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Sen S, Jana R, Bera S, Shyamal S, Sahu P, Datta A, Pradhan N. Epitaxial Orientation Angle Tuned Disk-on-Rod Nanoheterostructures for Boosting Charge Transfer. J Phys Chem Lett 2022; 13:3804-3811. [PMID: 35452244 DOI: 10.1021/acs.jpclett.2c00470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Controlling the compositions of Se(VI) and Te(VI) ions in a 2D disk on 1D structures of Sb(V) chalcogenides, disk-on-rod heterostructures having three different epitaxial angles with different surface facets are reported. Te injection temperature determined the composition, ensuring heterostructure formation with trigonal Sb2SexTe3-x disks on orthorhombic Sb2Se3 rods having orientation angles 180°, 135°, and 90°. The growth kinetics of disks connected at one/two heads of parent rods is manipulated using an Se precursor as a limiting reagent. Theoretical calculations established the energy minimization of different orientations, their possible formation, and suitability in energy transfer applications. Electrochemical measurements were also in agreement with theoretical calculations. Hence, this is a case study of advanced modular synthesis of disk-on-rod nanostructures, leading a step further in nanocrystal engineering for more desirable complex structures and their charge transfer property.
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Pina-Hernandez C, Koshelev A, Dhuey S, Sassolini S, Sainato M, Cabrini S, Munechika K. Nanoimprinted High-Refractive Index Active Photonic Nanostructures Based on Quantum Dots for Visible Light. Sci Rep 2017; 7:17645. [PMID: 29247228 PMCID: PMC5732276 DOI: 10.1038/s41598-017-17732-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 11/30/2017] [Indexed: 11/23/2022] Open
Abstract
A novel method to realizing printed active photonic devices was developed using nanoimprint lithography (NIL), combining a printable high-refractive index material and colloidal CdSe/CdS quantum dots (QDs) for applications in the visible region. Active media QDs were applied in two different ways: embedded inside a printable high-refractive index matrix to form an active printable hybrid nanocomposite, and used as a uniform coating on top of printed photonic devices. As a proof-of-demonstration for printed active photonic devices, two-dimensional (2-D) photonic crystals as well as 1D and 2D photonic nanocavities were successfully fabricated following a simple reverse-nanoimprint process. We observed enhanced photoluminescence from the 2D photonic crystal and the 1D nanocavities. Outstandingly, the process presented in this study is fully compatible with large-scale manufacturing where the patterning areas are only limited by the size of the corresponding mold. This work shows that the integration of active media and functional materials is a promising approach to the realization of integrated photonics for visible light using high throughput technologies. We believe that this work represents a powerful and cost-effective route for the development of numerous nanophotonic structures and devices that will lead to the emergence of new applications.
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Affiliation(s)
| | | | - Scott Dhuey
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Simone Sassolini
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Michela Sainato
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Stefano Cabrini
- The Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Keiko Munechika
- aBeam Technologies, 22290 Foothill Blvd, St. 2, Hayward, CA, 94541, USA.
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A room temperature continuous-wave nanolaser using colloidal quantum wells. Nat Commun 2017; 8:143. [PMID: 28747633 PMCID: PMC5529567 DOI: 10.1038/s41467-017-00198-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 06/07/2017] [Indexed: 11/24/2022] Open
Abstract
Colloidal semiconductor nanocrystals have emerged as promising active materials for solution-processable optoelectronic and light-emitting devices. In particular, the development of nanocrystal lasers is currently experiencing rapid progress. However, these lasers require large pump powers, and realizing an efficient low-power nanocrystal laser has remained a difficult challenge. Here, we demonstrate a nanolaser using colloidal nanocrystals that exhibits a threshold input power of less than 1 μW, a very low threshold for any laser using colloidal emitters. We use CdSe/CdS core-shell nanoplatelets, which are efficient nanocrystal emitters with the electronic structure of quantum wells, coupled to a photonic-crystal nanobeam cavity that attains high coupling efficiencies. The device achieves stable continuous-wave lasing at room temperature, which is essential for many photonic and optoelectronic applications. Our results show that colloidal nanocrystals are suitable for compact and efficient optoelectronic devices based on versatile and inexpensive solution-processable materials. Colloidal nanocrystals are a promising material for easy-to-fabricate nanolasers, but suffer from high threshold powers. Here, the authors combine colloidal quantum wells with a photonic-crystal cavity into a stable, continuous-wave room-temperature nanolaser with a threshold below one microwatt
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Chang H, Min K, Lee M, Kang M, Park Y, Cho KS, Roh YG, Hwang SW, Jeon H. Colloidal quantum dot lasers built on a passive two-dimensional photonic crystal backbone. NANOSCALE 2016; 8:6571-6576. [PMID: 26935411 DOI: 10.1039/c5nr08544f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the room-temperature lasing action from two-dimensional photonic crystal (PC) structures composed of a passive Si3N4 backbone with an over-coat of CdSe/CdS/ZnS colloidal quantum dots (CQDs) for optical gain. When optically excited, devices lased in dual PC band-edge modes, with the modal dominance governed by the thickness of the CQD over-layer. The demonstrated laser platform should have an impact on future photonic integrated circuits as the on-chip coupling between active and passive components is readily achievable.
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Affiliation(s)
- Hojun Chang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungtaek Min
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Myungjae Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Minsu Kang
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Yeonsang Park
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Kyung-Sang Cho
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Young-Geun Roh
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Sung Woo Hwang
- Samsung Advanced Institute of Technology, Suwon 11678, Republic of Korea
| | - Heonsu Jeon
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea. and Inter-university Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea and Department of Biophysics and Chemical Biology, Seoul National University, Seoul 08826, Republic of Korea
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5
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Gupta S, Waks E. Spontaneous emission enhancement and saturable absorption of colloidal quantum dots coupled to photonic crystal cavity. OPTICS EXPRESS 2013; 21:29612-29619. [PMID: 24514512 DOI: 10.1364/oe.21.029612] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We demonstrate spontaneous emission rate enhancement and saturable absorption of cadmium selenide colloidal quantum dots coupled to a nanobeam photonic crystal cavity. We perform time-resolved lifetime measurements and observe an average enhancement of 4.6 for the spontaneous emission rate of quantum dots located at the cavity as compared to those located on an unpatterned surface. We also demonstrate that the cavity linewidth narrows with increasing pump intensity due to quantum dot saturable absorption.
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Pisanello F, De Paolis R, Lorenzo D, Guardia P, Nitti S, Monti G, Fragouli D, Athanassiou A, Tarricone L, Manna L, De Vittorio M, Martiradonna L. GHz properties of magnetophoretically aligned iron-oxide nanoparticle doped polymers. ACS APPLIED MATERIALS & INTERFACES 2013; 5:2908-2914. [PMID: 23537058 DOI: 10.1021/am400239b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We show that assembled domains of magnetic iron-oxide nanoparticles (IONPs) are effective at increasing the dielectric permittivity of polydimethylsiloxane (PDMS) nanocomposites in the GHz frequency range. The assembly has been achieved by means of magnetophoretic transport and its efficacy, as well as the electromagnetic properties of the nanocomposite, has been found to depend on IONPs diameter. Remarkably, the dielectric permittivity increase has been obtained by keeping dielectric and magnetic losses very low, making us envision the suitability of nanocomposites based on aligned IONPs as substrates for radiofrequency applications.
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Affiliation(s)
- Ferruccio Pisanello
- Center for Biomolecular Nanotechnologies@UniLe, Istituto Italiano di Tecnologia, 73010 Arnesano (LE), Italy.
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Pisanello F, Leménager G, Martiradonna L, Carbone L, Vezzoli S, Desfonds P, Cozzoli PD, Hermier JP, Giacobino E, Cingolani R, De Vittorio M, Bramati A. Non-blinking single-photon generation with anisotropic colloidal nanocrystals: towards room-temperature, efficient, colloidal quantum sources. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:1974-80. [PMID: 23334905 DOI: 10.1002/adma.201203171] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 10/29/2012] [Indexed: 05/24/2023]
Abstract
Blinking and single-photon emission can be tailored in CdSe/CdS core/shell colloidal dot-in-rods. By increasing the shell thickness it is possible to obtain almost non-blinking nanocrystals, while the shell length can be used to control single-photon emission probability.
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Affiliation(s)
- Ferruccio Pisanello
- Istituto Italiano di Tecnologia (IIT), Center for Bio-Molecular Nanotechnologies, Arnesano (Lecce), Italy.
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Han J, Su H, Zhang W, Chen Y, Gu J, Zhang D, Moon WJ. Unique reflection properties of CdS/butterfly wings nanocomposites. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2012. [DOI: 10.1680/bbn.11.00001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Highly tunable optical properties are quite essential for future nanoscaled smart devices, which could be achieved on the hybrid photonic crystals (PhCs) that combine functional nanomaterials and PhC structures. However, related investigations are limited, since artificial PhCs lack either pattern variety or fabrication convenience. In this paper, the authors focus on exploring unusual optical properties by substituting the natural PhC structures in butterfly wings for artificial PhCs. Novel hybrid PhCs constructed by butterfly wings and the optical functional materials such as cadmium sulfide nanoparticles (nano-cadmium sulfide) are taken as examples. Owing to the conventionally unobtainable quasi-one dimensional PhC structures, nano-cadmium sulfide/wings (Euploea mulciber) display brilliant or gloomy colors depending on the observation directions. Such unique ‘on–off’ angle-dependent reflection properties are quite different from those of typical 1D PhCs and are intensively studied through comparison with the general reflection properties of nano-cadmium sulfide/wings' (Papilio paris) multilayer structures. Simulated reflection spectra match well with experimental results. Finally, a mechanism is established to illustrate the unique on–off angle-dependent reflection properties as well as provide a new understanding of the quasi-1D PhC structures. By introducing natural PhCs in this investigation, attractive properties that could inspire the design and application of hybrid PhCs are achieved.
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Affiliation(s)
- Jie Han
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China
| | - Huilan Su
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China
| | - Wang Zhang
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China
| | - Yu Chen
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China
| | - Jiajun Gu
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China
| | - Di Zhang
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, China
| | - Won-Jin Moon
- Korea Basic Science Institute, Gwangju Center, Yongbong-dong, Buk-gu, Gwangju, Republic of Korea
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Quan Q, Burgess IB, Tang SKY, Floyd DL, Loncar M. High-Q, low index-contrast polymeric photonic crystal nanobeam cavities. OPTICS EXPRESS 2011; 19:22191-7. [PMID: 22109061 DOI: 10.1364/oe.19.022191] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We present the design, fabrication and characterization of high-Q (Q=36,000) polymeric photonic crystal nanobeam cavities made of two polymers that have an ultra-low index contrast (ratio=1.15) and observed thermo-optical bistability at hundred microwatt power level. Due to the extended evanescent field and small mode volumes, polymeric nanobeam cavities are ideal platform for ultra-sensitive biochemical sensing. We demonstrate that these sensors have figures of merit (FOM=9190) two orders of magnitude greater than surface plasmon resonance based sensors, and outperform the commercial Biacore(TM) sensors. The demonstration of high-Q cavity in low-index-contrast polymers can open up versatile applications using a broad range of functional and flexible polymeric materials.
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Affiliation(s)
- Qimin Quan
- School of Engineering and Applied Science, Harvard University, Cambridge, MA 02138, USA
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Pisanello F, Qualtieri A, Stomeo T, Martiradonna L, Cingolani R, Bramati A, De Vittorio M. High-Purcell-factor dipolelike modes at visible wavelengths in H1 photonic crystal cavity. OPTICS LETTERS 2010; 35:1509-1511. [PMID: 20479791 DOI: 10.1364/ol.35.001509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The optimization of H1 photonic crystal cavities for applications in the visible spectral range is reported, with the goal to obtain a versatile photonic platform to explore strongly and weakly coupled systems. The resonators have been realized in silicon nitride and weakly coupled to both organic (fluorophores) and inorganic (colloidal nanocrystals) nanoparticles emitting in the visible spectral range. The theoretical Purcell factor of the two dipolelike modes in the defect has been increased up to approximately 90, and the experimental quality factor was measured to be approximately 750.
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Affiliation(s)
- Ferruccio Pisanello
- National Nanotechnology Laboratory, CNR/INFM, Scuola Superiore ISUFI, Università del Salento,16 Via Arnesano, 73100 Lecce, Italy.
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Shukla S, Baev A, Jee H, Hu R, Burzynski R, Yoon YK, Prasad PN. Large-area, near-infrared (IR) photonic crystals with colloidal gold nanoparticles embedding. ACS APPLIED MATERIALS & INTERFACES 2010; 2:1242-1246. [PMID: 20423143 DOI: 10.1021/am100109f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A polymeric composite material composed of colloidal gold nanoparticles (<10 nm) and SU8 has been utilized for the fabrication of large-area, high-definition photonic crystal. We have successfully fabricated near-infrared photonic crystal slabs from composite materials using a combination of multiple beam interference lithography and reactive ion etching processes. Doping of colloidal gold nanoparticles into the SU8 photopolymer results in a better definition of structural features and hence in the enhancement of the optical properties of the fabricated photonic crystals. A 2D air hole array of triangular symmetry with a hole-to-hole pitch of approximately 500 nm has been successfully fabricated in a large circular area of 1 cm diameter. Resonant features observed in reflectance spectra of our slabs are found to depend on the exposure time, and can be tuned over a range of near-infrared frequencies.
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Affiliation(s)
- Shobha Shukla
- Department of Electrical Engineering, State University of New York, Buffalo, NY 14260, USA
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Colloidal Inorganic Nanocrystal Based Nanocomposites: Functional Materials for Micro and Nanofabrication. MATERIALS 2010. [PMCID: PMC5513470 DOI: 10.3390/ma3021316] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The unique size- and shape-dependent electronic properties of nanocrystals (NCs) make them extremely attractive as novel structural building blocks for constructing a new generation of innovative materials and solid-state devices. Recent advances in material chemistry has allowed the synthesis of colloidal NCs with a wide range of compositions, with a precise control on size, shape and uniformity as well as specific surface chemistry. By incorporating such nanostructures in polymers, mesoscopic materials can be achieved and their properties engineered by choosing NCs differing in size and/or composition, properly tuning the interaction between NCs and surrounding environment. In this contribution, different approaches will be presented as effective opportunities for conveying colloidal NC properties to nanocomposite materials for micro and nanofabrication. Patterning of such nanocomposites either by conventional lithographic techniques and emerging patterning tools, such as ink jet printing and nanoimprint lithography, will be illustrated, pointing out their technological impact on developing new optoelectronic and sensing devices.
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Wakayama Y, Tandaechanurat A, Iwamoto S, Arakawa Y. Design of high-Q photonic crystal microcavities with a graded square lattice for application to quantum cascade lasers. OPTICS EXPRESS 2008; 16:21321-21332. [PMID: 19104562 DOI: 10.1364/oe.16.021321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A high-Q photonic crystal (PC) microcavity for TM-like modes, which can be applied to quantum cascade lasers (QCLs), was successfully designed in an air-hole based PC slab with semiconductor cladding layers. In spite of no photonic badgaps for TM-like modes in air-hole based PC slabs, cavity Q reached up to 2,200 by utilizing a graded square lattice PC structure. This is approximately 18 times higher than those previously reported for PC defect-mode microcavities for QCLs. This large improvement is attributed to a suppression of the coupling between the cavity mode and the leaky modes thanks to the dielectric perturbation in the graded structure. We also predicted a dramatic reduction of the threshold current in the designed cavity down to one-fifteenth of that of a conventional QCL, due to a decreased optical volume.
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Affiliation(s)
- Y Wakayama
- Institute of Nano Quantum Information Electronics, The University of Tokyo 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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Vignolini S, Riboli F, Intonti F, Belotti M, Gurioli M, Chen Y, Colocci M, Andreani LC, Wiersma DS. Local nanofluidic light sources in silicon photonic crystal microcavities. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 78:045603. [PMID: 18999486 DOI: 10.1103/physreve.78.045603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Indexed: 05/12/2023]
Abstract
We report on the realization of a rewritable and local source inside a Si-based photonic crystal microcavity by infiltrating a solution of colloidal PbS quantum dots inside a single pore of the structure. We show that the resulting spontaneous emission from the source is both spatially and spectrally redistributed due to the mode structure of the photonic crystal cavity. The coupling of the quantum dot emission to the cavity mode is analyzed by mapping the luminescence signal of the infiltrated solution with a scanning near-field optical microscope at room temperature. Spectral characterization and the mode profile are in good agreement with a three-dimensional numerical calculation of the system.
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Affiliation(s)
- Silvia Vignolini
- European Laboratory for Non-linear Spectroscopy (LENS), Via N. Carrara, 1, I-50019 Sesto Fiorentino Firenze, Italy.
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