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1.
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9 p, 2.8 MB |
Atomically sharp lateral superlattice heterojunctions built-in nitrogen-doped nanoporous graphene
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Tenorio, María José (Institut Català de Nanociència i Nanotecnologia) ;
Moreno, Cesar (Institut Català de Nanociència i Nanotecnologia) ;
Febrer Calabozo, Pol (Institut Català de Nanociència i Nanotecnologia) ;
Castro-Esteban, Jesús (Universidade de Santiago de Compostela. Departamento de Química Orgánica) ;
Ordejon, Pablo (Institut Català de Nanociència i Nanotecnologia) ;
Peña, Diego (Universidade de Santiago de Compostela. Departamento de Química Orgánica) ;
Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia)
Nanometer scale lateral heterostructures with atomically sharp band discontinuities can be conceived as the 2D analogues of vertical Van der Waals heterostructures, where pristine properties of each component coexist with interfacial phenomena that result in a variety of exotic quantum phenomena. [...]
2022 -  10.1002/adma.202110099
Advanced materials, Vol. 34, issue 20 (May 2022) , art. 2110099
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2.
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212 p, 13.4 MB |
On-surface synthesis of nitrogen-doped graphene-based nanoarchitectures : 0D nanographenes, 1D nanoribbons and 2D nanoporous graphene
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Tenorio Tuñas, María ;
Moreno, César, dir. ;
Mugarza, Aitor, dir. ;
González Silveira, Marta, dir.
El grafè monocapa ha demostrat posseir destacades propietats físiques, que el converteixen en un dels nanomaterials estrella del present i del futur. No obstant això, algunes propietats absents al grafè limiten les seves aplicacions, com la manca de banda prohibida, rellevant per a l'electrònica i l'òptica; la reactivitat selectiva, crucial per a la detecció, o la permeabilitat, crítica per al tamisat. [...]
El grafeno monocapa ha demostrado poseer destacadas propiedades físicas, que lo convierten en uno de los nanomateriales estrella del presente y del futuro. Sin embargo, algunas propiedades ausentes en el grafeno limitan sus aplicaciones, como la falta de banda prohibida, relevante para la electrónica y la óptica; la reactividad selectiva, crucial para la detección, o la permeabilidad, crítica para el tamizado. [...]
Monolayer graphene has shown to possess distinguished physical properties, which make it one of the starring nanomaterials of the present and of the future. However, some missing properties in graphene limit its applications, such as the lack of band gap, relevant for electronics and optics; the selective reactivity, crucial for sensing, or the permeability, critical for sieving. [...]
2022
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3.
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15 p, 1.5 MB |
Room-temperature tunnel magnetoresistance across biomolecular tunnel junctions based on ferritin
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Karuppannan, Senthil kumar (National University of Singapore. Department of Chemistry) ;
Pasula, Rupali Reddy (Nanyang Technological University. School of Chemical and Biomedical Engineering) ;
Herng, Tun Seng (National University of Singapore. Department of Materials Science and Engineering) ;
Ding, Jun (National University of Singapore. Department of Materials Science and Engineering) ;
Chi, Xiao (Singapore Synchrotron Light Source) ;
Del Barco, Enrique (University of Central Florida. Department of Physics) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Yu, Xiaojiang (Singapore Synchrotron Light Source) ;
Yakovlev, Nikolai (Institute of Materials Research and Engineering (Singapur, Singapur)) ;
Lim, Sierin (Nanyang Technological University. School of Chemical and Biomedical Engineering) ;
Nijhuis, Christian A. (University of Twente. Department of Molecules and Materials)
We report exceptionally large tunnel magnetoresistance (TMR) for biomolecular tunnel junctions based on ferritins immobilized between Ni and EGaIn electrodes. Ferritin stores iron in the form of ferrihydrite nanoparticles (NPs) and fulfills the following roles: (a) it dictates the tunnel barrier, (b) it magnetically decouples the NPs from the ferromagnetic (FM) electrode, (c) it stabilizes the NPs, and (d) it acts as a spin filter reducing the complexity of the tunnel junctions since only one FM electrode is required. [...]
2021 - 10.1088/2515-7639/abfa79
JPhys materials, Vol. 4, issue 3 (April 2021) , art. 035003
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4.
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267 p, 13.1 MB |
Descripción a Nivel Molecular de Propiedades Estructurales y Electrónicas en Interfases Orgánicas
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Palacios Rivera, Percy Rogger ;
Barrena, Esther, dir. ;
Ocal García, Carmen, dir. ;
Rodríguez Viejo, Javier, dir.
Les propietats estructurals i electròniques de la interfase orgànic-orgànic són de vital importància per al funcionament eficient de OLEDs i OPVs. Un dels reptes per a l'optimització de l'energia fotovoltaica orgànica, és conèixer les condicions a escala molecular d'interfases que afavoreixen la dissociació del excitón en la interfase orgànica-orgànica (donor(D)/acceptor(A)) i que permeten un posterior eficient transport de càrrega cap als elèctrodes. [...]
Las propiedades estructurales y electrónicas de la interfase orgánico-orgánico son de vital importancia para el funcionamiento eficiente de OLEDs y OPVs. Uno de los retos para optimizar la energía fotovoltaica orgánica, es conocer las condiciones a escala molecular de interfases que favorecen la disociación del excitón en la interfase orgánica-orgánica (donor(D)/aceptor(A)) que permiten un posterior eficiente transporte de carga hacia los electrodos. [...]
The structural and electronic properties of the organic-organic interface are of vital importance for the efficient operation of OLEDs and OPVs. One of the challenges for the optimization of organic photovoltaic energy is to know the molecular-scale conditions of the interfaces that favour the dissociation of the exciton in the organic- organic interface (donor (D) / acceptor (A)) and that allow a subsequent efficient charge transport to the electrodes. [...]
2021
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5.
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30 p, 2.2 MB |
Stabilizing edge fluorination in graphene nanoribbons
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Panighel, Mirco (Institut Català de Nanociència i Nanotecnologia) ;
Peña, Diego (Universidade de Santiago de Compostela. Departamento de Química Orgánica) ;
Brandimarte Mendonça, Pedro (Donostia International Physics Center) ;
Moreno, Cesar (Institut Català de Nanociència i Nanotecnologia) ;
Garcia-Lekue, Aran. (Ikerbasque) ;
Vilas-Varela, Manuel (Universidade de Santiago de Compostela. Departamento de Química Orgánica) ;
Rey, Dulce (Universidade de Santiago de Compostela. Departamento de Química Orgánica) ;
Sauthier, Guillaume (Institut Català de Nanociència i Nanotecnologia) ;
Ceballos, Gustavo (Institut Català de Nanociència i Nanotecnologia) ;
Peña, Diego (Universidade de Santiago de Compostela. Departamento de Química Orgánica) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia)
The on-surface synthesis of edge-functionalized graphene nanoribbons (GNRs) is challenged by the stability of the functional groups throughout the thermal reaction steps of the synthetic pathway. Edge fluorination is a particularly critical case in which the interaction with the catalytic substrate and intermediate products can induce the complete cleavage of the otherwise strong C-F bonds before the formation of the GNR. [...]
2020 - 10.1021/acsnano.0c01837
ACS nano, Vol. 14, issue 9 (Sep. 2020) , p. 11120-11129
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6.
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14 p, 2.3 MB |
Enhanced Magnetism through Oxygenation of FePc/Ag(110) Monolayer Phases
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Bartolome, Elena (Escola Universitària Salesiana de Sarrià) ;
Bartolomé, Juan (Instituto de Ciencia de Materiales de Aragón) ;
Sedona, Francesco (Università Degli Studi di Padova. Dipartimento di Scienze Chimiche) ;
Lobo-Checa, Jorge (Instituto de Ciencia de Materiales de Aragón) ;
Forrer, Daniel (Università Degli Studi di Padova. Dipartimento di Scienze Chimiche) ;
Herrero-Albillos, Julia (Centro Universitario de la Defensa) ;
Piantek, Marten (Instituto de Nanociencia de Aragón) ;
Herrero-Martín, Javier (ALBA Laboratori de Llum de Sincrotró) ;
Betto, Davide (European Synchrotron Radiation Facility) ;
Velez-Fort, Emilio (European Synchrotron Radiation Facility) ;
García, L. M. (Instituto de Ciencia de Materiales de Aragón) ;
Panighel, Mirco (TASC IOM-CNR) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Sambi, Mauro (Università Degli Studi di Padova. Dipartimento di Scienze Chimiche) ;
Bartolomé, Fernando (Instituto de Ciencia de Materiales de Aragón)
Iron phthalocyanines (FePc) adsorbed onto a Ag(110) substrate self-assemble into different monolayer phases going from rectangular to different oblique phases, with increasing molecular density. We have investigated the oxygen uptake capability of the different phases and their associated magneto-structural changes. [...]
2020 - 10.1021/acs.jpcc.0c01988
Journal of physical chemistry. C, Vol. 124, issue 25 (June 2020) , p. 13993-14006
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7.
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25 p, 4.2 MB |
Cx43 and Associated Cell Signaling Pathways Regulate Tunneling Nanotubes in Breast Cancer Cells
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Tishchenko, Alexander (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Azorín, Daniel D. (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Vidal-Brime, Laia (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
José Muñoz, María (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Jiménez Arenas, Pol (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Pearce, Christopher (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Girao, Henrique (University of Coimbra. Faculty of Medicine) ;
Ramón y Cajal, Santiago (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Aasen, Trond (Hospital Universitari Vall d'Hebron. Institut de Recerca) ;
Universitat Autònoma de Barcelona
Connexin 43 (Cx43) forms gap junctions that mediate the direct intercellular diffusion of ions and small molecules between adjacent cells. Cx43 displays both pro- and anti-tumorigenic properties, but the mechanisms underlying these characteristics are not fully understood. [...]
2020 - 10.3390/cancers12102798
Cancers, Vol. 12 Núm. 10 (2020) , p. 2798
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8.
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5 p, 1.1 MB |
Tunneling magnetoresistance phenomenon utilizing graphene magnet electrode
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Hashimoto, T. (Aoyama Gakuin University. Faculty of Science and Engineering) ;
Kamikawa, S. (Aoyama Gakuin University. Faculty of Science and Engineering) ;
Soriano, David (Institut Català de Nanociència i Nanotecnologia) ;
Pedersen, Jesper Goor (Institut Català de Nanociència i Nanotecnologia) ;
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia) ;
Haruyama, Junji (Aoyama Gakuin University. Faculty of Science and Engineering)
Using magnetic rare-metals for spintronic devices is facing serious problems for the environmental contamination and the limited material-resource. In contrast, by fabricating ferromagnetic graphene nanopore arrays (FGNPAs) consisting of honeycomb-like array of hexagonal nanopores with hydrogen-terminated zigzag-type atomic structure edges, we reported observation of polarized electron spins spontaneously driven from the pore edge states, resulting in rare-metal-free flat-energy-band ferromagnetism. [...]
2014 - 10.1063/1.4901279
Applied physics letters, Vol. 105, issue 18 (Nov. 2014) , art. 183111
2 documents
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9.
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11 p, 1.9 MB |
Spin tuning of electron-doped metal-phthalocyanine layers
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Stepanow, Sebastian (ETH Zürich. Department of Materials) ;
Lodi Rizzini, Alberto (Institut Català de Nanociència i Nanotecnologia) ;
Krull, Cornelius (Institut Català de Nanociència i Nanotecnologia) ;
Kavich, Jerald (Institut Català de Nanociència i Nanotecnologia) ;
Cezar, Julio C. (European Synchrotron Radiation Facility) ;
Yakhou-Harris, Flora (European Synchrotron Radiation Facility) ;
Sheverdyaeva, Polina M. (Consiglio Nazionale Delle Ricerche (Itàlia). Istituto di Struttura della Materia) ;
Moras, Paolo (Consiglio Nazionale Delle Ricerche (Itàlia). Istituto di Struttura della Materia) ;
Carbone, Carlo (Consiglio Nazionale Delle Ricerche (Itàlia). Istituto di Struttura della Materia) ;
Ceballos, Gustavo (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Gambardella, Pietro (Institut Català de Nanociència i Nanotecnologia)
The spin state of organic-based magnets at interfaces is to a great extent determined by the organic environment and the nature of the spin-carrying metal center, which is further subject to modifications by the adsorbate-substrate coupling. [...]
2014 - 10.1021/ja501204q
Journal of the American Chemical Society, Vol. 136, issue 14 (April 2014) , p. 5451-5459
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10.
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7 p, 1.4 MB |
Site-Resolved Contributions to the Magnetic-Anisotropy Energy and Complex Spin Structure of Fe/MgO Sandwiches
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Cuadrado, Ramón (Institut Català de Nanociència i Nanotecnologia) ;
Oroszlány, László (Eötvös University. Department of Physics of Complex Systems) ;
Deák, András (Budapest University of Technology and Economics. Department of Theoretical Physics) ;
Ostler, Thomas A. (Université de Liège. Department of Physics) ;
Meo, Andrea (University of York. Department of Physics) ;
Chepulskii, Roman V. (Samsung Electronics) ;
Apalkov, Dmytro (Samsung Electronics) ;
Evans, Richard F. L. (University of York. Department of Physics) ;
Szunyogh, László (Budapest University of Technology and Economics) ;
Chantrell, Roy W. (University of York. Department of Physics)
Fe/MgO-based magnetic tunnel junctions are among the most promising candidates for spintronic devices due to their high thermal stability and high tunneling magnetoresistance. Despite its apparent simplicity, the nature of the interactions between the Fe and MgO layers leads to complex finite-size effects and temperature-dependent magnetic properties which must be carefully controlled for practical applications. [...]
2018 - 10.1103/PhysRevApplied.9.054048
Physical review applied, Vol. 9, Issue 5 (May 2018) , art. 54048
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