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Multiwall Carbon Nanotubes and Nanofibers in Gallionella
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för geologiska vetenskaper.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
2014 (engelsk)Inngår i: Geomicrobiology Journal, ISSN 0149-0451, E-ISSN 1521-0529, Vol. 31, nr 9, s. 764-768Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2014. Vol. 31, nr 9, s. 764-768
Emneord [en]
carbon nanotubes, Gallionella, graphene, graphite
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-108552DOI: 10.1080/01490451.2013.875297ISI: 000342212100002OAI: oai:DiVA.org:su-108552DiVA, id: diva2:760861
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AuthorCount:2;

Tilgjengelig fra: 2014-11-04 Laget: 2014-10-29 Sist oppdatert: 2022-02-24bibliografisk kontrollert

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Hallberg, RolfTai, Cheuk-Wai

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