Surface-enhanced Raman scattering from silver nanostructures with different morphologies

Development of high-sensitive, reproducible colloidal surface-enhanced Raman spectroscopy active substrate using silver nanocubes for potential biosensing applications

“…Albeit of its nonuniformity, colloidalbased SERS substrates uphold its position for easiness in preparation and for the analysis of biological samples in colloidal form itself. Even though silver nanocube (AgNC)-based SERS active substrates have been synthesized via solvothermal method earlier, 16,17 we could achieve a detection limit of 10 −17 M and an enhancement factor of 1.2 × 10 8 , which is three orders higher compared to the reported value 17 of 2.96 × 10 5 . We herein report the way of dipole generation and electric field enhancement on AgNCs during surface plasmon resonance through finitedifference time-domain (FDTD) method simulation.…”

“…Uniform-sized AgNCs were synthesized via the solvothermal method following previous reports. 16 Briefly, 20 ml ethylene glycol (EG) solution of 20 mM NaCl was vigorously stirred for 1 h after addition of 0.8 g of polyvinylpyrrolidone. The mixed solution was added drop-wise into 20 ml of a magnetically stirred EG solution of AgNO 3 (0.15 M) for 1 h. Afterward, the solution was transferred into 100 ml teflon-lined autoclave and was kept at 160°C for 12 h in an electric oven.…”

Influence of dealloying solution on the microstructure of nanoporous copper through chemical dealloying of Al75Cu25ribbons

“…Nanoporous metals (NPMs), which possess high specific surface area and tunable porosity, have attracted considerable interest in catalysis [1], sensors [2], surface-enhanced Raman scattering (SERS) substrates [3,4], lithium ion batteries [5], etc. Generally, NPMs can be prepared by template methods [6], like liquid-crystal template [7] and colloidal crystal template [8].…”

Design and characterization of nanostructured SERS substrates based on gold nanostars

“…It is known that using the methods of colloidal synthesis various nanostructures could be synthesized, which are suitable for SERS substrates, for instance: core-shell [10] nanostructures, nanoparticles (NPs) with different shapes: spherical, triangles, cubes, wires and others [11]. Nanostructures in the form of stars could be the new type of efficient substrates for the SERS diagnostics [12].…”