Morphology nanoribbons

M. Terrones, A. R. Botello-Mendez, J. Campos-Delgado, F. Lopez-Urfas, Y. I. Vega-Cantu, F. J. Rodrfguez-Macias, A. L. Elias, E. Munoz-Sandoval, A. G. Cano-Marquez, J.-C. Charlier, FI. Terrones, Graphene and graphite nanoribbons Morphology, properties, synthesis, defects and applications., Nano Today, vol. 5, pp. 351-372, 2010. 

Figure 3 shows SEM micrographs of pure SDS obtained under the same conditions of deposition on the sample holder. The morphology and the topography of the particles are quite different from those observed for the LDH and the nanoribbons shown above. 

The above assumptions are supported by the results obtained by EDS, since a composition similar to the bulk phase was found just over the nanoribbons. Moreover, SEM micrographs of pure SDS showed different morphology from that of the nanoribbons. The results observed when the SDS-adsorbed material was washed or heated indicated that SDS molecules are present in the nanoribbons, since a quick water washing did not remove the nanoribbon images. 

D nanoribbons and nanowires of different metal-containing Pcs have also been prepared by organic vapor-phase deposition (OVPD), a technique used to fabricate organic millimeter-sized crystals, thin films, or nanostructures [211], Scanning electron microscopy (SEM), TEM, x-ray diffraction (XRD), and absorption measurement studies have revealed that the morphology of the nanostructures was strongly dependent on the chemical nature of the deposited macrocycle, the nature and the temperature of the substrate, and the source-to-substrate distance. 

The researchers observed a series of nanoprotrusions from spikes to blocks oriented perpendicular to the fiber axis. The mechanism for this process was similar to the crystallization mechanism of CNT growth from a surface. Carbon nanostructures from electrospun carbon nanofibers with iron and palladium nanoparticles were grown, respectively. In a later work, the type of carbon dictated the morphology of the resulting nanostructure. Toluene as the carbon source yielded straight nanotubes, pyridine gave coiled and Y-shaped nanotubes, and chlorobenzene formed nanoribbons. Figure 8.4 displays a variety of carbon nanostructures from rods to Y-shaped protrusions. 

Five methods of synthesis of CNTs are (1) arc discharge, (2) laser ablation, (3) CVD, (4) the HIPCO process, and (5) surface-mediated growth of vertically aligned tubes. CNTs can have different morphologies such as SWNT, DWNT, MWNT, nanoribbon, nanosheet, nanopeapods, linear and branched CNTs, conically overlapping bamboo-like Y-shaped tubules, nanopores, nanovoids, nanowire, and nanofiber. 

Presents the solids and crystals from the quantum nature perspective, in various instances, from bondonic particles on grapheme nanoribbons to geometric and morphologic characterization of crystals, to reciprocal space of electronic behavior, to chemical bonding driving crystals orderability to quantum observability by X-ray diffraction ... 

Titania powders not only with particulate morphology in different nano-sizes but also with fibrous morphology were synthesized. Even synthesis of nanotubes was reported under hydrothermal conditions from NaOH solution [26-30] and also nanofibers from KOH solution [31,32]. Both nanotubes and nanofibers thus prepared were later clarified to be protonated titania (titanate) [33-36]. A comprehensive review was published on protonated titanate nanotubes [37]. Effects of remnant sodium content and annealing temperature were studied on the structure and photoactivity of the nanotubes [38]. Titanate nanowires and nanoribbons were also reportedly formed [39,40]. Nano-sized Ti02 powders were obtained by annealing of titanate nanotubes and nanofibers [41]. Mesoporous anatase-type Ti02 powder was prepared by selective dissolution of silica component in Ti-Si binary oxides [42]. 

Terrones H (2010) Graphene and graphite nanoribbons morphology, properties, synthesis, defects and applications. Nano Today 5 351-372... 

Boron nanoribbons are also a different form of nanowires with a diverse morphology grown at relatively lower tanperatures. To the best of our knowledge, there are only two available articles on the synthesis of this particular type of nanostructure. Both of them described the structure as grasslike with fork-like slots in the middle. 

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