B-C-N Nanotubes and Related Nanostructures by Chee Huei Lee, Vijaya K. Kayastha (auth.), Yoke Khin Yap

By Chee Huei Lee, Vijaya K. Kayastha (auth.), Yoke Khin Yap (eds.)

Carbon nanotubes (CNTs) and Boron nitride nanotubes (BNNTs) are a part of the so-called B-C-N fabric method, together with novel nanostructures of carbon (C), doped-carbon, boron (B), boron nitride (BN), carbon nitride (CNx), boron-carbon nitride (BxCyNz), and boron carbide (BxCy). BNNTs and CNTs are structurally comparable and percentage amazing mechanical houses, yet they vary in chemical, organic, optical, and electric houses. for that reason, hybrid nanotubes built of B, C, N parts are anticipated to shape a brand new type of nanotubes with tunable houses among these of CNTs and BNNTs. additionally, those B-C-N nanostructures will extra increase and supplement the functions of CNTs and BNNTs. With contributions from best specialists, B-C-N Nanotubes and similar Nanostructures is the 1st ebook to hide all theoretical and experimental elements of this rising fabric process, and meets the necessity for a finished precis of the super advances in learn on B-C-N fabrics in recent times.

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BNNTs are always semiconducting with a wide bandgap that is almost independent of the tube diameter and chirality. Moreover, the ionic character of B–N bonds may induce extra dipole moments favorable for stronger adsorption of hydrogen. The binding and diffusion energies of adsorbed hydrogen have recently been computed [65], and BNNTs were found to be suitable for room-temperature hydrogen storage. Also, diffusion through the active sites makes hydrogen penetration toward the inner BNNT surface possible and increases the storage capacity.

It has been shown theoretically that CNTs doped with exotic elements may alter the band structure and morphological properties of CNTs [143]. There have been some experimental works on boron-doped CNTs [144, 145] and nitrogen-doped CNTs [146, 147] have been demonstrated. For example, nitrogendoping was shown to enhance electron field emission properties of multiwalled CNTs [148]. The chapter by Filho and Terrones highlights the research on doped CNTs. Acknowledgment Y. K. S. S. Department of Army (W911NF-04-1-0029) and the Defense Advanced Research Projects Agency (DAAD17-03-C-0115 through Army Research Laboratory) for supporting his projects on CNTs.

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