Efficient SERS substrates based on laterally ordered gold nanostructures made using interference lithography

Abstract

Laterally ordered gold nanoisland arrays made using interference lithography has been investigated in this work as SERS substrates. The developed substrates demonstrate performance in enhancing Raman signal of common dye analyte (crystal violet (CV)) comparable to commercial SERS substrates, with the lowest detectable concentration of CV ~10 −6 …10 −7 M. They can be reused after heat treatment at 300 °C without any drop of performance. Furthermore, we found a principal difference in the effect of annealing of SERS substrates before deposition of the analyte molecules and additional in situ annealing (with molecules) on the intensity of Raman signal. Possible physical origin of the latter effect has been discussed.

Контрольована Агрегація Плазмонних Наночастинок Для Підвищення Ефективності SERS-підкладок

“…The SERS process involves the complex interaction of three objects: photons, targeted molecules, and metal nanostructures forming the basis of SERS substrates. The latter can be classified into two main categories: structured metal surfaces and metal NPs precipitated from colloidal solutions [10][11][12][13][14][15][16][17].…”

Experimental investigation for roll-to-plate embossing of ordered micro-pyramid array on the silver sheet

“…Surface-enhanced Raman scattering (SERS) is an ultrasensitive, label-free, non-contact technology for trace analysis and single-molecule detection [1][2][3], which is widely used for drug testing [4], pesticide residues detection [5] and cancer 5 Author to whom any correspondence must be addressed.…”