ÁP

Ángel Pérez del Pino

Institut de Ciència de Materials de Barcelona

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E. M. Gyorgy

Consejo Superior de Investigaciones Científicas

C. Logofatu

National Institute for Laser Plasma and Radiation Physics

Josep Puigmartí‐Luis

Institució Catalana de Recerca i Estudis Avançats

David B. Amabilino

Institut de Ciència de Materials de Barcelona

P. Serra

Universitat de Barcelona

Pablo García Lebière

Institut de Ciència de Materials de Barcelona

J.L. Morenza

Universitat de Barcelona

Concepció Rovira

Institut de Ciència de Materials de Barcelona

V. N. Laukhin

Institució Catalana de Recerca i Estudis Avançats

Raluca Ivan

National Institute for Laser Plasma and Radiation Physics

Cooperative Institutions

Institut de Ciència de Materials de Barcelona

Consejo Superior de Investigaciones Científicas

Universitat Autònoma de Barcelona

Centre National de la Recherche Scientifique

Universitat de Barcelona

Institut Català de Nanociència i Nanotecnologia

Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona

ETH Zurich

Centre de Recerca Matemàtica

Instituto de Ciencia de Materiales de Sevilla

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Supramolecular Conducting Nanowires from Organogels

Angewandte Chemie (2006)

Josep Puigmartí‐Luis V. N. Laukhin Ángel Pérez del Pino J. Vidal-Gancedo Concepció Rovira

Dotierte Drähte: Die Organisation der π-Einheiten von amidfunktionalisiertem Tetrathiafulvalen in einem Gel durch Wasserstoffbrücken führt zur Bildung von Nanofasern. Dotieren mit Iod erzeugt ein leitfähiges Material, das durch Tempern in Nanodrähte mit metallartiger Leitfähigkeit übergeht (siehe Rasterkraftmikroskopiebild). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2007/z602483_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

10.1002/ange.200602483

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Citations (57)

New fabrication method for producing reduced graphene oxide flexible electrodes by using a low-power visible laser diode engraving system

Nanotechnology (2020)

Alex Chuquitarqui Liviu Cosmin Cotet Monica Baia E. M. Gyorgy Klára Magyari

The fabrication of bendable electronic devices is a scientific-technological area of very rapid advance in which new materials and fabrication techniques are being continuously developed. In these kinds of devices, the fabrication of flexible conductive electrodes adherent to the substrate is a key factor. Further, eco-friendliness, low cost and fast production are essential requirements for the successful progress of new technologies. In this work, a novel method for obtaining graphene-based flexible electrodes is presented. Conductive films were obtained by means of the visible laser irradiation of graphene oxide layers deposited on polyethylene terephthalate substrates and self-standing membranes sandwiched between glass slides. Despite the low power of the laser system, the numerical simulations indicate the development of temperatures over 1000 K throughout the irradiated material. The laser-induced spatially confined heating leads to the reduction of the graphene oxide material, whereas the glass-based sandwich assembly avoids reoxidation from the surrounding air. By scanning and pixelated modes, reduced graphene oxide electrodes, up to 100 μm in thickness, and with a resistivity as low as 6 × 10-4 Ωm, were obtained in an easy and versatile way. Proof-of-concept microsupercapacitors and electrochemical sensors were fabricated with this technique, showing promising performance.

10.1088/1361-6528/ab8d67

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Citations (10)

Single pulse Nd:YAG laser irradiation of titanium: influence of laser intensity on surface morphology

Surface and Coatings Technology (2002)

E. M. Gyorgy I. N. Mihãilescu P. Serra Ángel Pérez del Pino J.L. Morenza

Vaporization

10.1016/s0257-8972(01)01699-1

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Citations (66)

Fabrication of graphene-based electrochemical capacitors through reactive inverse matrix assisted pulsed laser evaporation

Applied Surface Science (2019)

Ángel Pérez del Pino Mohamed Ahmed Ramadan Pablo García Lebière Raluca Ivan C. Logofatu

Non-blocking I/O

10.1016/j.apsusc.2019.04.127

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Citations (19)

Synthesis and Laser Immobilization onto Solid Substrates of CdSe/ZnS Core–Shell Quantum Dots

The Journal of Physical Chemistry C (2011)

E. M. Gyorgy Ángel Pérez del Pino Jaume Roqueta Belén Ballesteros Ana Sofia Miguel

CdSe/ZnS core–shell quantum dots (QDs) have been immobilized by ultraviolet matrix-assisted pulsed laser evaporation (UV-MAPLE) onto SiO2 glass substrates covered by silica thin films. The silica thin films were deposited by the sol–gel method. An UV KrF* (λ = 248 nm, τfwhm ≅ 25 ns) excimer laser source was used for the laser immobilization experiments. Toluene was chosen as solvent material for the preparation of the composite MAPLE targets. The surface morphology and growth mode of the deposited structures were investigated by optical and atomic force microscopy in acoustic (dynamic) configuration. The crystalline structure and chemical composition of the base material used for the preparation of the MAPLE targets as well as the laser transferred QDs were studied by transmission electron microscopy and energy dispersive X-ray spectroscopy. The functional properties of the immobilized QDs were studied by fluorescence microscopy. The immobilized materials form self-organized 2D arrays constituted by complex CdSe/ZnS core–shell QDs preserving the functional properties of the base material used for the preparation of the MAPLE targets.

10.1021/jp203051b

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Citations (17)

Meteorite Controlled Ablation Under Low Vacuum Studied Using Emission Spectroscopy: A Technique to Sample the Bulk Composition of Asteroids

Lunar and Planetary Science Conference (2021)

J. M. Trigo‐Rodríguez Ángel Pérez del Pino Eloy Peña‐Asensio Albert Rimola

Sample (material)

Laser Ablation

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Boost of Charge Storage Performance of Graphene Nanowall Electrodes by Laser-Induced Crystallization of Metal Oxide Nanostructures

ACS Applied Materials & Interfaces (2021)

Y. Esqueda-Barrón Ángel Pérez del Pino Pablo García Lebière Arevik Musheghyan-Avetisyan E. Bertrán

Major research efforts are being carried out for the technological advancement to an energetically sustainable society. However, for the full commercial integration of electrochemical energy storage devices, not only materials with higher performance should be designed and manufactured but also more competitive production techniques need to be developed. The laser processing technology is well extended at the industrial sector for the versatile and high throughput modification of a wide range of materials. In this work, a method based on laser processing is presented for the fabrication of hybrid electrodes composed of graphene nanowalls (GNWs) coated with different transition-metal oxide nanostructures for electrochemical capacitor (EC) applications. GNW/stainless steel electrodes grown by plasma enhanced chemical vapor deposition were decorated with metal oxide nanostructures by means of their laser surface processing while immersed in aqueous organometallic solutions. The pseudocapacitive nature of the laser-induced crystallized oxide materials prompted an increase of the GNW electrodes' capacitance by 3 orders of magnitude, up to ca. 28 F/cm3 at 10 mV/s, at both the positive and negative voltages. Finally, asymmetric aqueous and solid-state ECs revealed excellent stability upon tens of thousands of charge–discharge cycles.

10.1021/acsami.1c00951

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Citations (16)

Laser synthesis of NixZnyO/reduced graphene oxide/carbon nanotube electrodes for energy storage applications

Applied Surface Science (2021)

Pablo García Lebière Ángel Pérez del Pino C. Logofatu E. M. Gyorgy

Porous multicomponent surface layers consisting of bimetallic oxide nanoparticles, carbon nanomaterials reduced graphene oxide (GO) and multiwall carbon nanotubes (MWCNTs) were prepared by reactive inverse matrix assisted pulsed laser evaporation. The layers were tested as electrodes for supercapacitor devices. Bimetallic oxide nanoparticles were grown through the mixing of simple inorganic oxides and organic compounds in distilled water. A frequency quadrupled Nd:YAG laser was used for the irradiation of the target dispersions consisting of GO platelets, MWCNTs, NiO, and Zn acetate. Besides oxide nanoparticles synthesis, which were present both on the surface of GO platelets and MWCTs and were also encapsulated within the MWCNTs walls, the GO platelets used for the preparation of the target dispersion were reduced under the effect of the laser pulses. An enhancement of the electrochemical performances of the nanohybrid electrodes were obtained as a results of the formation of bimetallic oxide nanoparticles. The electrodes exhibit fast charge–discharge cycling rate and improved storage capacity as compared to compound layer counterparts containing carbon nanomaterials, reduced graphene oxide, carbon nanotubes and simple binary transition metal oxide nanoparticles, 40F/cm3 volumetric capacitance at 10 mV/s scan rate, 1.5 mW/cm3 energy density and 12 W/cm3 power density at 4 mA/cm3 current density.

Nanomaterials

Bimetallic strip

Carbon fibers

10.1016/j.apsusc.2021.150234

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Citations (13)

Supramolecular electroactive organogel and conducting nanofibers with C3-symmetrical architectures

Journal of Materials Chemistry (2009)

Ion Danila François Riobé Josep Puigmartí‐Luis Ángel Pérez del Pino John D. Wallis

Two C3 symmetric tris(TTF) derivatives, based on a central unit containing the rigid core 1,3,5-tricarbonyl-benzene substituted with three 3,3′-diamino-2,2′-bipyridines, have been synthesized by a convergent strategy. Single crystal X-ray analysis of the precursor 3′-[(ethylenedithio-tetrathiafulvalenyl)formylamino]-2,2′-bipyridine-3-amine shows a planar transoid conformation for the bipyridine unit, favored by intramolecular hydrogen bonding. The compound N,N′,N″-tris{3[3′-[bis(ethylthio)-tetrathiafulvalenyl]formylamino]-2,2′-bipyridyl}-benzene-1,3,5-tricarboxamide, having C3 symmetry, presents gelator properties in chlorinated solvents. The gel formed in ortho-dichlorobenzene provided—after evaporation of the solvent—a xerogel constituted by a complex network of thick and thinner fibers as demonstrated by TEM and AFM microscopies. The thick fibers were about 100 nm wide and between 1 and 5 µm long, and the thinner ones between 12 and 18 nm wide and 50 to 500 nm long. Iodine doping of the material induced the formation of a mixed valence system with charge transfer, as indicated by IR-NIR spectroscopic measurements. The doped material has a TTF:I3 ratio of 2.4:1 ten minutes after doping, but slowly loses iodine over days. The morphology of the gel did not change after the doping process, as revealed by SEM and AFM experiments. Current sensing AFM measurements showed that the thicker fibers are more conducting than the thinner ones, a likely consequence of the better ordering and/or more effective interfiber contacts in the former.

Bipyridine

10.1039/b822884a

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Citations (57)

Ultrafast Crystallization of Ce_0.9Zr_0.1O_2–y Epitaxial Films on Flexible Technical Substrates by Pulsed Laser Irradiation of Chemical Solution Derived Precursor Layers

Crystal Growth & Design (2015)

Albert Queraltó Ángel Pérez del Pino Marı́a de la Mata Jordi Arbiol X. Obradors

The epitaxial growth of Ce0.9Zr0.1O2–y (CZO) thin-films on yttria-stabilized zirconia (YSZ) (001) single crystal and YSZ (001)/stainless steel (YSZ/SS) technological substrates is investigated by pulsed laser irradiation of solution-derived cerium–zirconium precursor layers using a UV Nd:YAG laser source at atmospheric conditions. The influence of laser processing parameters on the morphological and structural properties of the obtained films is studied by atomic force and transmission electron microscopies, as well as X-ray diffractometry. The analyses performed demonstrate that laser treatments enable the epitaxial growth of tens of nanometers thick CZO films with a crystallization kinetic process several orders of magnitude faster than that of conventional thermal annealing. Fully epitaxial films are attained using stainless steel (SS) flexible tapes as a substrate. Even though photochemical mechanisms are not fully discarded, it is concluded that photothermal processes are the main contribution responsible for the fast epitaxial crystallization.

10.1021/acs.cgd.5b00115

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Citations (18)