Growth of large-scale MoS2 nanosheets on double layered ZnCo2O4 for real-time in situ H2S monitoring in live cells.
Type
ArticleAuthors
Mani, Veerappan
Selvaraj, Shanthi
Jeromiyas, Nithiya

Huang, Sheng-Tung
Ikeda, Hiroya
Hayakawa, Yasuhiro

Ponnusamy, Suru
Muthamizhchelvan, Chellamuthu
Salama, Khaled N.

KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
Sensors Lab
Date
2020Submitted Date
2020-05-05Permanent link to this record
http://hdl.handle.net/10754/664257
Metadata
Show full item recordAbstract
There is an urgent need to develop in situ sensors that monitor the continued release of H2S from biological systems to understand H2S-related pathology and pharmacology. For this purpose, we have developed a molybdenum disulfide supported double-layered zinc cobaltite modified carbon cloth electrode (MoS2-ZnCo2O4-ZnCo2O4) based electrocatalytic sensor. The results of our study suggest that the MoS2-ZnCo2O4-ZnCo2O4 electrode has excellent electrocatalytic ability to oxidize H2S at physiological pH, in a minimized overpotential (+0.20 vs. Ag/AgCl) with an amplified current signal. MoS2 grown on double-layered ZnCo2O4 showed relatively better surface properties and electrochemical properties than MoS2 grown on single-layered ZnCo2O4. The sensor delivered excellent analytical parameters, such as low detection limit (5 nM), wide linear range (10 nM-1000 μM), appreciable stability (94.3%) and high selectivity (2.5-fold). The practicality of the method was tested in several major biological fluids. The electrode monitors the dynamics of bacterial H2S in real-time for up to 5 h with good cell viability. Our research shows that MoS2-ZnCo2O4-ZnCo2O4/carbon cloth is a robust and sensitive electrode to understand how bacteria seek to adjust their defense strategies under exogenously induced stress conditions.Citation
Mani, V., Selvaraj, S., Jeromiyas, N., Huang, S.-T., Ikeda, H., Hayakawa, Y., … Salama, K. N. (2020). Growth of large-scale MoS2 nanosheets on double layered ZnCo2O4 for real-time in situ H2S monitoring in live cells. Journal of Materials Chemistry B. doi:10.1039/d0tb01162bSponsors
This work was supported by the Ministry of Science and Technology (107-2113-M-027-007- and 108-2221-E-027-063-),Taiwan and King Abdullah University of Science and Technology (KAUST), Saudi Arabia. We also thank the support from Japanese Government MONBUKAGAKUSHO: MEXT Scholarship.Publisher
Royal Society of Chemistry (RSC)PubMed ID
32667020Additional Links
http://xlink.rsc.org/?DOI=D0TB01162Bae974a485f413a2113503eed53cd6c53
10.1039/d0tb01162b
Scopus Count
Except where otherwise noted, this item's license is described as This is an open access article licensed under a Creative Commons Attribution 3.0 Unported Licence.
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