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Growth of Boron Nitride Nanotubes Having Large Surface Area Using Mechanothermal Process

World Journal of Nano Science and Engineering 2011年第4期1卷 119-128页

作者： sunil k. singhal Avanish k. Srivastava Rak.sh B. Mathur 不详

Nanostructures of boron nitride (BN) including nanotubes, nanofibers and nanosheets having a large surface area are very useful in storing hydrogen and other gases. In the present paper we report the synthesis and characterization of these nanostructures of BN using mechanothermal process. Under this process elemental boron powder is first ball milled to about 50 h in an inert atmosphere and then annealed at 1100℃ - 1250℃ for 6 h in the presence of NH3 gas. By this treatment nanotubes and other nanostructures of BN were synthesized. The diameter of BN nanotubes varied from 20 to 50 nm and most of them exhibited spindle or bamboo lik. morphology. Because of the large surface area, these nanotubes may be explored for a better hydrogen gas storage device as compared to the crystallized nanotubes. The main advantage of this technique is that the nanotubes can be grown in large quantity. A possible growth mechanism towards the evolution of such fascinating nano-objects of boron nitride has been discussed employing high-resolution transmission electron microscopy and photoluminescence.

关键词： Boron Nitride Nanotubes Mechanothermal Process Morphology Photo Luminescence

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Metastatic Primary Pulmonary Angiosarcoma

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Surgical Science 2011年第3期2卷 130-133页

作者： Brendan F. Judy Jarrod D. Predina Jay Mittal Charuhas Deshpande sunil singhal 不详

Angiosarcoma is an extremely aggressive tumor with a high rate of mortality. It can arise in any tissue of the body and is most commonly found in the sk.n and soft tissue[1]. Pulmonary angiosarcoma is usually secondary to a primary location of the body and presents as both solitary and multiple nodules. Primary pulmonary angiosarcoma is a rare disease with less than 20 cases reported in the English literature. In our report we present a case of metastatic primary pulmonary angiosarcoma involving the most ( > 100) pulmonary nodules k.own to date. Novel treatment strategy using an anti-angiogenic inhibitor was used to treat this disease for the first time to our k.owledge;however, it was unsuccessful in controlling disease progression. This report reviews the literature of this rare and devastating disease.

关键词： Angiosarcoma Pulmonary Tumor Surgery

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