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Ordered arrays of Au-nanobowls loaded with Ag-nanoparticles as effective SERS substrates for rapid detection of PCBs.
Nanotechnology. 2014 Apr 11; 25(14):145605.N

Abstract

Large-scale hexagonally close-packed arrays of Au-nanobowls (Au-NBs) with tens of Ag-nanoparticles (Ag-NPs) dispersed in each bowl (denoted as Ag-NPs@Au-NB arrays) are achieved and utilized as effective surface-enhanced Raman scattering (SERS) substrates. The field enhancement benefiting from the special particle-in-cavity geometrical structure as well as the high density of SERS hot spots located in the sub-10 nm gaps between adjacent Ag-NPs and at the particle-cavity junctions all together contribute to the high SERS activity of the Ag-NPs@Au-NB arrays; meanwhile the ordered morphological features of the Ag-NPs@Au-NB arrays guarantee uniformity and reproducibility of the SERS signals. By modifying the Ag-NPs@Au-NB arrays with mono-6-thio-β-cyclodextrin, the SERS detection sensitivity to 3,3('),4,4(')-tetrachlorobiphenyl (PCB-77, one congener of polychlorinated biphenyls (PCBs, kinds of persistent organic pollutants which represent a global environmental hazard)) can be further improved and a low concentration down to 5 × 10(-7) M can still be examined, showing promising potential for application in rapid detection of trace-level PCBs in the environment.

Authors+Show Affiliations

Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24633265

Citation

Chen, Bensong, et al. "Ordered Arrays of Au-nanobowls Loaded With Ag-nanoparticles as Effective SERS Substrates for Rapid Detection of PCBs." Nanotechnology, vol. 25, no. 14, 2014, p. 145605.
Chen B, Meng G, Zhou F, et al. Ordered arrays of Au-nanobowls loaded with Ag-nanoparticles as effective SERS substrates for rapid detection of PCBs. Nanotechnology. 2014;25(14):145605.
Chen, B., Meng, G., Zhou, F., Huang, Q., Zhu, C., Hu, X., & Kong, M. (2014). Ordered arrays of Au-nanobowls loaded with Ag-nanoparticles as effective SERS substrates for rapid detection of PCBs. Nanotechnology, 25(14), 145605. https://doi.org/10.1088/0957-4484/25/14/145605
Chen B, et al. Ordered Arrays of Au-nanobowls Loaded With Ag-nanoparticles as Effective SERS Substrates for Rapid Detection of PCBs. Nanotechnology. 2014 Apr 11;25(14):145605. PubMed PMID: 24633265.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ordered arrays of Au-nanobowls loaded with Ag-nanoparticles as effective SERS substrates for rapid detection of PCBs. AU - Chen,Bensong, AU - Meng,Guowen, AU - Zhou,Fei, AU - Huang,Qing, AU - Zhu,Chuhong, AU - Hu,Xiaoye, AU - Kong,Mingguang, Y1 - 2014/03/14/ PY - 2014/3/18/entrez PY - 2014/3/19/pubmed PY - 2014/11/5/medline SP - 145605 EP - 145605 JF - Nanotechnology JO - Nanotechnology VL - 25 IS - 14 N2 - Large-scale hexagonally close-packed arrays of Au-nanobowls (Au-NBs) with tens of Ag-nanoparticles (Ag-NPs) dispersed in each bowl (denoted as Ag-NPs@Au-NB arrays) are achieved and utilized as effective surface-enhanced Raman scattering (SERS) substrates. The field enhancement benefiting from the special particle-in-cavity geometrical structure as well as the high density of SERS hot spots located in the sub-10 nm gaps between adjacent Ag-NPs and at the particle-cavity junctions all together contribute to the high SERS activity of the Ag-NPs@Au-NB arrays; meanwhile the ordered morphological features of the Ag-NPs@Au-NB arrays guarantee uniformity and reproducibility of the SERS signals. By modifying the Ag-NPs@Au-NB arrays with mono-6-thio-β-cyclodextrin, the SERS detection sensitivity to 3,3('),4,4(')-tetrachlorobiphenyl (PCB-77, one congener of polychlorinated biphenyls (PCBs, kinds of persistent organic pollutants which represent a global environmental hazard)) can be further improved and a low concentration down to 5 × 10(-7) M can still be examined, showing promising potential for application in rapid detection of trace-level PCBs in the environment. SN - 1361-6528 UR - https://www.unboundmedicine.com/medline/citation/24633265/Ordered_arrays_of_Au_nanobowls_loaded_with_Ag_nanoparticles_as_effective_SERS_substrates_for_rapid_detection_of_PCBs_ L2 - https://doi.org/10.1088/0957-4484/25/14/145605 DB - PRIME DP - Unbound Medicine ER -