TY - JOUR
T1 - Synthesis of cadmium sulfide nanoparticles by biomass of Fusarium oxysporum f. sp. lycopersici
AU - Sandoval-Cárdenas, Diana Issell
AU - Gómez-Ramírez, Marlenne
AU - Rojas-Avelizapa, Norma Gabriela
AU - Vidales-Hurtado, Mónica Araceli
N1 - Publisher Copyright:
© 2017 Trans Tech Publications.
PY - 2017
Y1 - 2017
N2 - This study describes extracellular biosynthesis of cadmium sulfide quantum dots by Fusarium oxysporum f. sp. lycopersici. Mycelia was incubated with a cadmium sulfate solution at 30°C and after 12 days the mixture became yellow, then the biomass was discarded through paper filtration. The filtrate containing extracellular cadmium sulfide quantum dots displayed increased UV-Vis absorption from 300-500 nm and fluorescence at 520 nm which was not shown when incubated without cadmium sulfide, thus indicating the presence of biologically synthesized quantum dots. Transmission electron microscope analysis of biologically synthesized quantum dots evinced individual 2-6 nm diameter spheroid nanoparticles of uniform size. Energy dispersive spectroscopy confirmed the presence of S and Cd. Additionally, this study showed the relevance in the use of positive and negative controls when evaluating the biosynthesis of CdS quantum dots using UV-Vis and fluorescence spectrophotometry.
AB - This study describes extracellular biosynthesis of cadmium sulfide quantum dots by Fusarium oxysporum f. sp. lycopersici. Mycelia was incubated with a cadmium sulfate solution at 30°C and after 12 days the mixture became yellow, then the biomass was discarded through paper filtration. The filtrate containing extracellular cadmium sulfide quantum dots displayed increased UV-Vis absorption from 300-500 nm and fluorescence at 520 nm which was not shown when incubated without cadmium sulfide, thus indicating the presence of biologically synthesized quantum dots. Transmission electron microscope analysis of biologically synthesized quantum dots evinced individual 2-6 nm diameter spheroid nanoparticles of uniform size. Energy dispersive spectroscopy confirmed the presence of S and Cd. Additionally, this study showed the relevance in the use of positive and negative controls when evaluating the biosynthesis of CdS quantum dots using UV-Vis and fluorescence spectrophotometry.
KW - Bioreduction
KW - Biosynthesis
KW - CdS
KW - Fusarium oxysporum f. sp. lycopersici
KW - Nanoparticles
KW - Quantum dots
UR - http://www.scopus.com/inward/record.url?scp=85014936827&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/JNanoR.46.179
DO - 10.4028/www.scientific.net/JNanoR.46.179
M3 - Artículo
SN - 1662-5250
VL - 46
SP - 179
EP - 191
JO - Journal of Nano Research
JF - Journal of Nano Research
ER -