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- W2617853417 abstract "Herein, we demonstrated a simple and efficient method to detect Cu2 + based on amplified optical activity in the chiral nanoassemblies of gold nanorods (Au NRs). L-Cysteine can induce side-by-side or end-to-end assembly of Au NRs with an evident plasmonic circular dichroism (PCD) response due to coupling between surface plasmon resonances (SPR) of Au NRs and the chiral signal of L-Cys. Because of the obvious stronger plasmonic circular dichrosim (CD) response of the side-by-side assembly compared with the end-to-end assemblies, SS assembled Au NRs was selected as a sensitive platform and used for Cu2 + detection. In the presence of Cu2 +, Cu2 + can catalyze O2 oxidation of cysteine to cystine. With an increase in Cu2 + concentration, the L-Cysteine-mediated assembly of Au NRs decreased because of decrease in the free cysteine thiol groups, and the PCD signal decreased. Taking advantage of this method, Cu2 + could be detected in the concentration range of 20 pM–5 nM. Under optimal conditions, the calculated detection limit was found to be 7 pM." @default.
- W2617853417 created "2017-06-05" @default.
- W2617853417 creator A5016500345 @default.
- W2617853417 creator A5091813279 @default.
- W2617853417 date "2017-11-01" @default.
- W2617853417 modified "2023-10-17" @default.
- W2617853417 title "Highly selective and sensitive method for Cu 2+ detection based on chiroptical activity of L-Cysteine mediated Au nanorod assemblies" @default.
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- W2617853417 doi "https://doi.org/10.1016/j.saa.2017.05.064" @default.
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