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Time-dependent growth of crystalline Au0-nanoparticles in cyanobacteria as self-reproducing bioreactors : 2. Anabaena cylindrica

Title data

Rösken, Liz M. ; Cappel, Felix ; Körsten, Susanne ; Fischer, Christian B. ; Schönleber, Andreas ; van Smaalen, Sander ; Geimer, Stefan ; Beresko, Christian ; Ankerhold, Georg ; Wehner, Stefan:
Time-dependent growth of crystalline Au0-nanoparticles in cyanobacteria as self-reproducing bioreactors : 2. Anabaena cylindrica.
In: Beilstein Journal of Nanotechnology. Vol. 7 (March 2016) . - pp. 312-327.
ISSN 2190-4286
DOI: https://doi.org/10.3762/bjnano.7.30

Abstract in another language

Microbial biosynthesis of metal nanoparticles as needed in catalysis has shown its theoretical ability as an extremely environmentally friendly production method in the last few years, even though the separation of the nanoparticles is challenging. Biosynthesis, summing up biosorption and bioreduction of diluted metal ions to zero valent metals, is especially ecofriendly, when the bioreactor itself is harmless and needs no further harmful reagents. The cyanobacterium Anabaena cylindrica (SAG 1403.2) is able to form crystalline Au(0)-nanoparticles from Au(3+) ions and does not release toxic anatoxin-a. X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and laser-induced breakdown spectroscopy (LIBS) are applied to monitor the time-dependent development of gold nanoparticles for up to 40 hours. Some vegetative cells (VC) are filled with nanoparticles within minutes, while the extracellular polymeric substances (EPS) of vegetative cells and the heterocyst polysaccharide layer (HEP) are the regions, where the first nanoparticles are detected on most other cells. The uptake of gold starts immediately after incubation and within four hours the average size remains constant around 10 nm. Analyzing the TEM images with an image processing program reveals a wide distribution for the diameter of the nanoparticles at all times and in all regions of the cyanobacteria. Finally, the nanoparticle concentration in vegetative cells of Anabaena cylindrica is about 50% higher than in heterocysts (HC). These nanoparticles are found to be located along the thylakoid membranes.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: X-ray powder diffraction (XRD); biosynthesis; gold nanoparticles; laser-induced breakdown spectroscopy (LIBS); transmission electron microscopy (TEM)
Institutions of the University: Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography > Chair Crystallography - Univ.-Prof. Dr. Sander van Smaalen
Profile Fields > Advanced Fields > Advanced Materials
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
Date Deposited: 01 Dec 2016 08:49
Last Modified: 24 Feb 2017 09:29
URI: https://eref.uni-bayreuth.de/id/eprint/35386