Exploració per tema "Grafè"

Ara es mostren els items 1-20 de 130

    • 235. Un campus d'exel.lència internacional per a un nou model energètic 

      Universitat Politècnica de Catalunya. Rectorat (Oficina de Mitjans de Comunicació, 2010-11)
      Article
      Accés obert

    • A novel graphene nanoribbon XOR gate design 

      Rallis, Konstantinos; Sirakoulis, Georgios Ch.; Karafyllidis, Ioannis; Rubio Sola, Jose Antonio; Dimitrakis, Panagiotis (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Graphene is a 2D material with spectacular properties. Its elasticity and biocompatibility make it appropriate for stretchable electronics and bioelectronics applications respectfully. In this work, we present the design ...

    • A reprogrammable graphene nanoribbon-based logic gate 

      Rallis, Konstantinos; Fyrigos, Iosif-Angelos; Dimitrakis, Panagiotis; Dimitrakopoulos, George N.; Karafyllidis, Ioannis; Rubio Sola, Jose Antonio; Sirakoulis, Georgios Ch. (2023)
      Article
      Accés obert
      In this article, taking into consideration the exceptional technological properties of a unique 2-D material, namely Graphene, we are envisioning its usage as the structure material of a non-back-gated re-programmable ...

    • Adhesion and friction control localized folding in supported graphene 

      Zhang, Kuan; Arroyo Balaguer, Marino (American Institute of Physics (AIP), 2013-05)
      Article
      Accés restringit per política de l'editorial
      Graphene deposited on planar surfaces often exhibits sharp and localized folds delimiting seemingly planar regions, as a result of compressive stresses transmitted by the substrate. Such folds alter the electronic and ...

    • Análisis estructural de óxidos de grafeno (GO) y óxidos de grafeno reducidos (rGO) 

      Colom Fajula, Xavier; Cañavate Ávila, Francisco Javier; Lis Arias, Manuel José; Sanjuan, Gemma; Gil Galí, Ignacio (2020-07-01)
      Article
      Accés obert
      El artículo caracteriza a nivel estructural, morfológico y térmico tres muestras distintas de óxido de grafeno comerciales (AGO, EGO y CGO) obtenidas mediante el método Hummers, las cuales han sido posteriormente reducidas ...

    • Application of graphene-based materials 

      Antunes, Marcelo de Sousa Pais (2023-10-12)
      Article
      Accés obert

    • Boosting moisture induced electricity generation from graphene oxide through engineering oxygen-based functional groups 

      Zhu, Renbo; Zhu, Yanzhe; Chen, Fandi; Patterson, Robert; Zhou, Yingze; Wan, Tao; Hu, Long; Wu, Tom; Joshi, Rakesh; Li, Mengyao; Cazorla Silva, Claudio; Lu, Yuerui; Han, Zhaojun; Chu, Dewei (2022-04-01)
      Article
      Accés obert
      Harvesting energy from ubiquitous moisture is attracting growing interest for directly powering electronic devices. However, it is still challenging to fabricate high-performing moisture-electric generators (MEGs) with ...

    • Bridging NiCo layered double hydroxides and Ni3S2 for bifunctional electrocatalysts: the role of vertical graphene 

      Xiao, Zhang; Fan, Jiajun; Lu, Xunyu; Han, Zhaojun; Cazorla Silva, Claudio; Hu, Long; Wu, Tom; Chu, Dewei (2021-07-01)
      Article
      Accés obert
      In this work, we report a bifunctional electrocatalyst with nickel sulphide (Ni3S2) as the template, vertical graphene (VG) as the bridging material, and nickel–cobalt layered double hydroxides (NiCo LDHs) nanosheets as ...

    • Broadband conductivity of graphene from DC to THz 

      Rouhi, N.; Jain, D.; Capdevila Cascante, Santiago; Jofre Roca, Lluís; Brown, E.; Burke, P.J. (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper for the first time we have studied the broadband sheet conductance of few-layer graphene on single-crystal quartz substrate. Few-layer graphene was grown on Nickel coated Si wafers and transferred to the ...

    • Caracterització optoelectrònica del grafè sobre diferents substrats a altes freqüències 

      Gabriel Cortés, Daniel (Universitat Politècnica de Catalunya, 2014-09-09)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This project presents a study for both optic and electronic properties of graphene and possible variations of different physical magnitudes that are produced in a material when a single layer of graphene is deposited ...

    • Chondroinductive alginate-based hydrogels having graphene oxide for 3D printed scaffold fabrication 

      Olate Moya, Felipe; Mateos Timoneda, Miguel Ángel; Engel López, Elisabeth; Arens, Lukas; Wilhelm, Manfred; Palza, Humberto (2020-01-07)
      Article
      Accés obert
      Scaffolds based on bioconjugated hydrogels are attractive for tissue engineering because they can partly mimic human tissue characteristics. For example, they can further increase their bioactivity with cells. However, ...

    • Coexistence of wrinkles and blisters in supported graphene 

      Zang, Kuan; Arroyo Balaguer, Marino (Elsevier, 2017-07-01)
      Article
      Accés obert
      Blisters induced by gas trapped in the interstitial space between supported graphene and the substrate are commonly observed. These blisters are often quasi-spherical with a circular rim, but polygonal blisters are also ...

    • Colloidal Quantum Dot Tandem Solar Cells Using CVD Graphene as An Atomically Thin Intermediate Recombination Layer 

      Bi, Yu; Pradhan, Santanu; Akgul, Mehmet Zafer; Gupta, Shuchi; Stavrinadis, Alexandros; Wang, Jianjun; Konstantatos, Gerasimos (ACS, 2018-06-28)
      Article
      Accés obert
      Two-terminal tandem cell architectures are believed to be an effective way to further improve the power conversion efficiency in solution processed photovoltaics. To design an efficient tandem solar cell, two key issues ...

    • Competing Ultrafast Energy Relaxation Pathways in Photoexcited Graphene 

      Jensen, S. A.; Mics, Z.; Ivanov, I.; Varol, H. S.; Turchinovich, D.; Bonn, M.; Tielrooij, K. J. (ACS Publications, 2014-09-23)
      Article
      Accés obert

    • Contactless electrical resistance of 2D materials using a rutile resonator 

      Arcos Gutiérrez, David; Krkotic, Patrick; O'Callaghan Castellà, Juan Manuel; Pont, Montse; Ametller Congost, Lluís; Ferrer Anglada, Núria (2019-12-12)
      Article
      Accés obert
      Measuring the electrical surface resistance of 2D materials without contact can provide a method for obtaining their intrinsic characterisation. The aim of this paper is to show that a rutile dielectric resonator (RDR) can ...

    • Controlling mid-infrared plasmons in graphene nanostructures through post-fabrication chemical doping 

      Paulillo, Bruno; Bareza, Nestor, Jr.; Pruneri, Valerio (IOP, 2021-05-07)
      Article
      Accés obert
      Engineering the doping level in graphene nanostructures to yield controlled and intense localized surface plasmon resonance (LSPR) is fundamental for their practical use in applications such as molecular sensing for point ...

    • Current characteristics of defective GNR nanoelectronic devices 

      Rallis, Konstantinos; Dimitrakis, Panagiotis; Sirakoulis, Georgios Ch.; Rubio Sola, Jose Antonio; Karafyllidis, Ioannis (2022)
      Text en actes de congrés
      Accés obert
      The most promising Graphene structures for the development of nanoelectronics and sensor applications are Graphene nanoribbons (GNRs). GNRs with perfect lattices have been extensively investigated in the research literature; ...

    • Digital metasurface based on graphene: An application to beam steering in terahertz plasmonic antennas 

      Hosseininejad, Seyed Ehsan; Rouhi, Kasra; Neshat, Mohammad; Cabellos Aparicio, Alberto; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José (2019-06-25)
      Article
      Accés obert
      Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful capabilities on manipulation of electromagnetic waves. Recent times have seen the emergence of a variety ...

    • Direct growth of 2D and 3D graphene nano-structures over large glass substrates by tuning a sacrificial Cu-template layer 

      Marchena, Miriam; Song, Zhen; Senaratne, Wageesha; Li, Connie; Liu, Xinyuan; Baker, David; Canet Ferrer, Josep; Mazumder, Prantik; Soni, Kamal; Lee, Robert; Pruneri, Valerio (IOP, 2017-03-28)
      Article
      Accés obert
      We demonstrate direct growth of two-dimensional (2D) and three-dimensional (3D) graphene structures on glass substrates. By starting from catalytic copper nanoparticles of different densities and using chemical vapour ...

    • Double-layer graphene for enhanced tunable infrared plasmonics 

      Rodrigo, Daniel; Tittl, Andreas; Lima, Odeta; García de Abajo, Francisco Javier; Pruneri, Valerio; Altug, Hatice (Nature, 2017-06-02)
      Article
      Accés obert
      Graphene is emerging as a promising material for photonic applications owing to its unique optoelectronic properties. Graphene supports tunable, long-lived and extremely confined plasmons that have great potential for ...