1
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Foerster M, Figuera JDL, Palacio I, Aballe L. Preface to the twelfth international workshop on low energy microscopy and photoemission electron microscopy (LEEM/PEEM 12). Ultramicroscopy 2024; 258:113887. [PMID: 38065802 DOI: 10.1016/j.ultramic.2023.113887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2024]
Affiliation(s)
- Michael Foerster
- Alba Synchrotron Light Facility, 2-26 Carrer de la llum, 08290 Cerdanyola del Valles, Spain.
| | | | - Irene Palacio
- ESISNA Group, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Lucia Aballe
- Alba Synchrotron Light Facility, 2-26 Carrer de la llum, 08290 Cerdanyola del Valles, Spain
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2
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Beura SK, Panigrahi AR, Yadav P, Palacio I, Casero E, Quintana C, Singh J, Singh MK, Martín Gago JA, Singh SK. Harnessing two-dimensional nanomaterials for diagnosis and therapy in neurodegenerative diseases: Advances, challenges and prospects. Ageing Res Rev 2024; 94:102205. [PMID: 38272267 DOI: 10.1016/j.arr.2024.102205] [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] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/07/2023] [Accepted: 01/19/2024] [Indexed: 01/27/2024]
Abstract
Neurodegenerative diseases (NDDs) are specific brain disorders characterized by the progressive deterioration of different motor activities as well as several cognitive functions. Current conventional therapeutic options for NDDs are limited in addressing underlying causes, delivering drugs to specific neuronal targets, and promoting tissue repair following brain injury. Due to the paucity of plausible theranostic options for NDDs, nanobiotechnology has emerged as a promising field, offering an interdisciplinary approach to create nanomaterials with high diagnostic and therapeutic efficacy for these diseases. Recently, two-dimensional nanomaterials (2D-NMs) have gained significant attention in biomedical and pharmaceutical applications due to their precise drug-loading capabilities, controlled release mechanisms, enhanced stability, improved biodegradability, and reduced cell toxicity. Although various studies have explored the diagnostic and therapeutic potential of different nanomaterials in NDDs, there is a lack of comprehensive review addressing the theranostic applications of 2D-NMs in these neuronal disorders. Therefore, this concise review aims to provide a state-of-the-art understanding of the need for these ultrathin 2D-NMs and their potential applications in biosensing and bioimaging, targeted drug delivery, tissue engineering, and regenerative medicine for NDDs.
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Affiliation(s)
- Samir Kumar Beura
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, Punjab 151401, India
| | | | - Pooja Yadav
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, Punjab 151401, India
| | - Irene Palacio
- Instituto de Ciencia de Materiales de Madrid (CSIC). c/ Sor Juana Inés de la Cruz 3. Campus de Excelencia de la Universidad Autónoma de Madrid, 28049, Spain
| | - Elena Casero
- Departamento de Química Analítica y Análisis Instrumental. Facultad de Ciencias. Universidad Autónoma de Madrid. c/ Francisco Tomás y Valiente, Nº 7. Campus de Excelencia de la Universidad Autónoma de Madrid, 28049, Spain
| | - Carmen Quintana
- Departamento de Química Analítica y Análisis Instrumental. Facultad de Ciencias. Universidad Autónoma de Madrid. c/ Francisco Tomás y Valiente, Nº 7. Campus de Excelencia de la Universidad Autónoma de Madrid, 28049, Spain
| | - Jyoti Singh
- Department of Applied Agriculture, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, Punjab 151401, India
| | - Manoj Kumar Singh
- Department of Physics, School of Engineering and Technology, Central University of Haryana, Jant-Pali, Mahendragarh, Haryana 123031, India
| | - Jose A Martín Gago
- Instituto de Ciencia de Materiales de Madrid (CSIC). c/ Sor Juana Inés de la Cruz 3. Campus de Excelencia de la Universidad Autónoma de Madrid, 28049, Spain.
| | - Sunil Kumar Singh
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda, Punjab 151401, India.
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3
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Zamalloa-Serrano JM, Gómez-Fernández JM, Sánchez-Sánchez C, López MF, Martínez JI, Martín-Gago JÁ, Palacio I. Transition mechanism of the coverage-dependent polymorphism of self-assembled melamine nanostructures on Au(111). Phys Chem Chem Phys 2024; 26:3941-3949. [PMID: 38241018 DOI: 10.1039/d3cp05960j] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Molecular self-assembled films have recently attracted increasing attention within the field of nanotechnology as they offer a route to obtain new materials. However, careful selection of the molecular precursors and substrates, as well as exhaustive control of the system evolution is required to obtain the best possible outcome. The three-fold rotational symmetry of melamine molecules and their capability to form hydrogen bonds make them suitable candidates to synthesize this type of self-assembled network. In this work, we have studied the polymorphism of melamine nanostructures on Au(111) at room temperature. We find two coverage-dependent phases: a honeycomb structure (α-phase) for submonolayer coverage and a close-packed structure (β-phase) for full monolayer coverage. A combined scanning tunnel microscopy and density functional theory based-calculations study of the transition regime where both phases coexist allows describing the mechanism underlying this coverage driven phase transition in terms of the changes in the molecular lateral tension.
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Affiliation(s)
| | - José María Gómez-Fernández
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
| | - Carlos Sánchez-Sánchez
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
| | - María Francisca López
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
| | - José Ignacio Martínez
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
| | - José Ángel Martín-Gago
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
| | - Irene Palacio
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
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4
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Muñoz R, León-Boigues L, López-Elvira E, Munuera C, Vázquez L, Mompeán F, Martín-Gago JÁ, Palacio I, García-Hernández M. Acrylates Polymerization on Covalent Plasma-Assisted Functionalized Graphene: A Route to Synthesize Hybrid Functional Materials. ACS Appl Mater Interfaces 2023; 15:46171-46180. [PMID: 37738025 PMCID: PMC10561134 DOI: 10.1021/acsami.3c07200] [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] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/13/2023] [Indexed: 09/23/2023]
Abstract
The modification of the surface properties of graphene with polymers provides a method for expanding its scope into new applications as a hybrid material. Unfortunately, the chemical inertness of graphene hinders the covalent functionalization required to build them up. Developing new strategies to enhance the graphene chemical activity for efficient and stable functionalization, while preserving its electronic properties, is a major challenge. We here devise a covalent functionalization method that is clean, reproducible, scalable, and technologically relevant for the synthesis of a large-scale, substrate-supported graphene-polymer hybrid material. In a first step, hydrogen-assisted plasma activation of p-aminophenol (p-AP) linker molecules produces their stable and covalent attachment to large-area graphene. Second, an in situ radical polymerization reaction of 2-hydroxyethyl acrylate (HEA) is carried out on the functionalized surface, leading to a graphene-polymer hybrid functional material. The functionalization with a hydrophilic and soft polymer modifies the hydrophobicity of graphene and might enhance its biocompatibility. We have characterized these hybrid materials by atomic force microscopy (AFM), X-Ray photoelectron spectroscopy (XPS) and Raman spectroscopy and studied their electrical response, confirming that the graphene/p-AP/PHEA architecture is anchored covalently by the sp3 hybridization and controlled polymerization reaction on graphene, retaining its suitable electronic properties. Among all the possibilities, we assess the proof of concept of this graphene-based hybrid platform as a humidity sensor. An enhanced sensitivity is obtained in comparison with pristine graphene and related materials. This functional nanoarchitecture and the two-step strategy open up future potential applications in sensors, biomaterials, or biotechnology fields.
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Affiliation(s)
- Roberto Muñoz
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - Laia León-Boigues
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
- Universidad
Complutense de Madrid, Madrid E-28040, Spain
| | - Elena López-Elvira
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - Carmen Munuera
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - Luis Vázquez
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - Federico Mompeán
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - José Ángel Martín-Gago
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - Irene Palacio
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
| | - Mar García-Hernández
- Instituto
de Ciencia de Materiales de Madrid (ICMM), CSIC, Sor Juana Inés de la Cruz 3, Madrid E-28049, Spain
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5
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Palacio I, Moreno M, Náñez A, Purwidyantri A, Domingues T, Cabral PD, Borme J, Marciello M, Mendieta-Moreno JI, Torres-Vázquez B, Martínez JI, López MF, García-Hernández M, Vázquez L, Jelínek P, Alpuim P, Briones C, Martín-Gago JÁ. Attomolar detection of hepatitis C virus core protein powered by molecular antenna-like effect in a graphene field-effect aptasensor. Biosens Bioelectron 2023; 222:115006. [PMID: 36538869 DOI: 10.1016/j.bios.2022.115006] [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] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/23/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022]
Abstract
Biosensors based on graphene field-effect transistors have become a promising tool for detecting a broad range of analytes. However, their performance is substantially affected by the functionalization protocol. In this work, we use a controlled in-vacuum physical method for the covalent functionalization of graphene to construct ultrasensitive aptamer-based biosensors (aptasensors) able to detect hepatitis C virus core protein. These devices are highly specific and robust, achieving attomolar detection of the viral protein in human blood plasma. Such an improved sensitivity is rationalized by theoretical calculations showing that induced polarization at the graphene interface, caused by the proximity of covalently bound molecular probe, modulates the charge balance at the graphene/aptamer interface. This charge balance causes a net shift of the Dirac cone providing enhanced sensitivity for the attomolar detection of the target proteins. Such an unexpected effect paves the way for using this kind of graphene-based functionalized platforms for ultrasensitive and real-time diagnostics of different diseases.
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Affiliation(s)
- Irene Palacio
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de La Cruz 3, 28049, Madrid, Spain.
| | - Miguel Moreno
- Centro de Astrobiología (CAB, INTA-CSIC), 28850, Torrejón de Ardoz, Madrid, Spain
| | - Almudena Náñez
- Centro de Astrobiología (CAB, INTA-CSIC), 28850, Torrejón de Ardoz, Madrid, Spain
| | - Agnes Purwidyantri
- International Iberian Nanotechnology Laboratory (INL), 4715-330, Braga, Portugal
| | - Telma Domingues
- International Iberian Nanotechnology Laboratory (INL), 4715-330, Braga, Portugal; Centro de Física das Universidades do Minho e Porto (CF-UM-UP), Universidade do Minho, 4710-057, Braga, Portugal
| | - Patrícia D Cabral
- International Iberian Nanotechnology Laboratory (INL), 4715-330, Braga, Portugal; Centro de Física das Universidades do Minho e Porto (CF-UM-UP), Universidade do Minho, 4710-057, Braga, Portugal
| | - Jérôme Borme
- International Iberian Nanotechnology Laboratory (INL), 4715-330, Braga, Portugal
| | - Marzia Marciello
- Department of Chemistry in Pharmaceutical Sciences, Faculty of Pharmacy, Complutense University (UCM), Plaza Ramón y Cajal, 28040, Madrid, Spain
| | | | - Beatriz Torres-Vázquez
- Centro de Astrobiología (CAB, INTA-CSIC), 28850, Torrejón de Ardoz, Madrid, Spain; Universidad de Alcalá, Facultad de Medicina, Madrid, Spain
| | - José Ignacio Martínez
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de La Cruz 3, 28049, Madrid, Spain
| | - María Francisca López
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de La Cruz 3, 28049, Madrid, Spain
| | - Mar García-Hernández
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de La Cruz 3, 28049, Madrid, Spain
| | - Luis Vázquez
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de La Cruz 3, 28049, Madrid, Spain
| | - Pavel Jelínek
- Institute of Physics, Czech Academy of Sciences, 16200, Prague, Czech Republic
| | - Pedro Alpuim
- International Iberian Nanotechnology Laboratory (INL), 4715-330, Braga, Portugal; Centro de Física das Universidades do Minho e Porto (CF-UM-UP), Universidade do Minho, 4710-057, Braga, Portugal.
| | - Carlos Briones
- Centro de Astrobiología (CAB, INTA-CSIC), 28850, Torrejón de Ardoz, Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain.
| | - José Ángel Martín-Gago
- Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de La Cruz 3, 28049, Madrid, Spain.
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6
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Azpeitia J, Merino P, Ruiz-Gómez S, Foerster M, Aballe L, García-Hernández M, Martín-Gago JÁ, Palacio I. LiCl Photodissociation on Graphene: A Photochemical Approach to Lithium Intercalation. ACS Appl Mater Interfaces 2021; 13:42205-42211. [PMID: 34432411 PMCID: PMC8431332 DOI: 10.1021/acsami.1c11654] [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: 06/22/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
The interest in the research of the structural and electronic properties between graphene and lithium has bloomed since it has been proven that the use of graphene as an anode material in lithium-ion batteries ameliorates their performance and stability. Here, we investigate an alternative route to intercalate lithium underneath epitaxially grown graphene on iridium by means of photon irradiation. We grow thin films of LiCl on top of graphene on Ir(111) and irradiate the system with soft X-ray photons, which leads to a cascade of physicochemical reactions. Upon LiCl photodissociation, we find fast chlorine desorption and a complex sequence of lithium intercalation processes. First, it intercalates, forming a disordered structure between graphene and iridium. On increasing the irradiation time, an ordered Li(1 × 1) surface structure forms, which evolves upon extensive photon irradiation. For sufficiently long exposure times, lithium diffusion within the metal substrate is observed. Thermal annealing allows for efficient lithium desorption and full recovery of the pristine G/Ir(111) system. We follow in detail the photochemical processes using a multitechnique approach, which allows us to correlate the structural, chemical, and electronic properties for every step of the intercalation process of lithium underneath graphene.
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Affiliation(s)
- Jon Azpeitia
- Materials
Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz
3, 28049 Madrid, Spain
| | - Pablo Merino
- Materials
Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz
3, 28049 Madrid, Spain
- Instituto
de Física Fundamental, CSIC, Serrano 121, E28006 Madrid, Spain
| | - Sandra Ruiz-Gómez
- ALBA
Synchrotron, Carrer de
la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - Michael Foerster
- ALBA
Synchrotron, Carrer de
la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - Lucía Aballe
- ALBA
Synchrotron, Carrer de
la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - Mar García-Hernández
- Materials
Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz
3, 28049 Madrid, Spain
| | - José Ángel Martín-Gago
- Materials
Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz
3, 28049 Madrid, Spain
| | - Irene Palacio
- Materials
Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz
3, 28049 Madrid, Spain
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7
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Azpeitia J, Palacio I, Martínez J, Muñoz-Ochando I, Lauwaet K, Mompean F, Ellis G, García-Hernández M, Martín-Gago J, Munuera C, López M. Oxygen intercalation in PVD graphene grown on copper substrates: A decoupling approach. Appl Surf Sci 2020; 529:147100. [PMID: 33154607 PMCID: PMC7116314 DOI: 10.1016/j.apsusc.2020.147100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We investigate the intercalation process of oxygen in-between a PVD-grown graphene layer and different copper substrates as a methodology for reducing the substrate-layer interaction. This growth method leads to an extended defect-free graphene layer that strongly couples with the substrate. We have found, by means of X-ray photoelectron spectroscopy, that after oxygen exposure at different temperatures, ranging from 280 °C to 550 °C, oxygen intercalates at the interface of graphene grown on Cu foil at an optimal temperature of 500 °C. The low energy electron diffraction technique confirms the adsorption of an atomic oxygen adlayer on top of the Cu surface and below graphene after oxygen exposure at elevated temperature, but no oxidation of the substrate is induced. The emergence of the 2D Raman peak, quenched by the large interaction with the substrate, reveals that the intercalation process induces a structural undoing. As suggested by atomic force microscopy, the oxygen intercalation does not change significantly the surface morphology. Moreover, theoretical simulations provide further insights into the electronic and structural undoing process. This protocol opens the door to an efficient methodology to weaken the graphene-substrate interaction for a more efficient transfer to arbitrary surfaces.
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Affiliation(s)
- J. Azpeitia
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - I. Palacio
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - J.I. Martínez
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - I. Muñoz-Ochando
- Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas, ES-28006 Madrid, Spain
| | - K. Lauwaet
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - F.J. Mompean
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - G.J. Ellis
- Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas, ES-28006 Madrid, Spain
| | - M. García-Hernández
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - J.A. Martín-Gago
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - C. Munuera
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
| | - M.F. López
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco ES-28049, Madrid, Spain
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Fujiwara K, Fujiwara H, Yoshida H, Satoh T, Yonemori K, Nagao S, Matsumoto T, Kobayashi H, Bourgeois H, Harter P, Mosconi A, Palacio I, Reinthaller A, Fujita T, Bloomfield R, Pujade-Lauraine E, Ray-Coquard I. 236O Olaparib (ola) plus bevacizumab (bev) as maintenance (mx) therapy in patients (pts) with newly diagnosed advanced ovarian carcinoma (OC): Japan subset of the PAOLA-1 trial. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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9
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del Árbol NR, Palacio I, Sánchez-Sánchez C, Otero-Irurueta G, Martínez JI, Rodríguez L, Serrate D, Cossaro A, Lacovig P, Lizzit S, Verdini A, Floreano L, Martín-Gago JA, López MF. Role of the metal surface on the room temperature activation of the alcohol and amino groups of p-aminophenol. J Phys Chem C Nanomater Interfaces 2020; 124:19655-19665. [PMID: 33163138 PMCID: PMC7116303 DOI: 10.1021/acs.jpcc.0c06101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We present a comparative study of the room-temperature adsorption of p-aminophenol (p-AP) molecules on three metal surfaces, namely Cu(110), Cu(111) and Pt(111). We show that the chemical nature and the structural symmetry of the substrate control the activation of the terminal molecular groups, which result in different arrangements of the interfacial molecular layer. To this aim, we have used in-situ STM images combined with synchrotron radiation high resolution XPS and NEXAFS spectra, and the results were simulated by DFT calculations. On copper, the interaction between the molecules and the surface is weaker on the (111) surface crystal plane than on the (110) one, favouring molecular diffusion and leading to larger ordered domains. We demonstrate that the p-AP molecule undergoes spontaneous dehydrogenation of the alcohol group to form phenoxy species on all the studied surfaces, however, this process is not complete on the less reactive surface, Cu(111). The Pt(111) surface exhibits stronger molecule-surface interaction, inducing a short-range ordered molecular arrangement that increases overtime. In addition, on the highly reactive Pt(111) surface other chemical processes are evidenced, such as the dehydrogenation of the amine group.
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Affiliation(s)
- Nerea Ruiz del Árbol
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Irene Palacio
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Carlos Sánchez-Sánchez
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Gonzalo Otero-Irurueta
- Centre of Mechanical Technology and Automation (TEMA), University of Aveiro, 3810-193 Aveiro, Portugal
| | - José I. Martínez
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Luis Rodríguez
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - David Serrate
- Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Albano Cossaro
- Laboratorio TASC, CNR-IOM, Basovizza SS-14,Km 163.5, I-34149 Trieste, Italy
- Department of Chemical and Pharmaceutical Sciences. Università degli Studi di Trieste, via L. Giorgieri 1, 34127 Trieste, Italy
| | - Paolo Lacovig
- Elettra-Sinctrotrone Trieste S.C.p.A., S.S. 14 Km 163.5, I-34149 Trieste, Italy
| | - Silvano Lizzit
- Elettra-Sinctrotrone Trieste S.C.p.A., S.S. 14 Km 163.5, I-34149 Trieste, Italy
| | - Alberto Verdini
- Laboratorio TASC, CNR-IOM, Basovizza SS-14,Km 163.5, I-34149 Trieste, Italy
| | - Luca Floreano
- Laboratorio TASC, CNR-IOM, Basovizza SS-14,Km 163.5, I-34149 Trieste, Italy
| | - José A. Martín-Gago
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - María F. López
- Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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10
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García-Castaño A, González-Barrallo I, Rubio VC, Martínez JM, Mozo JM, Mujika K, Tarruella MM, Aguado de La Rosa C, Suárez MC, Palacio I, Osterloh L, Fernandez AM. 1118P Retrospective analysis of safety in elderly BRAF V600 mutation-positive advanced melanoma patients treated with dabrafenib (D) and trametinib (T) and correlation with non-elderly patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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11
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Palacio I, Lauwaet K, Vázquez L, Palomares FJ, González-Herrero H, Martínez JI, Aballe L, Foerster M, García-Hernández M, Martín-Gago JÁ. Ultra-thin NaCl films as protective layers for graphene. Nanoscale 2019; 11:16767-16772. [PMID: 31322636 PMCID: PMC6908451 DOI: 10.1039/c9nr03970h] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The ageing of graphene is an important issue that limits its technological applications. Capping layers are a good option for circumventing this problem. In this work, we propose the use of ultra-thin NaCl films as easily-removable protective layers. We have carried out a detailed characterization of the NaCl/graphene interface on metal substrates, namely Cu(111) and Ir(111), by means of complementary microscopy, electron diffraction and spectroscopic techniques. Interestingly, we show that NaCl neither interacts in a chemical way with graphene nor intercalates through it. We demonstrate that the NaCl film is stable under ambient conditions, protecting the graphene surface from oxidation. In addition, after removing the protective layer, graphene remains intact.
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Affiliation(s)
- Irene Palacio
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Koen Lauwaet
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Luis Vázquez
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Francisco Javier Palomares
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Héctor González-Herrero
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - José Ignacio Martínez
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Lucía Aballe
- ALBA Synchrotron Light Facility, Carrer de la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - Michael Foerster
- ALBA Synchrotron Light Facility, Carrer de la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - Mar García-Hernández
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - José Ángel Martín-Gago
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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12
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Palacio I, Aballe L, Foerster M, de Oteyza DG, García-Hernández M, Martín-Gago J. Reversible Graphene decoupling by NaCl photo-dissociation. 2d Mater 2019; 6:025021. [PMID: 30984408 PMCID: PMC6459370 DOI: 10.1088/2053-1583/ab056e] [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] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We describe the reversible intercalation of Na under graphene on Ir(111) by photo-dissociation of a previously adsorbed NaCl overlayer. After room temperature evaporation, NaCl adsorbs on top of graphene forming a bilayer. With a combination of electron diffraction and photoemission techniques we demonstrate that the NaCl overlayer dissociates upon a short exposure to an X-ray beam. As a result, chlorine desorbs while sodium intercalates under the graphene, inducing an electronic decoupling from the underlying metal. Low energy electron diffraction shows the disappearance of the moiré pattern when Na intercalates between graphene and iridium. Analysis of the Na 2p core-level by X-ray photoelectron spectroscopy shows a chemical change from NaCl to metallic buried Na at the graphene/Ir interface. The intercalation-decoupling process leads to a n-doped graphene due to the charge transfer from the Na, as revealed by constant energy angle resolved X-ray photoemission maps. Moreover, the process is reversible by a mild annealing of the samples without damaging the graphene.
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Affiliation(s)
- I. Palacio
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - L. Aballe
- ALBA Synchrotron, Carrer de la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - M. Foerster
- ALBA Synchrotron, Carrer de la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - D. G. de Oteyza
- Donostia International Physics Center (DIPC), Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48011 Bilbao, Spain
- Materials Physics Center, Centro de Física de Materiales (CSIC/UPV-EHU), Paseo Manuel Lardizabal 5, 20018 San Sebastián, Spain
| | - M. García-Hernández
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - J.A. Martín-Gago
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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13
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Ruiz del Árbol N, Palacio I, Otero‐Irurueta G, Martínez JI, de Andrés PL, Stetsovych O, Moro‐Lagares M, Mutombo P, Svec M, Jelínek P, Cossaro A, Floreano L, Ellis GJ, López MF, Martín‐Gago JA. On-Surface Bottom-Up Synthesis of Azine Derivatives Displaying Strong Acceptor Behavior. Angew Chem Int Ed Engl 2018; 57:8582-8586. [PMID: 29931817 PMCID: PMC6055674 DOI: 10.1002/anie.201804110] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 11/10/2022]
Abstract
On-surface synthesis is an emerging approach to obtain, in a single step, precisely defined chemical species that cannot be obtained by other synthetic routes. The control of the electronic structure of organic/metal interfaces is crucial for defining the performance of many optoelectronic devices. A facile on-surface chemistry route has now been used to synthesize the strong electron-acceptor organic molecule quinoneazine directly on a Cu(110) surface, via thermally activated covalent coupling of para-aminophenol precursors. The mechanism is described using a combination of in situ surface characterization techniques and theoretical methods. Owing to a strong surface-molecule interaction, the quinoneazine molecule accommodates 1.2 electrons at its carbonyl ends, inducing an intramolecular charge redistribution and leading to partial conjugation of the rings, conferring azo-character at the nitrogen sites.
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Affiliation(s)
- Nerea Ruiz del Árbol
- ESISNA Group, Materials Science Factory.Institute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Irene Palacio
- ESISNA Group, Materials Science Factory.Institute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Gonzalo Otero‐Irurueta
- Centre for Mechanical Technology and Automation (TEMA)University of Aveiro3810-193AveiroPortugal
| | - José I. Martínez
- ESISNA Group, Materials Science Factory.Institute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Pedro L. de Andrés
- ESISNA Group, Materials Science Factory.Institute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - Oleksander Stetsovych
- Institute of PhysicsAcademy of Sciences of the Czech RepublicCukrovarnicka 101862 53PragueCzech Republic
| | - María Moro‐Lagares
- Institute of PhysicsAcademy of Sciences of the Czech RepublicCukrovarnicka 101862 53PragueCzech Republic
| | - Pingo Mutombo
- Institute of PhysicsAcademy of Sciences of the Czech RepublicCukrovarnicka 101862 53PragueCzech Republic
| | - Martin Svec
- Institute of PhysicsAcademy of Sciences of the Czech RepublicCukrovarnicka 101862 53PragueCzech Republic
| | - Pavel Jelínek
- Institute of PhysicsAcademy of Sciences of the Czech RepublicCukrovarnicka 101862 53PragueCzech Republic
| | - Albano Cossaro
- Laboratorio TASC, CNR-IOMBasovizza SS-14, Km 163.534149TriesteItaly
| | - Luca Floreano
- Laboratorio TASC, CNR-IOMBasovizza SS-14, Km 163.534149TriesteItaly
| | - Gary J. Ellis
- Polymer Physics GroupInstitute of Polymer Science and Technology (ICTP-CSIC)Juan de la Cierva 328006MadridSpain
| | - María F. López
- ESISNA Group, Materials Science Factory.Institute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
| | - José A. Martín‐Gago
- ESISNA Group, Materials Science Factory.Institute of Materials Science of Madrid (ICMM-CSIC)Sor Juana Inés de la Cruz 328049MadridSpain
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14
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Ruiz del Árbol N, Palacio I, Otero‐Irurueta G, Martínez JI, de Andrés PL, Stetsovych O, Moro‐Lagares M, Mutombo P, Svec M, Jelínek P, Cossaro A, Floreano L, Ellis GJ, López MF, Martín‐Gago JA. On‐Surface Bottom‐Up Synthesis of Azine Derivatives Displaying Strong Acceptor Behavior. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804110] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nerea Ruiz del Árbol
- ESISNA Group, Materials Science Factory. Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Irene Palacio
- ESISNA Group, Materials Science Factory. Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Gonzalo Otero‐Irurueta
- Centre for Mechanical Technology and Automation (TEMA) University of Aveiro 3810-193 Aveiro Portugal
| | - José I. Martínez
- ESISNA Group, Materials Science Factory. Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Pedro L. de Andrés
- ESISNA Group, Materials Science Factory. Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - Oleksander Stetsovych
- Institute of Physics Academy of Sciences of the Czech Republic Cukrovarnicka 10 1862 53 Prague Czech Republic
| | - María Moro‐Lagares
- Institute of Physics Academy of Sciences of the Czech Republic Cukrovarnicka 10 1862 53 Prague Czech Republic
| | - Pingo Mutombo
- Institute of Physics Academy of Sciences of the Czech Republic Cukrovarnicka 10 1862 53 Prague Czech Republic
| | - Martin Svec
- Institute of Physics Academy of Sciences of the Czech Republic Cukrovarnicka 10 1862 53 Prague Czech Republic
| | - Pavel Jelínek
- Institute of Physics Academy of Sciences of the Czech Republic Cukrovarnicka 10 1862 53 Prague Czech Republic
| | - Albano Cossaro
- Laboratorio TASC, CNR-IOM Basovizza SS-14, Km 163.5 34149 Trieste Italy
| | - Luca Floreano
- Laboratorio TASC, CNR-IOM Basovizza SS-14, Km 163.5 34149 Trieste Italy
| | - Gary J. Ellis
- Polymer Physics Group Institute of Polymer Science and Technology (ICTP-CSIC) Juan de la Cierva 3 28006 Madrid Spain
| | - María F. López
- ESISNA Group, Materials Science Factory. Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
| | - José A. Martín‐Gago
- ESISNA Group, Materials Science Factory. Institute of Materials Science of Madrid (ICMM-CSIC) Sor Juana Inés de la Cruz 3 28049 Madrid Spain
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15
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Palacio I, Otero-Irurueta G, Alonso C, Martínez JI, López-Elvira E, Muñoz-Ochando I, Salavagione HJ, López MF, García-Hernández M, Méndez J, Ellis GJ, Martín-Gago JA. Chemistry below graphene: decoupling epitaxial graphene from metals by potential-controlled electrochemical oxidation. Carbon N Y 2018; 129:837-846. [PMID: 30190626 PMCID: PMC6120681 DOI: 10.1016/j.carbon.2017.12.104] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
While high-quality defect-free epitaxial graphene can be efficiently grown on metal substrates, strong interaction with the supporting metal quenches its outstanding properties. Thus, protocols to transfer graphene to insulating substrates are obligatory, and these often severely impair graphene properties by the introduction of structural or chemical defects. Here we describe a simple and easily scalable general methodology to structurally and electronically decouple epitaxial graphene from Pt(111) and Ir(111) metal surfaces. A multi-technique characterization combined with ab-initio calculations was employed to fully explain the different steps involved in the process. It was shown that, after a controlled electrochemical oxidation process, a single-atom thick metal-hydroxide layer intercalates below graphene, decoupling it from the metal substrate. This decoupling process occurs without disrupting the morphology and electronic properties of graphene. The results suggest that suitably optimized electrochemical treatments may provide effective alternatives to current transfer protocols for graphene and other 2D materials on diverse metal surfaces.
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Affiliation(s)
- Irene Palacio
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Gonzalo Otero-Irurueta
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
- Centre for Mechanical Technology and Automation (TEMA), Dept. Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Concepción Alonso
- Dept. Applied Physical Chemistry, Autonomous University of Madrid, 28049 Madrid, Spain
| | - José I. Martínez
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Elena López-Elvira
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Isabel Muñoz-Ochando
- Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - Horacio J. Salavagione
- Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - María F. López
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Mar García-Hernández
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Javier Méndez
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Gary J. Ellis
- Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
| | - José A. Martín-Gago
- Materials Science Factory, Dept. Surfaces, Coatings and Molecular Astrophysics, Institute of Material Science of Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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16
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Azpeitia J, Otero-Irurueta G, Palacio I, Martinez JI, del Árbol NR, Santoro G, Gutiérrez A, Aballe L, Foerster M, Kalbac M, Vales V, Mompeán FJ, García-Hernández M, Martín-Gago JA, Munuera C, López MF. High-quality PVD graphene growth by fullerene decomposition on Cu foils. Carbon N Y 2017; 119:535-543. [PMID: 28507390 PMCID: PMC5428744 DOI: 10.1016/j.carbon.2017.04.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present a new protocol to grow large-area, high-quality single-layer graphene on Cu foils at relatively low temperatures. We use C60 molecules evaporated in ultra high vacuum conditions as carbon source. This clean environment results in a strong reduction of oxygen-containing groups as depicted by X-ray photoelectron spectroscopy (XPS). Unzipping of C60 is thermally promoted by annealing the substrate at 800ºC during evaporation. The graphene layer extends over areas larger than the Cu crystallite size, although it is changing its orientation with respect to the surface in the wrinkles and grain boundaries, producing a modulated ring in the low energy electron diffraction (LEED) pattern. This protocol is a self-limiting process leading exclusively to one single graphene layer. Raman spectroscopy confirms the high quality of the grown graphene. This layer exhibits an unperturbed Dirac-cone with a clear n-doping of 0.77 eV, which is caused by the interaction between graphene and substrate. Density functional theory (DFT) calculations show that this interaction can be induced by a coupling between graphene and substrate at specific points of the structure leading to a local sp3 configuration, which also contribute to the D-band in the Raman spectra.
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Affiliation(s)
- J. Azpeitia
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - G. Otero-Irurueta
- Center for Mechanical Technology and Automation (TEMA-DEM), University of Aveiro, 3810-193 Aveiro, Portugal
| | - I. Palacio
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - J. I. Martinez
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - N. Ruiz del Árbol
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - G. Santoro
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - A. Gutiérrez
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - L. Aballe
- ALBA Synchrotron Light Facility, Carrer de la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - M. Foerster
- ALBA Synchrotron Light Facility, Carrer de la llum 2-26, Cerdanyola del Vallès, Barcelona 08290, Spain
| | - M. Kalbac
- J. Heyrovský Institute of Physical Chemistry, ASCR, v.v.i., Dolejškova 3, CZ-18223 Prague 8, Czech Republic
| | - V. Vales
- J. Heyrovský Institute of Physical Chemistry, ASCR, v.v.i., Dolejškova 3, CZ-18223 Prague 8, Czech Republic
| | - F. J. Mompeán
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - M. García-Hernández
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - J. A. Martín-Gago
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - C. Munuera
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
| | - M. F. López
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
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17
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Bueno RA, Martínez JI, Luccas RF, Del Árbol NR, Munuera C, Palacio I, Palomares FJ, Lauwaet K, Thakur S, Baranowski JM, Strupinski W, López MF, Mompean F, García-Hernández M, Martín-Gago JA. Highly selective covalent organic functionalization of epitaxial graphene. Nat Commun 2017; 8:15306. [PMID: 28480884 PMCID: PMC5424159 DOI: 10.1038/ncomms15306] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [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: 08/08/2016] [Accepted: 03/20/2017] [Indexed: 12/16/2022] Open
Abstract
Graphene functionalization with organics is expected to be an important step for the development of graphene-based materials with tailored electronic properties. However, its high chemical inertness makes difficult a controlled and selective covalent functionalization, and most of the works performed up to the date report electrostatic molecular adsorption or unruly functionalization. We show hereafter a mechanism for promoting highly specific covalent bonding of any amino-terminated molecule and a description of the operating processes. We show, by different experimental techniques and theoretical methods, that the excess of charge at carbon dangling-bonds formed on single-atomic vacancies at the graphene surface induces enhanced reactivity towards a selective oxidation of the amino group and subsequent integration of the nitrogen within the graphene network. Remarkably, functionalized surfaces retain the electronic properties of pristine graphene. This study opens the door for development of graphene-based interfaces, as nano-bio-hybrid composites, fabrication of dielectrics, plasmonics or spintronics.
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Affiliation(s)
- Rebeca A Bueno
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - José I Martínez
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Roberto F Luccas
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain.,Instituto de Física Rosario-CONICET-UNR, Bv. 27 de Febrero 210bis, Rosario S2000EZP, Argentina
| | - Nerea Ruiz Del Árbol
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Carmen Munuera
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Irene Palacio
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Francisco J Palomares
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Koen Lauwaet
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Sangeeta Thakur
- Sincrotrone Trieste, strada Statale 14 - km 163, Basovizza 5 34149, Italy
| | - Jacek M Baranowski
- Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw, Poland
| | - Wlodek Strupinski
- Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw, Poland
| | - María F López
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Federico Mompean
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - Mar García-Hernández
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
| | - José A Martín-Gago
- Materials Science Factory, Instituto de Ciencia de Materiales de Madrid-CSIC, C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
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18
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N Nair M, Palacio I, Celis A, Zobelli A, Gloter A, Kubsky S, Turmaud JP, Conrad M, Berger C, de Heer W, Conrad EH, Taleb-Ibrahimi A, Tejeda A. Band Gap Opening Induced by the Structural Periodicity in Epitaxial Graphene Buffer Layer. Nano Lett 2017; 17:2681-2689. [PMID: 28345926 DOI: 10.1021/acs.nanolett.7b00509] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The epitaxial graphene buffer layer on the Si face of hexagonal SiC shows a promising band gap, of which the precise origin remains to be understood. In this work, we correlate the electronic to the atomic structure of the buffer layer by combining angle resolved photoemission spectroscopy (ARPES), scanning tunneling microscopy (STM), and high-resolution scanning transmission electron microscopy (HR-STEM). We show that the band structure in the buffer has an electronic periodicity related to the structural periodicity observed in STM images and published X-ray diffraction. Our HR-STEM measurements show the bonding of the buffer layer to the SiC at specific locations separated by 1.5 nm. This is consistent with the quasi 6 × 6 periodic corrugation observed in the STM images. The distance between buffer C and SiC is 1.9 Å in the bonded regions and up to 2.8 Å in the decoupled regions, corresponding to a 0.9 Å corrugation of the buffer layer. The decoupled regions are sp2 hybridized. Density functional tight binding (DFTB) calculations demonstrate the presence of a gap at the Dirac point everywhere in the buffer layer, even in the decoupled regions where the buffer layer has an atomic structure close to that of graphene. The surface periodicity also promotes band in the superperiodic Brillouin zone edges as seen by photoemission and confirmed by our calculations.
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Affiliation(s)
- Maya N Nair
- UR1 CNRS/Synchrotron SOLEIL, Saint-Aubin, 91192 Gif sur Yvette, France
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Bât. 510 , F-91405 Orsay Cedex, France
| | - Irene Palacio
- UR1 CNRS/Synchrotron SOLEIL, Saint-Aubin, 91192 Gif sur Yvette, France
| | - Arlensiú Celis
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Bât. 510 , F-91405 Orsay Cedex, France
- Synchrotron SOLEIL, L'Orme des Merisiers , Saint-Aubin, 91192 Gif sur Yvette, France
| | - Alberto Zobelli
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Bât. 510 , F-91405 Orsay Cedex, France
| | - Alexandre Gloter
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Bât. 510 , F-91405 Orsay Cedex, France
| | - Stefan Kubsky
- Synchrotron SOLEIL, L'Orme des Merisiers , Saint-Aubin, 91192 Gif sur Yvette, France
| | - Jean-Philippe Turmaud
- School of Physics, The Georgia Institute of Technology , Atlanta, Georgia 30332-0430, United States
| | - Matthew Conrad
- School of Physics, The Georgia Institute of Technology , Atlanta, Georgia 30332-0430, United States
| | - Claire Berger
- School of Physics, The Georgia Institute of Technology , Atlanta, Georgia 30332-0430, United States
- CNRS/Institut Neél, BP166 , 38042 Grenoble, France
| | - Walter de Heer
- School of Physics, The Georgia Institute of Technology , Atlanta, Georgia 30332-0430, United States
| | - Edward H Conrad
- School of Physics, The Georgia Institute of Technology , Atlanta, Georgia 30332-0430, United States
| | | | - Antonio Tejeda
- Laboratoire de Physique des Solides, CNRS, Univ. Paris-Sud, Université Paris-Saclay, Bât. 510 , F-91405 Orsay Cedex, France
- Synchrotron SOLEIL, L'Orme des Merisiers , Saint-Aubin, 91192 Gif sur Yvette, France
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Palacio I, Pinardi AL, Martínez JI, Preobrajenski A, Cossaro A, Jancarik A, Stará I, Starý I, Méndez J, Martín-Gago JA, López MF. Spectroscopic characterization of the on-surface induced (cyclo)dehydrogenation of a N-heteroaromatic compound on noble metal surfaces. Phys Chem Chem Phys 2017; 19:22454-22461. [DOI: 10.1039/c7cp03955g] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Connecting polycyclic aromatic hydrocarbons by on-surface chemistry.
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Palacio I, Celis A, Nair MN, Gloter A, Zobelli A, Sicot M, Malterre D, Nevius MS, de Heer WA, Berger C, Conrad EH, Taleb-Ibrahimi A, Tejeda A. Atomic structure of epitaxial graphene sidewall nanoribbons: flat graphene, miniribbons, and the confinement gap. Nano Lett 2015; 15:182-189. [PMID: 25457853 DOI: 10.1021/nl503352v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Graphene nanoribbons grown on sidewall facets of SiC have demonstrated exceptional quantized ballistic transport up to 15 μm at room temperature. Angular-resolved photoemission spectroscopy (ARPES) has shown that the ribbons have the band structure of charge neutral graphene, while bent regions of the ribbon develop a bandgap. We present scanning tunneling microscopy and transmission electron microscopy of armchair nanoribbons grown on recrystallized sidewall trenches etched in SiC. We show that the nanoribbons consist of a single graphene layer essentially decoupled from the facet surface. The nanoribbons are bordered by 1-2 nm wide bent miniribbons at both the top and bottom edges of the nanoribbons. We establish that nanoscale confinement in the graphene miniribbons is the origin of the local large band gap observed in ARPES. The structural results presented here show how this gap is formed and provide a framework to help understand ballistic transport in sidewall graphene.
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Affiliation(s)
- Irene Palacio
- UR1 CNRS/Synchrotron SOLEIL , Saint-Aubin, 91192 Gif sur Yvette, France
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Martin-Algarra S, Soriano V, Malvehy J, Berrocal A, Quindos M, Martinez Del Prado P, Soria A, Márquez-Rodas I, Palacio I, Cerezuela P, Alonso L, López-Vivanco G, Nocea G, Stevinson K, Del Barrio P, Tornamira M, Guillem Porta V, Espinosa E. Treatment Patterns of Adjuvant Interferon Alfa-2B (Ifn-&Agr;2B) for High-Risk Melanoma. a Retrospective Study of the Grupo Español Multidisciplinar De Melanoma (Gem). Ann Oncol 2014. [DOI: 10.1093/annonc/mdu344.39] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rodríguez de la Fuente O, González-Barrio MA, Navarro V, Pabón BM, Palacio I, Mascaraque A. Surface defects and their influence on surface properties. J Phys Condens Matter 2013; 25:484008. [PMID: 24201152 DOI: 10.1088/0953-8984/25/48/484008] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Surface defects have a profound influence on many attributes of materials, therefore experimental techniques and specific studies focused on their controlled generation and properties are mandatory. We have carried out a thorough study of the role of surface defects on a variety of physico-chemical properties of metals and oxides, using different experimental techniques and molecular dynamics simulations. In particular, we have studied the defects formed upon bombardment with Ar+ ions in a reconstructed Au(100) surface at very low ion doses. At room temperature, the pristine defects are mainly single vacancies, which diffuse by collective atomic motions, then cluster and collapse, resulting in 2D dislocation dipoles. These dislocations exhibit an enhanced chemical reactivity due to the elastic stress of their cores. We have also performed indentation tests of flat and stepped Au(111) samples with an atomic force microscope, revealing noticeable differences in their mechanical behavior when probed at the nanoscale. Thus, the stepped sample has a 20% smaller Young's modulus, 40% smaller yield point and 50% smaller shear stress. These differences, as well as reversible, quasiplastic behavior of the stepped sample up to a critical load, are due to the active role of steps as dislocation nucleation centers. In contrast, a TiO2(110) surface, modified with ion bombardment, does not show noticeable changes in its nanomechanical properties, which is an indication of the very different mechanical responses of oxides compared to simple metals at the nanoscale. Finally, we show how surface defects affect the chemical activity of a Pt(111) surface when exposed to methanol. The nature of the adsorbed species and the dynamics of the surface reactions are modified in the presence of surface defects, rendering the defective surface into a more robust state against catalytic poisoning.
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Abstract
We study how FeO wüstite films on Ru(0001) grow by oxygen-assisted molecular beam epitaxy at elevated temperatures (800–900 K). The nucleation and growth of FeO islands are observed in real time by low-energy electron microscopy (LEEM). When the growth is performed in an oxygen pressure of 10(−6) Torr, the islands are of bilayer thickness (Fe–O–Fe–O). In contrast, under a pressure of 10(−8) Torr, the islands are a single FeO layer thick. We propose that the film thickness is controlled by the concentration of oxygen adsorbed on the Ru. More specifically, when monolayer growth increases the adsorbed oxygen concentration above a limiting value, its growth is suppressed. Increasing the temperature at a fixed oxygen pressure decreases the density of FeO islands. However, the nucleation density is not a monotonic function of oxygen pressure.
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Pinardi AL, Otero-Irurueta G, Palacio I, Martinez JI, Sanchez-Sanchez C, Tello M, Rogero C, Cossaro A, Preobrajenski A, Gómez-Lor B, Jancarik A, Stará IG, Starý I, Lopez MF, Méndez J, Martin-Gago JA. Tailored formation of N-doped nanoarchitectures by diffusion-controlled on-surface (cyclo)dehydrogenation of heteroaromatics. ACS Nano 2013; 7:3676-3684. [PMID: 23506342 DOI: 10.1021/nn400690e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Surface-assisted cyclodehydrogenation and dehydrogenative polymerization of polycyclic (hetero)aromatic hydrocarbons (PAH) are among the most important strategies for bottom-up assembly of new nanostructures from their molecular building blocks. Although diverse compounds have been formed in recent years using this methodology, a limited knowledge on the molecular machinery operating at the nanoscale has prevented a rational control of the reaction outcome. We show that the strength of the PAH-substrate interaction rules the competitive reaction pathways (cyclodehydrogenation versus dehydrogenative polymerization). By controlling the diffusion of N-heteroaromatic precursors, the on-surface dehydrogenation can lead to monomolecular triazafullerenes and diazahexabenzocoronenes (N-doped nanographene), to N-doped oligomeric or polymeric networks, or to carbonaceous monolayers. Governing the on-surface dehydrogenation process is a step forward toward the tailored fabrication of molecular 2D nanoarchitectures distinct from graphene and exhibiting new properties of fundamental and technological interest.
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Affiliation(s)
- Anna Lisa Pinardi
- Instituto de Ciencia de Materiales de Madrid ((ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, Cantoblanco, 28049 Madrid, Spain
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Palacio I, Rojo JM, Rodríguez de la Fuente O. Surface Defects Activating New Reaction Paths: Formation of Formate during Methanol Oxidation on Ru(0001). Chemphyschem 2012; 13:2354-60. [PMID: 22517733 DOI: 10.1002/cphc.201200190] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Irene Palacio
- Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid 28040, Spain
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Esteban E, Fernández Y, Vieitez J, Villanueva N, De Sande J, Fra J, Muñiz I, Palacio I, Fernández J, Lacave A. O-113 Cisplatin plus gemcitabine with or without vinorelbine asneo-adjuvant therapy for radically treatable stage III Non small cell lung cancer (NSCLC). Preliminary results of a randomised study of the GON (Grupo Oncológico del Norte de España). Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80247-8] [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: 11/15/2022]
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Palacio I, Welch JC, Pruitt CW. 99 LIFEGUARD SURVEILLANCE: AN OCEANFRONT INJURY PREVENTION PROJECT. J Investig Med 2005. [DOI: 10.2310/6650.2005.00006.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Fernández Y, Vieitez JM, Fra J, Palacio I, Mareque B, Uña E, Buesa JM, Lacave AJ. Capecitabine plus gemcitabine in heavily pre-treated colorectal cancer. Results of an exploratory study. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.3679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | | | - J. Fra
- Hospital Central de Asturias, Oviedo, Spain
| | - I. Palacio
- Hospital Central de Asturias, Oviedo, Spain
| | - B. Mareque
- Hospital Central de Asturias, Oviedo, Spain
| | - E. Uña
- Hospital Central de Asturias, Oviedo, Spain
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Esteban E, González de Sande L, Fernández Y, Corral N, Fra J, Muñiz I, Vieitez JM, Palacio I, Fernández JL, Estrada E, Lacave AJ. Prospective randomised phase II study of docetaxel versus paclitaxel administered weekly in patients with non-small-cell lung cancer previously treated with platinum-based chemotherapy. Ann Oncol 2003; 14:1640-7. [PMID: 14581272 DOI: 10.1093/annonc/mdg456] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [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: 11/13/2022] Open
Abstract
BACKGROUND Docetaxel and paclitaxel have activity in the second-line treatment of non-small-cell lung cancer (NSCLC), and can be administered as weekly schedules. This phase II randomised study was designed to test the efficacy and toxicity of both taxanes in patients with NSCLC previously treated with platinum-based chemotherapy. PATIENTS AND METHODS Patients (n = 71) with documented NSCLC were randomised to receive docetaxel (n = 35 patients; 36 mg/m(2)) or paclitaxel (n = 36 patients; 80 mg/m(2)) as a 1 h weekly infusion for 6 weeks followed by a 2-week rest. The cycles were repeated until disease progression or non-acceptable toxicities occurred. RESULTS Treatment achieved partial response of one versus five patients, median time-to-progression of 74 versus 68 days, and overall survival of 184 versus 105 days, with docetaxel and paclitaxel, respectively. The most common non-haematological toxicities were (docetaxel versus paclitaxel): grade 3/4 pulmonary toxicity in seven versus one patient; grade 2/3 diarrhoea in nine versus five; and grade 3/4 haematological toxicities occurred in two versus four patients. There were no treatment-related deaths. CONCLUSIONS Docetaxel and paclitaxel administered weekly have discrete efficacy in patients with NSCLC previously treated with platinum-based chemotherapy. The higher non-haematological toxicity of docetaxel, particularly pulmonary toxicity and diarrhoea, is of concern and warrants further investigation.
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Affiliation(s)
- E Esteban
- Servicio de Oncología Médica, Hospital Central de Asturias, Oviedo, Asturias, Spain.
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Esteban E, de Sande G, Puertas J, Fra J, Palacio I, Vieitez JM, Fernández JL, Muñiz I, Modollel A, Carrasco J, Sala M, Lacave AJ. A phase II trial of cyclophosphamide, epirubicin and vinorelbine in the treatment of advanced breast cancer. Breast Cancer Res Treat 2000; 62:127-33. [PMID: 11016750 DOI: 10.1023/a:1006477109230] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/12/2022]
Abstract
BACKGROUND Vinorelbine (Navelbin; N) has proven to be active in patients with advanced breast cancer (ABC) and cyclophosphamide (C) and epirubicin (Epiadriamycin: E) are still among the main cytostatic agents against this tumor. On this basis was carried out a study to determine the activity and toxicity of the combination of these three agents (CEN). PATIENTS AND METHOD From April 1996 to March 1998, 59 patients with ABC were recruited of whom 56 were found eligible and evaluable for toxicity and 55 for activity. The treatment regimen was C: 400 mg/m2, E: 30 mg/m2 and N: 25 mg/m2 administered intravenously on days 1 and 8 of a 28-day cycle. RESULTS The median number of cycles administered was 6 (range: 1-16). The most common hematological toxicity was grade (G) 3 and 4 neutropenia occurring in 36% of patients, associated with fever in 7% of them. Grade 3-4 thrombocytopenia and anemia occurred in 5% and 7%, respectively. Other G2-G3 non hematologic toxicities were: N/vomiting in 34%, alopecia in 73% and mucositis in 11% of patients. An objective response was achieved in 28 of 56 patients (50%) (95% confidence interval (CI): 37-63%): complete response (CR) in 9%, partial response (PR) in 41%. The median duration of response, time to progression and overall survival time was 54, 47 and 90 weeks, respectively. CONCLUSION The CEN combination at these doses and treatment schedule appears to have acceptable tolerability but there is no apparent improvement in therapeutic efficacy when compared to other regimens used as first line treatment in ABC.
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Affiliation(s)
- E Esteban
- Servicio de Ontología Médica, Hospital Central de Asturias, Spain.
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Estaban E, Lacave AJ, Fernández JL, Corral N, Buesa JM, Estrada E, Palacio I, Vieitez JM, Muñiz I, Alvarez E. Phase III trial of cyclophosphamide, epirubicin, fluorouracil (CEF) versus cyclophosphamide, mitoxantrone, fluorouracil (CNF) in women with metastatic breast cancer. Breast Cancer Res Treat 1999; 58:141-50. [PMID: 10674879 DOI: 10.1023/a:1006387801960] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/12/2022]
Abstract
BACKGROUND The mitoxantrone combination CNF and the epirubicin combination CEF have shown similar activity and less toxicity than the standard CAF combination in metastatic breast cancer (MBC). A prospective randomised study was started to compare safety and activity between CEF and CNF administered using a classical chemotherapeutic schedule in MBC. PATIENTS AND METHODS From December 1987 to June 1993, 151 patients were randomised to receive cyclophosphamide (C) 100 mg m(-2) p.o. days 1-14, fluorouracil (F) 500 mg m(-2) i.v. days 1 and 8, and epirubicin (E) 30 mg m(-2) i.v. days 1 and 8, or mitoxantrone (N) 6 mg m(-2) i.v. days 1 and 8, every 4 weeks. Seventy-three patients were eligible for CEF and 72 for CNF. RESULTS Objective responses were observed in 61.6% of the CEF group and 44.4% in CNF group (p = 0.004). The median duration of response was 64 weeks in CEF and 50 weeks in CNF group (p = 0.02) and median time to progression was 51 and 33 weeks, respectively (p = 0.0004). At the time of analysis, all except six patients (one in CNF and five in CEF) had died and the median survival time in the CEF group was longer than in CNF (74.4 weeks vs 51.4 weeks; log-rank chi2 test p = 0.015). CNF produced more hematologic toxicity than CEF (WHO scale; grades 2-4); leucopenia 84% vs 68% (p = 0.03) and thrombocytopenia 17% vs 4.5% (p = 0.01); CEF caused more grade 2 and 3 alopecia: 93% vs 70% (p = 0.001). CONCLUSION The combination CEF using this schedule and dosage in metastatic breast cancer is more effective with less toxicity than CNF, except for alopecia, and was associated with longer survival.
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Affiliation(s)
- E Estaban
- Servicio de Oncología Médica, Hospital Central de Asturias, Oviedo, Spain
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Lacave AJ, Peláez I, Palacio I. Chemotherapy for ovarian cancer. N Engl J Med 1996; 334:1269-70. [PMID: 8606731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Peláez I, Lacave AJ, Palacio I, Alvarez E, Cueva JF, Muñiz I, Arranz F, Fra J. Phase II trial of epirubicin at standard dose in relapsed ovarian cancer. Eur J Cancer 1996; 32A:899-900. [PMID: 9081375 DOI: 10.1016/0959-8049(96)00003-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Peláez I, López R, Palacio I, Fernández Y, Estrada E, Esteban E, Buesa JM, Lacave AJ. Phase II study of mitomycin C plus 5-fluorouracil in patients with refractory ovarian cancer. Eur J Cancer 1994; 30A:1206-7. [PMID: 7654459 DOI: 10.1016/0959-8049(94)90490-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Palacio I, Fernández Y, Peláez I, Cueva J, Esteban E, Estrada E, Buesa JM, Lacave AJ. Negative phase II with 5-fluorouracil (5-FU) plus low doses of leucovorin (LV) in refractory breast carcinoma(RBC). Eur J Cancer 1993. [DOI: 10.1016/0959-8049(93)91083-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Esteban E, Buesa JM, Cueva J, Fernández Y, Peláez I, Fernández JL, Sanz A, Palacio I, Estrada E, Gracia JM. Phase II study of oral ftorafur and uracil in patients with advanced renal cell carcinoma. Eur J Cancer 1993; 29A:1354. [PMID: 8343285 DOI: 10.1016/0959-8049(93)90091-s] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Palacio I, Buesa JM, De Sande L, Cueva JF, Esteban E, Estrada E, Gracia JM, Lacave AJ. Negative phase II study with carboplatin and 5-fluorouracil in advanced breast cancer. Eur J Cancer 1992; 28:242. [PMID: 1567669 DOI: 10.1016/0959-8049(92)90417-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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38
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Lacave AJ, Barón FJ, Antón LM, Estrada E, De Sande LM, Palacio I, Esteban E, Gracia JM, Buesa JM, Fernández OA. Combination chemotherapy with cisplatin and 5-fluorouracil 5-day infusion in the therapy of advanced gastric cancer: a phase II trial. Ann Oncol 1991; 2:751-4. [PMID: 1801881 DOI: 10.1093/oxfordjournals.annonc.a057858] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.0] [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: 12/28/2022] Open
Abstract
Fifty-six patients with measurable or evaluable advanced gastric cancer were treated with cisplatin, 100 mg/m2 in continuous infusion of 24 hours, and 5-fluorouracil, 1000 mg/m2/day (by continuous 5-day infusion) every 4 weeks. Three patients were found ineligible for the study. A response rate of 41% (22/53) was obtained (95% confidence interval: 28%-54%), with a median duration of remission of 10.2 months and an overall median survival time of 10.6 months. Leukopenia and thrombocytopenia were mild. Nausea and vomiting were common, and 23.5% of the patients had grade 3 stomatitis. Peripheral neuropathy and renal insufficiency increased with the number of cycles, representing the cumulative dose-limiting toxicity. This study indicates that the combination of cisplatin plus 5-fluorouracil is synergistic or at least has additive antitumor activity. We think that this association of 2 drugs should be considered for further phase III clinical trials.
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Affiliation(s)
- A J Lacave
- Servicio de Oncología Médica, Hospital General de Asturias, Oviedo, Spain
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Palacio I, Buesa JM, Barón FJ, López R, Cueva JF, Esteban E, Estrada E, Gracia JM, Lacave AJ. Inefficiency of cisplatin plus 5-FU as second-or third line treatment in advanced breast cancer. Ann Oncol 1991; 2:521. [PMID: 1911462 DOI: 10.1093/oxfordjournals.annonc.a058008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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40
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Buesa JM, Fernández R, Esteban E, Estrada E, Barón FJ, Palacio I, Gracia M, Lacave AJ. Phase II trial of ifosfamide in recurrent and metastatic head and neck cancer. Ann Oncol 1991; 2:151-2. [PMID: 1905150 DOI: 10.1093/oxfordjournals.annonc.a057880] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 12/29/2022] Open
Abstract
Thirty-six patients with recurrent carcinoma of the head and neck and no prior exposure to chemotherapy were treated with Ifosfamide. This drug was administered, concomitantly with Mesna, as a 24-hr infusion at a dose of 5-6.25 g/m2 every 3 weeks. Objective activity in 32 evaluable patients was 28% (9/32, 95% C.I. 17%-39%); 40% of patients had leukocyte values less than 2000 mm3 and 6% platelets less than 50,000 mm3. Nonhematologic toxicity consisted mainly of nausea/vomiting (66% greater than or equal to grade 2) and alopecia (80% greater than or equal to grade 2). The activity encountered warrants further studies with this drug in head and neck cancer.
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Affiliation(s)
- J M Buesa
- Servicio de Oncología Médica, Hospital General de Asturias, Oviedo, Spain
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Buesa JM, Fernández R, Barón FJ, Palacio I, Cueva J, Esteban E, Gracia JM. Dacarbazine in advanced squamous cell carcinoma of the head and neck. Eur J Cancer 1991; 27:215-6. [PMID: 1827292 DOI: 10.1016/0277-5379(91)90492-v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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