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Investigators from National Taiwan University Zero in on Fullerenes (New developments in the growth of 4 Angstrom carbon nanotubes in linear channels...

August 1, 2014



Investigators from National Taiwan University Zero in on Fullerenes (New developments in the growth of 4 Angstrom carbon nanotubes in linear channels of zeolite template)

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Fullerenes are discussed in a new report. According to news reporting from Taipei, Taiwan, by NewsRx journalists, research stated, "We report new developments on the chemical vapor deposition growth of 0.4 nm singlewalled carbon nanotubes (SWCNTs) inside the linear channels of the aluminophosphate zeolite, AlPO4-5 (API), single crystals (0.4 nm-SWCNT@AFI). Ethylene (C2H4) and carbon monoxide (CO) were used as the feedstock."

The news correspondents obtained a quote from the research from National Taiwan University, "Polarized Raman spectroscopy was used to analyze the structure and quality of SWCNTs, both the radial breathing mode and G-band are much clearer and stronger than the samples grown by the old process which used template tripropylamine molecules for growing SWCNT@AFI. From the Raman spectra, it is clearly seen that the RBM is composed of two peaks at 535 and 551 cm(-1). By using the pseudopotential module in Material Studio to calculate the Raman lines, the 535 cm(-1) peak is attributed to the (5,0) SWCNTs and the 551 cm(-1) peak to the (3,3) SWCNTs. The abundance of (4,2) is relatively small."

According to the news reporters, the research concluded: "Thermal gravity analysis showed that while the samples grown by CO display less than 1 wt% of carbon, for the samples heated in C2H4 atmosphere the weight percentage of SWCNTs is around 10%, which implies similar to 30% of the API channels are occupied with SWCNTs, a significant increase compared with the previous samples."

For more information on this research see: New developments in the growth of 4 Angstrom carbon nanotubes in linear channels of zeolite template. Carbon, 2014;76():401-409. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

Our news journalists report that additional information may be obtained by contacting Q.H. Chen, National Taiwan University, Dept. of Chem, Taipei 10764, Taiwan. Additional authors for this research include Z. Wang, Y. Zheng, W. Shi, D.D. Wang, Y.C. Luo, B. Zhang, J.M. Lu, H.J. Zhang, J. Pan, C.Y. Mou, Z.K. Tang and P. Sheng (see also Fullerenes).

Keywords for this news article include: Taipei, Taiwan, Asia, Carbon Nanotubes, Emerging Technologies, Fullerenes, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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