A5090508268- Graphene research and applications
- Graphene and Nanomaterials Applications
- Molecular Junctions and Nanostructures
- Plasmonic and Surface Plasmon Research
- Advanced biosensing and bioanalysis techniques
- Diamond and Carbon-based Materials Research
- Nanowire Synthesis and Applications
- 2D Materials and Applications
- Analytical Chemistry and Sensors
- Quantum and electron transport phenomena
- Nanoparticles: synthesis and applications
- Carbon Nanotubes in Composites
- Thermal properties of materials
- Gas Sensing Nanomaterials and Sensors
- Biosensors and Analytical Detection
- Advancements in Semiconductor Devices and Circuit Design
- Surface and Thin Film Phenomena
- Nanopore and Nanochannel Transport Studies
- Photonic and Optical Devices
- Electrochemical Analysis and Applications
- Metamaterials and Metasurfaces Applications
- Tribology and Wear Analysis
- Gold and Silver Nanoparticles Synthesis and Applications
- Advancements in Battery Materials
- Fuel Cells and Related Materials
Graphenea (Spain)
2016-2025
Physikalisch-Technische Bundesanstalt
2021
Technische Universität Berlin
2021
Friedrich Schiller University Jena
2021
Ayuntamiento de San Sebastián
2014-2020
University of Strathclyde
2001-2005
Thermal conductivity of free‐standing reduced graphene oxide films subjected to a high‐temperature treatment up 1000 °C is investigated. It found that the annealing dramatically increases in‐plane thermal conductivity, K , from ≈3 ≈61 W m −1 at room temperature. The cross‐plane ⊥ reveals an interesting opposite trend decreasing very small value ≈0.09 in annealed °C. obtained demonstrate exceptionally strong anisotropy K/K ≈ 675, which substantially larger even than high‐quality graphite....
Graphene plasmons promise unique possibilities for controlling light in nanoscale devices and merging optics with electronics. We developed a versatile platform technology based on resonant optical antennas conductivity patterns launching control of propagating graphene plasmons, an essential step the development plasmonic circuits. launched focused infrared geometrically tailored observed how they refracted when passing through two-dimensional pattern, here prism-shaped bilayer. To that...
Abstract Real-time, high resolution, simultaneous measurement of multiple ionic species is challenging with existing chromatographic, spectrophotometric and potentiometric techniques. Potentiometric ion sensors exhibit limitations in both resolution selectivity. Herein, we develop wafer scale graphene transistor technology for overcoming these limitations. Large area an ideal material sensitive field effect transistors (ISFETs), while simultaneously enabling facile fabrication as compared to...
The significant progress in terms of fabricating large-area graphene films for transparent electrodes, barriers, electronics, telecommunication and other applications has not yet been accompanied by efficient methods characterizing the electrical properties graphene. While early prototyping as well research development phases, test devices created conventional lithography have provided adequate insights, this approach is becoming increasingly problematic due to complications such...
Strategies employed to interface biomolecules with nanomaterials have considerably advanced in recent years and found practical applications many different research fields. The construction of nucleic acid modified interfaces together the label-free detection hybridization events has been one major focuses science technology. In this paper, we demonstrate high interest graphene-on-metal surface plasmon resonance (SPR) for DNA attomolar concentration range. strategy consists on noncovalent...
The development of non-antibiotic based treatments against bacterial infections by Gram-negative uropathogenic E. coli is a complex task. New strategies to treat such are thus urgently needed. This report illustrates the pegylated reduced graphene oxide nanoparticles (rGO-PEG) and gold nanorods (Au NRs) coated with rGO-PEG (rGO-PEG-Au for selective killing UTI89. We took advantage excellent light absorption properties Au NR particles in near-infrared (NIR) region photothermally kill...
Graphene and graphene oxide receive much attention these years, because they add attractive properties to a wide range of applications products. Several studies have shown toxicological effects other carbon‐based nanomaterials such as carbon black nanoparticles nanotubes in vitro vivo. Here, we report in‐depth physicochemical characterization three commercial materials, one (GO) two reduced oxides (rGO) assess cytotoxicity genotoxicity the murine lung epithelial cell line FE1. The studied GO...
Abstract The poor thermal conductivity of polymer composites has long been a deterrent to their increased use in high-end aerospace or defence applications. This study describes new approach for the incorporation graphene an epoxy resin, through addition as free-standing film polymeric matrix. electrical and embedding two different films was compared with embedded carbon nanotube buckypapers (CNT-BP). Considerably higher values than those achieved conventional dispersing methods CNTs resins...
We investigated toxicity of 2-3 layered >1 μm sized graphene oxide (GO) and reduced (rGO) in mice following single intratracheal exposure with respect to pulmonary inflammation, acute phase response (biomarker for risk cardiovascular disease) genotoxicity. In addition, we assessed levels particulate matter emitted during production a clean room normal industrial environment using chemical vapour deposition. Toxicity was evaluated at day 1, 3, 28 90 days (18, 54 162 μg/mouse), except GO...
Iridium and ruthenium their oxides/hydroxides are the best candidates for oxygen evolution reaction under harsh acidic conditions owing to low overpotentials observed Ru- Ir-based anodes high corrosion resistance of Ir-oxides. Herein, by means cutting edge operando surface bulk sensitive X-ray spectroscopy techniques, specifically designed electrode nanofabrication ab initio DFT calculations, we were able reveal electronic structure active IrOx centers (i.e., oxidation state) during...
Abstract The commercialization of electronic devices based on graphene has not yet been successful, even 20 years after its first isolation. To this end, the European Commission is supporting research toward establishing a experimental pilot line for and optoelectronic related two-dimensional (2D) materials, namely Experimental Pilot Line (2D-EPL) project. Here, we report results obtained during third multi-project wafer (MPW) runs completed at end 2022 (MPW run 1) 2023 3) as an outcome...
Fabricating stable functional devices at the atomic scale is an ultimate goal of nanotechnology. In biological processes, such high-precision operations are accomplished by enzymes. A counterpart molecular catalyst that binds to a solid-state substrate would be highly desirable. Here, we report direct observation single Si adatoms catalyzing dissociation carbon atoms from graphene in aberration-corrected high-resolution transmission electron microscope (HRTEM). The atom provides catalytic...
The refractive index and extinction coefficient of chemical vapour deposition grown graphene are determined by ellipsometry analysis. Graphene films were on copper substrates transferred as both monolayers bilayers onto SiO2/Si using standard manufacturing procedures. nature thickness residual debris formed after the transfer process elucidated photoelectron spectroscopy. real layered structure so deduced has been used instead nominal one input in analysis monolayer bilayer graphene, native...
Contact resistance is one of the main factors limiting performance short-channel graphene field-effect transistors (GFETs), preventing their use in low-voltage applications. Here we investigated contact between grown by chemical vapor deposition (CVD) and different metals, found that etching holes below contacts consistently reduced resistance, down to 23 m with Au contacts. This low was obtained at Dirac point graphene, contrast previous studies where lowest highest carrier density (here...
The reliability of analysis is becoming increasingly important as point-of-care diagnostics are transitioning from single-analyte detection toward multiplexed multianalyte detection. Multianalyte benefits greatly complementary metal-oxide semiconductor (CMOS) integrated sensing solutions, offering miniaturized arrays with readout electronics and extremely large sensor counts. development CMOS back end line integration compatible graphene field-effect transistor (GFET)-based biosensing has...
We demonstrate wafer-scale, non-contact mapping of essential carrier transport parameters, mobility (µdrift), density (Ns), DC sheet conductance (σdc), and scattering time (τsc) in CVD graphene, using spatially resolved terahertz time-domain spectroscopy. σdc τsc are directly extracted from Drude model fits to spectra obtained each pixel 10 × cm2 maps with a 400 µm step size. σdc- τsc-maps translated into µdrift Ns through Boltzmann theory for graphene charge carriers these parameters...
We describe the fabrication and characterisation of a capacitive pressure sensor formed by an ultra-thin graphene–polymer heterostructure membrane spanning large array micro-cavities each up to 30 μm in diameter with 100% yield.