Ultrathin Single–Layered Membranes from Double–Walled Carbon Nanotubes


  • The authors are grateful to the Electron Microscope Lab of Tsinghua University for their assistance with the SEM and TEM experiments and to the National Center for Nanoscience and Technology (China) and the State key program for fundamental research of MOST (Grant No. G20000264—04, China) for financial supports. Work done at Louisiana State University was supported by the Louisiana Board of Regents (LEQSF(2005—08)–RD–B–05) and the National Science Foundation (DMI–0457555). Supporting information is available online from Wiley InterScience or from the author.


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Highly pure membranes of double–walled carbon nanotubes (DWCNTs; see figure) have been prepared by combining a purification process with the competition characteristics of water and ethanol interactions with the surface of CNTs. The resulting ultrathin films consist of a single layer of CNTs and they show an enhanced tensile strength. The method can also easily be expanded to other types of nanotubes.