Fabrication of silver nanodome embedded zinc oxide nanorods for enhanced Raman spectroscopy

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dc.contributor.author Vemuri, Suresh kumar
dc.contributor.author Khanna, Sakshum
dc.contributor.author Utsav
dc.contributor.author Peneliya, Sagar
dc.contributor.author Takhar, Vishakha
dc.contributor.author Benerjee, Rupak
dc.contributor.author Mukhopadhyay, Indrajit
dc.coverage.spatial United States of America
dc.date.accessioned 2022-02-03T08:03:07Z
dc.date.available 2022-02-03T08:03:07Z
dc.date.issued 2022-04
dc.identifier.citation Vemuri, Suresh kumar; Khanna, Sakshum; Utsav; Peneliya, Sagar; Takhar, Vishakha; Benerjee, Rupak and Mukhopadhyay, Indrajit, "Fabrication of silver nanodome embedded zinc oxide nanorods for enhanced Raman spectroscopy", Colloids and Surfaces A: Physicochemical and Engineering Aspects, DOI: 10.1016/j.colsurfa.2022.128336, vol. 639, Apr. 2022 en_US
dc.identifier.issn 0927-7757
dc.identifier.uri https://doi.org/10.1016/j.colsurfa.2022.128336
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/7453
dc.description.abstract Herein, we demonstrate a facile and versatile method to decorate various sizes of silver nanodomes (ZnONR@AgND) along the length of zinc oxide nanorods (AgND) grown over fluorine-doped tin oxide (FTO) substrate. The silver nanodomes (AgND) embedded along the edges of hexagonal zinc oxide nanorods/FTO (ZnONR) substrate were fabricated by using a combination of size selective ZnONR growth and thermal reconstruction. The prepared heterostructure's structural, morphological, and optical behaviors were analyzed by Transmission electron microscopy (TEM), X-Ray diffraction, Raman spectroscopy, field emission scanning electron microscopy (FE-SEM), and UV-Vis spectroscopy. The results confirm the formation of ZnONR@AgND heterostructure with close-packing and construction of the crystalline AgND, adhering to the different faces of the 1D semiconducting ZnONR rods. The AgND size and separation was controlled by the initial sputter thickness and the thermal budget employed during annealing. Insight into the enhanced mechanism for surface-enhanced raman scattering (SERS) activity of ZnONR@AgND was ascertained by probing the hot-spot localization and the enhancement in the electric field by COMSOL simulations and experimentally verified by using rhodamine 6 G (R6G) probe molecules at various concentration 10-3-10-12 M. The prepared ZnONR@AgND demonstrated a superior SERS signal (~10 times) due to localization of the hot spots at the AgNDs compared to pure Ag nanoparticles substrate (for 10-6 M). The improved SERS performance of the ZnONR@AgND is attributed to an effective charge transport within the plasmonic AgND, semiconducting ZnO, and the R6G molecule facilitated by the ability of the heterostructure to accommodate multiple hot-spots in a limited volume. This work demonstrates that the SERS activity of semiconductor-based hybrid Raman substrate can be significantly improved by effectively tuning the metal nanoparticle size and density along the length of such hybrid nanowires.
dc.description.statementofresponsibility by Suresh kumar Vemuri, Sakshum Khanna, Utsav, Sagar Peneliya, Vishakha Takhar, Rupak Benerjee and Indrajit Mukhopadhyay
dc.format.extent vol. 639
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject ZnO en_US
dc.subject Metal nanoparticles en_US
dc.subject FESEM en_US
dc.subject SERS en_US
dc.subject Silver nanodomes en_US
dc.title Fabrication of silver nanodome embedded zinc oxide nanorods for enhanced Raman spectroscopy en_US
dc.type Article en_US
dc.relation.journal Colloids and Surfaces A: Physicochemical and Engineering Aspects

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