AgNPs decorated 3D bionic silicon nanograss arrays pattern with high-density hot-spots for SERS sensing via green galvanic displacement without additives

Abstract

The Si nanograss arrays are directly grown on Si substrate via catalyst-assisted VLS growth and subsequent plasma interaction. AgNPs were rapidly immobilized on Si nanograss arrays for SERS sensing, without any organic reagents and additives.

Constructing a 3D interconnected network of Ag nanostructures for high-performance SERS detection of food coloring agents

“…Wang et al prepared a SERS substrate using Ag NP modified Si nanograss arrays, and the detection limit of Rhodamine 6G (R6G) was 0.1 pM. 17 Lo Faro et al mixed silver nitrate and hydrofluoric acid solution to synthesize a high-density silver dendrite SERS active substrate and detected biomolecules (lysozyme). 18 Liu et al prepared SERS substrates by in situ synthesis of silver nanoparticles on a fluorosilicate silicon wafer and discussed their SERS performance.…”

Surface-Enhanced Raman Scattering Active Core-Shell Ag NPs@Carbon Dots with Enzyme-Mimicking Activities for Label-Free Measurement Cholesterol

“…The Raman signal experiences significant amplification when once the analyte molecules come close to the "hot spot" field [24]. Currently, researchers have reported abound of materials loaded with Ag NPs to obtain homogeneous structures, such as metallic oxide [25], MOF [22], carbon materials [26,27], polymer [28,29] and silica [30,31], which are conductive to improving the stability of Ag NPs and generating a large number of "hot spots". Among the above-mentioned SERSactive substrates, the carbon-based materials are of particular interest as the Raman signals of target molecules can be enhanced through both chemical enhancement (CE) and EM by combining with plasmonic nanoparticles [32].…”