Repozytorium publikacji - Politechnika Gdańska

tCurrently, roughened metal nanostructures are widely studied as highly sensitive Raman scattering sub-strates that show application potential in biochemistry, food safety or medical diagnostic. In this workthe structural properties and the enhancement effect due to surface enhanced Raman scattering (SERS) ofhighly ordered nano-patterned titanium templates covered with thin (5–20 nm) gold films are reported.The templates are formed by preparation of a dense structure of TiO2nanotubes on a flat Ti surface(2 × 2 cm2) and their subsequent etching down to the substrate. SEM images reveal the formation ofhoneycomb nanostructures with the cavity diameter of 80 nm. Due to the strongly inhomogeneous dis-tribution of the electromagnetic field in the vicinity of the Au film discontinuities the measured averageenhancement factor (107–108) is markedly higher than observed for bare Ti templates. The enhancementfactor and Raman signal intensity can be optimized by adjusting the process conditions and thicknessof the deposited Au layer. Results confirm that the obtained structures can be used in surface enhancedsensing.

Autorzy

• Katarzyna Grochowska,
• Katarzyna Siuzdak,
• Mikołaj Sokołowski link otwiera się w nowej karcie ,
• dr hab. inż. Jakub Karczewski link otwiera się w nowej karcie ,
• dr inż. Mariusz Szkoda link otwiera się w nowej karcie ,
• Prof. Gerard Sliwiński