Published in Nature Communications
Here, the authors report optoelectronic mixing up to 67 GHz using high-frequency back-gated graphene field effect transistors (GFETs). These devices mix an electrical signal injected into the GFET gate and a modulated optical signal onto a single layer graphene channel.
Published in Plasma Physics Reports
AbstractThe process and applications of a specific type of gaseous discharge—beam–plasma discharge (BPD)—are reviewed. A brief survey of the BPD theory is presented. The basic features of BPD in active geophysical experiments with injection of electron beams into Earth’s ionosphere are discussed. Studies of the physics of BPD have revealed the effe...
Published in E3S Web of Conferences
A simple scheme for the realization of the terahertz (THz) fundamental-mode closed-stopband composite right/left-handed leaky-wave antennas (CRLH LWAs) is presented. The proposed CRLH LWAs are reconstructed by graphene-based coplanar waveguide (CPW) transmission line supercells. Their shunt inductances achieved by narrow graphene strips of two unit...
Published in Frontiers in Bioengineering and Biotechnology
Mesenchymal stem cell (MSC) derived extracellular vesicles (EV) are emerging as acellular therapeutics for solid organ injury and as carriers for drug delivery. Graphene-based materials are novel two-dimensional crystal structure-based materials with unique characteristics of stiffness, strength and elasticity that are being explored for various st...
Published in Zeitschrift für Naturforschung A
The Snyder-de Sitter (SdS) model which is invariant under the action of the de Sitter group, is an example of a noncommutative space-time with three fundamental scales. In this paper, we considered the massless Dirac fermions in graphene layer in a curved Snyder space-time which are subjected to an external magnetic field. We employed representatio...
Tato práce se zabývá simulacemi nanostruktur založených na uhlíku, s ohledem na jejich využití v elektronice. Nejprve je provedena rešerše současného stavu znalostí v oboru nanostruktur a jejich samosestavování, která obsahuje také výhled do budoucna. Dále je, dle dostupné literatury, rozebrána teorie transferu elektronů v molekulárních systémech a...
Published in Environmental technology
A simple voltammetric sensor was first constructed by dripping graphene (GR) on to the glass carbon electrode (GCE) and subsequently electro-polymerizing L-cysteine film. The sensor had a good voltammetric response to amaranth and linear in the range of 1.0 × 10-8-1.0 × 10-6 mol L-1. The detection limit of amaranth was 4.0 × 10-9 mol L-1 (S/N = 3)....
Published in Environmental technology
ABSTRACTThe graphene-coated iron oxide (GCIO) was used for the removal of Pb2+ and As3+ ions from aqueous solution. For the characterization of GCIO, several techniques (FTIR, XRD, EDX, SEM, TEM, TGA, DSC and vibrating sample magnetometry) were used which indicated the interaction of Pb2+ and As3+ with adsorbent. In addition, the effects of adsorba...
Published in Advanced materials (Deerfield Beach, Fla.)
Graphene quantum dots (GQDs) are carbon-based, nanoscale particles that exhibit excellent chemical, physical, and biological properties that allow them to excel in a wide range of applications in nanomedicine. The unique electronic structure of GQDs confers functional attributes onto these nanomaterials such as strong and tunable photoluminescence ...
Published in Nanotechnology Reviews
