Tuning the plasmonic response of periodic gold nanodisk arrays for urea sensing

Laser interference lithography (LIL) was used to fabricate gold nanodisk arrays on glass which was studied as surface-enhanced Raman spectroscopy (SERS) substrates. The Raman response of varying array periods (250 nm, 300 nm, 344 nm, 395 nm, and 446 nm) was compared using the chemical rhodamine 6G....

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Bibliographic Details
Published in:Journal of materials science 2024-04, Vol.59 (15), p.6497-6508
Main Authors: Singh, Gaurav Pal, Fuhrmann, Bodo, Syrowatka, Frank, Schilling, Joerg, Sardana, Neha
Format: Article
Language:English
Subjects:
Arrays
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystallography and Scattering Methods
Finite element method
Glass substrates
Gold
Laser arrays
Lasers
Materials for Life Sciences
Materials Science
Polymer Sciences
Raman spectroscopy
Rhodamine 6G
Solid Mechanics
Spectrum analysis
Substrates
Ureas
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Summary:Laser interference lithography (LIL) was used to fabricate gold nanodisk arrays on glass which was studied as surface-enhanced Raman spectroscopy (SERS) substrates. The Raman response of varying array periods (250 nm, 300 nm, 344 nm, 395 nm, and 446 nm) was compared using the chemical rhodamine 6G. The 300-nm period displayed the highest SERS enhancement among the tested LIL substrates. Experimental transmission measurements and their finite element method (FEM) simulations were taken to understand the optical response of the LIL substrates. The 300-nm-period LIL substrate was used to detect urea to confirm its practical use as a SERS substrate. The enhancement factor of the 300-nm-period substrate was 2.3 × 10 6 . Furthermore, the detection limit of urea was 0.05 mM for the optimized substrate. Graphical Abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-024-09599-0