Microwave monitoring of silver nanoparticle sintering for surface‐enhanced Raman scattering substrates

Abstract

One of the most widely used methods for surface‐enhanced Raman scattering (SERS) employs silver or gold nanoparticles either in colloidal suspension or in the dry‐drop form. In such substrates the SERS amplification factors depend critically on the interparticle distances. Here, we report that microwave absorption as a function of temperature in dry‐drop substrates can be used as a probe to demarcate temperature regions for thermal annealing to produce SERS substrates with very high amplification factors. Copyright © 2011 John Wiley & Sons, Ltd.

Thermally and photoinduced structural and chemical changes of a silver nanocube array on Au(111)

“…However, when the sintering of AgNCs occurs, the G band intensity is expected to be suppressed because of the absence of the hot spots of AgNCs. 63 As seen in the temperature dependence of the AgNC height ( Fig. 5 ), a slight decrease in AgNC height was confirmed at 222 °C.…”

Recent advances in linear and nonlinear Raman spectroscopy. Part VII

“…Figueroa et al . reported that microwave absorption as a function of temperature in dry‐drop substrates can be used as a probe to demarcate temperature regions for thermal annealing to produce SERS substrates with very high amplification factors . Fu and co‐workers investigated plasmonic enhancement arising from bimetallic (Au/Ag) hierarchical structure and addressed the fundamental issues relating to the design of multilayered nanostructures for SERS.…”

Denoising of stimulated Raman scattering microscopy images via deep learning

“…Stimulated Raman scattering (SRS) microscopy is a powerful optical imaging technique that uses the intrinsic vibrational contrast of molecules to provide chemical maps of biological cells and tissues. Due to its label-free imaging capability and subcellular spatial resolution, SRS imaging has shown great promise in many biological and biomedical applications such as metabolic studies, drug imaging, tissue diagnosis [1][2][3][4][5][6][7][8]. Recent work has shown that twocolor SRS imaging can generate virtual H&E images that are useful for intraoperative cancer detection and margin analysis [9,10].…”