Diatoms-A "green" way to biosynthesize gold-silica nanocomposites?
Pytlik N, Butscher D, Machill S, Brunner E (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 232
Pages Range: 1353-1368
Journal Issue: 9-11
Abstract
Biosynthesis by diatoms provides a green approach for nanoparticle (NP) production. However, reproducible and homogeneous shapes are essential for their application. To improve these characteristics during biosynthesis, the underlying synthesis mechanisms as well as involved substances need to be understood. The first essential step for suitable analyses is the purification of Au-silica-nanocomposites from organic biomass. Succesfully cleaned nanocomposites could, for example, be useful as catalysts. In combination with the biosynthesized NPs, this material presents a "green" catalyst and could contribute to the currently thriving green nanochemistry. In this work, we compare different purification agents with respect to their ability to purify cells of the diatom Stephanopyxis turris without separating the biosynthesized Au-silica-nanocomposites from the diatom cell walls. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) are used to localize and identify Au-silica-nanocomposites around the cells. The amount of remaining organic compounds on the purified cell is detected by attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy. Furthermore, inductively coupled plasma optical emission spectrometry (ICP-OES) is used to track the "gold path" during cell growth and the different purifications steps.
Involved external institutions
Germany (DE)How to cite
APA:
Pytlik, N., Butscher, D., Machill, S., & Brunner, E. (2018). Diatoms-A "green" way to biosynthesize gold-silica nanocomposites? Zeitschrift für Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 232(9-11), 1353-1368. https://doi.org/10.1515/zpch-2018-1141
MLA:
Pytlik, Nathalie, et al. "Diatoms-A "green" way to biosynthesize gold-silica nanocomposites?" Zeitschrift für Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics 232.9-11 (2018): 1353-1368.
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