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Ag-nanoparticle-decorated Ge nanocap arrays protruding from porous anodic aluminum oxide as sensitive and reproducible surface-enhanced Raman scattering substrates.
Langmuir. 2014 Nov 25; 30(46):13964-9.L

Abstract

We report on the fabrication of Ag nanoparticle (Ag NP) decorated germanium (Ge) nanocap (Ag-NPs@Ge-nanocap) arrays protruding from highly ordered porous anodic aluminum oxide (AAO) template as highly sensitive and uniform surface-enhanced Raman scattering (SERS) substrates. The hybrid SERS substrates are fabricated via a combinatorial process of AAO template-assisted growth of Ge nanotubes with each tube having a hemispherical nanocap on the AAO pore bottom, wet chemical etching of the remaining aluminum and the AAO barrier layer to expose the Ge nanocaps, and sputtering Ag NPs on the Ge nanocap arrays. Because sufficient SERS "hot spots" are created from the electromagnetic coupling among the Ag NPs on the Ge nanocap and the highly ordered Ge nanocap arrays also have semiconducting chemical supporting enhancement, the hybrid SERS substrates have high SERS sensitivity and good signal reproducibility. Using the hybrid SERS substrates, Rhodamine 6G with a concentration down to 10(-11) M is identified, and one congener of highly toxic polychlorinated biphenyls with a concentration as low as 10(-6) M is also recognized, showing great potential for SERS-based rapid detection of organic pollutants in the environment.

Authors+Show Affiliations

Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei, 230031, China.No 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

25361441

Citation

Liu, Jing, et al. "Ag-nanoparticle-decorated Ge Nanocap Arrays Protruding From Porous Anodic Aluminum Oxide as Sensitive and Reproducible Surface-enhanced Raman Scattering Substrates." Langmuir : the ACS Journal of Surfaces and Colloids, vol. 30, no. 46, 2014, pp. 13964-9.
Liu J, Meng G, Li X, et al. Ag-nanoparticle-decorated Ge nanocap arrays protruding from porous anodic aluminum oxide as sensitive and reproducible surface-enhanced Raman scattering substrates. Langmuir. 2014;30(46):13964-9.
Liu, J., Meng, G., Li, X., & Huang, Z. (2014). Ag-nanoparticle-decorated Ge nanocap arrays protruding from porous anodic aluminum oxide as sensitive and reproducible surface-enhanced Raman scattering substrates. Langmuir : the ACS Journal of Surfaces and Colloids, 30(46), 13964-9. https://doi.org/10.1021/la5033338
Liu J, et al. Ag-nanoparticle-decorated Ge Nanocap Arrays Protruding From Porous Anodic Aluminum Oxide as Sensitive and Reproducible Surface-enhanced Raman Scattering Substrates. Langmuir. 2014 Nov 25;30(46):13964-9. PubMed PMID: 25361441.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ag-nanoparticle-decorated Ge nanocap arrays protruding from porous anodic aluminum oxide as sensitive and reproducible surface-enhanced Raman scattering substrates. AU - Liu,Jing, AU - Meng,Guowen, AU - Li,Xiangdong, AU - Huang,Zhulin, Y1 - 2014/11/13/ PY - 2014/11/1/entrez PY - 2014/11/2/pubmed PY - 2015/10/6/medline SP - 13964 EP - 9 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 30 IS - 46 N2 - We report on the fabrication of Ag nanoparticle (Ag NP) decorated germanium (Ge) nanocap (Ag-NPs@Ge-nanocap) arrays protruding from highly ordered porous anodic aluminum oxide (AAO) template as highly sensitive and uniform surface-enhanced Raman scattering (SERS) substrates. The hybrid SERS substrates are fabricated via a combinatorial process of AAO template-assisted growth of Ge nanotubes with each tube having a hemispherical nanocap on the AAO pore bottom, wet chemical etching of the remaining aluminum and the AAO barrier layer to expose the Ge nanocaps, and sputtering Ag NPs on the Ge nanocap arrays. Because sufficient SERS "hot spots" are created from the electromagnetic coupling among the Ag NPs on the Ge nanocap and the highly ordered Ge nanocap arrays also have semiconducting chemical supporting enhancement, the hybrid SERS substrates have high SERS sensitivity and good signal reproducibility. Using the hybrid SERS substrates, Rhodamine 6G with a concentration down to 10(-11) M is identified, and one congener of highly toxic polychlorinated biphenyls with a concentration as low as 10(-6) M is also recognized, showing great potential for SERS-based rapid detection of organic pollutants in the environment. SN - 1520-5827 UR - https://www.unboundmedicine.com/medline/citation/25361441/Ag_nanoparticle_decorated_Ge_nanocap_arrays_protruding_from_porous_anodic_aluminum_oxide_as_sensitive_and_reproducible_surface_enhanced_Raman_scattering_substrates_ L2 - https://doi.org/10.1021/la5033338 DB - PRIME DP - Unbound Medicine ER -
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