Synthesis and characterization of DNA fenced, self-assembled SnO2 nano-assemblies for supercapacitor applications

Dalton Transactions : an International Journal of Inorganic Chemistry
U NithiyananthamSubrata Kundu

Abstract

Self-assembled, aggregated, chain-like SnO2 nano-assemblies were synthesized at room temperature by a simple wet chemical route within an hour in the presence of DNA as a scaffold. The average size of the SnO2 particles and the chain diameter were controlled by tuning the DNA to Sn(ii) molar ratio and altering the other reaction parameters. A formation and growth mechanism of the SnO2 NPs on DNA is discussed. The SnO2 chain-like assemblies were utilized as potential anode materials in an electrochemical supercapacitor. From the supercapacitor study, it was found that the SnO2 nanomaterials showed different specific capacitance (Cs) values depending on varying chain-like morphologies and the order of Cs values was: chain-like (small size) > chain-like (large size). The highest Cs of 209 F g(-1) at a scan rate of 5 mV s(-1) was observed for SnO2 nano-assemblies having chain-like structure with a smaller size. The long term cycling stability study of a chain-like SnO2 electrode was found to be stable and retained ca. 71% of the initial specific capacitance, even after 5000 cycles. A supercapacitor study revealed that both morphologies can be used as a potential anode material and the best efficiency was observed for small sized ch...Continue Reading

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Citations

Apr 4, 2018·Chemical Society Reviews·Zhaowei ChenXiaogang Qu
Jan 14, 2021·Biomedical Physics & Engineering Express·B K Murgunde, M K Rabinal
Apr 3, 2021·Nanotechnology·Rehab ElkayalAyman S Elmezayyen

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