1
|
Caravaggi P, Rogati G, Zamagni L, Boriani L, Arceri A, Ortolani M, Lullini G, Berti L, Leardini A. Functional evaluation of a novel fibreglass-reinforced polyamide custom dynamic AFO for foot drop patients: A pilot study. Gait Posture 2024; 109:41-48. [PMID: 38266422 DOI: 10.1016/j.gaitpost.2024.01.017] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 01/26/2024]
Abstract
BACKGROUND Ankle-foot orthoses (AFOs) are orthopaedic devices often prescribed to treat foot drop. For patients who are not satisfied with off-the-shelf solutions, custom AFOs personalized to the patient's lower limb anatomy are required. Dynamic AFOs provide stability while allowing for physiological ankle mobility in the stance phase of walking. RESEARCH QUESTION Can a morphology-based dynamic custom AFO made of fiberglass-reinforced polyamide restore a quasi-normal gait pattern and improve comfort in patients with foot drop? METHODS In this pilot study, the legs and feet of ten foot drop patients (age=64.9 ± 11.4 years; BMI=26.2 ± 2.1 kg/m2) were scanned using a Kinect-based 3D scanner. A custom AFO was designed and produced for each patient using a fiberglass-reinforced polyamide through selective laser sintering. To assess kinematics, skin markers were placed on relevant bony landmarks according to a validated protocol. Each patient was instructed to walk at a self-selected comfortable speed under three conditions: wearing the custom AFO, wearing an off-the-shelf orthosis (Codivilla spring), and without any AFO (shod condition). Muscle activation in the tibialis anterior, gastrocnemius, rectus femoris and biceps femoris muscles in both legs was recorded using wireless sEMG sensors. The comfort and of each AFO was evaluated using a Visual Analogue Scale. RESULTS The custom AFO resulted in significant increase of stride length and walking speed compared to the shod condition. Except for the hip joint, which exhibited greater maximum flexion and reduced range of motion, the kinematic parameters of all other joints were similar to those observed in a healthy control population. Furthermore, the custom AFO received significantly higher comfort scores compared to the Codivilla spring. SIGNIFICANCE This study has provided evidence supporting the effectiveness of custom orthotic solutions in restoring lower limb kinematics and improving the perceived comfort in foot drop patients compared to off-the-shelf solutions.
Collapse
Affiliation(s)
- P Caravaggi
- Laboratorio di Analisi del Movimento e Valutazione Funzionale Protesi, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - G Rogati
- Laboratorio di Analisi del Movimento e Valutazione Funzionale Protesi, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - L Zamagni
- Laboratorio di Analisi del Movimento e Valutazione Funzionale Protesi, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - L Boriani
- Chirurgia Vertebrale, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - A Arceri
- Chirurgia Vertebrale, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - M Ortolani
- Laboratorio di Analisi del Movimento e Valutazione Funzionale Protesi, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - G Lullini
- Medicina Riabilitativa e Neuroriabilitazione, IRCCS Istituto Scienze Neurologiche, Bologna (Italia).
| | - L Berti
- Università di Bologna, Bologna (Italia); Medicina Fisica e Riabilitativa, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| | - A Leardini
- Laboratorio di Analisi del Movimento e Valutazione Funzionale Protesi, IRCCS Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136, Bologna (Italia).
| |
Collapse
|
2
|
Graziotto L, Macheda F, Venanzi T, Marchese G, Sotgiu S, Ouaj T, Stellino E, Fasolato C, Postorino P, Metzelaars M, Kögerler P, Beschoten B, Calandra M, Ortolani M, Stampfer C, Mauri F, Baldassarre L. Infrared Resonance Raman of Bilayer Graphene: Signatures of Massive Fermions and Band Structure on the 2D Peak. Nano Lett 2024; 24:1867-1873. [PMID: 38306119 DOI: 10.1021/acs.nanolett.3c03502] [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] [Indexed: 02/03/2024]
Abstract
Few-layer graphene possesses low-energy carriers that behave as massive Fermions, exhibiting intriguing properties in both transport and light scattering experiments. Lowering the excitation energy of resonance Raman spectroscopy down to 1.17 eV, we target these massive quasiparticles in the split bands close to the K point. The low excitation energy weakens some of the Raman processes that are resonant in the visible, and induces a clearer frequency-separation of the substructures of the resonance 2D peak in bi- and trilayer samples. We follow the excitation-energy dependence of the intensity of each substructure, and comparing experimental measurements on bilayer graphene with ab initio theoretical calculations, we trace back such modifications on the joint effects of probing the electronic dispersion close to the band splitting and enhancement of electron-phonon matrix elements.
Collapse
Affiliation(s)
- Lorenzo Graziotto
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Francesco Macheda
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genoa, Italy
| | - Tommaso Venanzi
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Guglielmo Marchese
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Simone Sotgiu
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Taoufiq Ouaj
- JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
| | - Elena Stellino
- Department of Physics and Geology, University of Perugia, Via Alessandro Pascoli, 06123 Perugia, Italy
| | - Claudia Fasolato
- Institute for Complex Systems, National Research Council (ISC-CNR), 00185 Rome, Italy
| | - Paolo Postorino
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Marvin Metzelaars
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Paul Kögerler
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Bernd Beschoten
- JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
| | - Matteo Calandra
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genoa, Italy
- Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo, Italy
| | - Michele Ortolani
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Christoph Stampfer
- JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
| | - Francesco Mauri
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, 16163 Genoa, Italy
| | - Leonetta Baldassarre
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| |
Collapse
|
3
|
Venanzi T, Graziotto L, Macheda F, Sotgiu S, Ouaj T, Stellino E, Fasolato C, Postorino P, Mišeikis V, Metzelaars M, Kögerler P, Beschoten B, Coletti C, Roddaro S, Calandra M, Ortolani M, Stampfer C, Mauri F, Baldassarre L. Probing Enhanced Electron-Phonon Coupling in Graphene by Infrared Resonance Raman Spectroscopy. Phys Rev Lett 2023; 130:256901. [PMID: 37418733 DOI: 10.1103/physrevlett.130.256901] [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] [Received: 12/02/2022] [Accepted: 05/15/2023] [Indexed: 07/09/2023]
Abstract
We report on resonance Raman spectroscopy measurements with excitation photon energy down to 1.16 eV on graphene, to study how low-energy carriers interact with lattice vibrations. Thanks to the excitation energy close to the Dirac point at K, we unveil a giant increase of the intensity ratio between the double-resonant 2D and 2D^{'} peaks with respect to that measured in graphite. Comparing with fully ab initio theoretical calculations, we conclude that the observation is explained by an enhanced, momentum-dependent coupling between electrons and Brillouin zone-boundary optical phonons. This finding applies to two-dimensional Dirac systems and has important consequences for the modeling of transport in graphene devices operating at room temperature.
Collapse
Affiliation(s)
- Tommaso Venanzi
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Lorenzo Graziotto
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Francesco Macheda
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, I-16163 Genoa, Italy
| | - Simone Sotgiu
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Taoufiq Ouaj
- JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
| | - Elena Stellino
- Department of Physics and Geology, University of Perugia, via Alessandro Pascoli, 06123 Perugia, Italy
| | - Claudia Fasolato
- Institute for Complex System, National Research Council (ISC-CNR), 00185 Rome, Italy
| | - Paolo Postorino
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Vaidotas Mišeikis
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, I-16163 Genoa, Italy
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation @NEST, Piazza San Silvestro, 12-56126 Pisa, Italy
| | - Marvin Metzelaars
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Paul Kögerler
- Institute of Inorganic Chemistry, RWTH Aachen University, 52074 Aachen, Germany
| | - Bernd Beschoten
- JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
| | - Camilla Coletti
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, I-16163 Genoa, Italy
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation @NEST, Piazza San Silvestro, 12-56126 Pisa, Italy
| | - Stefano Roddaro
- Department of Physics, University of Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
| | - Matteo Calandra
- Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo, Italy
| | - Michele Ortolani
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| | - Christoph Stampfer
- JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
| | - Francesco Mauri
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, I-16163 Genoa, Italy
| | - Leonetta Baldassarre
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Rome, Italy
| |
Collapse
|
4
|
Temperini ME, Polito R, Intze A, Gillibert R, Berkmann F, Baldassarre L, Giliberti V, Ortolani M. A mid-infrared laser microscope for the time-resolved study of light-induced protein conformational changes. Rev Sci Instrum 2023; 94:064102. [PMID: 37862502 DOI: 10.1063/5.0136676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 05/26/2023] [Indexed: 10/22/2023]
Abstract
We have developed a confocal laser microscope operating in the mid-infrared range for the study of light-sensitive proteins, such as rhodopsins. The microscope features a co-aligned infrared and visible illumination path for the selective excitation and probing of proteins located in the IR focus only. An external-cavity tunable quantum cascade laser provides a wavelength tuning range (5.80-6.35 µm or 1570-1724 cm-1) suitable for studying protein conformational changes as a function of time delay after visible light excitation with a pulsed LED. Using cryogen-free detectors, the relative changes in the infrared absorption of rhodopsin thin films around 10-4 have been observed with a time resolution down to 30 ms. The measured full-width at half maximum of the Airy disk at λ = 6.08 µm in transmission mode with a confocal arrangement of apertures is 6.6 µm or 1.1λ. Dark-adapted sample replacement at the beginning of each photocycle is then enabled by exchanging the illuminated thin-film location with the microscope mapping stage synchronized to data acquisition and LED excitation and by averaging hundreds of time traces acquired in different nearby locations within a homogeneous film area. We demonstrate that this instrument provides crucial advantages for time-resolved IR studies of rhodopsin thin films with a slow photocycle. Time-resolved studies of inhomogeneous samples may also be possible with the presented instrument.
Collapse
Affiliation(s)
- Maria Eleonora Temperini
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
- Center for Life Nano & Neuro Science CL2NS, Istituto Italiano di Tecnologia, Viale Regina Elena 291, Rome 00161, Italy
| | - Raffaella Polito
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
| | - Antonia Intze
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
- Center for Life Nano & Neuro Science CL2NS, Istituto Italiano di Tecnologia, Viale Regina Elena 291, Rome 00161, Italy
| | - Raymond Gillibert
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
| | - Fritz Berkmann
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
| | - Leonetta Baldassarre
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
| | - Valeria Giliberti
- Center for Life Nano & Neuro Science CL2NS, Istituto Italiano di Tecnologia, Viale Regina Elena 291, Rome 00161, Italy
| | - Michele Ortolani
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
- Center for Life Nano & Neuro Science CL2NS, Istituto Italiano di Tecnologia, Viale Regina Elena 291, Rome 00161, Italy
| |
Collapse
|
5
|
Malerba M, Sotgiu S, Schirato A, Baldassarre L, Gillibert R, Giliberti V, Jeannin M, Manceau JM, Li L, Davies AG, Linfield EH, Alabastri A, Ortolani M, Colombelli R. Detection of Strong Light-Matter Interaction in a Single Nanocavity with a Thermal Transducer. ACS Nano 2022; 16:20141-20150. [PMID: 36399696 DOI: 10.1021/acsnano.2c04452] [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] [Indexed: 06/16/2023]
Abstract
The concept of strong light-matter coupling has been demonstrated in semiconductor structures, and it is poised to revolutionize the design and implementation of components, including solid state lasers and detectors. We demonstrate an original nanospectroscopy technique that permits the study of the light-matter interaction in single subwavelength-sized nanocavities where far-field spectroscopy is not possible using conventional techniques. We inserted a thin (∼150 nm) polymer layer with negligible absorption in the mid-infrared range (5 μm < λ < 12 μm) inside a metal-insulator-metal resonant cavity, where a photonic mode and the intersubband transition of a semiconductor quantum well are strongly coupled. The intersubband transition peaks at λ = 8.3 μm, and the nanocavity is overall 270 nm thick. Acting as a nonperturbative transducer, the polymer layer introduces only a limited alteration of the optical response while allowing to reveal the optical power absorbed inside the concealed cavity. Spectroscopy of the cavity losses is enabled by the polymer thermal expansion due to heat dissipation in the active part of the cavity, and performed using atomic force microscopy (AFM). This innovative approach allows the typical anticrossing characteristic of the polaritonic dispersion to be identified in the cavity loss spectra at the single nanoresonator level. Results also suggest that near-field coupling of the external drive field to the top metal patch mediated by a metal-coated AFM probe tip is possible, and it enables the near-field mapping of the cavity mode symmetry including in the presence of a strong light-matter interaction.
Collapse
Affiliation(s)
- Mario Malerba
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris-Saclay, 10 Boulevard Thomas Gobert, 91120Palaiseau, France
| | - Simone Sotgiu
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185Rome, Italy
| | - Andrea Schirato
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133Milan, Italy
- Istituto Italiano di Tecnologia, via Morego 30, 16163Genoa, Italy
| | - Leonetta Baldassarre
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185Rome, Italy
| | - Raymond Gillibert
- Center for Life NanoScience, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161Rome, Italy
| | - Valeria Giliberti
- Center for Life NanoScience, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161Rome, Italy
| | - Mathieu Jeannin
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris-Saclay, 10 Boulevard Thomas Gobert, 91120Palaiseau, France
| | - Jean-Michel Manceau
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris-Saclay, 10 Boulevard Thomas Gobert, 91120Palaiseau, France
| | - Lianhe Li
- School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, LS29JTLeeds, United Kingdom
| | - Alexander Giles Davies
- School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, LS29JTLeeds, United Kingdom
| | - Edmund H Linfield
- School of Electronic and Electrical Engineering, University of Leeds, Woodhouse Lane, LS29JTLeeds, United Kingdom
| | - Alessandro Alabastri
- Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas77005, United States
| | - Michele Ortolani
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185Rome, Italy
- Center for Life NanoScience, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161Rome, Italy
| | - Raffaele Colombelli
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris-Saclay, 10 Boulevard Thomas Gobert, 91120Palaiseau, France
| |
Collapse
|
6
|
Temperini ME, Di Giacinto F, Romanò S, Di Santo R, Augello A, Polito R, Baldassarre L, Giliberti V, Papi M, Basile U, Niccolini B, Krasnowska EK, Serafino A, De Spirito M, Di Gaspare A, Ortolani M, Ciasca G. Antenna-enhanced mid-infrared detection of extracellular vesicles derived from human cancer cell cultures. J Nanobiotechnology 2022; 20:530. [PMID: 36514065 PMCID: PMC9746222 DOI: 10.1186/s12951-022-01693-2] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 10/30/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Extracellular Vesicles (EVs) are sub-micrometer lipid-bound particles released by most cell types. They are considered a promising source of cancer biomarkers for liquid biopsy and personalized medicine due to their specific molecular cargo, which provides biochemical information on the state of parent cells. Despite this potential, EVs translation process in the diagnostic practice is still at its birth, and the development of novel medical devices for their detection and characterization is highly required. RESULTS In this study, we demonstrate mid-infrared plasmonic nanoantenna arrays designed to detect, in the liquid and dry phase, the specific vibrational absorption signal of EVs simultaneously with the unspecific refractive index sensing signal. For this purpose, EVs are immobilized on the gold nanoantenna surface by immunocapture, allowing us to select specific EV sub-populations and get rid of contaminants. A wet sample-handling technique relying on hydrophobicity contrast enables effortless reflectance measurements with a Fourier-transform infrared (FTIR) spectro-microscope in the wavelength range between 10 and 3 µm. In a proof-of-principle experiment carried out on EVs released from human colorectal adenocarcinoma (CRC) cells, the protein absorption bands (amide-I and amide-II between 5.9 and 6.4 µm) increase sharply within minutes when the EV solution is introduced in the fluidic chamber, indicating sensitivity to the EV proteins. A refractive index sensing curve is simultaneously provided by our sensor in the form of the redshift of a sharp spectral edge at wavelengths around 5 µm, where no vibrational absorption of organic molecules takes place: this permits to extract of the dynamics of EV capture by antibodies from the overall molecular layer deposition dynamics, which is typically measured by commercial surface plasmon resonance sensors. Additionally, the described metasurface is exploited to compare the spectral response of EVs derived from cancer cells with increasing invasiveness and metastatic potential, suggesting that the average secondary structure content in EVs can be correlated with cell malignancy. CONCLUSIONS Thanks to the high protein sensitivity and the possibility to work with small sample volumes-two key features for ultrasensitive detection of extracellular vesicles- our lab-on-chip can positively impact the development of novel laboratory medicine methods for the molecular characterization of EVs.
Collapse
Affiliation(s)
- Maria Eleonora Temperini
- grid.7841.aDepartment of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy ,grid.25786.3e0000 0004 1764 2907Center for Life Neuro and Nano Sciences IIT@Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Flavio Di Giacinto
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy ,grid.8142.f0000 0001 0941 3192Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Sabrina Romanò
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy ,grid.8142.f0000 0001 0941 3192Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Riccardo Di Santo
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy
| | - Alberto Augello
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy
| | - Raffaella Polito
- grid.7841.aDepartment of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
| | - Leonetta Baldassarre
- grid.7841.aDepartment of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
| | - Valeria Giliberti
- grid.25786.3e0000 0004 1764 2907Center for Life Neuro and Nano Sciences IIT@Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Massimiliano Papi
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy ,grid.8142.f0000 0001 0941 3192Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Umberto Basile
- grid.414603.4Dipartimento di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy
| | - Benedetta Niccolini
- grid.8142.f0000 0001 0941 3192Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Ewa K. Krasnowska
- grid.5326.20000 0001 1940 4177Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Annalucia Serafino
- grid.5326.20000 0001 1940 4177Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Marco De Spirito
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy ,grid.8142.f0000 0001 0941 3192Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Alessandra Di Gaspare
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy ,grid.509494.5NEST, CNR-Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Michele Ortolani
- grid.7841.aDepartment of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy ,grid.25786.3e0000 0004 1764 2907Center for Life Neuro and Nano Sciences IIT@Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Gabriele Ciasca
- grid.414603.4Fondazione Policlinico Universitario “A. Gemelli”, IRCCS, Rome, Italy ,grid.8142.f0000 0001 0941 3192Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica del Sacro Cuore, Rome, Italy
| |
Collapse
|
7
|
Occhicone A, Polito R, Michelotti F, Ortolani M, Baldassarre L, Pea M, Sinibaldi A, Notargiacomo A, Cibella S, Mattioli F, Roy P, Brubach JB, Calvani P, Nucara A. Low-Temperature Stability and Sensing Performance of Mid-Infrared Bloch Surface Waves on a One-Dimensional Photonic Crystal. ACS Appl Mater Interfaces 2022; 14:43853-43860. [PMID: 36106792 PMCID: PMC9523610 DOI: 10.1021/acsami.2c07894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 09/07/2022] [Indexed: 05/27/2023]
Abstract
The growing need for new and reliable surface sensing methods is arousing interest in the electromagnetic excitations of ultrathin films, i.e., to generate electromagnetic field distributions that resonantly interact with the most significant quasi-particles of condensed matter. In such a context, Bloch surface waves turned out to be a valid alternative to surface plasmon polaritons to implement high-sensitivity sensors in the visible spectral range. Only in the last few years, however, has their use been extended to infrared wavelengths, which represent a powerful tool for detecting and recognizing molecular species and crystalline structures. In this work, we demonstrate, by means of high-resolution reflectivity measurements, that a one-dimensional photonic crystal can sustain Bloch surface waves in the infrared spectral range from room temperature down to 10 K. To the best of our knowledge, this is the first demonstration of infrared Bloch surface waves at cryogenic temperatures. Furthermore, by exploiting the enhancement of the surface state and the high brilliance of infrared synchrotron radiation, we demonstrate that the proposed BSW-based sensor has a sensitivity on the order of 2.9 cm-1 for each nanometer-thick ice layer grown on its surface below 150 K. In conclusion, we believe that Bloch surface wave-based sensors are a valid new class of surface mode-based sensors for applications in materials science.
Collapse
Affiliation(s)
- Agostino Occhicone
- Department
of Basic and Applied Sciences for Engineering, Sapienza University of Rome, via A. Scarpa, 16, 00161 Roma, Italy
| | - Raffaella Polito
- Department
of Physics, Sapienza University of Rome, Piazzale A. Moro, 5, 00185 Roma, Italy
| | - Francesco Michelotti
- Department
of Basic and Applied Sciences for Engineering, Sapienza University of Rome, via A. Scarpa, 16, 00161 Roma, Italy
| | - Michele Ortolani
- Department
of Physics, Sapienza University of Rome, Piazzale A. Moro, 5, 00185 Roma, Italy
| | - Leonetta Baldassarre
- Department
of Physics, Sapienza University of Rome, Piazzale A. Moro, 5, 00185 Roma, Italy
| | - Marialilia Pea
- CNR-IFN, Via del Fosso
del Cavaliere, 100, 00133 Roma, Italy
| | - Alberto Sinibaldi
- Department
of Basic and Applied Sciences for Engineering, Sapienza University of Rome, via A. Scarpa, 16, 00161 Roma, Italy
| | | | - Sara Cibella
- CNR-IFN, Via del Fosso
del Cavaliere, 100, 00133 Roma, Italy
| | | | - Pascale Roy
- Synchrotron
SOLEIL, L’Orme des Merisiers,
Saint-Aubin, Gif-sur-Yvette Cedex F-91192, France
| | - Jean-Blaise Brubach
- Synchrotron
SOLEIL, L’Orme des Merisiers,
Saint-Aubin, Gif-sur-Yvette Cedex F-91192, France
| | - Paolo Calvani
- Department
of Physics, Sapienza University of Rome, Piazzale A. Moro, 5, 00185 Roma, Italy
| | - Alessandro Nucara
- CNR-SPIN
and Department of Physics, Sapienza University
of Rome, Piazzale A.
Moro, 5, 00185 Roma, Italy
| |
Collapse
|
8
|
Sidoli C, Zambon A, Tassistro E, Rossi E, Mossello E, Inzitari M, Cherubini A, Marengoni A, Morandi A, Bellelli G, Tarasconi A, Sella M, Paternò G, Faggian G, Lucarelli C, De Grazia N, Alberto C, Porcella L, Nardiello I, Chimenti E, Zeni M, Romairone E, Minaglia C, Ceccotti C, Guerra G, Mantovani G, Monacelli F, Minaglia C, Candiani T, Santolini F, Minaglia C, Rosso M, Bono V, Sibilla S, Dal Santo P, Ceci M, Barone P, Schirinzi T, Formenti A, Nastasi G, Isaia G, Gonella D, Battuello A, Casson S, Calvani D, Boni F, Ciaccio A, Rosa R, Sanna G, Manfredini S, Cortese L, Rizzo M, Prestano R, Greco A, Lauriola M, Gelosa G, Piras V, Arena M, Cosenza D, Bellomo A, LaMontagna M, Gabbani L, Lambertucci L, Perego S, Parati G, Basile G, Gallina V, Pilone G, Giudice C, Pietrogrande L, Mosca M, Corazzin I, Rossi P, Nunziata V, D’Amico F, Grippa A, Giardini S, Barucci R, Cossu A, Fiorin L, Arena M, Distefano M, Lunardelli M, Brunori M, Ruffini I, Abraham E, Varutti A, Fabbro E, Catalano A, Martino G, Leotta D, Marchet A, Dell’Aquila G, Scrimieri A, Davoli M, Casella M, Cartei A, Polidori G, Basile G, Brischetto D, Motta S, Saponara R, Perrone P, Russo G, Del D, Car C, Pirina T, Franzoni S, Cotroneo A, Ghiggia F, Volpi G, Menichetti C, Bo M, Panico A, Calogero P, Corvalli G, Mauri M, Lupia E, Manfredini R, Fabbian F, March A, Pedrotti M, Veronesi M, Strocchi E, Borghi C, Bianchetti A, Crucitti A, DiFrancesco V, Fontana G, Geriatria A, Bonanni L, Barbone F, Serrati C, Ballardini G, Simoncelli M, Ceschia G, Scarpa C, Brugiolo R, Fusco S, Ciarambino T, Biagini C, Tonon E, Porta M, Venuti D, DelSette M, Poeta M, Barbagallo G, Trovato G, Delitala A, Arosio P, Reggiani F, Zuliani G, Ortolani B, Mussio E, Girardi A, Coin A, Ruotolo G, Castagna A, Masina M, Cimino R, Pinciaroli A, Tripodi G, Cassadonte F, Vatrano M, Scaglione L, Fogliacco P, Muzzuilini C, Romano F, Padovani A, Rozzini L, Cagnin A, Fragiacomo F, Desideri G, Liberatore E, Bruni A, Orsitto G, Franco M, Bonfrate L, Bonetto M, Pizio N, Magnani G, Cecchetti G, Longo A, Bubba V, Marinan L, Cotelli M, Turla M, Brunori M, Sessa M, Abruzzi L, Castoldi G, LoVetere D, Musacchio C, Novello M, Cavarape A, Bini A, Leonardi A, Seneci F, Grimaldi W, Seneci F, Fimognari F, Bambar V, Saitta A, Corica F, Braga M, Servi, Ettorre E, Camellini Bellelli CG, Annoni G, Marengoni A, Bruni A, Crescenzo A, Noro G, Turco R, Ponzetto M, Giuseppe L, Mazzei B, Maiuri G, Costaggiu D, Damato R, Fabbro E, Formilan M, Patrizia G, Santuar L, Gallucci M, Minaglia C, Paragona M, Bini P, Modica D, Abati C, Clerici M, Barbera I, NigroImperiale F, Manni A, Votino C, Castiglioni C, Di M, Degl’Innocenti M, Moscatelli G, Guerini S, Casini C, Dini D, DeNotariis S, Bonometti F, Paolillo C, Riccardi A, Tiozzo A, SamySalamaFahmy A, Riccardi A, Paolillo C, DiBari M, Vanni S, Scarpa A, Zara D, Ranieri P, Alessandro M, Calogero P, Corvalli G, Di F, Pezzoni D, Platto C, D’Ambrosio V, Ivaldi C, Milia P, DeSalvo F, Solaro C, Strazzacappa M, Bo M, Panico A, Cazzadori M, Bonetto M, Grasso M, Troisi E, Magnani G, Cecchetti G, Guerini V, Bernardini B, Corsini C, Boffelli S, Filippi A, Delpin K, Faraci B, Bertoletti E, Vannucci M, Crippa P, Malighetti A, Caltagirone C, DiSant S, Bettini D, Maltese F, Formilan M, Abruzzese G, Minaglia C, Cosimo D, Azzini M, Cazzadori M, Colombo M, Procino G, Fascendini S, Barocco F, Del P, D’Amico F, Grippa A, Mazzone A, Cottino M, Vezzadini G, Avanzi S, Brambilla C, Orini S, Sgrilli F, Mello A, Lombardi Muti LE, Dijk B, Fenu S, Pes C, Gareri P, Castagna A, Passamonte M, Rigo R, Locusta L, Caser L, Rosso G, Cesarini S, Cozzi R, Santini C, Carbone P, Cazzaniga I, Lovati R, Cantoni A, Ranzani P, Barra D, Pompilio G, Dimori S, Cernesi S, Riccò C, Piazzolla F, Capittini E, Rota C, Gottardi F, Merla L, Barelli A, Millul A, De G, Morrone G, Bigolari M, Minaglia C, Macchi M, Zambon F, D’Amico F, D’Amico F, Pizzorni C, DiCasaleto G, Menculini G, Marcacci M, Catanese G, Sprini D, DiCasalet T, Bocci M, Borga S, Caironi P, Cat C, Cingolani E, Avalli L, Greco G, Citerio G, Gandini L, Cornara G, Lerda R, Brazzi L, Simeone F, Caciorgna M, Alampi D, Francesconi S, Beck E, Antonini B, Vettoretto K, Meggiolaro M, Garofalo E, Bruni A, Notaro S, Varutti R, Bassi F, Mistraletti G, Marino A, Rona R, Rondelli E, Riva I, Cortegiani A, Pistidda L, D’Andrea R, Querci L, Gnesin P, Todeschini M, Lugano M, Castelli G, Ortolani M, Cotoia A, Maggiore S, DiTizio L, Graziani R, Testa I, Ferretti E, Castioni C, Lombardi F, Caserta R, Pasqua M, Simoncini S, Baccarini F, Rispoli M, Grossi F, Cancelliere L, Carnelli M, Puccini F, Biancofiore G, Siniscalchi A, Laici C, Mossello E, Torrini M, Pasetti G, Palmese S, Oggioni R, Mangani V, Pini S, Martelli M, Rigo E, Zuccalà F, Cherri A, Spina R, Calamai I, Petrucci N, Caicedo A, Ferri F, Gritti P, Brienza N, Fonnesu R, Dessena M, Fullin G, Saggioro D. Prevalence and features of delirium in older patients admitted to rehabilitation facilities: a multicenter study. Aging Clin Exp Res 2022; 34:1827-1835. [PMID: 35396698 DOI: 10.1007/s40520-022-02099-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 02/16/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND Delirium is thought to be common across various settings of care; however, still little research has been conducted in rehabilitation. AIM We investigated the prevalence of delirium, its features and motor subtypes in older patients admitted to rehabilitation facilities during the three editions of the "Delirium Day project". METHODS We conducted a cross-sectional study in which 1237 older patients (age ≥ 65 years old) admitted to 50 Italian rehabilitation wards during the three editions of the "Delirium Day project" (2015 to 2017) were included. Delirium was evaluated through the 4AT and its motor subtype with the Delirium Motor Subtype Scale. RESULTS Delirium was detected in 226 patients (18%), and the most recurrent motor subtype was mixed (37%), followed by hypoactive (26%), hyperactive (21%) and non-motor one (16%). In a multivariate Poisson regression model with robust variance, factors associated with delirium were: disability in basic (PR 1.48, 95%CI: 1.17-1.9, p value 0.001) and instrumental activities of daily living (PR 1.58, 95%CI: 1.08-2.32, p value 0.018), dementia (PR 2.10, 95%CI: 1.62-2.73, p value < 0.0001), typical antipsychotics (PR 1.47, 95%CI: 1.10-1.95, p value 0.008), antidepressants other than selective serotonin reuptake inhibitors (PR 1.3, 95%CI: 1.02-1.66, p value 0.035), and physical restraints (PR 2.37, 95%CI: 1.68-3.36, p value < 0.0001). CONCLUSION This multicenter study reports that 2 out 10 patients admitted to rehabilitations had delirium on the index day. Mixed delirium was the most prevalent subtype. Delirium was associated with unmodifiable (dementia, disability) and modifiable (physical restraints, medications) factors. Identification of these factors should prompt specific interventions aimed to prevent or mitigate delirium.
Collapse
|
9
|
Zucchelli A, Manzoni F, Morandi A, Di Santo S, Rossi E, Valsecchi MG, Inzitari M, Cherubini A, Bo M, Mossello E, Marengoni A, Bellelli G, Tarasconi A, Sella M, Auriemma S, Paternò G, Faggian G, Lucarelli C, De Grazia N, Alberto C, Margola A, Porcella L, Nardiello I, Chimenti E, Zeni M, Giani A, Famularo S, Romairone E, Minaglia C, Ceccotti C, Guerra G, Mantovani G, Monacelli F, Minaglia C, Candiani T, Ballestrero A, Minaglia C, Santolini F, Minaglia C, Rosso M, Bono V, Sibilla S, Dal Santo P, Ceci M, Barone P, Schirinzi T, Formenti A, Nastasi G, Isaia G, Gonella D, Battuello A, Casson S, Calvani D, Boni F, Ciaccio A, Rosa R, Sanna G, Manfredini S, Cortese L, Rizzo M, Prestano R, Greco A, Lauriola M, Gelosa G, Piras V, Arena M, Cosenza D, Bellomo A, LaMontagna M, Gabbani L, Lambertucci L, Perego S, Parati G, Basile G, Gallina V, Pilone G, Giudice C, De F, Pietrogrande L, De B, Mosca M, Corazzin I, Rossi P, Nunziata V, D‘Amico F, Grippa A, Giardini S, Barucci R, Cossu A, Fiorin L, Arena M, Distefano M, Lunardelli M, Brunori M, Ruffini I, Abraham E, Varutti A, Fabbro E, Catalano A, Martino G, Leotta D, Marchet A, Dell‘Aquila G, Scrimieri A, Davoli M, Casella M, Cartei A, Polidori G, Basile G, Brischetto D, Motta S, Saponara R, Perrone P, Russo G, Del D, Car C, Pirina T, Franzoni S, Cotroneo A, Ghiggia F, Volpi G, Menichetti C, Bo M, Panico A, Calogero P, Corvalli G, Mauri M, Lupia E, Manfredini R, Fabbian F, March A, Pedrotti M, Veronesi M, Strocchi E, Bianchetti A, Crucitti A, Di Francesco V, Fontana G, Bonanni L, Barbone F, Serrati C, Ballardini G, Simoncelli M, Ceschia G, Scarpa C, Brugiolo R, Fusco S, Ciarambino T, Biagini C, Tonon E, Porta M, Venuti D, DelSette M, Poeta M, Barbagallo G, Trovato G, Delitala A, Arosio P, Reggiani F, Zuliani G, Ortolani B, Mussio E, Girardi A, Coin A, Ruotolo G, Castagna A, Masina M, Cimino R, Pinciaroli A, Tripodi G, Cannistrà U, Cassadonte F, Vatrano M, Cassandonte F, Scaglione L, Fogliacco P, Muzzuilini C, Romano F, Padovani A, Rozzini L, Cagnin A, Fragiacomo F, Desideri G, Liberatore E, Bruni A, Orsitto G, Franco M, Bonfrate L, Bonetto M, Pizio N, Magnani G, Cecchetti G, Longo A, Bubba V, Marinan L, Cotelli M, Turla M, Brunori M, Sessa M, Abruzzi L, Castoldi G, LoVetere D, Musacchio C, Novello M, Cavarape A, Bini A, Leonardi A, Seneci F, Grimaldi W, Fimognari F, Bambara V, Saitta A, Corica F, Braga M, Ettorre E, Camellini C, Marengoni A, Bruni A, Crescenzo A, Noro G, Turco R, Ponzetto M, Giuseppe L, Mazzei B, Maiuri G, Costaggiu D, Damato R, Fabbro E, Patrizia G, Santuari L, Gallucci M, Minaglia C, Paragona M, Bini P, Modica D, Abati C, Clerici M, Barbera I, NigroImperiale F, Manni A, Votino C, Castiglioni C, Di M, Degl‘Innocenti M, Moscatelli G, Guerini S, Casini C, Dini D, DeNotariis S, Bonometti F, Paolillo C, Riccardi A, Tiozzo A, SamySalamaFahmy A, Riccardi A, Paolillo C, DiBari M, Vanni S, Scarpa A, Zara D, Ranieri P, Calogero P, Corvalli G, Pezzoni D, Gentile S, Morandi A, Platto C, D‘Ambrosio V, Faraci B, Ivaldi C, Milia P, DeSalvo F, Solaro C, Strazzacappa M, Bo M, Panico A, Cazzadori M, Confente S, Bonetto M, Magnani G, Cecchetti G, Guerini V, Bernardini B, Corsini C, Boffelli S, Filippi A, Delpin K, Bertoletti E, Vannucci M, Tesi F, Crippa P, Malighetti A, Caltagirone C, DiSant S, Bettini D, Maltese F, Formilan M, Abruzzese G, Minaglia C, Cosimo D, Azzini M, Cazzadori M, Colombo M, Procino G, Fascendini S, Barocco F, Del P, D‘Amico F, Grippa A, Mazzone A, Riva E, Dell‘Acqua D, Cottino M, Vezzadini G, Avanzi S, Orini S, Sgrilli F, Mello A, Lombardi L, Muti E, Dijk B, Fenu S, Pes C, Gareri P, Castagna A, Passamonte M, De F, Rigo R, Locusta L, Caser L, Rosso G, Cesarini S, Cozzi R, Santini C, Carbone P, Cazzaniga I, Lovati R, Cantoni A, Ranzani P, Barra D, Pompilio G, Dimori S, Cernesi S, Riccò C, Piazzolla F, Capittini E, Rota C, Gottardi F, Merla L, Barelli A, Millul A, De G, Morrone G, Bigolari M, Minaglia C, Macchi M, Zambon F, D‘Amico F, D‘Amico F, Pizzorni C, DiCasaleto G, Menculini G, Marcacci M, Catanese G, Sprini D, DiCasalet T, Bocci M, Borga S, Caironi P, Cat C, Cingolani E, Avalli L, Greco G, Citerio G, Gandini L, Cornara G, Lerda R, Brazzi L, Simeone F, Caciorgna M, Alampi D, Francesconi S, Beck E, Antonini B, Vettoretto K, Meggiolaro M, Garofalo E, Bruni A, Notaro S, Varutti R, Bassi F, Mistraletti G, Marino A, Rona R, Rondelli E, Riva I, Scapigliati A, Cortegiani A, Vitale F, Pistidda L, D‘Andrea R, Querci L, Gnesin P, Todeschini M, Lugano M, Castelli G, Ortolani M, Cotoia A, Maggiore S, DiTizio L, Graziani R, Testa I, Ferretti E, Castioni C, Lombardi F, Caserta R, Pasqua M, Simoncini S, Baccarini F, Rispoli M, Grossi F, Cancelliere L, Carnelli M, Puccini F, Biancofiore G, Siniscalchi A, Laici C, Mossello E, Torrini M, Pasetti G, Palmese S, Oggioni R, Mangani V, Pini S, Martelli M, Rigo E, Zuccalà F, Cherri A, Spina R, Calamai I, Petrucci N, Caicedo A, Ferri F, Gritti P, Brienza N, Fonnesu R, Dessena M, Fullin G, Saggioro D. The association between low skeletal muscle mass and delirium: results from the nationwide multi-centre Italian Delirium Day 2017. Aging Clin Exp Res 2022; 34:349-357. [PMID: 34417734 PMCID: PMC8847195 DOI: 10.1007/s40520-021-01950-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 07/31/2021] [Indexed: 01/22/2023]
Abstract
Introduction Delirium and sarcopenia are common, although underdiagnosed, geriatric
syndromes. Several pathological mechanisms can link delirium and low skeletal muscle mass, but few studies have investigated their association. We aimed to investigate (1) the association between delirium and low skeletal muscle mass and (2) the possible role of calf circumference mass in finding cases with delirium. Methods The analyses were conducted employing the cross-sectional “Delirium Day” initiative, on patient 65 years and older admitted to acute hospital medical wards, emergency departments, rehabilitation wards, nursing homes and hospices in Italy in 2017. Delirium was diagnosed as a 4 + score at the 4-AT scale. Low skeletal muscle mass was operationally defined as calf circumference ≤ 34 cm in males and ≤ 33 cm in females. Logistic regression models were used to investigate the association between low skeletal muscle mass and delirium. The discriminative ability of calf circumference was evaluated using non-parametric ROC analyses. Results A sample of 1675 patients was analyzed. In total, 73.6% of participants had low skeletal muscle mass and 24.1% exhibited delirium. Low skeletal muscle mass and delirium showed an independent association (OR: 1.50; 95% CI 1.09–2.08). In the subsample of patients without a diagnosis of dementia, the inclusion of calf circumference in a model based on age and sex significantly improved its discriminative accuracy [area under the curve (AUC) 0.69 vs 0.57, p < 0.001]. Discussion and conclusion Low muscle mass is independently associated with delirium. In patients without a previous diagnosis of dementia, calf circumference may help to better identify those who develop delirium. Supplementary Information The online version contains supplementary material available at 10.1007/s40520-021-01950-8.
Collapse
|
10
|
Galafassi S, Sighicelli M, Pusceddu A, Bettinetti R, Cau A, Temperini ME, Gillibert R, Ortolani M, Pietrelli L, Zaupa S, Volta P. Microplastic pollution in perch (Perca fluviatilis, Linnaeus 1758) from Italian south-alpine lakes. Environ Pollut 2021; 288:117782. [PMID: 34280746 DOI: 10.1016/j.envpol.2021.117782] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
Microplastic particles (MPs) contamination of aquatic environments has raised a growing concern in recent decades because of their numerous potential toxicological effects. Although fish are among the most studied aquatic organisms, reports on MPs ingestion in freshwater environments are still scarce. Thus, there is still much to study to understand the uptake mechanisms, their potential accumulation among the food webs and their ecotoxicological effects. Here, MPs presence in the digestive system of one of the most widespread and commercially exploited freshwater fish, the perch (Perca fluviatilis, Linnaeus 1758), was investigated in four different south-alpine lakes, to assess the extent of ingestion and evaluate its relation to the body health condition. A total of 80 perch specimen have been sampled from the Italian lakes Como, Garda, Maggiore and Orta. Microplastic particles occurred in 86% of the analysed specimens, with average values ranging from 1.24 ± 1.04 MPs fish-1 in L. Como to 5.59 ± 2.61 MPs fish-1 in L. Garda. The isolated particles were mainly fragments, except in L. Como where films were more abundant. The most common polymers were polyethylene, polyethylene terephthalate, polyamide, and polycarbonate, although a high degree of degradation was found in 43% of synthetic particles, not allowing their recognition up to a single polymer. Despite the high number of ingested MPs, fish health (evaluated by means of Fulton's body condition and hepatosomatic index) was not affected. Instead, fullness index showed an inverse linear relationship with the number of ingested particles, which suggests that also in perch MPs presence could interfere with feeding activity, as already described for other taxa.
Collapse
Affiliation(s)
- Silvia Galafassi
- CNR Water Research Institute, L.go Tonolli 50, 28922, Verbania, Pallanza, Italy.
| | - Maria Sighicelli
- ENEA, Department for Sustainability (SSPT), C.R. Casaccia-Via Anguillarese 301, 00123, Rome, Italy
| | - Antonio Pusceddu
- University of Cagliari, Department of Life and Environmental Sciences, Via T. Fiorelli 1, 09126, Cagliari, Italy
| | - Roberta Bettinetti
- University of Insubria, Department of Human and Innovation for the Territory, Via Valleggio 11, 22100, Como, Italy
| | - Alessandro Cau
- University of Cagliari, Department of Life and Environmental Sciences, Via T. Fiorelli 1, 09126, Cagliari, Italy
| | | | - Raymond Gillibert
- Sapienza University of Rome, Department of Physics, P.le A. Moro 5, 00185, Rome, Italy
| | - Michele Ortolani
- Sapienza University of Rome, Department of Physics, P.le A. Moro 5, 00185, Rome, Italy
| | - Loris Pietrelli
- Sapienza University of Rome, Department of Chemistry, P.le A. Moro, 5, 00185, Rome, Italy
| | - Silvia Zaupa
- CNR Water Research Institute, L.go Tonolli 50, 28922, Verbania, Pallanza, Italy
| | - Pietro Volta
- CNR Water Research Institute, L.go Tonolli 50, 28922, Verbania, Pallanza, Italy
| |
Collapse
|
11
|
Tanga AA, Giliberti V, Vitucci F, Vitulano D, Bruni V, Rossetti A, Messina GC, Daniele M, Ruocco G, Ortolani M. Terahertz scattering microscopy for dermatology diagnostics. J Phys Photonics 2021. [DOI: 10.1088/2515-7647/abfecb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
We explore the possibility of detecting anomalous structures buried under the skin surface by studying the deviations from the ideal Airy pattern of the point-spread function (PSF) of a terahertz microscope that includes the skin as one of the reflecting surfaces of the optical system. Using a custom terahertz microscope with a monochromatic point source emitting at 0.611 THz, we record the PSF images with a microbolometer camera. Skin simulants based on collagen gel, with and without artificial buried structures, have been analyzed. The geometrical features characterizing the PSF deformations have been extracted automatically from the PSF images. A machine learning algorithm applied to these geometrical features produces a reliable classification of targets with or without buried structures with error below 5%. It can even classify targets with anisotropic buried structures according to their different orientation.
Collapse
|
12
|
Occhicone A, Pea M, Polito R, Giliberti V, Sinibaldi A, Mattioli F, Cibella S, Notargiacomo A, Nucara A, Biagioni P, Michelotti F, Ortolani M, Baldassarre L. Spectral Characterization of Mid-Infrared Bloch Surface Waves Excited on a Truncated 1D Photonic Crystal. ACS Photonics 2021; 8:350-359. [PMID: 33585665 PMCID: PMC7871362 DOI: 10.1021/acsphotonics.0c01657] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Indexed: 06/01/2023]
Abstract
The many fundamental roto-vibrational resonances of chemical compounds result in strong absorption lines in the mid-infrared region (λ ∼ 2-20 μm). For this reason, mid-infrared spectroscopy plays a key role in label-free sensing, in particular, for chemical recognition, but often lacks the required sensitivity to probe small numbers of molecules. In this work, we propose a vibrational sensing scheme based on Bloch surface waves (BSWs) on 1D photonic crystals to increase the sensitivity of mid-infrared sensors. We report on the design and deposition of CaF2/ZnS 1D photonic crystals. Moreover, we theoretically and experimentally demonstrate the possibility to sustain narrow σ-polarized BSW modes together with broader π-polarized modes in the range of 3-8 μm by means of a customized Fourier transform infrared spectroscopy setup. The multilayer stacks are deposited directly on CaF2 prisms, reducing the number of unnecessary interfaces when exciting in the Kretschmann-Raether configuration. Finally, we compare the performance of mid-IR sensors based on surface plasmon polaritons with the BSW-based sensor. The figures of merit found for BSWs in terms of confinement of the electromagnetic field and propagation length puts them as forefrontrunners for label-free and polarization-dependent sensing devices.
Collapse
Affiliation(s)
- Agostino Occhicone
- SAPIENZA
University of Rome, Department of Basic
and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161 Roma, Italy
| | - Marialilia Pea
- CNR
Consiglio Nazionale delle Ricerche, Institute for Photonics and Nanotechnologies, Via Cineto Romano, 42, 00156 Roma, Italy
| | - Raffaella Polito
- SAPIENZA
University of Rome, Department of Physics, Piazzale Aldo Moro, 5, 00185 Roma, Italy
| | - Valeria Giliberti
- Istituto
Italiano di Tecnologia, Center for Life
Nanosciences, Viale Regina
Elena, 291, 00161 Roma, Italy
| | - Alberto Sinibaldi
- SAPIENZA
University of Rome, Department of Basic
and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161 Roma, Italy
| | - Francesco Mattioli
- CNR
Consiglio Nazionale delle Ricerche, Institute for Photonics and Nanotechnologies, Via Cineto Romano, 42, 00156 Roma, Italy
| | - Sara Cibella
- CNR
Consiglio Nazionale delle Ricerche, Institute for Photonics and Nanotechnologies, Via Cineto Romano, 42, 00156 Roma, Italy
| | - Andrea Notargiacomo
- CNR
Consiglio Nazionale delle Ricerche, Institute for Photonics and Nanotechnologies, Via Cineto Romano, 42, 00156 Roma, Italy
| | - Alessandro Nucara
- SAPIENZA
University of Rome, Department of Physics, Piazzale Aldo Moro, 5, 00185 Roma, Italy
| | - Paolo Biagioni
- Politecnico
di Milano, Department of Physics, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy
| | - Francesco Michelotti
- SAPIENZA
University of Rome, Department of Basic
and Applied Sciences for Engineering, Via A. Scarpa, 16, 00161 Roma, Italy
| | - Michele Ortolani
- SAPIENZA
University of Rome, Department of Physics, Piazzale Aldo Moro, 5, 00185 Roma, Italy
- Istituto
Italiano di Tecnologia, Center for Life
Nanosciences, Viale Regina
Elena, 291, 00161 Roma, Italy
| | - Leonetta Baldassarre
- SAPIENZA
University of Rome, Department of Physics, Piazzale Aldo Moro, 5, 00185 Roma, Italy
| |
Collapse
|
13
|
Temperini ME, Polito R, Intze A, Schade U, Puskar L, Ritter E, Baldassarre L, Ortolani M, Giliberti V. Infrared nanospectroscopy study of the light-induced conformational changes of Channelrhodopsin. EPJ Web Conf 2021. [DOI: 10.1051/epjconf/202125513001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The channelrhodopsin-ChR2 is a light-sensitive transmembrane protein that acts as a selective ion channel between the intra- and the extra-cellular environments. In the last decade, ChR2 has proven to be essential for optogenetics, because, if expressed in mammalian neural cells, it enables the control of neuronal activity in response to visible light. Mid-infrared difference spectroscopy can probe the functional conformational changes of light-sensitive proteins, however intrinsic limitations of standard IR spectroscopy in terms of diffraction, and therefore number of probed proteins, require that the mid-IR experiments be performed on huge numbers of lipid membrane patches with overexpressed proteins. In this work, we apply for the first time IR difference nanospectroscopy, based on the use of mid-IR lasers and an atomic force microscope (AFM), to single membrane patches containing ChR2, obtaining relevant spectroscopy results for optogenetic applications and, more generally, for future experimental studies of light-sensitive proteins at the nanoscale.
Collapse
|
14
|
Romanò S, Di Giacinto F, Primiano A, Mazzini A, Panzetta C, Papi M, Di Gaspare A, Ortolani M, Gervasoni J, De Spirito M, Nocca G, Ciasca G. Fourier Transform Infrared Spectroscopy as a useful tool for the automated classification of cancer cell-derived exosomes obtained under different culture conditions. Anal Chim Acta 2020; 1140:219-227. [PMID: 33218484 DOI: 10.1016/j.aca.2020.09.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/01/2020] [Accepted: 09/16/2020] [Indexed: 02/07/2023]
Abstract
Exosomes possess great potential as cancer biomarkers in personalized medicine due to their easy accessibility and capability of representing their parental cells. To boost the translational process of exosomes in diagnostics, the development of novel and effective strategies for their label-free and automated characterization is highly desirable. In this context, Fourier Transform Infrared Spectroscopy (FTIR) has great potential as it provides direct access to specific biomolecular bands that give compositional information on exosomes in terms of their protein, lipid and genetic content. Here, we used FTIR spectroscopy in the mid-Infrared (mid-IR) range to study exosomes released from human colorectal adenocarcinoma HT-29 cancer cells cultured in different media. To this purpose, cells were studied in well-fed condition of growth, with 10% of exosome-depleted FBS (EVd-FBS), and under serum starvation with 0.5% EVd-FBS. Our data show the presence of statistically significant differences in the shape of the Amide I and II bands in the two conditions. Based on these differences, we showed the possibility to automatically classify cancer cell-derived exosomes using Principal Component Analysis combined with Linear Discriminant Analysis (PCA-LDA); we tested the effectiveness of the classifier with a cross-validation approach, obtaining very high accuracy, precision, and recall. Aside from classification purposes, our FTIR data provide hints on the underlying cellular mechanisms responsible for the compositional differences in exosomes, suggesting a possible role of starvation-induced autophagy.
Collapse
Affiliation(s)
- Sabrina Romanò
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
| | - Flavio Di Giacinto
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
| | - Aniello Primiano
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy; Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Alberto Mazzini
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Claudia Panzetta
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Massimiliano Papi
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy
| | - Alessandra Di Gaspare
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy; NEST, CNR - Istituto Nanoscienze and Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Michele Ortolani
- Dipartimento di Fisica, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185, Rome, Italy; Istituto Italiano di Tecnologia, Center for Life Nanoscience, Viale Regina Elena 291, I-00161, Rome, Italy
| | - Jacopo Gervasoni
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy; Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Marco De Spirito
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy.
| | - Giuseppina Nocca
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica Del Sacro Cuore, Roma, Italy
| | - Gabriele Ciasca
- Dipartimento di Neuroscienze, Sezione di Fisica, Università Cattolica Del Sacro Cuore, Roma, Italy; Fondazione Policlinico Universitario A. Gemelli IRCCS, Roma, Italy.
| |
Collapse
|
15
|
Gallacher K, Millar RW, Paul DJ, Frigerio J, Ballabio A, Isella G, Rusconi F, Biagioni P, Giliberti V, Sorgi A, Baldassarre L, Ortolani M. Characterization of integrated waveguides by atomic-force-microscopy-assisted mid-infrared imaging and spectroscopy. Opt Express 2020; 28:22186-22199. [PMID: 32752485 DOI: 10.1364/oe.393748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
A novel spectroscopy technique to enable the rapid characterization of discrete mid-infrared integrated photonic waveguides is demonstrated. The technique utilizes lithography patterned polymer blocks that absorb light strongly within the molecular fingerprint region. These act as integrated waveguide detectors when combined with an atomic force microscope that measures the photothermal expansion when infrared light is guided to the block. As a proof of concept, the technique is used to experimentally characterize propagation loss and grating coupler response of Ge-on-Si waveguides at wavelengths from 6 to 10 µm. In addition, when the microscope is operated in scanning mode at fixed wavelength, the guided mode exiting the output facet is imaged with a lateral resolution better than 500 nm i.e. below the diffraction limit. The characterization technique can be applied to any mid-infrared waveguide platform and can provide non-destructive in-situ testing of discrete waveguide components.
Collapse
|
16
|
Ciano C, Virgilio M, Bagolini L, Baldassarre L, Pashkin A, Helm M, Montanari M, Persichetti L, Di Gaspare L, Capellini G, Paul DJ, Scalari G, Faist J, De Seta M, Ortolani M. Terahertz absorption-saturation and emission from electron-doped germanium quantum wells. Opt Express 2020; 28:7245-7258. [PMID: 32225957 DOI: 10.1364/oe.381471] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
We study radiative relaxation at terahertz frequencies in n-type Ge/SiGe quantum wells, optically pumped with a terahertz free electron laser. Two wells coupled through a tunneling barrier are designed to operate as a three-level laser system with non-equilibrium population generated by optical pumping around the 1→3 intersubband transition at 10 THz. The non-equilibrium subband population dynamics are studied by absorption-saturation measurements and compared to a numerical model. In the emission spectroscopy experiment, we observed a photoluminescence peak at 4 THz, which can be attributed to the 3→2 intersubband transition with possible contribution from the 2→1 intersubband transition. These results represent a step towards silicon-based integrated terahertz emitters.
Collapse
|
17
|
Gallacher K, Ortolani M, Rew K, Ciano C, Baldassarre L, Virgilio M, Scalari G, Faist J, Di Gaspare L, De Seta M, Capellini G, Grange T, Birner S, Paul DJ. Design and simulation of losses in Ge/SiGe terahertz quantum cascade laser waveguides. Opt Express 2020; 28:4786-4800. [PMID: 32121710 DOI: 10.1364/oe.384993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
The waveguide losses from a range of surface plasmon and double metal waveguides for Ge/Si1-xGex THz quantum cascade laser gain media are investigated at 4.79 THz (62.6 μm wavelength). Double metal waveguides demonstrate lower losses than surface plasmonic guiding with minimum losses for a 10 μm thick active gain region with silver metal of 21 cm-1 at 300 K reducing to 14.5 cm-1 at 10 K. Losses for silicon foundry compatible metals including Al and Cu are also provided for comparison and to provide a guide for gain requirements to enable lasers to be fabricated in commercial silicon foundries. To allow these losses to be calculated for a range of designs, the complex refractive index of a range of nominally undoped Si1-xGex with x = 0.7, 0.8 and 0.9 and doped Ge heterolayers were extracted from Fourier transform infrared spectroscopy measurements between 0.1 and 10 THz and from 300 K down to 10 K. The results demonstrate losses comparable to similar designs of GaAs/AlGaAs quantum cascade laser plasmon waveguides indicating that a gain threshold of 15.1 cm-1 and 23.8 cm-1 are required to produce a 4.79 THz Ge/SiGe THz laser at 10 K and 300 K, respectively, for 2 mm long double metal waveguide quantum cascade lasers with facet coatings.
Collapse
|
18
|
Ferraro A, Tanga AA, Zografopoulos DC, Messina GC, Ortolani M, Beccherelli R. Guided mode resonance flat-top bandpass filter for terahertz telecom applications. Opt Lett 2019; 44:4239-4242. [PMID: 31465371 DOI: 10.1364/ol.44.004239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 07/30/2019] [Indexed: 06/10/2023]
Abstract
In this work, we design and experimentally demonstrate a novel terahertz (THz) filter exhibiting a flattened spectral response in the atmospheric transmission window around the central frequency of 300 GHz. The innovative concept behind this filter is the coupling of Fabry-Perot and guided mode resonances. The latter arise from a two-dimensional patch array patterned on an aluminum layer deposited on a low loss cyclo-olefin polymer. The filter experimental performance shows high transmittance in the flat-top band, with less than 3 dB losses, and high out-of-band rejection, as theoretically expected. This kind of component provides a cost-effective, functional solution for narrowband filtering in emerging THz devices and systems with possible applications in wireless telecommunications.
Collapse
|
19
|
Lodari M, Biagioni P, Ortolani M, Baldassarre L, Isella G, Bollani M. Plasmon-enhanced Ge-based metal-semiconductor-metal photodetector at near-IR wavelengths. Opt Express 2019; 27:20516-20524. [PMID: 31510144 DOI: 10.1364/oe.27.020516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/10/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate the use of plasmonic effects to boost the near-infrared sensitivity of metal-semiconductor-metal detectors. Plasmon-enhanced photodetection is achieved by properly optimizing Au interdigitated electrodes, micro-fabricated on Ge, a semiconductor that features a strong near IR absorption. Finite-difference time-domain simulations, photocurrent experiments and Fourier-transform IR spectroscopy are performed to validate how a relatively simple tuning of the contact geometry allows for an enhancement of the response of the device adapting it to the specific detection needs. A 2-fold gain factor in the Ge absorption characteristics is experimentally demonstrated at 1.4 µm, highlighting the potential of this approach for optoelectronic and sensing applications.
Collapse
|
20
|
Giliberti V, Polito R, Ritter E, Broser M, Hegemann P, Puskar L, Schade U, Zanetti-Polzi L, Daidone I, Corni S, Rusconi F, Biagioni P, Baldassarre L, Ortolani M. Tip-Enhanced Infrared Difference-Nanospectroscopy of the Proton Pump Activity of Bacteriorhodopsin in Single Purple Membrane Patches. Nano Lett 2019; 19:3104-3114. [PMID: 30950626 PMCID: PMC6745627 DOI: 10.1021/acs.nanolett.9b00512] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 04/02/2019] [Indexed: 05/21/2023]
Abstract
Photosensitive proteins embedded in the cell membrane (about 5 nm thickness) act as photoactivated proton pumps, ion gates, enzymes, or more generally, as initiators of stimuli for the cell activity. They are composed of a protein backbone and a covalently bound cofactor (e.g. the retinal chromophore in bacteriorhodopsin (BR), channelrhodopsin, and other opsins). The light-induced conformational changes of both the cofactor and the protein are at the basis of the physiological functions of photosensitive proteins. Despite the dramatic development of microscopy techniques, investigating conformational changes of proteins at the membrane monolayer level is still a big challenge. Techniques based on atomic force microscopy (AFM) can detect electric currents through protein monolayers and even molecular binding forces in single-protein molecules but not the conformational changes. For the latter, Fourier-transform infrared spectroscopy (FTIR) using difference-spectroscopy mode is typically employed, but it is performed on macroscopic liquid suspensions or thick films containing large amounts of purified photosensitive proteins. In this work, we develop AFM-assisted, tip-enhanced infrared difference-nanospectroscopy to investigate light-induced conformational changes of the bacteriorhodopsin mutant D96N in single submicrometric native purple membrane patches. We obtain a significant improvement compared with the signal-to-noise ratio of standard IR nanospectroscopy techniques by exploiting the field enhancement in the plasmonic nanogap that forms between a gold-coated AFM probe tip and an ultraflat gold surface, as further supported by electromagnetic and thermal simulations. IR difference-spectra in the 1450-1800 cm-1 range are recorded from individual patches as thin as 10 nm, with a diameter of less than 500 nm, well beyond the diffraction limit for FTIR microspectroscopy. We find clear spectroscopic evidence of a branching of the photocycle for BR molecules in direct contact with the gold surfaces, with equal amounts of proteins either following the standard proton-pump photocycle or being trapped in an intermediate state not directly contributing to light-induced proton transport. Our results are particularly relevant for BR-based optoelectronic and energy-harvesting devices, where BR molecular monolayers are put in contact with metal surfaces, and, more generally, for AFM-based IR spectroscopy studies of conformational changes of proteins embedded in intrinsically heterogeneous native cell membranes.
Collapse
Affiliation(s)
- Valeria Giliberti
- Istituto
Italiano di Tecnologia, Center for Life NanoScience, Viale Regina Elena 291, I-00161 Roma, Italy
- E-mail:
| | - Raffaella Polito
- Department
of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - Eglof Ritter
- Humboldt-Universität
zu Berlin, Institut für
Biologie, Invalidenstraße
42, D-10115 Berlin, Germany
| | - Matthias Broser
- Humboldt-Universität
zu Berlin, Institut für
Biologie, Invalidenstraße
42, D-10115 Berlin, Germany
| | - Peter Hegemann
- Humboldt-Universität
zu Berlin, Institut für
Biologie, Invalidenstraße
42, D-10115 Berlin, Germany
| | - Ljiljana Puskar
- Helmholtz-Zentrum
Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Ulrich Schade
- Helmholtz-Zentrum
Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
| | - Laura Zanetti-Polzi
- Department
of Physical and Chemical Sciences, University
of L’Aquila, Via Vetoio, I-67010 L’Aquila, Italy
| | - Isabella Daidone
- Department
of Physical and Chemical Sciences, University
of L’Aquila, Via Vetoio, I-67010 L’Aquila, Italy
| | - Stefano Corni
- Department
of Chemical Sciences, University of Padova, Via Marzolo 1, I-35131 Padova, Italy
- CNR
Institute
of Nanoscience, Via Campi
213/A, I-41125 Modena, Italy
| | - Francesco Rusconi
- Dipartimento
di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
| | - Paolo Biagioni
- Dipartimento
di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
| | - Leonetta Baldassarre
- Department
of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - Michele Ortolani
- Istituto
Italiano di Tecnologia, Center for Life NanoScience, Viale Regina Elena 291, I-00161 Roma, Italy
- Department
of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, I-00185 Roma, Italy
- E-mail:
| |
Collapse
|
21
|
Efthimiopoulos I, Berg M, Bande A, Puskar L, Ritter E, Xu W, Marcelli A, Ortolani M, Harms M, Müller J, Speziale S, Koch-Müller M, Liu Y, Zhao LD, Schade U. Effects of temperature and pressure on the optical and vibrational properties of thermoelectric SnSe. Phys Chem Chem Phys 2019; 21:8663-8678. [PMID: 30973554 DOI: 10.1039/c9cp00897g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We have conducted a comprehensive investigation of the optical and vibrational properties of the binary semiconductor SnSe as a function of temperature and pressure by means of experimental and ab initio probes. Our high-temperature investigations at ambient pressure have successfully reproduced the progressive enhancement of the free carrier concentration upon approaching the Pnma → Bbmm transition, whereas the pressure-induced Pnma → Bbmm transformation at ambient temperature, accompanied by an electronic semiconductor → semi-metal transition, has been identified for bulk SnSe close to 10 GPa. Modeling of the Raman-active vibrations revealed that three-phonon anharmonic processes dominate the temperature-induced mode frequency evolution. In addition, SnSe was found to exhibit a pressure-induced enhancement of the Born effective charge. Such behavior is quite unique and cannot be rationalized within the proposed effective charge trends of binary materials under pressure.
Collapse
Affiliation(s)
- Ilias Efthimiopoulos
- GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Fischer MP, Riede A, Gallacher K, Frigerio J, Pellegrini G, Ortolani M, Paul DJ, Isella G, Leitenstorfer A, Biagioni P, Brida D. Plasmonic mid-infrared third harmonic generation in germanium nanoantennas. Light Sci Appl 2018; 7:106. [PMID: 30564312 PMCID: PMC6290006 DOI: 10.1038/s41377-018-0108-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/22/2018] [Accepted: 11/24/2018] [Indexed: 06/09/2023]
Abstract
We demonstrate third harmonic generation in plasmonic antennas consisting of highly doped germanium grown on silicon substrates and designed to be resonant in the mid-infrared frequency range that is inaccessible with conventional nonlinear plasmonic materials. Owing to the near-field enhancement, the result is an ultrafast, subdiffraction, coherent light source with a wavelength tunable between 3 and 5 µm, and ideally overlapping with the fingerprint region of molecular vibrations. To observe the nonlinearity in this challenging spectral window, a high-power femtosecond laser system equipped with parametric frequency conversion in combination with an all-reflective confocal microscope setup is employed. We demonstrate spatially resolved maps of the linear scattering cross section and the nonlinear emission of single isolated antenna structures. A clear third-order power dependence as well as mid-infrared emission spectra prove the nonlinear nature of the light emission. Simulations support the observed resonance length of the double-rod antenna and demonstrate that the field enhancement inside the antenna material is responsible for the nonlinear frequency mixing.
Collapse
Affiliation(s)
- Marco P. Fischer
- Department of Physics and Center for Applied Photonics, University of Konstanz, 78457 Konstanz, Germany
| | - Aaron Riede
- Department of Physics and Center for Applied Photonics, University of Konstanz, 78457 Konstanz, Germany
| | - Kevin Gallacher
- School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, G12 8LT UK
| | - Jacopo Frigerio
- L-NESS, Dipartimento di Fisica del Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Giovanni Pellegrini
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Michele Ortolani
- Department of Physics, Sapienza University of Rome, 00185 Rome, Italy
| | - Douglas J. Paul
- School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow, G12 8LT UK
| | - Giovanni Isella
- L-NESS, Dipartimento di Fisica del Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Alfred Leitenstorfer
- Department of Physics and Center for Applied Photonics, University of Konstanz, 78457 Konstanz, Germany
| | - Paolo Biagioni
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Daniele Brida
- Department of Physics and Center for Applied Photonics, University of Konstanz, 78457 Konstanz, Germany
- Physics and Materials Science Research Unit, University of Luxembourg, 162a avenue de la Faïencerie, L-1511 Luxembourg, Luxembourg
| |
Collapse
|
23
|
Frigerio J, Ballabio A, Ortolani M, Virgilio M. Modeling of second harmonic generation in hole-doped silicon-germanium quantum wells for mid-infrared sensing. Opt Express 2018; 26:31861-31872. [PMID: 30650765 DOI: 10.1364/oe.26.031861] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/06/2018] [Indexed: 06/09/2023]
Abstract
The development of Ge and SiGe chemical vapor deposition techniques on silicon wafers has enabled the integration of multi-quantum well structures in silicon photonics chips for nonlinear optics with potential applications to integrated nonlinear optics, however research has focused up to now on undoped quantum wells and interband optical excitations. In this work, we present model calculations for the giant nonlinear coefficients provided by intersubband transitions in hole-doped Ge/SiGe and Si/SiGe multi-quantum wells. We employ a valence band-structure model for Si1-xGex to calculate the confined hole states of asymmetric-coupled quantum wells for second-harmonic generation in the mid-infrared. We calculate the nonlinear emission spectra from the second-order susceptibility tensor, including the particular vertical emission spectra of valence-band quantum wells. Two possible nonlinear mid-infrared sensor architectures, one based on waveguides and another based on metasurfaces, are described as perspective application.
Collapse
|
24
|
Falsetti E, Nucara A, Shibayev PP, Salehi M, Moon J, Oh S, Brubach JB, Roy P, Ortolani M, Calvani P. Infrared Spectroscopy of the Topological Surface States of Bi_{2}Se_{3} by Use of the Berreman Effect. Phys Rev Lett 2018; 121:176803. [PMID: 30411918 DOI: 10.1103/physrevlett.121.176803] [Citation(s) in RCA: 1] [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] [Received: 08/11/2018] [Indexed: 06/08/2023]
Abstract
The Berreman effect (BE) allows one to study the electrodynamics of ultrathin conducting films at the surface of dielectrics by use of grazing-angle infrared spectroscopy and polarized radiation. Here, we first apply the BE to the two-dimensional electron system (2DES) at the interface between a high-purity film of the topological insulator Bi_{2}Se_{3} and its sapphire substrate. We determine for the 2DES a charge density n_{s}=(8±1)×10^{12} cm^{-2}, a thickness d=0.6±0.2 nm, and a mobility μ^{IR}=290±30 cm^{2}/V s. Within errors, all of these parameters result in being independent of temperature between 300 and 10 K. These findings consistently indicate that the 2DES is formed by topological surface states, whose infrared response is then directly observed here.
Collapse
Affiliation(s)
- Enrico Falsetti
- Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - Alessandro Nucara
- Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - Pavel P Shibayev
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Maryam Salehi
- Department of Materials Science and Engineering, Rutgers, the State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Jisoo Moon
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Seongshik Oh
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Jean-Blaise Brubach
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - Pascale Roy
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
| | - Michele Ortolani
- Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| | - Paolo Calvani
- Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy
| |
Collapse
|
25
|
Falsetti E, Kalaboukhov A, Nucara A, Ortolani M, Corasaniti M, Baldassarre L, Roy P, Calvani P. High conductivity of ultrathin nanoribbons of SrRuO 3 on SrTiO 3 probed by infrared spectroscopy. Sci Rep 2018; 8:15217. [PMID: 30315227 PMCID: PMC6185982 DOI: 10.1038/s41598-018-33632-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/28/2018] [Indexed: 11/09/2022] Open
Abstract
SrRuO3 (SRO) is a perovskite increasingly used in oxide-based electronics both for its intrinsic metallicity, which remains unaltered in thin films and for the ease of deposition on dielectric perovskites like SrTiO3, (STO) to implement SRO/STO microcapacitors and other devices. In order to test the reliability of SRO/STO also as high-current on-chip conductor, when the SRO dimensions are pushed to the nanoscale, here we have measured the electrodynamic properties of arrays of nanoribbons, fabricated by lithography starting from an ultrathin film of SRO deposited on a STO substrate. The nanoribbons are 6 or 4 nm thick, 400, 200 and 100 nm wide and 5 mm long. The measurements have been performed by infrared spectroscopy, a non-contact weakly perturbing technique which also allows one to separately determine the carrier density and their scattering rate or mobility. Far-infrared reflectivity spectra have been analyzed by Rigorous Coupled-Wave Analysis (RCWA) and by an Effective Medium Theory, obtaining consistent results. With the radiation polarized along the nanoribbons, we obtain a carrier density similar to that of a flat film used as reference, which in turn is similar to that of bulk SRO. Moreover, in the nanoribbons the carrier scattering rate is even smaller than in the unpatterned film by about a factor of 2. This shows that the transport properties of SRO deposited on STO remain at least unaltered down to nanometric dimensions, with interesting perspectives for implementing on-chip nano-interconnects in an oxide-based electronics. When excited in the perpendicular direction, the nanoribbons appear instead virtually transparent to the radiation field, as predicted by RCWA.
Collapse
Affiliation(s)
- E Falsetti
- Dipartimento di Fisica, Università di Roma "La Sapienza", P.le A. Moro 2, I-00185, Roma, Italy
| | - A Kalaboukhov
- Department of Microtechnology & Nanoscience, Chalmers University, S-41296, Gothenburg, Sweden
| | - A Nucara
- CNR-SPIN and Dipartimento di Fisica, Università di Roma "La Sapienza", P.le A. Moro 2, I-00185, Roma, Italy.
| | - M Ortolani
- Dipartimento di Fisica, Università di Roma "La Sapienza", P.le A. Moro 2, I-00185, Roma, Italy
| | - M Corasaniti
- Dipartimento di Fisica, Università di Roma "La Sapienza", P.le A. Moro 2, I-00185, Roma, Italy
| | - L Baldassarre
- Dipartimento di Fisica, Università di Roma "La Sapienza", P.le A. Moro 2, I-00185, Roma, Italy
| | - P Roy
- Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - P Calvani
- CNR-SPIN and Dipartimento di Fisica, Università di Roma "La Sapienza", P.le A. Moro 2, I-00185, Roma, Italy
| |
Collapse
|
26
|
Gallacher K, Millar RW, Griškevičiūte U, Baldassarre L, Sorel M, Ortolani M, Paul DJ. Low loss Ge-on-Si waveguides operating in the 8-14 µm atmospheric transmission window. Opt Express 2018; 26:25667-25675. [PMID: 30469665 DOI: 10.1364/oe.26.025667] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 08/19/2018] [Indexed: 06/09/2023]
Abstract
Germanium-on-silicon waveguides were modeled, fabricated and characterized at wavelengths ranging from 7.5 to 11 µm. Measured waveguide losses are below 5 dB/cm for both TE and TM polarization and reach values of ∼ 1 dB/cm for ≥ 10 µm wavelengths for the TE polarization. This work demonstrates experimentally for the first time that Ge-on-Si is a viable waveguide platform for sensing in the molecular fingerprint spectral region. Detailed modeling and analysis is presented to identify the various loss contributions, showing that with practical techniques losses below 1 dB/cm could be achieved across the full measurement range.
Collapse
|
27
|
Raes F, Eccellente T, Lenzi C, Ortolani M, Luongo G, Mangano C, Mangano F. Immediate functional loading of single implants: a multicenter study with 4 years of follow-up. J Dent Res Dent Clin Dent Prospects 2018; 12:26-37. [PMID: 29732018 PMCID: PMC5928471 DOI: 10.15171/joddd.2018.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 11/28/2017] [Accepted: 03/11/2018] [Indexed: 11/19/2022] Open
Abstract
Background. In the current scientific literature there are only few studies on the immediate functional loading of single implants. The aim of the present present study was to evaluate the 4-year survival rate, complication rate and peri-implant marginal bone loss (PIMBL) of immediately loaded single implants inserted in healed ridges and fresh post-extraction sites.
Methods. Six centers were involved in this prospective study. The surgical and prosthetic protocol was defined in detail, before the start of recruiting patients. Recruitment of patients and performance of surgeries took place between February 2012 and February 2013. Criteria for inclusion were single-tooth gaps in healed ridges and fresh post-extraction sockets. All the fixtures (Anyridge®, Megagen Corporation, Gyeongbuk, South Korea) were functionally loaded immediately after insertion and followed for a period of 4 years. Outcome measures were implant survival, complications and PIMBL.
Results. Forty-six patients (18‒73 years of age) were selected. In total, 57 fixtures were placed (10 in fresh post-extraction sockets). After 4 years of functional loading, only one fixture was lost; therefore, high survival rates (97.6% patient-based; 98.1% implant-based) were reported. In addition, a limited incidence of biologic (4.8% patient-based; 3.8% implant-based) and prosthetic (9.7% patient-based; 7.6% implant-based) complications was reported. The overall 4-year PIMBL amounted to 0.38±0.21 mm (healed ridges: 0.4±0.21 mm; fresh post-extraction sockets: 0.33±0.20 mm).
Conclusion. Loading single implants immediately seems to be a highly successful treatment modality. However, long-term data are needed to confirm these positive outcomes.
Collapse
Affiliation(s)
- Filiep Raes
- Professor, Department of Periodontology and Oral Implantology, University of Ghent, Belgium
| | | | | | | | - Giuseppe Luongo
- Professor, Department of Oral and Maxillofacial Surgery, Dental School, University of Naples, Italy
| | - Carlo Mangano
- Professor, Department of Dental Sciences, University Vita Salute San Raffaele, Milan, Italy
| | - Francesco Mangano
- Lecturer, Department of Surgical and Morphological Science, Dental School, University of Varese, Italy
| |
Collapse
|
28
|
Giliberti V, Badioli M, Nucara A, Calvani P, Ritter E, Puskar L, Aziz EF, Hegemann P, Schade U, Ortolani M, Baldassarre L. Heterogeneity of the Transmembrane Protein Conformation in Purple Membranes Identified by Infrared Nanospectroscopy. Small 2017; 13:1701181. [PMID: 28960799 DOI: 10.1002/smll.201701181] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/02/2017] [Indexed: 06/07/2023]
Abstract
Cell membranes are intrinsically heterogeneous, as the local protein and lipid distribution is critical to physiological processes. Even in template systems embedding a single protein type, like purple membranes, there can be a different local response to external stimuli or environmental factors, resulting in heterogeneous conformational changes. Despite the dramatic advances of microspectroscopy techniques, the identification of the conformation heterogeneity is still a challenging task. Tip-enhanced infrared nanospectroscopy is here used to identify conformational changes connected to the hydration state of the transmembrane proteins contained in a 50 nm diameter cell membrane area, without the need for fluorescent labels. In dried purple membrane monolayers, areas with fully hydrated proteins are found among large numbers of molecules with randomly distributed hydration states. Infrared nanospectroscopy results are compared to the spectra obtained with diffraction-limited infrared techniques based on the use of synchrotron radiation, in which the diffraction limit still prevents the observation of nanoscale heterogeneity.
Collapse
Affiliation(s)
- Valeria Giliberti
- Istituto Italiano di Tecnologia, Center for Life NanoScience, Viale Regina Elena 291, I-00161, Roma, Italy
| | - Michela Badioli
- Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 2, I-00185, Roma, Italy
| | - Alessandro Nucara
- Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 2, I-00185, Roma, Italy
| | - Paolo Calvani
- Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 2, I-00185, Roma, Italy
| | - Eglof Ritter
- Humboldt-Universität zu Berlin, Institut für Biologie, Invalidenstraße 42, D-10115, Berlin, Germany
| | - Ljiljana Puskar
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489, Berlin, Germany
| | - Emad Flear Aziz
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489, Berlin, Germany
| | - Peter Hegemann
- Humboldt-Universität zu Berlin, Institut für Biologie, Invalidenstraße 42, D-10115, Berlin, Germany
| | - Ulrich Schade
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489, Berlin, Germany
| | - Michele Ortolani
- Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 2, I-00185, Roma, Italy
| | - Leonetta Baldassarre
- Istituto Italiano di Tecnologia, Center for Life NanoScience, Viale Regina Elena 291, I-00161, Roma, Italy
- Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 2, I-00185, Roma, Italy
| |
Collapse
|
29
|
Mangano C, Raes F, Lenzi C, Eccellente T, Ortolani M, Luongo G, Mangano F. Immediate Loading of Single Implants: A 2-Year Prospective Multicenter Study. INT J PERIODONT REST 2017; 37:69-78. [PMID: 27977820 DOI: 10.11607/prd.2986] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The aim of this prospective multicenter study was to evaluate the outcomes of single implants subjected to immediate functional loading. Inclusion criteria were single-tooth placement in postextraction sockets or fully healed sites, and sufficient bone height and width to place an implant of at least 3.5 × 10.0 mm. All implants were functionally loaded immediately after placement and followed for 2 years. Outcome measures were implant survival, complications, and peri-implant marginal bone loss (MBL). A total of 57 implants (38 maxilla, 19 mandible) were placed in 46 patients (23 men, 23 women, aged 18-73 years). Of these, 10 implants were placed in postextraction sockets. One implant failed, in a healed site, giving a patient-based overall 2-year survival rate of 97.6%. The incidence of biologic complications was 1.8%; prosthetic complications amounted to 7.5%. The peri-implant MBL was 0.37 ± 0.22 mm (healed sites: 0.4 mm ± 0.22; postextraction sockets: 0.3 mm ± 0.22). The immediate functional loading of single implants seems to represent a safe and successful procedure. Long-term follow-up studies on a larger sample of patients are needed to confirm these results.
Collapse
|
30
|
Garoli D, Calandrini E, Bozzola A, Ortolani M, Cattarin S, Barison S, Toma A, De Angelis F. Boosting infrared energy transfer in 3D nanoporous gold antennas. Nanoscale 2017; 9:915-922. [PMID: 28000833 DOI: 10.1039/c6nr08231a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The applications of plasmonics to energy transfer from free-space radiation to molecules are currently limited to the visible region of the electromagnetic spectrum due to the intrinsic optical properties of bulk noble metals that support strong electromagnetic field confinement only close to their plasma frequency in the visible/ultraviolet range. In this work, we show that nanoporous gold can be exploited as a plasmonic material for the mid-infrared region to obtain strong electromagnetic field confinement, co-localized with target molecules into the nanopores and resonant with their vibrational frequency. The effective optical response of the nanoporous metal enables the penetration of optical fields deep into the nanopores, where molecules can be loaded thus achieving a more efficient light-matter coupling if compared to bulk gold. In order to realize plasmonic resonators made of nanoporous gold, we develop a nanofabrication method based on polymeric templates for metal deposition and we obtain antenna arrays resonating at mid-infrared wavelengths selected by design. We then coat the antennas with a thin (3 nm) silica layer acting as the target dielectric layer for optical energy transfer. We study the strength of the light-matter coupling at the vibrational absorption frequency of silica at 1240 cm-1 through the analysis of the experimental Fano lineshape that is benchmarked against identical structures made of bulk gold. The boost in the optical energy transfer from free-space mid-infrared radiation to molecular vibrations in nanoporous 3D nanoantenna arrays can open new application routes for plasmon-enhanced physical-chemical reactions.
Collapse
Affiliation(s)
- D Garoli
- Istituto Italiano di Tecnologia, Via Morego 30, 16136 Genova, Italy.
| | - E Calandrini
- Istituto Italiano di Tecnologia, Via Morego 30, 16136 Genova, Italy.
| | - A Bozzola
- Istituto Italiano di Tecnologia, Via Morego 30, 16136 Genova, Italy.
| | - M Ortolani
- Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro, 5, I-00185 Roma, Italy
| | - S Cattarin
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia (CNR-ICMATE), Corso Stati Uniti 4, I-35127 Padova, Italy
| | - S Barison
- Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia (CNR-ICMATE), Corso Stati Uniti 4, I-35127 Padova, Italy
| | - A Toma
- Istituto Italiano di Tecnologia, Via Morego 30, 16136 Genova, Italy.
| | - F De Angelis
- Istituto Italiano di Tecnologia, Via Morego 30, 16136 Genova, Italy.
| |
Collapse
|
31
|
Giliberti V, Baldassarre L, Rosa A, de Turris V, Ortolani M, Calvani P, Nucara A. Protein clustering in chemically stressed HeLa cells studied by infrared nanospectroscopy. Nanoscale 2016; 8:17560-17567. [PMID: 27714081 DOI: 10.1039/c6nr05783g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Photo-Thermal Induced Resonance (PTIR) nanospectroscopy, tuned towards amide-I absorption, was used to study the distribution of proteic material in 34 different HeLa cells, of which 18 were chemically stressed by oxidative stress with Na3AsO3. The cell nucleus was found to provide a weaker amide-I signal than the surrounding cytoplasm, while the strongest PTIR signal comes from the perinuclear region. AFM topography shows that the cells exposed to oxidative stress undergo a volume reduction with respect to the control cells, through an accumulation of the proteic material around and above the nucleus. This is confirmed by the PTIR maps of the cytoplasm, where the pixels providing a high amide-I signal were identified with a space resolution of ∼300 × 300 nm. By analyzing their distribution with two different statistical procedures we found that the probability to find protein clusters smaller than 0.6 μm in the cytoplasm of stressed HeLa cells is higher by 35% than in the control cells. These results indicate that it is possible to study proteic clustering within single cells by label-free optical nanospectroscopy.
Collapse
Affiliation(s)
- V Giliberti
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, 00161 Roma, Italy
| | - L Baldassarre
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, 00161 Roma, Italy and Dipartimento di Fisica, Università di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy.
| | - A Rosa
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, 00161 Roma, Italy and Dipartimento di Biologia e Biotecnologie Charles Darwin, Universita di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy
| | - V de Turris
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, 00161 Roma, Italy
| | - M Ortolani
- Dipartimento di Fisica, Università di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy.
| | - P Calvani
- Dipartimento di Fisica, Università di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy.
| | - A Nucara
- Dipartimento di Fisica, Università di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma, Italy.
| |
Collapse
|
32
|
Fischer MP, Schmidt C, Sakat E, Stock J, Samarelli A, Frigerio J, Ortolani M, Paul DJ, Isella G, Leitenstorfer A, Biagioni P, Brida D. Optical Activation of Germanium Plasmonic Antennas in the Mid-Infrared. Phys Rev Lett 2016; 117:047401. [PMID: 27494498 DOI: 10.1103/physrevlett.117.047401] [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] [Received: 04/01/2016] [Indexed: 06/06/2023]
Abstract
Impulsive interband excitation with femtosecond near-infrared pulses establishes a plasma response in intrinsic germanium structures fabricated on a silicon substrate. This direct approach activates the plasmonic resonance of the Ge structures and enables their use as optical antennas up to the mid-infrared spectral range. The optical switching lasts for hundreds of picoseconds until charge recombination redshifts the plasma frequency. The full behavior of the structures is modeled by the electrodynamic response established by an electron-hole plasma in a regular array of antennas.
Collapse
Affiliation(s)
- Marco P Fischer
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany
| | - Christian Schmidt
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany
| | - Emilie Sakat
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Johannes Stock
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany
| | - Antonio Samarelli
- School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, United Kingdom
| | - Jacopo Frigerio
- L-NESS, Dipartimento di Fisica del Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Michele Ortolani
- Department of Physics, Sapienza University of Rome, Rome 00185, Italy
| | - Douglas J Paul
- School of Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, United Kingdom
| | - Giovanni Isella
- L-NESS, Dipartimento di Fisica del Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Alfred Leitenstorfer
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany
| | - Paolo Biagioni
- Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Daniele Brida
- Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany
| |
Collapse
|
33
|
Autore M, Giorgianni F, D' Apuzzo F, Di Gaspare A, Lo Vecchio I, Brahlek M, Koirala N, Oh S, Schade U, Ortolani M, Lupi S. Topologically protected Dirac plasmons and their evolution across the quantum phase transition in a (Bi(1-x)In(x))2Se3 topological insulator. Nanoscale 2016; 8:4667-4671. [PMID: 26852877 DOI: 10.1039/c5nr02976g] [Citation(s) in RCA: 3] [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: 06/05/2023]
Abstract
A 3D Topological Insulator (TI) is an intrinsically stratified electronic material characterized by an insulating bulk and Dirac free electrons at the interface with vacuum or another dielectric. In this paper, we investigate, through terahertz (THz) spectroscopy, the plasmon excitation of Dirac electrons on thin films of (Bi1-xInx)2Se3 TI patterned in the form of a micro-ribbon array, across a Quantum Phase Transition (QPT) from the topological to a trivial insulating phase. The latter is achieved by In doping onto the Bi-site and is characterized by massive electrons at the surface. While the plasmon frequency is nearly independent of In content, the plasmon width undergoes a sudden broadening across the QPT, perfectly mirroring the single particle (free electron) behavior as measured on the same films. This strongly suggests that the topological protection from backscattering characterizing Dirac electrons in the topological phase extends also to their plasmon excitations.
Collapse
Affiliation(s)
- Marta Autore
- INFN and Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale A. Moro 2, I-00185 Roma, Italy.
| | - Flavio Giorgianni
- INFN and Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale A. Moro 2, I-00185 Roma, Italy.
| | - Fausto D' Apuzzo
- Istituto Italiano di Tecnologia and Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale A. Moro 2, I-00185 Roma, Italy
| | - Alessandra Di Gaspare
- CNR - Institute for Photonics and Nanotechnologies, Via Cineto Romano 42, 00156 Rome, Italy
| | - Irene Lo Vecchio
- Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale A. Moro 2, I-00185 Roma, Italy
| | - Matthew Brahlek
- Department of Physics and Astronomy Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
| | - Nikesh Koirala
- Department of Physics and Astronomy Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
| | - Seongshik Oh
- Department of Physics and Astronomy Rutgers, The State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854-8019, USA
| | - Urlich Schade
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Michele Ortolani
- CNR - Institute for Photonics and Nanotechnologies, Via Cineto Romano 42, 00156 Rome, Italy
| | - Stefano Lupi
- INFN and Dipartimento di Fisica, Università di Roma "La Sapienza", Piazzale A. Moro 2, I-00185 Roma, Italy.
| |
Collapse
|
34
|
Baldassarre L, Giliberti V, Rosa A, Ortolani M, Bonamore A, Baiocco P, Kjoller K, Calvani P, Nucara A. Mapping the amide I absorption in single bacteria and mammalian cells with resonant infrared nanospectroscopy. Nanotechnology 2016; 27:075101. [PMID: 26778320 DOI: 10.1088/0957-4484/27/7/075101] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Infrared (IR) nanospectroscopy performed in conjunction with atomic force microscopy (AFM) is a novel, label-free spectroscopic technique that meets the increasing request for nano-imaging tools with chemical specificity in the field of life sciences. In the novel resonant version of AFM-IR, a mid-IR wavelength-tunable quantum cascade laser illuminates the sample below an AFM tip working in contact mode, and the repetition rate of the mid-IR pulses matches the cantilever mechanical resonance frequency. The AFM-IR signal is the amplitude of the cantilever oscillations driven by the thermal expansion of the sample after absorption of mid-IR radiation. Using purposely nanofabricated polymer samples, here we demonstrate that the AFM-IR signal increases linearly with the sample thickness t for t > 50 nm, as expected from the thermal expansion model of the sample volume below the AFM tip. We then show the capability of the apparatus to derive information on the protein distribution in single cells through mapping of the AFM-IR signal related to the amide-I mid-IR absorption band at 1660 cm(-1). In Escherichia Coli bacteria we see how the topography changes, observed when the cell hosts a protein over-expression plasmid, are correlated with the amide I signal intensity. In human HeLa cells we obtain evidence that the protein distribution in the cytoplasm and in the nucleus is uneven, with a lateral resolution better than 100 nm.
Collapse
Affiliation(s)
- L Baldassarre
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, V.le Regina Elena 291, Rome I-00185, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Ciasca G, Papi M, Businaro L, Campi G, Ortolani M, Palmieri V, Cedola A, De Ninno A, Gerardino A, Maulucci G, De Spirito M. Recent advances in superhydrophobic surfaces and their relevance to biology and medicine. Bioinspir Biomim 2016; 11:011001. [PMID: 26844980 DOI: 10.1088/1748-3190/11/1/011001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
By mimicking naturally occurring superhydrophobic surfaces, scientists can now realize artificial surfaces on which droplets of a few microliters of water are forced to assume an almost spherical shape and an extremely high contact angle. In recent decades, these surfaces have attracted much attention due to their technological applications for anti-wetting and self-cleaning materials. Very recently, researchers have shifted their interest to investigate whether superhydrophobic surfaces can be exploited to study biological systems. This research effort has stimulated the design and realization of new devices that allow us to actively organize, visualize and manipulate matter at both the microscale and nanoscale levels. Such precise control opens up wide applications in biomedicine, as it allows us to directly manipulate objects at the typical length scale of cells and macromolecules. This progress report focuses on recent biological and medical applications of superhydrophobicity. Particular regard is paid to those applications that involve the detection, manipulation and study of extremely small quantities of molecules, and to those that allow high throughput cell and biomaterial screening.
Collapse
Affiliation(s)
- G Ciasca
- Istituto di Fisica, Università Cattolica del Sacro Cuore, Largo F Vito 1, 00168 Rome, Italy
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Baldassarre L, Sakat E, Frigerio J, Samarelli A, Gallacher K, Calandrini E, Isella G, Paul DJ, Ortolani M, Biagioni P. Midinfrared Plasmon-Enhanced Spectroscopy with Germanium Antennas on Silicon Substrates. Nano Lett 2015; 15:7225-7231. [PMID: 26457387 DOI: 10.1021/acs.nanolett.5b03247] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Midinfrared plasmonic sensing allows the direct targeting of unique vibrational fingerprints of molecules. While gold has been used almost exclusively so far, recent research has focused on semiconductors with the potential to revolutionize plasmonic devices. We fabricate antennas out of heavily doped Ge films epitaxially grown on Si wafers and demonstrate up to 2 orders of magnitude signal enhancement for the molecules located in the antenna hot spots compared to those located on a bare silicon substrate. Our results set a new path toward integration of plasmonic sensors with the ubiquitous CMOS platform.
Collapse
Affiliation(s)
- Leonetta Baldassarre
- Dipartimento di Fisica, Università di Roma "La Sapienza" , Piazzale Aldo Moro 5, I-00185 Roma, Italy
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia , Viale Regina Elena 291, I-00161 Roma, Italy
| | - Emilie Sakat
- Dipartimento di Fisica, Politecnico di Milano , Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
| | - Jacopo Frigerio
- LNESS, Dipartimento di Fisica del Politecnico di Milano, polo di Como , via Anzani 42, I-22100 Como, Italy
| | - Antonio Samarelli
- School of Engineering, University of Glasgow , Rankine Building, Oakfield Avenue, Glasgow G12 8LT, U.K
| | - Kevin Gallacher
- School of Engineering, University of Glasgow , Rankine Building, Oakfield Avenue, Glasgow G12 8LT, U.K
| | - Eugenio Calandrini
- Dipartimento di Fisica, Università di Roma "La Sapienza" , Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Giovanni Isella
- LNESS, Dipartimento di Fisica del Politecnico di Milano, polo di Como , via Anzani 42, I-22100 Como, Italy
| | - Douglas J Paul
- School of Engineering, University of Glasgow , Rankine Building, Oakfield Avenue, Glasgow G12 8LT, U.K
| | - Michele Ortolani
- Dipartimento di Fisica, Università di Roma "La Sapienza" , Piazzale Aldo Moro 5, I-00185 Roma, Italy
| | - Paolo Biagioni
- Dipartimento di Fisica, Politecnico di Milano , Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
| |
Collapse
|
37
|
De Ninno A, Ciasca G, Gerardino A, Calandrini E, Papi M, De Spirito M, Nucara A, Ortolani M, Businaro L, Baldassarre L. An integrated superhydrophobic-plasmonic biosensor for mid-infrared protein detection at the femtomole level. Phys Chem Chem Phys 2015; 17:21337-42. [PMID: 25712032 DOI: 10.1039/c4cp05023a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In this work we present an integrated biosensor that enables FTIR (Fourier Transform-Infrared) detection of analytes contained in diluted solutions. The fabricated nanosensor allows for the detection of proteins through the identification of the fine structure of their amide I and II bands, up to the nanomolar concentration range. We exploited two distinct effects to enhance the sensitivity: (i) the concentration effect due to the presence of the superhydrophobic surface that conveys molecules dispersed in solution directly inside the focus of a FTIR spectromicroscope; (ii) the plasmonic resonance of the nanoantenna array that provides electromagnetic field enhancement in the amide I and II spectral region (1500-1700 cm(-1)). We demonstrate the detection of ferritin in the nanomolar concentration range, a blood protein that is usually available in small amounts in typical blood samples.
Collapse
Affiliation(s)
- Adele De Ninno
- CNR-Istituto di Fotonica e Nanotecnologie, Via Cineto Romano 42, 00146 Rome, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
D’Angeli V, Belvedere C, Ortolani M, Giannini S, Leardini A. Load along the tibial shaft during activities of daily living. J Biomech 2014; 47:1198-205. [DOI: 10.1016/j.jbiomech.2014.01.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 01/22/2014] [Accepted: 01/23/2014] [Indexed: 10/25/2022]
|
39
|
Luongo G, Lenzi C, Raes F, Eccellente T, Ortolani M, Mangano C. Immediate functional loading of single implants: a 1-year interim report of a 5-year prospective multicentre study. Eur J Oral Implantol 2014; 7:187-199. [PMID: 24977254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE The aim of this prospective multicentre study was to evaluate the clinical outcome of immediately loaded single implants. MATERIALS AND METHODS Patients were recruited at six clinical centres. Inclusion criteria were singletooth replacement in fully healed sites or post-extraction sockets with adequate bone height and width, to place an implant of at least 3.5 mm in diameter and 10.0 mm in length. All implants (AnyRidge, MegaGen, Gyeongbuk, South Korea) were functionally loaded immediately after placement. After 3 months, final crowns were delivered. All implants were followed for 1 year. Outcome measures were: implant stability; complications; peri-implant marginal bone level changes; probing pocket depth. RESULTS Fifty-seven implants (38 in the maxilla and 19 in the mandible) were placed in 46 patients (23 males, 23 females, aged between 18 to 73 years). Ten implants were placed in post-extraction sockets. Two patients (two implants) withdrew from the study and were classified as drop-outs. At the end of the study, only one implant was lost in a healed site. All the surviving implants were stable, giving an overall 1-year survival rate of 97.7% (patient-based). A few complications (one patient experienced swelling after surgery, two had loosened abutments and another patient had a ceramic crown fracture) were encountered. After 1 year of functional loading, the patients had lost an average of 0.32 mm (± 0.22) of peri-implant marginal bone; the mean probing pocket depth (PPD) was 2.16 mm (± 0.68). CONCLUSIONS Within its limit (limited number of patients treated and self-evaluation of the outcomes), this study supports the concept that immediate functional loading of single dental implants can be a successful treatment procedure, with satisfactory clinical outcomes.
Collapse
|
40
|
Cenni V, Capanni C, Columbaro M, Ortolani M, D'Apice M, Novelli G, Fini M, Marmiroli S, Scarano E, Maraldi N, Squarzoni S, Prencipe S, Lattanzi G. Erratum - Autophagic degradation of farnesylated prelamin A as a therapeutic approach to lamin-linked progeria. Eur J Histochem 2013. [PMCID: PMC3896044 DOI: 10.4081/ejh.2013.e42] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
41
|
Di Pietro P, Ortolani M, Limaj O, Di Gaspare A, Giliberti V, Giorgianni F, Brahlek M, Bansal N, Koirala N, Oh S, Calvani P, Lupi S. Observation of Dirac plasmons in a topological insulator. Nat Nanotechnol 2013; 8:556-60. [PMID: 23872838 DOI: 10.1038/nnano.2013.134] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 06/12/2013] [Indexed: 05/26/2023]
Abstract
Plasmons are quantized collective oscillations of electrons and have been observed in metals and doped semiconductors. The plasmons of ordinary, massive electrons have been the basic ingredients of research in plasmonics and in optical metamaterials for a long time. However, plasmons of massless Dirac electrons have only recently been observed in graphene, a purely two-dimensional electron system. Their properties are promising for novel tunable plasmonic metamaterials in the terahertz and mid-infrared frequency range. Dirac fermions also occur in the two-dimensional electron gas that forms at the surface of topological insulators as a result of the strong spin-orbit interaction existing in the insulating bulk phase. One may therefore look for their collective excitations using infrared spectroscopy. Here we report the first experimental evidence of plasmonic excitations in a topological insulator (Bi2Se3). The material was prepared in thin micro-ribbon arrays of different widths W and periods 2W to select suitable values of the plasmon wavevector k. The linewidth of the plasmon was found to remain nearly constant at temperatures between 6 K and 300 K, as expected when exciting topological carriers. Moreover, by changing W and measuring the plasmon frequency in the terahertz range versus k we show, without using any fitting parameter, that the dispersion curve agrees quantitatively with that predicted for Dirac plasmons.
Collapse
Affiliation(s)
- P Di Pietro
- CNR-SPIN, Corso F. Perrone, 16152 Genoa, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
D'Angeli V, Belvedere C, Ortolani M, Giannini S, Leardini A. Load along the femur shaft during activities of daily living. J Biomech 2013; 46:2002-10. [PMID: 23845727 DOI: 10.1016/j.jbiomech.2013.06.012] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 06/12/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
Abstract
A comprehensive knowledge of the loads applied during activities of daily living to the femur shaft is necessary to the design of direct attachments of relevant prostheses. A motion analysis system was used together with an established protocol with skin markers to estimate the three components of the forces and moments acting on ten equidistant points along the full femur shaft. Twenty healthy young volunteers were analyzed while performing three repetitions of the following tasks: level walking at three different speeds, straight-line and with sudden changes of direction to the right and to the left, stairs ascending and descending, squat, rising from a chair and sitting down. Average load patterns, after normalisation for body weight and height, were calculated over subjects for each point, about the three anatomical axes, and for each motor task. These patterns were found consistent over subjects, but different among the anatomical axes and tasks. In general, the moments were observed limitedly influenced by the progression speed, and higher for more proximal points. The moments were also higher in abd/adduction (8.1% body weight*height on average), nearly three times larger than those in flex/extension (2.6) during stair descending. The largest value over all moments was 164.8 N m, abd/adduction in level walking at high speed. The present results should be of value also for a most suitable level for amputation in transfemoral amputation, for in-vitro mechanical tests and for finite element models of the femur.
Collapse
Affiliation(s)
- V D'Angeli
- Movement Analysis Laboratory, Istituto Ortopedico Rizzoli, Bologna, Italy
| | | | | | | | | |
Collapse
|
43
|
Baldassarre L, Ortolani M, Nucara A, Maselli P, Di Gaspare A, Giliberti V, Calvani P. Intrinsic linewidth of the plasmonic resonance in a micrometric metal mesh. Opt Express 2013; 21:15401-15408. [PMID: 23842327 DOI: 10.1364/oe.21.015401] [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: 06/02/2023]
Abstract
The intrinsic linewidth and angular dispersion of Surface Plasmon Polariton resonance of a micrometric metal mesh have been measured with a collimated mid-infrared beam, provided by an External Cavity tunable Quantum Cascade Laser. We show that the use of a collimated beam yields an observed resonance linewidth γ = 12 cm(-1) at the resonance frequency ν0 = 1658 cm(-1), better by an order of magnitude than with a non-collimated beam. The extremely narrow plasmon resonance attained by our mesh is then exploited to reconstruct, by varying the QCL angle of incidence θ, the angular intensity distribution f(θ) of a globar at the focal plane of a conventional imaging setup. We thus show that f(θ) is better reproduced by a Gaussian distribution than by a uniform one, in agreement with ray-tracing simulation.
Collapse
Affiliation(s)
- L Baldassarre
- Center for Life NanoScience@Sapienza, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00185 Rome, Italy
| | | | | | | | | | | | | |
Collapse
|
44
|
Zampieri S, Bettonte P, Ortolani M, Frison G, Schweiger V, Gottin L, Polati E. Procalcitonin as prognostic marker of mortality. Crit Care 2013. [PMCID: PMC3642690 DOI: 10.1186/cc11967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
45
|
De Seta M, Capellini G, Ortolani M, Virgilio M, Grosso G, Nicotra G, Zaumseil P. Narrow intersubband transitions in n-type Ge/SiGe multi-quantum wells: control of the terahertz absorption energy trough the temperature dependent depolarization shift. Nanotechnology 2012; 23:465708. [PMID: 23093292 DOI: 10.1088/0957-4484/23/46/465708] [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: 06/01/2023]
Abstract
In this paper we present a detailed study of the intersubband absorption occurring between electron states confined in strained Ge multi-quantum wells as a function of the temperature. The high structural quality of the samples is reflected by the very narrow absorption line-shape constant with temperature. We observe a temperature driven charge transfer occurring between the ground and the first excited subband which, in turn, induces a change in the depolarization shift and consequently in the energy of the absorbance peak. The experimental observations are well accounted for by a multi-valley k·p model.
Collapse
Affiliation(s)
- M De Seta
- Dipartimento di Fisica E Amaldi, Università di Roma Tre, via Vasca Navale 84, I-00146 Roma, Italy
| | | | | | | | | | | | | |
Collapse
|
46
|
Cenni V, Capanni C, Columbaro M, Ortolani M, D'Apice MR, Novelli G, Fini M, Marmiroli S, Scarano E, Maraldi NM, Squarzoni S, Prencipe S, Lattanzi G. Autophagic degradation of farnesylated prelamin A as a therapeutic approach to lamin-linked progeria. Eur J Histochem 2011; 55:e36. [PMID: 22297442 PMCID: PMC3284238 DOI: 10.4081/ejh.2011.e36] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [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: 07/12/2011] [Revised: 08/07/2011] [Accepted: 08/10/2011] [Indexed: 11/22/2022] Open
Abstract
Farnesylated prelamin A is a processing intermediate produced in the lamin A maturation pathway. Accumulation of a truncated farnesylated prelamin A form, called progerin, is a hallmark of the severe premature ageing syndrome, Hutchinson-Gilford progeria. Progerin elicits toxic effects in cells, leading to chromatin damage and cellular senescence and ultimately causes skin and endothelial defects, bone resorption, lipodystrophy and accelerated ageing. Knowledge of the mechanism underlying prelamin A turnover is critical for the development of clinically effective protein inhibitors that can avoid accumulation to toxic levels without impairing lamin A/C expression, which is essential for normal biological functions. Little is known about specific molecules that may target farnesylated prelamin A to elicit protein degradation. Here, we report the discovery of rapamycin as a novel inhibitor of progerin, which dramatically and selectively decreases protein levels through a mechanism involving autophagic degradation. Rapamycin treatment of progeria cells lowers progerin, as well as wild-type prelamin A levels, and rescues the chromatin phenotype of cultured fibroblasts, including histone methylation status and BAF and LAP2α distribution patterns. Importantly, rapamycin treatment does not affect lamin C protein levels, but increases the relative expression of the prelamin A endoprotease ZMPSTE24. Thus, rapamycin, an antibiotic belonging to the class of macrolides, previously found to increase longevity in mouse models, can serve as a therapeutic tool, to eliminate progerin, avoid farnesylated prelamin A accumulation, and restore chromatin dynamics in progeroid laminopathies.
Collapse
Affiliation(s)
- V Cenni
- National Research Council of Italy, Institute of Molecular Genetics, IGM-CNR, Unit of Bologna IOR, Bologna, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Lupi S, Nicoletti D, Limaj O, Baldassarre L, Ortolani M, Ono S, Ando Y, Calvani P. Far-infrared absorption and the metal-to-insulator transition in hole-doped cuprates. Phys Rev Lett 2009; 102:206409. [PMID: 19519052 DOI: 10.1103/physrevlett.102.206409] [Citation(s) in RCA: 3] [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] [Received: 12/23/2008] [Indexed: 05/27/2023]
Abstract
By studying the optical conductivity of Bi(2)Sr(2-x)La(x)CuO(6) and Y(0.97)Ca(0.03)Ba(2)Cu(3)O(6), we show that the metal-to-insulator transition in these hole-doped cuprates is driven by the opening of a small gap at low T in the far infrared. Its width is consistent with the observations of angle-resolved photoemission spectroscopy in other cuprates, along the nodal line of the k space. The gap forms as the Drude term turns into a far-infrared absorption, whose peak frequency can be approximately predicted on the basis of a Mott-like transition. Another band in the midinfrared softens with doping but is less sensitive to the metal-to-insulator transition.
Collapse
Affiliation(s)
- S Lupi
- CNR-INFM Coherentia and Dipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Richter H, Semenov AD, Pavlov SG, Mahler L, Tredicucci A, Beere HE, Ritchie DA, Ortolani M, Schade U, Il'in KS, Siegel M, Hübers HW. Development of a THz heterodyne receiver with quantum cascade laser and hot electron bolometer mixer for standoff detection of explosive material. ACTA ACUST UNITED AC 2009. [DOI: 10.1117/12.818134] [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: 11/14/2022]
|
49
|
Nucara A, Maselli P, Calvani P, Sopracase R, Ortolani M, Gruener G, Guidi MC, Schade U, García J. Observation of charge-density-wave excitations in manganites. Phys Rev Lett 2008; 101:066407. [PMID: 18764484 DOI: 10.1103/physrevlett.101.066407] [Citation(s) in RCA: 2] [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] [Received: 05/12/2008] [Indexed: 05/26/2023]
Abstract
In the optical conductivity of four different manganites with commensurate charge order (CO), strong peaks appear in the meV range below the ordering temperature T_{CO}. They are similar to those reported for one-dimensional charge density waves (CDW) and are assigned to pinned phasons. The peaks and their overtones allow one to obtain, for La_{1-n/8}Ca_{n/8}MnO_{3} with n=5, 6, the electron-phonon coupling, the effective mass of the CO system, and its contribution to the dielectric constant. These results support a description of the CO in La-Ca manganites in terms of moderately weak coupling and of the CDW theory.
Collapse
Affiliation(s)
- A Nucara
- CNR-INFM Coherentia and Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale A. Moro 2, I-00185 Roma, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Dörr S, Schade U, Hellwig P, Ortolani M. Characterization of Temperature-Dependent Iron−Imidazole Vibrational Modes in Far Infrared. J Phys Chem B 2007; 111:14418-22. [DOI: 10.1021/jp076666y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sabine Dörr
- Laboratoire de spectroscopie vibrationnelle et électrochimie des biomolécules, Institut de Chimie, UMR 7177, Université Louis Pasteur, 4 rue Blaise Pascal, F-67000 Strasbourg, France, and Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung mbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Ulrich Schade
- Laboratoire de spectroscopie vibrationnelle et électrochimie des biomolécules, Institut de Chimie, UMR 7177, Université Louis Pasteur, 4 rue Blaise Pascal, F-67000 Strasbourg, France, and Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung mbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Petra Hellwig
- Laboratoire de spectroscopie vibrationnelle et électrochimie des biomolécules, Institut de Chimie, UMR 7177, Université Louis Pasteur, 4 rue Blaise Pascal, F-67000 Strasbourg, France, and Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung mbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - Michele Ortolani
- Laboratoire de spectroscopie vibrationnelle et électrochimie des biomolécules, Institut de Chimie, UMR 7177, Université Louis Pasteur, 4 rue Blaise Pascal, F-67000 Strasbourg, France, and Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung mbH, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| |
Collapse
|