publication . Other literature type . Article . 2011

Biosynthesis of gold nanoparticles using diatoms—silica-gold and EPS-gold bionanocomposite formation

Schröfel, Adam; Kratošová, Gabriela; Bohunická, Markéta; Dobročka, Edmund; Vávra, Ivo;
  • Published: 21 Jan 2011
  • Publisher: Springer Science and Business Media LLC
  • Country: Czech Republic
Abstract
Novel synthesis of gold nanoparticles, EPS-gold, and silica-gold bionanocomposites by biologically driven processes employing two diatom strains (Navicula atomus, Diadesmis gallica) is described. Transmission electron microscopy (TEM) and electron diffraction analysis (SAED) revealed a presence of gold nanoparticles in the experimental solutions of the diatom culture mixed with tetrachloroaureate. Nature of the gold nanoparticles was confirmed by X-ray diffraction studies. Scanning electron microscopy (SEM) and TEM showed that the nanoparticles were associated with the diatom frustules and extracellular polysaccharides (EPS) excreted by the diatom cells. Due to ...
Subjects
Medical Subject Headings: fungi
free text keywords: Modelling and Simulation, General Materials Science, Atomic and Molecular Physics, and Optics, Bioengineering, General Chemistry, Condensed Matter Physics, Nanoparticle, Nanotechnology, Colloidal gold, Scanning electron microscope, Materials science, Frustule, biology.organism_classification, biology, Inorganic chemistry, Electron diffraction, Transmission electron microscopy, Chemical engineering, Selected area diffraction, Diatom, composite – diadesmis gallica, diatoms, EPS, gold, nanoparticles, navicula atomus, silica
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publication . Other literature type . Article . 2011

Biosynthesis of gold nanoparticles using diatoms—silica-gold and EPS-gold bionanocomposite formation

Schröfel, Adam; Kratošová, Gabriela; Bohunická, Markéta; Dobročka, Edmund; Vávra, Ivo;