Biogenic formation of photoactive arsenic-sulfide nanotubes by Shewanella sp. strain HN-41
Microorganisms facilitate the formation of a wide range of minerals that have unique physical and chemical properties as well as morphologies that are not produced by abiotic processes. Here, we report the production of an extensive extracellular network of filamentous, arsenic-sulfide (As-S) nanotubes (20–100 nm in diameter by 30 µm in length) by the dissimilatory metal-reducing bacterium Shewanella sp. HN-41. The As-S nanotubes, formed via the reduction of As(V) and S2O, were initially amorphous As2S3 but evolved with increasing incubation time toward polycrystalline phases of the chalcogenide minerals realgar (AsS) and duranusite (As4S). Upon maturation, the As-S nanotubes behaved as metals and semiconductors in terms of their electrical and photoconductive properties, respectively. The As-S nanotubes produced by Shewanella may provide useful materials for novel nano- and opto-electronic devices.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 923683
- Report Number(s):
- PNNL-SA-58352; PNASA6; 26711; KP1501021; TRN: US200804%%1340
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, 104(51):20410-20415, Vol. 104, Issue 51; ISSN 0027-8424
- Country of Publication:
- United States
- Language:
- English
Similar Records
Biogenic formation of As-S nanotubes by diverse Shewanella strains
Arsenic mobilization by the dissimilatory Fe(III)-reducing bacterium Shewanella alga BrY