXM and AFM

Author

Merolle, Lucia, primary, Pascolo, Lorella, additional, Zupin, Luisa, additional, Parisse, Pietro, additional, Bonanni, Valentina, additional, Gariani, Gianluca, additional, Kenig, Sasa, additional, Bedolla, Diana E., additional, Crovella, Sergio, additional, Ricci, Giuseppe, additional, Iotti, Stefano, additional, Malucelli, Emil, additional, Kourousias, George, additional, and Gianoncelli, Alessandra, additional

Published
2023
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16. All-optical spin injection in silicon investigated by element-specific time-resolved Kerr effect

Author

Laterza, Simone, primary, Caretta, Antonio, additional, Bhardwaj, Richa, additional, Flammini, Roberto, additional, Moras, Paolo, additional, Jugovac, Matteo, additional, Rajak, Piu, additional, Islam, Mahabul, additional, Ciancio, Regina, additional, Bonanni, Valentina, additional, Casarin, Barbara, additional, Simoncig, Alberto, additional, Zangrando, Marco, additional, Ribič, Primož Rebernik, additional, Penco, Giuseppe, additional, De Ninno, Giovanni, additional, Giannessi, Luca, additional, Demidovich, Alexander, additional, Danailov, Miltcho, additional, Parmigiani, Fulvio, additional, and Malvestuto, Marco, additional

Published
2022
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17. Impact of sample preparation methods on single cell X-ray microscopy and light elemental analysis evaluated by combined Low Energy X-ray Fluorescence, STXM and AFM

Author

Merolle, Lucia, primary, Pascolo, Lorella, additional, Zupin, Luisa, additional, Parisse, Pietro, additional, Bonanni, Valentina, additional, Gariani, Gianluca, additional, Kenig, Sasa, additional, Bedolla, Diana, additional, Crovella, Sergio, additional, Ricci, Giuseppe, additional, Iotti, Stefano, additional, Malucelli, Emil, additional, Kourousias, George, additional, and Gianoncelli, Alessandra, additional

Published
2022
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20. Synchrotron Radiation Study of Gain, Noise, and Collection Efficiency of GaAs SAM-APDs with Staircase Structure

Author

Colja, Matija, primary, Cautero, Marco, additional, Menk, Ralf Hendrik, additional, Palestri, Pierpaolo, additional, Gianoncelli, Alessandra, additional, Antonelli, Matias, additional, Biasiol, Giorgio, additional, Dal Zilio, Simone, additional, Steinhartova, Tereza, additional, Nichetti, Camilla, additional, Arfelli, Fulvia, additional, De Angelis, Dario, additional, Driussi, Francesco, additional, Bonanni, Valentina, additional, Pilotto, Alessandro, additional, Gariani, Gianluca, additional, Carrato, Sergio, additional, and Cautero, Giuseppe, additional

Published
2022
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22. The impact of small and asymptomatic intramural and subserosal fibroids on female fertility: a case–control study.

Author

Bonanni, Valentina, Reschini, Marco, Vecchia, Irene La, Castiglioni, Marta, Muzii, Ludovico, Vercellini, Paolo, and Somigliana, Edgardo

Subjects
UTERINE fibroids, FEMALE infertility, ENDOMETRIAL diseases
Abstract

STUDY QUESTION Do small and asymptomatic intramural and subserosal uterine fibroids affect female fertility? SUMMARY ANSWER Small and asymptomatic fibroids that do not encroach the endometrial cavity appear to not markedly affect female fertility. WHAT IS KNOWN ALREADY The available evidence on uterine fibroids and fertility is limited. Most information has been obtained in IVF settings by comparing the success in women affected and not affected by fibroids. These studies have shown a detrimental effect of submucosal and possibly intramural fibroids. However, this study design provides information only on embryo implantation, not on female fertility in general. STUDY DESIGN, SIZE, DURATION A retrospective observational case–control study on 200 women whose partner was diagnosed with severe male infertility and 200 women with unexplained infertility was conducted. If the null hypothesis (that fibroids do not affect fertility) is valid, one would expect a similar prevalence of fibroids in the two study groups. Conversely, if fibroids do impact fertility, one would expect a higher prevalence among women with unexplained infertility. The study was carried out at the Infertility Unit of the Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico covering a 5-year period between January 2014 and June 2020. PARTICIPANTS/MATERIALS, SETTING, METHODS We retrospectively recruited women seeking pregnancy whose partner was repeatedly documented to have a sperm concentration below 1 million/ml and matched them by age and study period to a group of women with unexplained infertility. The latter group of women was considered as a case group (infertile subjects), while the former group of women was considered as a control group (reflecting the general female population). Women with fibroids could be included in both study groups; only those with submucosal lesions were excluded. MAIN RESULTS AND THE ROLE OF CHANCE Fibroids were diagnosed in 31 women (16%) with unexplained infertility and in 32 women (16%) with severe male factor infertility. The adjusted odds ratio of carrying fibroids in women with unexplained infertility was 0.91 (95% CI: 0.52–1.58). Subgroup analyses according to number, dimension and location of fibroids failed to highlight an increased risk of infertility in any group. LIMITATIONS, REASONS FOR CAUTION This is a retrospective study and some inaccuracies in fibroids detection cannot be ruled out. Moreover, the relatively small sample size hampers robust subgroup analyses. Even though we excluded women with patent causes of infertility, some women with specific causes of infertility could have been included among controls (yet are expected to account for <10% of the group). WIDER IMPLICATIONS OF THE FINDINGS This study suggests that small fibroids that do not encroach the endometrial cavity do not markedly affect female fertility. This information is clinically relevant when counseling infertile women with small fibroids and an otherwise unremarkable diagnostic work-up. Surgery may still be considered but only in selected cases. STUDY FUNDING/COMPETING INTEREST(S) This study was partially funded by Italian Ministry of Health: current research IRCCS. E.S. reports grants from Ferring, grants and personal fees from Merck, and grants and personal fees from Theramex outside the submitted work. All the other authors do not have any competing interest to declare. TRIAL REGISTRATION NUMBER N/A. [ABSTRACT FROM AUTHOR]

Published
2023
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23. High Magnetic Field Magneto-optics on Plasmonic Silica-Embedded Silver Nanoparticles

Author

Gabbani, Alessio, primary, Campo, Giulio, additional, Bonanni, Valentina, additional, van Rhee, Peter, additional, Bottaro, Gregorio, additional, de Julián Fernández, César, additional, Bello, Valentina, additional, Fantechi, Elvira, additional, Biccari, Francesco, additional, Gurioli, Massimo, additional, Armelao, Lidia, additional, Sangregorio, Claudio, additional, Mattei, Giovanni, additional, Christianen, Peter, additional, and Pineider, Francesco, additional

Published
2022
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25. Magnetoplasmonics

Author

Pellegrini, Giovanni, primary, Bonanni, Valentina, additional, Campo, Giulio, additional, Pineider, Francesco, additional, Sangregorio, Claudio, additional, de Julián Fernández, César, additional, Casoli, Francesca, additional, Manera, Maria Grazia, additional, Rella, Roberto, additional, and Mattei, Giovanni, additional

Published
2015
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27. Copper Oxide Nanomaterial Fate in Plant Tissue: Nanoscale Impacts on Reproductive Tissues

Author

Marmiroli, Marta, primary, Pagano, Luca, additional, Rossi, Riccardo, additional, De La Torre-Roche, Roberto, additional, Lepore, Giovanni Orazio, additional, Ruotolo, Roberta, additional, Gariani, Gianluca, additional, Bonanni, Valentina, additional, Pollastri, Simone, additional, Puri, Alessandro, additional, Gianoncelli, Alessandra, additional, Aquilanti, Giuliana, additional, d’Acapito, Francesco, additional, White, Jason C., additional, and Marmiroli, Nelson, additional

Published
2021
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29. A novel free-electron laser single-pulse Wollaston polarimeter for magneto-dynamical studies

Author

Caretta, Antonio, primary, Laterza, Simone, additional, Bonanni, Valentina, additional, Sergo, Rudi, additional, Dri, Carlo, additional, Cautero, Giuseppe, additional, Galassi, Fabio, additional, Zamolo, Matteo, additional, Simoncig, Alberto, additional, Zangrando, Marco, additional, Gessini, Alessandro, additional, Zilio, Simone Dal, additional, Flammini, Roberto, additional, Moras, Paolo, additional, Demidovich, Alexander, additional, Danailov, Miltcho, additional, Parmigiani, Fulvio, additional, and Malvestuto, Marco, additional

Published
2021
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30. Dielectric Effects in FeOx-Coated Au Nanoparticles Boost the Magnetoplasmonic Response: Implications for Active Plasmonic Devices

Author

Gabbani, Alessio, primary, Fantechi, Elvira, additional, Petrucci, Gaia, additional, Campo, Giulio, additional, de Julián Fernández, César, additional, Ghigna, Paolo, additional, Sorace, Lorenzo, additional, Bonanni, Valentina, additional, Gurioli, Massimo, additional, Sangregorio, Claudio, additional, and Pineider, Francesco, additional

Published
2021
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32. Interplay between morphology and magnetoelectric coupling in Fe/PMN-PT multiferroic heterostructures studied by microscopy techniques

Author

Motti, Federico, primary, Vinai, Giovanni, additional, Bonanni, Valentina, additional, Polewczyk, Vincent, additional, Mantegazza, Paola, additional, Forrest, Thomas, additional, Maccherozzi, Francesco, additional, Benedetti, Stefania, additional, Rinaldi, Christian, additional, Cantoni, Matteo, additional, Cassese, Damiano, additional, Prato, Stefano, additional, Dhesi, Sarnjeet S., additional, Rossi, Giorgio, additional, Panaccione, Giancarlo, additional, and Torelli, Piero, additional

Published
2020
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34. The role of alpha lipoic acid in female and male infertility: a systematic review.

Author

Di Tucci, Chiara, Galati, Giulia, Mattei, Giulia, Bonanni, Valentina, Capri, Oriana, D'Amelio, Renzo, Muzii, Ludovico, and Benedetti Panici, Pierluigi

Subjects
FEMALE infertility, LIPOIC acid, MALE infertility, PELVIC pain, REACTIVE oxygen species
Abstract

Copyright of Gynecological Endocrinology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2021
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37. Ferroelectrics: Reversible Modification of Ferromagnetism through Electrically Controlled Morphology (Adv. Electron. Mater. 7/2019)

Author

Vinai, Giovanni, primary, Motti, Federico, additional, Bonanni, Valentina, additional, Petrov, Aleksander Yu., additional, Benedetti, Stefania, additional, Rinaldi, Christian, additional, Stella, Mattia, additional, Cassese, Damiano, additional, Prato, Stefano, additional, Cantoni, Matteo, additional, Rossi, Giorgio, additional, Panaccione, Giancarlo, additional, and Torelli, Piero, additional

Published
2019
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38. Reversible Modification of Ferromagnetism through Electrically Controlled Morphology

Author

Vinai, Giovanni, primary, Motti, Federico, additional, Bonanni, Valentina, additional, Petrov, Aleksander Yu., additional, Benedetti, Stefania, additional, Rinaldi, Christian, additional, Stella, Mattia, additional, Cassese, Damiano, additional, Prato, Stefano, additional, Cantoni, Matteo, additional, Rossi, Giorgio, additional, Panaccione, Giancarlo, additional, and Torelli, Piero, additional

Published
2019
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39. Role of Zn2+ Substitution on the Magnetic, Hyperthermic, and Relaxometric Properties of Cobalt Ferrite Nanoparticles

Author

Albino, Martin, primary, Fantechi, Elvira, additional, Innocenti, Claudia, additional, López-Ortega, Alberto, additional, Bonanni, Valentina, additional, Campo, Giulio, additional, Pineider, Francesco, additional, Gurioli, Massimo, additional, Arosio, Paolo, additional, Orlando, Tomas, additional, Bertoni, Giovanni, additional, de Julián Fernández, Cesar, additional, Lascialfari, Alessandro, additional, and Sangregorio, Claudio, additional

Published
2019
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40. Plasmon-enhanced magneto-optical detection of single-molecule magnets

Author

Pineider, Francesco, primary, Pedrueza-Villalmanzo, Esteban, additional, Serri, Michele, additional, Adamu, Addis Mekonnen, additional, Smetanina, Evgeniya, additional, Bonanni, Valentina, additional, Campo, Giulio, additional, Poggini, Lorenzo, additional, Mannini, Matteo, additional, de Julián Fernández, César, additional, Sangregorio, Claudio, additional, Gurioli, Massimo, additional, Dmitriev, Alexandre, additional, and Sessoli, Roberta, additional

Published
2019
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45. Study of Gaseous Interactions on Co3O4Thin Film Coatings by Ambient Pressure Soft X-ray Absorption Spectroscopy

Author

Edla, Raju, Braglia, Luca, Bonanni, Valentina, Miotello, Antonio, Rossi, Giorgio, and Torelli, Piero

Abstract

The redox process of pretreated Co3O4thin film coatings has been studied by ambient pressure soft X-ray absorption spectroscopy. The Co3O4coatings were composed of nanoparticles of about 10 nm in size as prepared by pulsed laser deposition. The thin film coatings were pretreated in He or in H2up to 150 °C prior to exposure to the reactive gases. The reactivity toward carbon monoxide and oxygen was monitored by near-edge X-ray absorption fine structure (NEXAFS) spectroscopy during gas exposures. The results indicate that the samples pretreated in He show reactivity only at high temperature, while the samples pretreated in H2are reactive also at room temperature. X-ray photoemission spectroscopy measurements in ultra-high vacuum and NEXAFS simulations with the CTM4XAS code further specify the results.

Published
2019
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47. Tuning the Composition of Alloy Nanoparticles Through Laser Mixing: The Role of Surface Plasmon Resonance

Author

Messina, Gabriele C., primary, Sinatra, Marco G., additional, Bonanni, Valentina, additional, Brescia, Rosaria, additional, Alabastri, Alessandro, additional, Pineider, Francesco, additional, Campo, Giulio, additional, Sangregorio, Claudio, additional, Li-Destri, Giovanni, additional, Sfuncia, Gianfranco, additional, Marletta, Giovanni, additional, Condorelli, Marcello, additional, Proietti Zaccaria, Remo, additional, De Angelis, Francesco, additional, and Compagnini, Giuseppe, additional

Published
2016
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48. Role of Zn2+Substitution on the Magnetic, Hyperthermic, and Relaxometric Properties of Cobalt Ferrite Nanoparticles

Author

Albino, Martin, Fantechi, Elvira, Innocenti, Claudia, López-Ortega, Alberto, Bonanni, Valentina, Campo, Giulio, Pineider, Francesco, Gurioli, Massimo, Arosio, Paolo, Orlando, Tomas, Bertoni, Giovanni, de Julián Fernández, Cesar, Lascialfari, Alessandro, and Sangregorio, Claudio

Abstract

Zinc substitution is often proposed as an efficient strategy to improve the performances of spinel ferrite nanoparticles, particularly related to their application as theranostic agents. In this work, a series of 8 nm spinel ferrite nanoparticles of formula CoxZnyFe3–(x+y)O4is synthesized by thermal decomposition with the purpose of investigating the role of Zn2+ions in modifying the structural and magnetic properties. Contrary to most of the literature on this subject, where the sum of Co and Zn is kept constant (x+ y= 1), here, the amount of Co is maintained at ca. x= 0.6, corresponding to the maximum of magnetic anisotropy of the Zn-undoped system, whereas the amount of Zn is progressively varied along the series from y= 0.05 to 0.4. This approach allows enlightening the effect of the Zn introduction on the magnetic and crystal structures and, particularly, on magnetic anisotropy, which is deeply investigated by several complementary techniques. A significant increase of the saturation magnetization, MS, upon the Zn content up to y= 0.4 is confirmed only at low temperature, whereas at room temperature, this effect is partially nullified by the weakening of the magnetic exchange coupling constants due to the increasing Zn substitution. Moreover, we demonstrate that the lattice modifications following the Zn introduction are responsible of a strong decrease of the particle magnetic anisotropy. Overall, these effects limit the use of Zn-substituted ferrites in biomedical applications like magnetic resonance imaging and magnetic fluid hyperthermia only to very low amount of Zn, as here confirmed by relaxometric and calorimetric measurements.

Published
2019
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