Strong surface enhanced Raman scattering from gold nanoarrays obtained by direct laser writing

INERA Conference: Vapor Phase Technologies for Metal Oxide and Carbon Nanostructures

物理学;材料科学

Ivanov, V.G.^1 ; Todorov, N.D.^2 ; Petrov, L.S.^1 ; Ritacco, T.^2,3 ; Giocondo, M.^2 ; Vlakhov, E.S.^4

Sofia University, Faculty of Physics, 5 James Bourchier Blvd., Sofia

1164, Bulgaria^1

Consiglio Nazionale Delle Ricerche, Istituto di Nanotecnologia, Nanotec SS di Cosenza, Ponte P. Bucci Cubo 31C, Rende (CS)

87036, Italy^2

Universita della Calabria, Dipartimento di Fisica, Ponte Pietro Bucci Cubo 33/B, Rende (CS)

87036, Italy^3

Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Sofia

1784, Bulgaria^4

关键词: Direct laser writing;    Glass substrates;    Metallic precursor;    Nanoparticles sizes;    Photo reduction;    SERS enhancement;    Sers enhancement factors;    Surface enhanced Raman Scattering (SERS);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/764/1/012023/pdf
DOI  :  10.1088/1742-6596/764/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We report for surface enhanced Raman scattering (SERS) from arrays of gold nanoparticles produced by 2-photons photo-reduction of the metallic precursor (HAuCl4) hosted in a Poly-Vinyl Alcohol (PVA) matrix, on glass substrates. Samples with the same pattern but featuring different nanoparticles size and density were obtained by varying the writing laser power and scanning speed. The Raman spectra were recorded from samples immersed in a solution of rhodamine-6G (R6G), as well as, after exposure of the samples in xylene. SERS enhancement factors of up to ∼104were obtained for both analytes. The measurements show that the SERS enhancement is maximized on golden strips produced at higher writing laser power and lower scanning speed, where closer nanoparticles packing is obtained..