Biosynthesis of fluorescent CdS nanocrystals with semiconductor properties: Comparison of microbial and plant production systems

Journal of Biotechnology
Zahwa Al-Shalabi, Pauline M Doran

Abstract

This study investigated fission yeast (Schizosaccharomyces pombe) and hairy roots of tomato (Solanum lycopersicum) as in vitro production vehicles for biological synthesis of CdS quantum dots. Cd added during the mid-growth phase of the cultures was detoxified within the biomass into inorganic sulphide-containing complexes with the quantum confinement properties of semiconductor nanocrystals. Significant differences were found between the two host systems in terms of nanoparticle production kinetics, yield and quality. The much slower growth rate of hairy roots compared with yeast is a disadvantage for commercial scaled-up production. Nanoparticle extraction from the biomass was less effective for the roots: 19% of the Cd present in the hairy roots was recovered after extraction compared with 34% for the yeast. The overall yield of CdS quantum dots was also lower for the roots: relative to the amount of Cd taken up into the biomass, 8.5% was recovered in yeast gel filtration fractions exhibiting quantum dot properties whereas the result for hairy roots was only 0.99%. Yeast-produced CdS crystallites were somewhat smaller with diameters of approximately 2-6 nm compared with those of 4-10nm obtained from the roots. The average ra...Continue Reading

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Citations

Aug 29, 2019·Frontiers in Microbiology·Carla Gallardo-BenaventeAndrés Quiroz
Oct 4, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Mohamed Abdel-SalamKwang-Hyun Baek
Sep 23, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Reddhy MahleRintu Banerjee

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