Nanofiber growth

Atomic-scale Monitoring of Carbon Nanofiber Growth in Steam Reforming Catalysts... 

Examples of HRTEM movies of the carbon nanofiber growth from Reference (52) can be found at http //www.haldortopsoe.com/site.nsf/pages/nanotechnology. 

The possibility of well-defined nanofiber growth on muscovite starting with substituted oligomers that is, fiber growth is not prevented by the functional groups but is even improved in some cases. 

Dipl.-Chem. Ivonne Wallmann (University of Bonn) provided additional organic molecules for nanofiber growth in the context of her diploma thesis. 

The growth mechanism of carbonaceous nanostructural materials is generally thought to be via VLS. Cite some recent examples of carbon nanombe/nanofiber growth at temperatures far below the melting point of the nanoparticulate catalyst species. 

Abild-Pedersen F, Norskov JK, Rostrup-Nielsen JR, Sehested J, Helveg S (2006) Mechanisms for catalytic carbon nanofiber growth studied by ab initio density functional theory calculations. Phys Rev B 73... 

Hwang, W., Kim, B.H., Dandu, R. et al. (2009) Surface induced nanofiber growth by self-assembly of a silk-elastin-Uke protein polymer. Langmuir, 25, 12682-12686. 

Teo KBK, Hash DB, Lacerda RG, Rupesinghe NL, Bell MS, Dalai SH, et al. The significance of plasma heating in carbon nanotube and nanofiber growth. Nano Lett... 

In another study, the so-called sohd-liquid-solid (SLS) technique was used to prepare a silicon oxide nanofiber surface [64]. The amorphous sihcon oxide nanofibers shown in Fig. 10b were made by heating a silicon substrate coated with a thin gold layer at 1100°C for 3 h in a lutrogen atmosphere in contrast to the previous example, no additional source of silicon materials was used in this case. As before, the nanofiber growth starts at the interface of the Au/Si alloy droplet and the Si substrate and is maintained by the diffusion of the Si atoms from the substrate to the interface [65]. The surface was then UV/ozone-treated to generate surface hydroxyl groups that were subsequently reacted with perfluorodecyltrichlorosilane. The chemically modified nanofiber surface exhibited a WCA of 152°. 

Nanofiber growth Very high surface-to-volume ratio Single nanoflbers limited reproducibility. Difficult to assemble into real-world devices... 

Celebi, S., Nijhnis, T., van der Schaaf, J., et al. (2011). Carbon Nanofiber Growth on Carbon Paper for Proton Exchange Membrane Enel, Carbon, 49, pp. 501—507. 

Figure 8.12. Nanofiber growth At high temperatures, and in the presence of a catalyst, vapor phase hydrocarbon molecules dissociate. This process is the base of the growth mechanism on the atomic scale [99].

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