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Ag-nanoparticles-decorated NiO-nanoflakes grafted Ni-nanorod arrays stuck out of porous AAO as effective SERS substrates.
Phys Chem Chem Phys. 2014 Feb 28; 16(8):3686-92.PC

Abstract

NiO-nanoflakes (NiO-NFs) grafted Ni-nanorod (Ni-NR) arrays stuck out of the porous anodic aluminum oxide (AAO) template are achieved by a combinatorial process of AAO-confined electrodeposition of Ni-NRs, selectively etching part of the AAO template to expose the Ni-NRs, wet-etching the exposed Ni-NRs in ammonia to obtain Ni(OH)2-NFs grafted onto the cone-shaped Ni-NRs, and annealing to transform Ni(OH)2-NFs in situ into NiO-NFs. By top-view sputtering, Ag-nanoparticles (Ag-NPs) are decorated on each NiO-NFs grafted Ni-NR (denoted as NiO-NFs@Ni-NR). The resultant Ag-NPs-decorated NiO-NFs@Ni-NR (denoted as Ag-NPs@NiO-NFs@Ni-NR) arrays exhibit not only strong surface-enhanced Raman scattering (SERS) activity but also reproducible SERS-signals over the whole array. It is demonstrated that the strong SERS-activity is mainly ascribed to the high density of sub-10 nm gaps (hot spots) between the neighboring Ag-NPs, the semiconducting NiO-NFs induced chemical enhancement effect, and the lightning rod effect of the cone-shaped Ni-NRs. The three-level hierarchical nanostructure arrays stuck out of the AAO template can be utilized to probe polychlorinated biphenyls (PCBs, a kind of global environmental hazard) with a concentration as low as 5 × 10(-6) M, showing promising potential in SERS-based rapid detection of organic environmental pollutants.

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 230031, China. gwmeng@issp.ac.cn.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

24419246

Citation

Zhou, Qitao, et al. "Ag-nanoparticles-decorated NiO-nanoflakes Grafted Ni-nanorod Arrays Stuck Out of Porous AAO as Effective SERS Substrates." Physical Chemistry Chemical Physics : PCCP, vol. 16, no. 8, 2014, pp. 3686-92.
Zhou Q, Meng G, Huang Q, et al. Ag-nanoparticles-decorated NiO-nanoflakes grafted Ni-nanorod arrays stuck out of porous AAO as effective SERS substrates. Phys Chem Chem Phys. 2014;16(8):3686-92.
Zhou, Q., Meng, G., Huang, Q., Zhu, C., Tang, H., Qian, Y., Chen, B., & Chen, B. (2014). Ag-nanoparticles-decorated NiO-nanoflakes grafted Ni-nanorod arrays stuck out of porous AAO as effective SERS substrates. Physical Chemistry Chemical Physics : PCCP, 16(8), 3686-92. https://doi.org/10.1039/c3cp54119c
Zhou Q, et al. Ag-nanoparticles-decorated NiO-nanoflakes Grafted Ni-nanorod Arrays Stuck Out of Porous AAO as Effective SERS Substrates. Phys Chem Chem Phys. 2014 Feb 28;16(8):3686-92. PubMed PMID: 24419246.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ag-nanoparticles-decorated NiO-nanoflakes grafted Ni-nanorod arrays stuck out of porous AAO as effective SERS substrates. AU - Zhou,Qitao, AU - Meng,Guowen, AU - Huang,Qing, AU - Zhu,Chuhong, AU - Tang,Haibin, AU - Qian,Yiwu, AU - Chen,Bin, AU - Chen,Bensong, PY - 2014/1/15/entrez PY - 2014/1/15/pubmed PY - 2014/9/26/medline SP - 3686 EP - 92 JF - Physical chemistry chemical physics : PCCP JO - Phys Chem Chem Phys VL - 16 IS - 8 N2 - NiO-nanoflakes (NiO-NFs) grafted Ni-nanorod (Ni-NR) arrays stuck out of the porous anodic aluminum oxide (AAO) template are achieved by a combinatorial process of AAO-confined electrodeposition of Ni-NRs, selectively etching part of the AAO template to expose the Ni-NRs, wet-etching the exposed Ni-NRs in ammonia to obtain Ni(OH)2-NFs grafted onto the cone-shaped Ni-NRs, and annealing to transform Ni(OH)2-NFs in situ into NiO-NFs. By top-view sputtering, Ag-nanoparticles (Ag-NPs) are decorated on each NiO-NFs grafted Ni-NR (denoted as NiO-NFs@Ni-NR). The resultant Ag-NPs-decorated NiO-NFs@Ni-NR (denoted as Ag-NPs@NiO-NFs@Ni-NR) arrays exhibit not only strong surface-enhanced Raman scattering (SERS) activity but also reproducible SERS-signals over the whole array. It is demonstrated that the strong SERS-activity is mainly ascribed to the high density of sub-10 nm gaps (hot spots) between the neighboring Ag-NPs, the semiconducting NiO-NFs induced chemical enhancement effect, and the lightning rod effect of the cone-shaped Ni-NRs. The three-level hierarchical nanostructure arrays stuck out of the AAO template can be utilized to probe polychlorinated biphenyls (PCBs, a kind of global environmental hazard) with a concentration as low as 5 × 10(-6) M, showing promising potential in SERS-based rapid detection of organic environmental pollutants. SN - 1463-9084 UR - https://www.unboundmedicine.com/medline/citation/24419246/Ag_nanoparticles_decorated_NiO_nanoflakes_grafted_Ni_nanorod_arrays_stuck_out_of_porous_AAO_as_effective_SERS_substrates_ L2 - https://doi.org/10.1039/c3cp54119c DB - PRIME DP - Unbound Medicine ER -