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- W1992215537 abstract "Gold nanoparticles (NGs) were modified by the aptamer (ssDNA) to prepare a NGssDNA probe for As3+. In pH 8.0 HEPES buffer solution containing 50 mmol L−1 NaCl, rhodamine 6G (Rh6G) molecules adsorbed on the NGssDNA sol substrate exhibited a strong surface-enhanced Raman scattering peak (SERS) at 1358 cm−1. Upon addition of As3+, it reacts with the NGssDNA probe to form a stable As–ssDNA complex and release NGs that were aggregated to the NG aggregates (NGAs) as a substrate, in which Rh6G SERS activity is very weak. With the increase of As3+ concentration, the SERS peak decreased at 1358 cm−1 due to more NGAs forming. The decreased SERS intensity responds linearly with the concentration of As3+ over 0.288–23.04 ng mL−1, with a detection limit of 0.1 ng mL−1." @default.
- W1992215537 created "2016-06-24" @default.
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- W1992215537 date "2014-07-23" @default.
- W1992215537 modified "2023-10-12" @default.
- W1992215537 title "A simple label-free rhodamine 6G SERS probe for quantitative analysis of trace As<sup>3+</sup>in an aptamer–nanosol" @default.
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- W1992215537 doi "https://doi.org/10.1039/c4ra04416a" @default.
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