Nanopartide carbon nanotubes

A different approach can be used to induce nanopartide self-assembly on surfaces or matrixes both by electrostatic interactions and chemical bonding between a functionalized nanoparticle and a surface. This is a vast area of research in which many types of substrates like Si, Si02, Ti02, A1203, MgO, carbon nanotubes, and so... 

The high dispersity inside the nano-honeycomb matrix and the high surface area of the nanopartides leads to very good electrocatalytic activity. The electrocatalytic activities of nanosized platinum particles for methanol, formic add and formaldehyde electrooxidation have been recently reported [215]. The sensitivity of the catalyst particles has been interpreted in terms of a catalyst ensemble effect but the detailed microscopic behaviour is incomplete. Martin and co-workers [216] have demonstrated the incorporation of catalytic metal nanopartides such as Pt, Ru and Pt/Ru into carbon nanotubes and further used them in the electrocatalysis of oxygen reduction, methanol electrooxidation and gas phase catalysis of hydrocarbons. A related work on the incorporation of platinum nanopartides in carbon nanotubes has recently been reported to show promising electrocatalytic activity for oxygen reduction [217]. 

The methods of preparation discussed above do not involve any template, and the nanopartides of the oxide or the trisulfide act as nucleation centers for tube growth. Recently, CNTs have been used as templates to grow MoSj, WS, and NbSj coated carbon nanotubes, some of which contain 1-2 layers of the chalcogenide at the exterior. The CNTs were coated with the metal oxide or its precursor and treated in a HjS/Hj/Nj atmosphere at elevated temperatures to convert the oxide to the sulfide. However, the CNT core was not removed in the nanostructures (Fig. 15). 

Ham HT, Choi YS, Chee MG et al (2006) Singlewall carbon nanotubes covered with polystyrene nanopartides by in-situ miniemulsion polymerization. J Polym Sd Ptirt A Polym Chem 44 573-584... 

N.A., Alexander, M., Vaia, R.A., 2004. Remotely actuated polymer nancxomposites—stress-recovery of carbon-nanotube-filled thermoplastic elastomers. Nat Mater. 3, 115-120. Copyright 2004, Macmillan Publishers Ltd. (B) Reproduced with permission from reference Yu, A., Meiser, F., Cassagneau, T., Caruso, F., 2004. Fabrication of polymer-nanopartide composite inverse opals by a one-step electrochemical co-deposition process. Nano Lett 4, 177-181. Copyright 2004, American Chemical Society. (C) Reproduced with permission from reference Fie, X., Shi, Q., Zhou, X., Wan, C., Jiang,... 

Plasma Treatment of Nanopartides and Carbon Nanotubes for Nanofluids,... 

Plasma Treatment of Nanopartides and Carbon Nanotubes for Nanofluids, Fig. 3 Pictorial view of the plasma reactor system... 

Plasma Treatment of Nanopartides and Carbon Nanotubes for Nanofluids, Table 1 The contact angle (6) and its surface energy of untreated and treated (CH4 02 = 1 1, 60 mTorr, 4 W RF power) diamond nanopartides. Surface energy of each solvent is yi = 71.99, yT = 23.46, and y " = 17.89. and ys are the surface energies contributed... 

Single crystal nanowires (SNW) are one-dimensional single crystal nanopartides like fullerenes vs. carbon nanotubes. While retaining the properties of nanopartides, SNW have been made into functional devices such as transistors, nanoelectrode arrays, and probes for biological sensing. Depending on the materials type and diameter, SWN and devices can be made electrically, optically, or magnetically functional. 

W. Xia, X. Chen, S. Kundu, X. Wang, G. Grundmeier, Y. Wang, M. Bron, W. Schuhmann, M. Muhler, Chemical vapor synthesis of secondary carbon nanotubes catalyzed by iron nanopartides electrodeposited on primary carbon nanotubes. Surf. Coat. Technol. 201 (2007) 9232-9237. 

As demonstrated in our work for the preparation of nanopartide catalysts, the molecular encapsulation-based synthesis and processing strategy involves a sequence of three steps for to the preparation of multimetallic catalysts (1) chemical synthesis of the metal nanocrystal cores with molecular encapsulation, (2) assembly of the encapsulated nanoparticles on support materials (e.g., carbon powders or carbon nanotubes), and (3) thermal treatment of the supported nanoparticles [75,77,151], Scheme 11,2 depicts the general concept of the nanocatalyst preparation strategy. 

Figure 3.6 Functionalization of carbon nanotube and the deposition of Pt nanopartides [34],...

Influence of the surfece treatment on the deposition of platinum nanopartides on the carbon nanotubes. Advanced Engineering Materials, 8 (1-2),... 

Bahadiu, (., Sen, D., Mazumder, S., Parkash, (., Sathiyamoorlhy, D., and Venugopalan, R. (2010) Decoration of carbon nanotubes with metal nanopartides by wet chemical method a small-angle neutron scattering study. 

The mechanisms of engineered photoactive nanomaterials-induced toxicity apply only partially to amorphous silica nanoparticles, mainly because their composition and structure differ from those of quantum dots, metal nanoparticles, carbon nanotubes and quartz nanoparticles. The amorphous structure and nontoxic composition provide amorphous siUca nanoparticles with a significant advantage-that is, the nanoparticle has a relatively low toxicity compared to the above-mentioned photoactive nanomaterials. Until now, studies on the toxicity of siUca nanopartides have been reported both in vitro and in vivo, as discussed below. 

Chromium adsorption by aligned carbon nanotubes supported ceria nanopartides. Chemosphere, 62, 861-5. 

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