1
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Ramò L, Giordano MC, Ferrando G, Canepa P, Telesio F, Repetto L, Buatier de Mongeot F, Canepa M, Bisio F. Thermal Scanning-Probe Lithography for Broad-Band On-Demand Plasmonic Nanostructures on Transparent Substrates. ACS Appl Nano Mater 2023; 6:18623-18631. [PMID: 37854851 PMCID: PMC10580238 DOI: 10.1021/acsanm.3c04398] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 09/21/2023] [Indexed: 10/20/2023]
Abstract
Thermal scanning-probe lithography (t-SPL) is a high-resolution nanolithography technique that enables the nanopatterning of thermosensitive materials by means of a heated silicon tip. It does not require alignment markers and gives the possibility to assess the morphology of the sample in a noninvasive way before, during, and after the patterning. In order to exploit t-SPL at its peak performances, the writing process requires applying an electric bias between the scanning hot tip and the sample, thereby restricting its application to conductive, optically opaque, substrates. In this work, we show a t-SPL-based method, enabling the noninvasive high-resolution nanolithography of photonic nanostructures onto optically transparent substrates across a broad-band visible and near-infrared spectral range. This was possible by intercalating an ultrathin transparent conductive oxide film between the dielectric substrate and the sacrificial patterning layer. This way, nanolithography performances comparable with those typically observed on conventional semiconductor substrates are achieved without significant changes of the optical response of the final sample. We validated this innovative nanolithography approach by engineering periodic arrays of plasmonic nanoantennas and showing the capability to tune their plasmonic response over a broad-band visible and near-infrared spectral range. The optical properties of the obtained systems make them promising candidates for the fabrication of hybrid plasmonic metasurfaces supported onto fragile low-dimensional materials, thus enabling a variety of applications in nanophotonics, sensing, and thermoplasmonics.
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Affiliation(s)
- Lorenzo Ramò
- OptMatLab,
Dipartimento di Fisica, Università
di Genova, Via Dodecaneso 33, I-16146 Genova, Italy
| | - Maria Caterina Giordano
- LabNano,
Dipartimento di Fisica, Università
di Genova, Via Dodecaneso
33, I-16146 Genova, Italy
| | - Giulio Ferrando
- LabNano,
Dipartimento di Fisica, Università
di Genova, Via Dodecaneso
33, I-16146 Genova, Italy
| | - Paolo Canepa
- OptMatLab,
Dipartimento di Fisica, Università
di Genova, Via Dodecaneso 33, I-16146 Genova, Italy
| | - Francesca Telesio
- Dipartimento
di Fisica, Università di Genova, Via Dodecaneso 33, I-16146 Genova, Italy
| | - Luca Repetto
- Nanomed
Laboratories, Dipartimento di Fisica, Università
di Genova, Via Dodecaneso
33, I-16146 Genova, Italy
| | | | - Maurizio Canepa
- OptMatLab,
Dipartimento di Fisica, Università
di Genova, Via Dodecaneso 33, I-16146 Genova, Italy
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2
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Barelli M, Casado S, Cassin F, Pimentel C, Pina C, Giordano MC, Buatier de Mongeot F, Gnecco E. Highly Efficient Sequestration of Aqueous Lead on Nanostructured Calcite Substrates. Nanotechnology 2023. [PMID: 37279698 DOI: 10.1088/1361-6528/acdbd4] [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: 06/08/2023]
Abstract
Following defocused ion beam sputtering, large area highly corrugated and faceted nanoripples are formed on calcite (10.4) faces in a self-organized fashion. High resolution AFM imaging reveals that calcite ripples are defined by facets with highly kinked (11.0) and (2.12) terminations. In situ AFM imaging during the exposure of such modified calcite surfaces to PbCl2 aqueous solution reveals that the nanostructured calcite surface promotes the uptake of Pb. In addition, we observed the progressive smoothing of the highly reactive calcite facet terminations and the formation of Pb-bearing precipitates elongated in registry with the underlying nanopattern. By SEM-EDS analysis we quantified a remarkable 500% increase of the Pb uptake rate, up to 0.5 atomic weight % per hour, on the nanorippled calcite in comparison to its freshly cleaved (10.4) surfaces. These results suggest that nanostructurated calcite surfaces can be used for developing future systems for lead sequestration from polluted waters.
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Affiliation(s)
- Matteo Barelli
- Università degli Studi di Genova Dipartimento di Fisica, Via Dodecaneso 33, Genova, Liguria, 16146, ITALY
| | - Santiago Casado
- Facultad de Ciencia e Ingeniería en Alimentos, Universidad Tecnica de Ambato, Avda. Los Chasquis y río Payamino s/n, Ambato, 108207, ECUADOR
| | - Felix Cassin
- University of Pittsburgh Department of Mechanical Engineering and Materials Science, Benedum Hall #636, Pittsburgh, Pennsylvania, 15261, UNITED STATES
| | - Carlos Pimentel
- Instituto Andaluz de Ciencias de la Tierra, Av. de las Palmeras, 4, Granada, Andalucía, 18002, SPAIN
| | - Carlos Pina
- Universidad Complutense de Madrid Facultad de Ciencias Geologicas, C. de José Antonio Novais, 12, Madrid, Comunidad de Madrid, 28040, SPAIN
| | - Maria Caterina Giordano
- University of Genoa, Physics Department, Via Dodecaneso 33, 16146, Genoa, Italy, Genova, Liguria, 16146, ITALY
| | | | - Enrico Gnecco
- Jagiellonian University in Krakow Faculty of Physics Astronomy and Applied Computer Science, Łojasiewicza 11, Krakow, 30-348, POLAND
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3
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Chowdhury D, Mohamed SA, Manzato G, Siri B, Chittofrati R, Giordano MC, Hussein M, Hameed MFO, Obayya SSA, Stadler P, Scharber MC, Della Valle G, Buatier de Mongeot F. Broadband Photon Harvesting in Organic Photovoltaic Devices Induced by Large-Area Nanogrooved Templates. ACS Appl Nano Mater 2023; 6:6230-6240. [PMID: 37092122 PMCID: PMC10112484 DOI: 10.1021/acsanm.3c00553] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/15/2023] [Indexed: 05/03/2023]
Abstract
Thin-film organic photovoltaic (OPV) devices represent an attractive alternative to conventional silicon solar cells due to their lightweight, flexibility, and low cost. However, the relatively low optical absorption of the OPV active layers still represents an open issue in view of efficient devices that cannot be addressed by adopting conventional light coupling strategies derived from thick PV absorbers. The light coupling to thin-film solar cells can be boosted by nanostructuring the device interfaces at the subwavelength scale. Here, we demonstrate broadband and omnidirectional photon harvesting in thin-film OPV devices enabled by highly ordered one-dimensional (1D) arrays of nanogrooves. Laser interference lithography, in combination with reactive ion etching (RIE), provides the controlled tailoring of the height and periodicity of the silica grooves, enabling effective tuning of the anti-reflection properties in the active organic layer (PTB7:PCBM). With this strategy, we demonstrate a strong enhancement of the optical absorption, as high as 19% with respect to a flat device, over a broadband visible and near-infrared spectrum. The OPV device supported on these optimized nanogrooved substrates yields a 14% increase in short-circuit current over the corresponding flat device, highlighting the potential of this large-scale light-harvesting strategy in the broader context of thin-film technologies.
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Affiliation(s)
- Debasree Chowdhury
- Department
of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Shaimaa A. Mohamed
- Centre
for Photonics and Smart Materials, Zewail
City of Science, Technology and Innovation, October Gardens, 6th of October
City, Giza 12578, Egypt
- Centre
for Nanotechnology, Zewail City of Science,
Technology and Innovation, October Gardens, 6th of October City, Giza 12578, Egypt
- Nanotechnology
and Nanoelectronics Engineering Program, Zewail City of Science, Technology and Innovation, October Gardens, 6th of October
City, Giza 12578, Egypt
- Physical
Chemistry, Linz Institute for Organic Solar
Cell (LIOS), Johannes Kepler University Linz, Altenbergerstr, 69, A-4040 Linz, Austria
| | - Giacomo Manzato
- Department
of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Beatrice Siri
- Department
of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Roberto Chittofrati
- Department
of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | | | - Mohamed Hussein
- Centre
for Photonics and Smart Materials, Zewail
City of Science, Technology and Innovation, October Gardens, 6th of October
City, Giza 12578, Egypt
- Department
of Physics, Faculty of Science, Ain Shams
University, Abbassia, 11566 Cairo, Egypt
- Light
Technology Institute, Karlsruhe Institute of Technology, Engesserstrasse 13, 76131 Karlsruhe, Germany
| | - Mohamed F. O. Hameed
- Centre
for Photonics and Smart Materials, Zewail
City of Science, Technology and Innovation, October Gardens, 6th of October
City, Giza 12578, Egypt
- Nanotechnology
and Nanoelectronics Engineering Program, Zewail City of Science, Technology and Innovation, October Gardens, 6th of October
City, Giza 12578, Egypt
- Mathematics
and Engineering Physics Department, Faculty of Engineering, University of Mansoura, Mansoura 35516, Egypt
| | - Salah S. A. Obayya
- Centre
for Photonics and Smart Materials, Zewail
City of Science, Technology and Innovation, October Gardens, 6th of October
City, Giza 12578, Egypt
- Department
of Electronics and Communication Engineering, Faculty of Engineering, University of Mansoura, Mansoura 35516, Egypt
| | - Philipp Stadler
- Physical
Chemistry, Linz Institute for Organic Solar
Cell (LIOS), Johannes Kepler University Linz, Altenbergerstr, 69, A-4040 Linz, Austria
| | - Markus C. Scharber
- Physical
Chemistry, Linz Institute for Organic Solar
Cell (LIOS), Johannes Kepler University Linz, Altenbergerstr, 69, A-4040 Linz, Austria
| | - Giuseppe Della Valle
- Dipartimento
di Fisica and IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci, 32-20133 Milano, Italy
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4
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Ferrando G, Gardella M, Zambito G, Barelli M, Chowdhury D, Giordano MC, Buatier de Mongeot F. Flat-optics hybrid MoS 2/polymer films for photochemical conversion. Nanoscale 2023; 15:1953-1961. [PMID: 36625311 DOI: 10.1039/d2nr05004h] [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: 06/17/2023]
Abstract
Novel light harvesting platforms and strategies are crucial to develop renewable photon to energy conversion technologies that overcome the current global energy and environmental challenges. Two-dimensional (2D) transition metal dichalcogenide (TMD) semiconductor layers are particularly attractive for photoconversion applications but new ultra-compact photon harvesting schemes are urgently required to mitigate their poor photon absorption properties. Here, we propose a flat-optics scheme based on nanogrooved ultra-thin MoS2 layers conformally grown onto large area (cm2 scale) nanopatterned templates. The subwavelength re-shaping of the 2D-TMD layers promotes the excitation of photonic Rayleigh anomaly (RA) modes, uniquely boosting a strong in-plane electromagnetic confinement. By tailoring the illumination conditions, we demonstrate effective tuning of the photonic anomalies over a broadband visible spectrum across the absorption band of relevant polluting dye molecules. Thanks to the strong photonic in-plane confinement, we achieve a resonant enhancement of the photodissociation rate of methylene blue (MB) molecules, well above a factor of 2. These results highlight the potential of flat-optics photon harvesting schemes for boosting photoconversion efficiency in large-scale hybrid 2D-TMD/polymer layers, with a strong impact in various applications ranging from new-generation photonics to waste water remediation and renewable energy storage.
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Affiliation(s)
- Giulio Ferrando
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - Matteo Gardella
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - Giorgio Zambito
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - Matteo Barelli
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - Debasree Chowdhury
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
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5
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Manzato G, Giordano MC, Barelli M, Chowdhury D, Centini M, de Mongeot FB. Free-standing plasmonic nanoarrays for leaky optical waveguiding and sensing. Opt Express 2022; 30:17371-17382. [PMID: 36221562 DOI: 10.1364/oe.453135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/22/2022] [Indexed: 06/16/2023]
Abstract
Flat optics nanogratings supported on thin free-standing membranes offer the opportunity to combine narrowband waveguided modes and Rayleigh anomalies for sensitive and tunable biosensing. At the surface of high-refractive index Si3N4 membranes we engineered lithographic nanogratings based on plasmonic nanostripes, demonstrating the excitation of sharp waveguided modes and lattice resonances. We achieved fine tuning of these optical modes over a broadband Visible and Near-Infrared spectrum, in full agreement with numerical calculations. This possibility allowed us to select sharp waveguided modes supporting strong near-field amplification, extending for hundreds of nanometres out of the grating and enabling versatile biosensing applications. We demonstrate the potential of this flat-optics platform by devising a proof-of-concept nanofluidic refractive index sensor exploiting the long-range waveguided mode operating at the sub-picoliter scale. This free-standing device configuration, that could be further engineered at the nanoscale, highlights the strong potential of flat-optics nanoarrays in optofluidics and nanofluidic biosensing.
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6
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Chowdhury D, Mondal S, Secchi M, Giordano MC, Vanzetti L, Barozzi M, Bersani M, Giubertoni D, Buatier de Mongeot F. Omnidirectional and broadband photon harvesting in self-organized Ge columnar nanovoids. Nanotechnology 2022; 33:305304. [PMID: 35385839 DOI: 10.1088/1361-6528/ac64ae] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
Highly porous Germanium surfaces with uniformly distributed columnar nanovoid structures are fabricated over a large area (wafer scale) by large fluence Sn+irradiation through a thin silicon nitride layer. The latter represents a one-step highly reproducible approach with no material loss to strongly increase photon harvesting into a semiconductor active layer by exploiting the moth-eye antireflection effect. The ion implantation through the nitride cap layer allows fabricating porous nanostructures with high aspect ratio, which can be tailored by varying ion fluence. By comparing the reflectivity of nanoporous Ge films with a flat reference we demonstrate a strong and omnidirectional reduction in the optical reflectivity by a factor of 96% in the selected spectral regions around 960 nm and by a factor of 67.1% averaged over the broad spectral range from 350 to 1800 nm. Such highly anti-reflective nanostructured Ge films prepared over large-areas with a self-organized maskless approach have the potential to impact real world applications aiming at energy harvesting.
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Affiliation(s)
- Debasree Chowdhury
- Dipartimento di Fisica, Università degli Studi di Genova, via Dodecaneso 33, I-16146, Genova, Italy
| | - Shyamal Mondal
- Sensors and Devices, Fondazione Bruno Kessler, Via Sommarive 18, I-38123, Trento, Italy
| | - Maria Secchi
- Sensors and Devices, Fondazione Bruno Kessler, Via Sommarive 18, I-38123, Trento, Italy
| | - Maria Caterina Giordano
- Dipartimento di Fisica, Università degli Studi di Genova, via Dodecaneso 33, I-16146, Genova, Italy
| | - Lia Vanzetti
- Sensors and Devices, Fondazione Bruno Kessler, Via Sommarive 18, I-38123, Trento, Italy
| | - Mario Barozzi
- Sensors and Devices, Fondazione Bruno Kessler, Via Sommarive 18, I-38123, Trento, Italy
| | - Massimo Bersani
- Sensors and Devices, Fondazione Bruno Kessler, Via Sommarive 18, I-38123, Trento, Italy
| | - Damiano Giubertoni
- Sensors and Devices, Fondazione Bruno Kessler, Via Sommarive 18, I-38123, Trento, Italy
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7
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Marcucci N, Zambito G, Giordano MC, Buatier de Mongeot F, Descrovi E. Controlling resonant surface modes by arbitrary light induced optical anisotropies. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226605008] [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: 11/05/2022] Open
Abstract
In this work the sensitivity of Bloch Surface Waves to laser-induced anisotropy of azo-polymeric thin layers is expe rimentally shown . The nanoscale reshaping of the films via thermal-Scanning Probe Lithography allows to couple light to circular photonic nanocavities, tailoring on-demand resonant BSW confined within the nanocavity.
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8
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Bhatnagar M, Gardella M, Giordano MC, Chowdhury D, Mennucci C, Mazzanti A, Valle GD, Martella C, Tummala P, Lamperti A, Molle A, Buatier de Mongeot F. Broadband and Tunable Light Harvesting in Nanorippled MoS 2 Ultrathin Films. ACS Appl Mater Interfaces 2021; 13:13508-13516. [PMID: 33687194 PMCID: PMC8041252 DOI: 10.1021/acsami.0c20387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 02/22/2021] [Indexed: 05/19/2023]
Abstract
Nanofabrication of flat optic silica gratings conformally layered with two-dimensional (2D) MoS2 is demonstrated over large area (cm2), achieving a strong amplification of the photon absorption in the active 2D layer. The anisotropic subwavelength silica gratings induce a highly ordered periodic modulation of the MoS2 layer, promoting the excitation of Guided Mode Anomalies (GMA) at the interfaces of the 2D layer. We show the capability to achieve a broadband tuning of these lattice modes from the visible (VIS) to the near-infrared (NIR) by simply tailoring the illumination conditions and/or the period of the lattice. Remarkably, we demonstrate the possibility to strongly confine resonant and nonresonant light into the 2D MoS2 layers via GMA excitation, leading to a strong absorption enhancement as high as 240% relative to a flat continuous MoS2 film. Due to their broadband and tunable photon harvesting capabilities, these large area 2D MoS2 metastructures represent an ideal scalable platform for new generation devices in nanophotonics, photo- detection and -conversion, and quantum technologies.
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Affiliation(s)
- Mukul Bhatnagar
- Dipartimento
di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Matteo Gardella
- Dipartimento
di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | | | - Debasree Chowdhury
- Dipartimento
di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Carlo Mennucci
- Dipartimento
di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Andrea Mazzanti
- Dipartimento
di Fisica and IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci, 32-20133 Milano, Italy
| | - Giuseppe Della Valle
- Dipartimento
di Fisica and IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci, 32-20133 Milano, Italy
- (G.D.V.)
| | - Christian Martella
- CNR-IMM
Unit of Agrate Brianza, via C. Olivetti 2, Agrate Brianza, I-20864, Italy
| | - Pinakapani Tummala
- CNR-IMM
Unit of Agrate Brianza, via C. Olivetti 2, Agrate Brianza, I-20864, Italy
| | - Alessio Lamperti
- CNR-IMM
Unit of Agrate Brianza, via C. Olivetti 2, Agrate Brianza, I-20864, Italy
| | - Alessandro Molle
- CNR-IMM
Unit of Agrate Brianza, via C. Olivetti 2, Agrate Brianza, I-20864, Italy
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9
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Bhatnagar M, Giordano MC, Mennucci C, Chowdhury D, Mazzanti A, Della Valle G, Martella C, Tummala P, Lamperti A, Molle A, Buatier de Mongeot F. Ultra-broadband photon harvesting in large-area few-layer MoS 2 nanostripe gratings. Nanoscale 2020; 12:24385-24393. [PMID: 33320146 DOI: 10.1039/d0nr06744j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Flat optics nanoarrays based on few-layer MoS2 are homogeneously fabricated over large-area (cm2) transparent templates, demonstrating effective tailoring of the photon absorption in two-dimensional (2D) transition-metal dichalcogenide (TMD) layers. The subwavelength subtractive re-shaping of the few-layer MoS2 film into a one-dimensional (1D) nanostripe array results in a pronounced photonic anomaly, tunable in a broadband spectral range by simply changing the illumination conditions (or the lattice periodicity). This scheme promotes efficient coupling of light to the 2D TMD layers via resonant interaction between the MoS2 excitons and the photonic lattice, with subsequent enhancement of absorption exceeding 400% relative to the flat layer. In parallel, an ultra-broadband absorption amplification in the whole visible spectrum is achieved, thanks to the non-resonant excitation of substrate guided modes promoted by MoS2 nanoarrays. These results highlight the potential of nanoscale re-shaped 2D TMD layers for large-area photon harvesting in layered nanophotonics, quantum technologies and new-generation photovoltaics.
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Affiliation(s)
- Mukul Bhatnagar
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy.
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10
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Giordano MC, Baumgaertl K, Escobar Steinvall S, Gay J, Vuichard M, Fontcuberta I Morral A, Grundler D. Plasma-Enhanced Atomic Layer Deposition of Nickel Nanotubes with Low Resistivity and Coherent Magnetization Dynamics for 3D Spintronics. ACS Appl Mater Interfaces 2020; 12:40443-40452. [PMID: 32805802 DOI: 10.1021/acsami.0c06879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We report plasma-enhanced atomic layer deposition (ALD) to prepare conformal nickel thin films and nanotubes using nickelocene as a precursor, water as the oxidant agent, and an in-cycle plasma-enhanced reduction step with hydrogen. The optimized ALD pulse sequence, combined with a post-processing annealing treatment, allowed us to prepare 30 nm-thick metallic Ni layers with a resistivity of 8 μΩ cm at room temperature and good conformality both on the planar substrates and nanotemplates. Thus, we fabricated several micrometers-long nickel nanotubes with diameters ranging from 120 to 330 nm. We report the correlation between ALD growth and functional properties of individual Ni nanotubes characterized in terms of magnetotransport and the confinement of spin-wave modes. The findings offer novel perspectives for Ni-based spintronics and magnonic devices operated in the GHz frequency regime with 3D device architectures.
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Affiliation(s)
| | | | - S Escobar Steinvall
- Laboratory of Semiconductor Materials, Institute of Materials, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | | | | | - A Fontcuberta I Morral
- Laboratory of Semiconductor Materials, Institute of Materials, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
- Institute of Physics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - D Grundler
- Institute of Microengineering (IMT), School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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11
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Barelli M, Mazzanti A, Giordano MC, Della Valle G, Buatier de Mongeot F. Color Routing via Cross-Polarized Detuned Plasmonic Nanoantennas in Large-Area Metasurfaces. Nano Lett 2020; 20:4121-4128. [PMID: 32401524 PMCID: PMC7735747 DOI: 10.1021/acs.nanolett.9b05276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 05/03/2020] [Indexed: 05/29/2023]
Abstract
Bidirectional nanoantennas are of key relevance for advanced functionalities to be implemented at the nanoscale and, in particular, for color routing in an ultracompact flat-optics configuration. Here we demonstrate a novel approach avoiding complex collective geometries and/or restrictive morphological parameters based on cross-polarized detuned plasmonic nanoantennas in a uniaxial (quasi-1D) bimetallic configuration. The nanofabrication of such a flat-optics system is controlled over a large area (cm2) by a novel self-organized technique exploiting ion-induced nanoscale wrinkling instability on glass templates to engineer tilted bimetallic nanostrip dimers. These nanoantennas feature broadband color routing with superior light scattering directivity figures, which are well described by numerical simulations and turn out to be competitive with the response of lithographic nanoantennas. These results demonstrate that our large-area self-organized metasurfaces can be implemented in real-world applications of flat-optics color routing from telecom photonics to optical nanosensing.
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Affiliation(s)
- Matteo Barelli
- Dipartimento
di Fisica, Università di Genova, Via Dodecaneso 33, I-16146 Genova, Italy
| | - Andrea Mazzanti
- Dipartimento
di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | | | - Giuseppe Della Valle
- Dipartimento
di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
- IFN-CNR, Piazza L. da Vinci 32, I-20133 Milano, Italy
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12
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Giordano MC, Tzschoppe M, Barelli M, Vogt J, Huck C, Canepa F, Pucci A, Buatier de Mongeot F. Self-Organized Nanorod Arrays for Large-Area Surface-Enhanced Infrared Absorption. ACS Appl Mater Interfaces 2020; 12:11155-11162. [PMID: 32049480 DOI: 10.1021/acsami.9b19719] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Capabilities of highly sensitive surface-enhanced infrared absorption (SEIRA) spectroscopy are demonstrated by exploiting large-area templates (cm2) based on self-organized (SO) nanorod antennas. We engineered highly dense arrays of gold nanorod antennas featuring polarization-sensitive localized plasmon resonances, tunable over a broadband near- and mid-infrared (IR) spectrum, in overlap with the so-called "functional group" window. We demonstrate polarization-sensitive SEIRA activity, homogeneous over macroscopic areas and stable in time, by exploiting prototype self-assembled monolayers of IR-active octadecanthiol (ODT) molecules. The strong coupling between the plasmonic excitation and molecular stretching modes gives rise to characteristic Fano resonances in SEIRA. The SO engineering of the active hotspots in the arrays allows us to achieve signal amplitude improved up to 5.7%. This figure is competitive to the response of lithographic nanoantennas and is stable when the optical excitation spot varies from the micro- to macroscale, thus enabling highly sensitive SEIRA spectroscopy with cost-effective nanosensor devices.
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Affiliation(s)
- M C Giordano
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - M Tzschoppe
- Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
| | - M Barelli
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - J Vogt
- Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
| | - C Huck
- Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
| | - F Canepa
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - A Pucci
- Kirchhoff Institute for Physics, University of Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
| | - F Buatier de Mongeot
- Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
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Mennucci C, Del Sorbo S, Pirotta S, Galli M, Andreani LC, Martella C, Giordano MC, Buatier de Mongeot F. Light scattering properties of self-organized nanostructured substrates for thin-film solar cells. Nanotechnology 2018; 29:355301. [PMID: 29856732 DOI: 10.1088/1361-6528/aac9ac] [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] [Indexed: 05/13/2023]
Abstract
We investigate the scattering properties of novel kinds of nano-textured substrates, fabricated in a self-organized fashion by defocused ion beam sputtering. These substrates provide strong and broadband scattering of light and can be useful for applications in thin-film solar cells. In particular, we characterize the transmitted light in terms of haze and angle-resolved scattering, and we compare our results with those obtained for the commonly employed Asahi-U texture. The results indicate that the novel substrate has better scattering properties compared to reference Asahi-U substrates. We observe super-Lambertian light scattering behavior in selected spectral and angular regions due to the peculiar morphology of the nano-textured interface, which combines high aspect ratio pseudo random structures with a one-dimensional periodic pattern. The enhancement of light absorption observed in a prototype thin film semiconductor absorber grown on nano-textured glass with respect to an Asahi-U substrate further confirms the superior light trapping properties of the novel substrate.
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Affiliation(s)
- C Mennucci
- Department of Physics, University of Genova, Via Dodecaneso 33, I-16146 Genova, Italy
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Giordano MC, de Mongeot FB. Anisotropic Nanoscale Wrinkling in Solid-State Substrates. Adv Mater 2018; 30:e1801840. [PMID: 29882306 DOI: 10.1002/adma.201801840] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/26/2018] [Indexed: 06/08/2023]
Abstract
Pattern formation induced by wrinkling is a very common phenomenon exhibited in soft-matter substrates. In all these systems, wrinkles develop in the presence of compressively stressed thin films lying on compliant substrates. Here, the controlled growth of self-organized nanopatterns exploiting a wrinkling instability on a solid-state substrate is demonstrated. Soda-lime glasses are modified in the surface layers by a defocused ion beam, which triggers the formation of a compressively stressed surface layer deprived of alkali ions. When the substrate is heated up near its glass transition temperature, the wrinkling instability boosts the growth rate of the pattern by about two orders of magnitude. High-aspect-ratio anisotropic ripples bound by faceted ridges are thus formed, which represent an optimal template for guiding the growth of large-area arrays of functional nanostructures. The engineering over large square centimeter areas of quasi-1D arrays of Au nanostripe dimers endowed with tunable plasmonic response, strong optical dichroism, and high electrical conductivity is demonstrated. These peculiar functionalities allow these large-area substrates to be exploited as active metamaterials in nanophotonics, biosensing, and optoelectronics.
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Mitrofanov O, Viti L, Dardanis E, Giordano MC, Ercolani D, Politano A, Sorba L, Vitiello MS. Near-field terahertz probes with room-temperature nanodetectors for subwavelength resolution imaging. Sci Rep 2017; 7:44240. [PMID: 28287123 PMCID: PMC5347152 DOI: 10.1038/srep44240] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [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: 10/24/2016] [Accepted: 02/06/2017] [Indexed: 11/08/2022] Open
Abstract
Near-field imaging with terahertz (THz) waves is emerging as a powerful technique for fundamental research in photonics and across physical and life sciences. Spatial resolution beyond the diffraction limit can be achieved by collecting THz waves from an object through a small aperture placed in the near-field. However, light transmission through a sub-wavelength size aperture is fundamentally limited by the wave nature of light. Here, we conceive a novel architecture that exploits inherently strong evanescent THz field arising within the aperture to mitigate the problem of vanishing transmission. The sub-wavelength aperture is originally coupled to asymmetric electrodes, which activate the thermo-electric THz detection mechanism in a transistor channel made of flakes of black-phosphorus or InAs nanowires. The proposed novel THz near-field probes enable room-temperature sub-wavelength resolution coherent imaging with a 3.4 THz quantum cascade laser, paving the way to compact and versatile THz imaging systems and promising to bridge the gap in spatial resolution from the nanoscale to the diffraction limit.
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Affiliation(s)
- Oleg Mitrofanov
- University College London, Electronic and Electrical Engineering, London, WC1E 7JE, UK
| | - Leonardo Viti
- NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Enrico Dardanis
- NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Maria Caterina Giordano
- NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Daniele Ercolani
- NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Antonio Politano
- Università degli Studi della Calabria, Dipartimento di Fisica, via Ponte Bucci, 87036 Rende (CS), Italy
| | - Lucia Sorba
- NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Miriam S. Vitiello
- NEST, Istituto Nanoscienze – CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
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Giordano MC, Repetto D, Mennucci C, Carrara A, Mongeot FBD. Template-assisted growth of transparent plasmonic nanowire electrodes. Nanotechnology 2016; 27:495201. [PMID: 27827344 DOI: 10.1088/0957-4484/27/49/495201] [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: 05/13/2023]
Abstract
Self-organized nanowire arrays are confined by glancing-angle Au deposition on nanopatterned glass templates prepared by ion beam sputtering. The semi-transparent 1D nanowire arrays are extended over large cm2 areas and are endowed with excellent electrical conductivity competitive with the best transparent conductive oxides (sheet resistance in the range of 5-20 Ohm sq-1). In addition, the nanowires support localized surface plasmon (LSP) resonances, which are easily tunable into the visible and near infrared spectrum and are selectively excited with incident light polarized perpendicularly to the wires. Such substrates, thus, behave as multifunctional nanoelectrodes, which combine good optoelectronic performance with dichroic plasmonic excitation. The electrical percolation process of the Au nanoelectrodes was monitored in situ during growth at glancing angle, both on flat and nanopatterned glass templates. In the first case, we observed a universal scaling of the differential percolation rate, independently of the glancing deposition angle, while deviations from the universal scaling were observed when Au was confined on nanopatterned templates. In the latter case, the pronounced shadowing effect promotes the growth of locally connected 1D Au nanosticks on the 'illuminated' ripple ridges, thus, introducing strong anisotropies with respect to the case of a 2D percolating network.
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Pedraz P, Casado S, Rodriguez V, Giordano MC, Mongeot FBD, Ayuso-Sacido A, Gnecco E. Adhesion modification of neural stem cells induced by nanoscale ripple patterns. Nanotechnology 2016; 27:125301. [PMID: 26889870 DOI: 10.1088/0957-4484/27/12/125301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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
We have studied the influence of anisotropic nanopatterns (ripples) on the adhesion and morphology of mouse neural stem cells (C17.2) on glass substrates using cell viability assay, optical microscopy and atomic force microscopy. The ripples were produced by defocused ion beam sputtering with inert Ar ions, which physically remove atoms from the surface at the energy of 800 eV. The ripple periodicity (∼200 nm) is comparable to the thickness of the cytoplasmatic microspikes (filopodia) which link the stem cells to the substrate. All methods show that the cell adhesion is significantly lowered compared to the same type of cells on flat glass surfaces. Furthermore, the AFM analysis reveals that the filopodia tend to be trapped parallel or perpendicular to the ripples, which limits the spreading of the stem cell on the rippled substrate. This opens the perspective of controlling the micro-adhesion of stem cells and the orientation of their filopodia by tuning the anisotropic substrate morphology without chemical reactions occurring at the surface.
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Affiliation(s)
- P Pedraz
- IMDEA Nanociencia, Campus Universitario de Cantoblanco, Calle Faraday 9, E-28049 Madrid, Spain
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Giordano MC, Foti A, Messina E, Gucciardi PG, Comoretto D, Buatier de Mongeot F. SERS Amplification from Self-Organized Arrays of Plasmonic Nanocrescents. ACS Appl Mater Interfaces 2016; 8:6629-38. [PMID: 26824254 DOI: 10.1021/acsami.5b11843] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We report on the surface-enhanced Raman scattering (SERS) efficiency of self-organized arrays of Au nanocrescents confined on monolayers of polystyrene nanospheres. A dichroic SERS emission in the visible spectrum is observed due to the selective excitation of a localized surface plasmon (LSP) resonance along the "short axis" of the Au nanocrescents. Under these conditions SERS signal amplifications in the range of 10(3) have been observed with respect to a flat reference Au film. The far field and near field plasmonic response of Au nanocrescent arrays have been investigated as a function of the metal dose deposited onto the polymeric spheres. In this way, we show the possibility of simply tailoring the SERS emission by engineering the morphology of the plasmonic nanocrescents. We highlight the SERS activity of chains of satellite nanoclusters that decorate the border of each connected crescent and sustain isotropic high energy LSP resonances in the visible spectrum.
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Affiliation(s)
| | - Antonino Foti
- CNR IPCF Institute for Chemical and Physical processes , Viale F. Stagno D'Alcontres 37, I-98156 Messina, Italy
- School of Doctorate in Physics, University of Messina , Viale F. Stagno D'Alcontres 31, I-98156 Messina, Italy
| | - Elena Messina
- CNR IPCF Institute for Chemical and Physical processes , Viale F. Stagno D'Alcontres 37, I-98156 Messina, Italy
| | - Pietro Giuseppe Gucciardi
- CNR IPCF Institute for Chemical and Physical processes , Viale F. Stagno D'Alcontres 37, I-98156 Messina, Italy
| | - Davide Comoretto
- Department of Chemistry and Industrial Chemistry, University of Genova Via Dodecaneso 31, 16146, Genova, Italy
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Gnecco E, Nita P, Casado S, Pimentel C, Mougin K, Giordano MC, Repetto D, de Mongeot FB. Channeling motion of gold nanospheres on a rippled glassed surface. Nanotechnology 2014; 25:485302. [PMID: 25396680 DOI: 10.1088/0957-4484/25/48/485302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Gold nanospheres have been manipulated by atomic force microscopy on a rippled glass surface produced by ion beam sputtering and coated with an ultrathin (10 nm thick) graphitic layer. This substrate is characterized by irregular wavy grooves running parallel to a preferential direction. Measurements in ambient conditions show that the motion of the nanoparticles is confined to single grooves ('channels'), along which the particles move till they are trapped by local bottlenecks. At this point, the particles cross the ripple pattern in a series of consecutive jumps and continue their longitudinal motion along a different channel. Moreover, due to the asymmetric shape of the ripple profiles, the jumps occur in the direction of minimum slope, resembling a ratchet mechanism. Our results are discussed, extending a collisional model, which was recently developed for the manipulation of nanospheres on flat surfaces, to the specific geometry of this problem.
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Affiliation(s)
- Enrico Gnecco
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia), Campus Universitario de Cantoblanco, Calle Faraday 9, 28049 Madrid, Spain
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Aas LMS, Kildemo M, Martella C, Giordano MC, Chiappe D, Buatier de Mongeot F. Optical properties of biaxial nanopatterned gold plasmonic nanowired grid polarizer. Opt Express 2013; 21:30918-31. [PMID: 24514665 DOI: 10.1364/oe.21.030918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Gold nanoparticles deposited on self-organized nano-ripple quartz substrates have been studied by spectroscopic Mueller matrix ellipsometry. The surface was found to have biaxial anisotropic optical properties. For electric field components normal to the ripples the periodic and disconnected nature of the in plane nanowires gives rise to an optical response dominated by the localized plasmon resonance. In the direction parallel to the ripples the gold nanoparticles are aligned closely leading to localized plasmon resonances in the infrared. As Au was deposited at an angle oblique to the surface normal, the gold nanoparticles were formed on the side of the ripples facing the incoming evaporation flux. This makes the gold particles slightly inclined, correspondingly the principal coordinate system of the biaxial dielectric tensor results tilted. The anisotropic plasmonic optical response results in a strong polarizing effect, making it suitable as a plasmonic nanowired grid polarizer.
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Buccheri G, Ferrigno D, Giordano MC. Weekly chemotherapy with cisplatin and paclitaxel in advanced NSClC: a phase II study. Monaldi Arch Chest Dis 2006; 65:75-81. [PMID: 16913577 DOI: 10.4081/monaldi.2006.568] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND This phase II study was designed to assess the activity and toxicity of administration of the cisplatin/paclitaxel combination in advanced non-small cell lung cancer (NSCLC). METHODS Eligibility criteria included: age up to 70 years, pathological diagnosis of NSCLC, inoperable disease or post-operative tumour recurrence, performance status < or =2, no severe co-morbidity, no previous chemotherapy, and informed consent. Treatment consisted of intravenous infusion of cisplatin, 25 mg/m2, and paclitaxel, 80 mg/m2, every week. Chemotherapy was continued until completion of a 22-week treatment plan, disease progression, persistent toxicity, or patient refusal. RESULTS Forty-nine patients entered the study. They received a median of 14 cycles (range 0-22). For both drugs, the median dose-intensity was 75% of projected. Toxicity was generally acceptable, and never life threatening. Alopecia was the most common side effect, followed by anemia, leukopenia, and nausea/vomiting. Twenty patients responded (40.8% response rate), with three complete, pathologically documented responses. The estimated median time to progression was 35 weeks (95% CI: 29-41); the median survival time was 56 weeks (95% CI: not calculable), with a 2-year survival rate of 46.1%. CONCLUSIONS When given on a weekly basis, the cisplatin/paclitaxel combination is well tolerated, active, and associated to remarkably long survivals.
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Affiliation(s)
- G Buccheri
- Cuneo Lung Cancer Study Group, Struttura Complessa di Pneumologia, Ospedale A. Carle, Azienda Ospedaliera S. Croce e Carle, Cuneo, 1-12100, Italy.
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Moreschini O, Greggi G, Giordano MC, Nocente M, Margheritini F. Postoperative physiopathological analysis of inflammatory parameters in patients undergoing hip or knee arthroplasty. Int J Tissue React 2002; 23:151-4. [PMID: 11771779] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Infection after total hip or knee arthroplasty is a major concern for the orthopedic surgeon. Because postoperative recovery in patients undergoing hip or knee replacement is always characterized by a shift in basal laboratory parameters, the value of the routine use of these parameters in the detection of this major complication is controversial. The aim of this study was to evaluate the physiological behavior of these parameters, the most reliable of which are C-reactive protein (CRP), erythrocyte sedimentation rate (ESR) and white blood cell count (WBC). The pattern of these parameters was observed for 60 days after surgery in 74 patients (48 males and 26 females) who underwent total hip or total knee arthroplasty. Mean age was 65.4 years. ESR reached a peak on day 5 and then decreased as much as 3-fold by day 60. CRP displayed even greater sensitivity with a peak level on day 3 followed by a rapid return to basal levels. WBC also peaked on day 1. No significant differences were found between total hip arthroplasty and total knee arthroplasty. Observation of the pattern of these parameters identifies any nonphysiological modifications and enables suitable measures to be adopted.
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Affiliation(s)
- O Moreschini
- Orthopedic Department, University of Rome La Sapienza, Italy
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Preite R, Belli PG, Giordano MC, Iandolo C, Laurenza F. A comparative analysis of the different fixation devices used in pertrochanteric fractures. Chir Organi Mov 2000; 85:225-33. [PMID: 11569085] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The effectiveness of four different fixation devices in the treatment of pertrochanteric fractures of the femur were evaluated in 147 patients. Based on long-term clinical and radiographic evaluation of cases, it is observed that although the screw plates, Ender nails, and gamma nail provide satisfactory results in the treatment of such fractures, each of these with its own indications, the more recent PFN nail, because of its features, seems to adapt best to the needs of the orthopaedist.
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Affiliation(s)
- R Preite
- Divisione Ortopedica e Traumatologia, Complesso Ospedaliero San Giovanni Addolorata, Roma
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