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Multiwall Carbon Nanotubes and Nanofibers in Gallionella
Stockholm University, Faculty of Science, Department of Geological Sciences.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2014 (English)In: Geomicrobiology Journal, ISSN 0149-0451, E-ISSN 1521-0529, Vol. 31, no 9, 764-768 p.Article in journal (Refereed) Published
Abstract [en]

This is a report of microbial formation of multiwall carbon nanotubes (MWCNT) and nanofibers at normal pressure and temperature. Our results demonstrate a single cell organism's ability to form complicated material of high industrial interest. The microorganism, Gallionella, is classified as autotrophic and dysoxic. It uses CO2 for its carbon source and grows in environments with low concentrations of free oxygen. The organisms were taken from a deep bedrock tunnel where water leaking from cracks in the rock formed a precipitate of iron as a bacterial slime on the rock wall. Detailed investigations of the samples by transmission electron microscopy (TEM) revealed several types of MWCNT. The stalk single MWCNT was observed with a diameter of about 10nm and with an inner diameter of 1.35nm. The wall of the nanotube is built by graphite layers. The 10 to 20 sheets are used to form the tubes. The measured spacing between the lines is 0.34nm, which is an average value of interlayer spacing, close to the graphitic distance (0.335nm). HRTEM images reveal a two-dimensional lattice with a spacing of 0.24nm, indicating the presence of graphene.

Place, publisher, year, edition, pages
2014. Vol. 31, no 9, 764-768 p.
Keyword [en]
carbon nanotubes, Gallionella, graphene, graphite
National Category
Earth and Related Environmental Sciences Chemical Sciences
URN: urn:nbn:se:su:diva-108552DOI: 10.1080/01490451.2013.875297ISI: 000342212100002OAI: diva2:760861


Available from: 2014-11-04 Created: 2014-10-29 Last updated: 2014-11-04Bibliographically approved

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Hallberg, RolfTai, Cheuk-Wai
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Department of Geological SciencesDepartment of Materials and Environmental Chemistry (MMK)
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Earth and Related Environmental SciencesChemical Sciences

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