In this work, the performance of graphene nanosheets (GNs) and graphene oxide (GO) nanosheets, as a support for palladium nanoparticles (PdNPs) toward oxygen reduction reaction (ORR), was studied. The graphene nanosheets were functionalized by a new and simple method. The PdNPs were synthesized on a glassy carbon electrode (GCE) modified with GNs or GO via a potentiostatic method; without using...

The effect of grapheme-nanosheets (GNs) on the mechanical properties and microstructure S390 HSS alloy was investigating. sample reinforced with 0.25, 0.5, 0.75 wt.% GNS. Powder metallurgy technique used to prepare all samples. elemental powders were milled in a planetary ball mill by 10:1 powder ratio speed 350 rpm for 48 hours, mixed warm compacted uni-axial press at 550?C under 500 MPa then ...

The new three-dimensional structure that the graphene connected with SWCNTs (G-CNTs, Graphene Single-Walled Carbon Nanotubes) can solve graphene and CNTs' problems. A comprehensive study of the mechanical and electrical performance of the junctions was performed by first-principles theory. There were eight types of junctions that were constituted by armchair and zigzag graphene and (3,3), (4,0)...

In this work, we have studied thermoelectric properties of monolayer and fewlayer MoS2 in both armchair and zigzag orientations. Density functional theory (DFT) using non-equilibrium Green's function (NEGF) method has been implemented to calculate the transmission spectra of mono- and fewlayer MoS2 in armchair and zigzag directions. Phonon transmission spectra are calculated based on parameteri...

In this work, nanocomposite membranes based on graphene and polylactide were evaluated for mechanical properties biocompatibility. Single-layer (SLG), nanosheets (GNS), poly L-lactic acid (PLLA) prepared through layer-by-layer deposition homogeneous mixing. The results revealed that PLLA/SLG nanocomposites PLLA/GNS could show enhanced addition of a tiny amount SLG significantly improved Young’s...

Hexamethyldisiloxane (HMDSO)/Graphene nanosheets (GNs) nanocomposite coatings were deposited by a dielectric barrier discharge at atmospheric pressure. Commercially available GNs incorporated into HMDSO precursor different concentrations up to 2 wt%. The analyzed using scanning electron microscopy (SEM) and nanoindentation test. Based on SEM images, it was found that the well distributed disper...

BACKGROUND Smad2 and Smad3 are transcription factors that mediate transforming growth factor beta (TGF-beta) signals. Upon their activation, phosphorylated Smad2/Smad3 (pSmad2/Smad3), translocate to the nucleus and associate with co-activators such as p300, regulating the transcription of genes that contribute to the fibrotic processes. METHODS We investigated the immunohistochemical expressi...

Low-cost, high-yield production of graphene nanosheets (GNs) is essential for practical applications. We have achieved high yield of edge-selectively carboxylated graphite (ECG) by a simple ball milling of pristine graphite in the presence of dry ice. The resultant ECG is highly dispersable in various solvents to self-exfoliate into single- and few-layer (≤ 5 layers) GNs. These stable ECG (or G...

Gold nanoshells (GNS) are novel metal nanoparticles exhibiting attractive optical properties which make them highly suitable for biophotonics applications. We present a novel investigation using plasmon-enhanced four wave mixing microscopy combined with coherent anti-Stokes Raman scattering (CARS) microscopy to visualize the distribution of 75 nm radius GNS within live cells. During a laser tol...