Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 20, Issue 6, Pages 4347-4350Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp07745a
Keywords
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Funding
- Foundation of Science and Technology Department of Sichuan Province [2015JY0053]
- Longshan Scholars Programme of Southwest University of Science and Technology [17LZX449]
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We report a negative feedback loop based on proton-driven in situ formation of plasmonic MoO3-x nanosheets. When the concentration of Cu2+ is below a certain level, the reaction of Cu2+ and glutathione (GSH) produces Cu+ and few protons. However, when the concentration of Cu2+ is above a certain threshold, the reaction of GSH and Cu2+ will generate enough protons in the system to initiate the redox reaction of GSH and MoO3 nanosheets, which generates plasmonic MoO3-x nanosheets. This process in turn inhibits the reaction of GSH and Cu2+, which sequesters the excess Cu2+ from the system. The formation of MoO3-x nanosheets lowers the concentration of protons in solution and turns off the production of MoO3-x nanosheets. More importantly, the threshold concentration of Cu2+ can be easily regulated by changing the concentration of MoO3 nanosheets.
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