A photo-responsive p-Si/TiO₂/Ag heterostructure with charge transfer for recyclable surface-enhanced Raman scattering substrates

Abstract

Semiconductor - metal heterostructure is an attractive Surface-Enhanced Raman Scattering (SERS) -active materials, which can boost the performance effectively because of the synergistic contribution of Electromagnetic (EM) and charge transfer...

Food Safety Issues in the Oltrepò Pavese Area: A SERS Sensing Perspective

“…An increasingly body of literature is available on the use of SERS for glyphosate detection both as a single detection technique as well as part of a combined approach [43][44][45]. We point out that the majority of research papers [39,41,42,[44][45][46][47][48][49][50][51] illustrates studies on Gly detection by using Ag nanoparticles as an enhancing active medium, and bench-top Raman instrumentation to perform the measurement, reaching Limits Of Detection (LODs) generally below the MRLs imposed by the European Union (EU). In contrast, refs [52,53] present two different research works exploiting, respectively, Au-Ag nanochains for a novel anti-interference, indirect detection, reaching a LOD of 5 µg/L (5 ppb) and Au nanoparticles in a needle tip enrichment approach with an estimated LOD of 7.5 nmol/L (≈1.3 ppb) (see Figure 3 for an illustration of the sensing mechanism and related SERS results).…”