218 citations · 880 across the 24 of their papers we have counts for
25 papers
Exotic Magnetic and Electronic Properties of Layered CrI3 Single Crystals Under High Pressure
Anirudha Ghosh, D. Singh, Qingge Mu +14
Through advanced experimental techniques on CrI single crystals, we derive a previously not discussed pressure-temperature phase diagram. We find that increases to $\…
Enhanced Raman Scattering on Functionalized Graphene Substrates
Václav Valeš, Petr Kovaříček, Michaela Fridrichová +5
The graphene-enhanced Raman scattering of Rhodamine 6G molecules on pristine, fluorinated and 4-nitrophenyl functionalized graphene substrates was studied. The uniformity of the Ra…
Addressing Raman features of individual layers in isotopically labeled Bernal stacked bilayer graphene
Sara D Costa, Johan Ek Weis, Otakar Frank +2
The most important bands for the evaluation of strain in graphene (the 2D and 2D prime modes) are investigated. It is shown that for Bernal-stacked bilayers, the two-phonon Raman f…
Controlled oxygen plasma treatment of single-walled carbon nanotube films improves osteoblast cells attachment and enhances their proliferation
Marie Kalbacova, Antonin Broz, Alexander Kromka +2
The effects of oxidative treatment of single-walled carbon nanotubes (SWCNTs) on the adhesion and proliferation of human osteoblasts (SAOS-2) were investigated. The surface propert…
Towards quantification of the ratio of the single and double wall carbon nanotubes in their mixtures:An In situ Raman spectroelectrochemical study
Zuzana Kominkovaa, Vaclav Vales, Mark C. Hersam +1
Mixtures containing different weight ratios of single wall carbon nanotubes (SWCNT) and double wall carbon nanotubes (DWCNT) were prepared and studied by in-situ Raman spectroelect…
Temperature and Face Dependent Copper-Graphene Interactions
Sara D. Costa, Johan Ek Weis, Otakar Frank +1
The interaction between graphene and metals represents an important issue for the large-area preparation of graphene, graphene transfer and the contact quality in graphene devices.…
Effect of layer number and layer stacking registry on the formation and quantification of defects in graphene
Sara D. Costa, Johan Ek Weis, Otakar Frank +1
Correct defect quantification in graphene samples is crucial both for fundamental and applied re-search. Raman spectroscopy represents the most widely used tool to identify defects…
Laser-ablation-assisted SF6 decomposition for extensive and controlled fluorination of graphene
Jan Plsek, Karolina Anna Drogowska, Michaela Fridrichov +2
We present a safe, clean, convenient, and easy-to-control method for extensive fluorination of graphene using laser-ablation-assisted decomposition of gaseous SF6 molecules.
Optical Near-Field Electron Microscopy
Raphaël Marchand, Radek Šachl, Martin Kalbáč +5
Imaging dynamical processes at interfaces and on the nanoscale is of great importance throughout science and technology. While light-optical imaging techniques often cannot provide…
Anomalous Freezing of Low Dimensional Water Confined in Graphene Nanowrinkles
Tim Verhagen, Jiri Klimes, Barbara Pacakova +2
Various properties of water are affected by confinement as the space-filling of the water molecules is very different from bulk water. In our study, we challenged the creation of a…
Strong Localization Effects in the Photoluminescence of Transition Metal Dichalcogenide Heterobilayers
Alvaro Rodriguez, Martin Kalbac, Otakar Frank
The emergence of various exciton-related effects in transition metal dichalcogenides (TMDC) and their heterostructures has inspired a significant number of studies and brought fort…
Coexistence of Van Hove Singularities and Pseudomagnetic Fields in Modulated Graphene Bilayer
Jana Vejpravova, Barbara Pacakova, Mildred S. Dresselhaus +2
The stacking and bending of graphene are trivial but extremely powerful agents of control over graphene's manifold physics. By changing the twist angle, one can drive the system ov…
Imaging Nanoscale Inhomogeneities and Edge Delamination in As-Grown MoS2 Using Tip-Enhanced Photoluminescence
Alvaro Rodriguez, Tim Verhagen, Martin Kalbac +2
Methods for nanoscale material characterization are in ever-increasing demand, especially those that can provide a broader range of information at once. Near-field techniques based…
Raman spectroscopy and In-situ Raman spectroelectrochemistry of isotopically engineered graphene systems
Otakar Frank, Mildred S. Dresselhaus, Martin Kalbac
The unique properties of graphene offer immense opportunities for applications to many scientific fields, as well as societal needs, beyond our present imagination. One of the impo…
Strain Assessment in Graphene Through the Raman 2D' Mode
Elena del Corro, Ladislav Kavan, Martin Kalbac +1
Accurate and simple local strain assessment in graphene is one of the crucial tasks in device characterization. Raman spectroscopy is often used for that purpose through monitoring…
Graphene under direct compression: stress effects and interlayer coupling
Elena del Corro, Miriam Pena-Alvarez, Michal Mracko +4
In this work we explore mechanical properties of graphene samples of variable thickness. For this purpose, we coupled a high pressure sapphire anvil cell to a micro-Raman spectrome…
Stress and charge transfer in uniaxially strained CVD graphene
Milan Bousa, George Anagnostopoulos, Elena del Corro +8
Mechanical properties of graphene prepared by chemical vapor deposition (CVD) are not easily comparable to the properties of nearly perfect graphene prepared by mechanical cleavage…
Evaluating arbitrary strain configurations and doping in graphene with Raman spectroscopy
Niclas S. Mueller, Sebastian Heeg, Miriam Peña Alvarez +13
Raman spectroscopy is a powerful tool for characterizing the local properties of graphene. Here, we introduce a method for evaluating unknown strain configurations and simultaneous…
Fine Tuning of Optical Transition Energy of Twisted Bilayer Graphene via Interlayer Distance Modulation
Elena del Corro, Miriam Peña-Alvarez, Kentaro Sato +8
Twisted bilayer graphene (tBLG) represents a family of unique materials with optoelectronic properties tuned by the rotation angle between the two layers. The presented work shows…
Graphene wrinkling induced by monodisperse nanoparticles: facile control and quantification
Jana Vejpravova, Barbara Pacakova, Jan Endres +5
Controlled wrinkling of single-layer graphene (1-LG) at nanometer scale was achieved by introducing monodisperse nanoparticles (NPs), with size comparable to the strain coherence l…
Formation of wrinkles on graphene induced by nanoparticles: atomic force microscopy study
Barbara Pacakova, Jana Vejpravova, Anton Repko +2
Wrinkles in monolayer graphene (GN) affect the GN electronic and transport properties. Defined network of wrinkles can be reached by placing the GN on the substrate decorated with…
Heating Isotopically Labelled Bernal Stacked Graphene: a Raman Spectroscopy Study
Johan Ek Weis, Sara Costa, Otakar Frank +1
One of the greatest issues of nanoelectronics today is how to control the heating of the components. Graphene is a promising material in this area and it is essential to study its…
Interaction between graphene and copper substrate: The role of lattice orientation
Otakar Frank, Jana Vejpravova, Vaclav Holy +2
We present a comprehensive study of graphene grown by chemical vapor deposition on copper single crystals with exposed (100), (110) and (111) faces. Direct examination of the as-gr…
The control of graphene double-layer formation in copper-catalyzed chemical vapor deposition
Martin Kalbac, Otakar Frank, Ladislav Kavan
The growth of graphene during Cu-catalyzed chemical vapor deposition was studied using 12CH4 and 13CH4 precursor gasses. We suggest that the growth begins by the formation of a mul…