Gap controlled self-assembly Au@Ag@Au NPs for SERS assay of thiram
Zhang, Jiale; Wu, Caijun; Yuan, Ruo; Huang, Jian-An; Yang, Xia (2022-05-05)
Zhang, J., Wu, C., Yuan, R., Huang, J.-A., & Yang, X. (2022). Gap controlled self-assembly Au@Ag@Au NPs for SERS assay of thiram. Food Chemistry, 390, 133164. https://doi.org/10.1016/j.foodchem.2022.133164
© 2022. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe202301173358
Tiivistelmä
Abstract
Thiram (TRM), one dithiocarbamate fungicide, is hazardous due to its ever-growing threat to our production and living. In order to detecting TRM more sensitively, a subtle surface-enhanced Raman scattering (SERS) substrate was reported to achieve TRM detection based on oil-water biphasic self-assembly interface of multi-interstitial Au@Ag@Au NPs crosslinking with 4,4′ -Diamino-p-Terphenyl (DATP). This Au@Ag@Au@DATP array shows a noteworthy enhanced Raman signal and stability by controlling the inter-particle spacing of Au@Ag@Au NPs, which overcomes problems of traditional randomly self-assembly methods without cross linker. The Au@Ag@Au@DATP array attained the limit of detection (LOD) of 7.56 × 10−3 ppb for TRM. In addition, this work gives a new approach for controlling gap of SERS hot spot, which have distinct potential in rapid assessment and identification of pesticides on foods.
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