Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters
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2018
Authors
Ralević, UrošIsic, Goran
Vasić Anićijević, Dragana D.
Laban, Bojana B.
Bogdanović, Una
Lazović, Vladimir M.
Vodnik, Vesna
Gajic, Rados
Article (Published version)
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The adsorption of thiacyanine dye molecules on citrate-stabilized silver nanoparticle clusters drop-cast onto freshly cleaved mica or highly oriented pyrolytic graphite surfaces is examined using colocalized surface-enhanced Raman spectroscopy and atomic force microscopy. The incidence of dye Raman signatures in photoluminescence hotspots identified around nanoparticle clusters is considered for both citrate- and borate-capped silver nanoparticles and found to be substantially lower in the former case, suggesting that the citrate anions impede the efficient dye adsorption. Rigorous numerical simulations of light scattering on random nanoparticle clusters are used for estimating the electromagnetic enhancement and elucidating the hotspot formation mechanism. The majority of the enhanced Raman signal, estimated to be more than 90%, is found to originate from the nanogaps between adjacent nanoparticles in the cluster, regardless of the cluster size and geometry. (C) 2017 Elsevier B.V. All... rights reserved.
Keywords:
Surface enhanced Raman scattering / Atomic force microscopy / Citrate capped silver nanoparticles / Thiacyanine dyeSource:
Applied Surface Science, 2018, 434, 540-548Funding / projects:
- Studies of enzyme interactions with toxic and pharmacologically active molecules (RS-MESTD-Basic Research (BR or ON)-172023)
- Physics of Ordered Nanostructures and New Materials in Photonics (RS-MESTD-Basic Research (BR or ON)-171005)
- Fabrication and characterization of nano-photonic functional structrues in biomedicine and informatics (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45016)
DOI: 10.1016/j.apsusc.2017.10.148
ISSN: 0169-4332; 1873-5584
WoS: 000419116600062
Scopus: 2-s2.0-85032663816
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VinčaTY - JOUR AU - Ralević, Uroš AU - Isic, Goran AU - Vasić Anićijević, Dragana D. AU - Laban, Bojana B. AU - Bogdanović, Una AU - Lazović, Vladimir M. AU - Vodnik, Vesna AU - Gajic, Rados PY - 2018 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1890 AB - The adsorption of thiacyanine dye molecules on citrate-stabilized silver nanoparticle clusters drop-cast onto freshly cleaved mica or highly oriented pyrolytic graphite surfaces is examined using colocalized surface-enhanced Raman spectroscopy and atomic force microscopy. The incidence of dye Raman signatures in photoluminescence hotspots identified around nanoparticle clusters is considered for both citrate- and borate-capped silver nanoparticles and found to be substantially lower in the former case, suggesting that the citrate anions impede the efficient dye adsorption. Rigorous numerical simulations of light scattering on random nanoparticle clusters are used for estimating the electromagnetic enhancement and elucidating the hotspot formation mechanism. The majority of the enhanced Raman signal, estimated to be more than 90%, is found to originate from the nanogaps between adjacent nanoparticles in the cluster, regardless of the cluster size and geometry. (C) 2017 Elsevier B.V. All rights reserved. T2 - Applied Surface Science T1 - Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters VL - 434 SP - 540 EP - 548 DO - 10.1016/j.apsusc.2017.10.148 ER -
@article{ author = "Ralević, Uroš and Isic, Goran and Vasić Anićijević, Dragana D. and Laban, Bojana B. and Bogdanović, Una and Lazović, Vladimir M. and Vodnik, Vesna and Gajic, Rados", year = "2018", abstract = "The adsorption of thiacyanine dye molecules on citrate-stabilized silver nanoparticle clusters drop-cast onto freshly cleaved mica or highly oriented pyrolytic graphite surfaces is examined using colocalized surface-enhanced Raman spectroscopy and atomic force microscopy. The incidence of dye Raman signatures in photoluminescence hotspots identified around nanoparticle clusters is considered for both citrate- and borate-capped silver nanoparticles and found to be substantially lower in the former case, suggesting that the citrate anions impede the efficient dye adsorption. Rigorous numerical simulations of light scattering on random nanoparticle clusters are used for estimating the electromagnetic enhancement and elucidating the hotspot formation mechanism. The majority of the enhanced Raman signal, estimated to be more than 90%, is found to originate from the nanogaps between adjacent nanoparticles in the cluster, regardless of the cluster size and geometry. (C) 2017 Elsevier B.V. All rights reserved.", journal = "Applied Surface Science", title = "Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters", volume = "434", pages = "540-548", doi = "10.1016/j.apsusc.2017.10.148" }
Ralević, U., Isic, G., Vasić Anićijević, D. D., Laban, B. B., Bogdanović, U., Lazović, V. M., Vodnik, V.,& Gajic, R.. (2018). Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters. in Applied Surface Science, 434, 540-548. https://doi.org/10.1016/j.apsusc.2017.10.148
Ralević U, Isic G, Vasić Anićijević DD, Laban BB, Bogdanović U, Lazović VM, Vodnik V, Gajic R. Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters. in Applied Surface Science. 2018;434:540-548. doi:10.1016/j.apsusc.2017.10.148 .
Ralević, Uroš, Isic, Goran, Vasić Anićijević, Dragana D., Laban, Bojana B., Bogdanović, Una, Lazović, Vladimir M., Vodnik, Vesna, Gajic, Rados, "Nanospectroscopy of thiacyanine dye molecules adsorbed on silver nanoparticle clusters" in Applied Surface Science, 434 (2018):540-548, https://doi.org/10.1016/j.apsusc.2017.10.148 . .