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Using ethanol as a precursor, single-crystal bilayer graphene domains with dimensions up to hundreds of micrometer, one of the largest reported so far, were synthesized on Cu foils by chemical vapor deposition (CVD). Raman spectroscopy analysis revealed that the bilayers are homogeneously AB-stacked, with very low D-band intensity. Selected area electron diffraction analysis also confirmed the bernal...
We show that graphene single crystals as large as 5mm can be synthesized from ethanol via chemical vapor deposition (CVD). Key conditions for the successful reduction in nucleation density are extremely low partial pressure of ethanol vapor and pre-oxidation of Cu substrates. The resulting graphene flakes are predominantly homogeneous single-layer hexagons, as characterized by Raman spectroscopy and...
Functionalized mesoporous carbon catalysts can be used in the acid catalyzed dehydration of fructose to 5-hydroxymethyl furfural (HMF). However, strong deactivation can be observed after preconditioning of the material in the reaction solvent 2-butanol. Surface changes caused by the pretreatment have been studied by XPS. The comparison of the pristine sample and the pretreated carbon sample showed...
Graphene oxide nanoplatelets (GONPs) are presented as electrochemical active materials for VO 2+ /VO2+ and V 2+ /V 3+ redox couples for a vanadium redox flow battery. The structures and electrochemical properties of GONPs treated at different temperatures were investigated by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray...
The effects of multiwalled carbon nanotubes (MWCNTs) and fullerene C60 (C60) on staining of rat astrocytes by 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethylbenzimidazolcarbocyanine iodide (JC-1), 3,3′-dihexyloxacarbocyanine, iodide (DiOC6(3)), rhodamine 123 (Rho 123) and fluorescein diacetate (FDA) were investigated. Probe indications were characterized and probe staining performed both in an “in situ”...
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