Sonochemically synthesized Ag nanoparticles as a SERS active substrate and effect of surfactant

Green synthesis of silver nanoparticles using extract of Parkia speciosa Hassk pods assisted by microwave irradiation

“…Another method of green synthesis is the use of more effective, energy efficient and rapid methods of preparation. Microwave irradiation (MW), sonochemistry and other rapid techniques have been used [16], [17], [18], [19], [20], [21]. In previous reports, MW has been utilized for synthesis of Ag NPs, ZnO NPs, magnetite, TiO 2 and other nanoparticles with some advantages, the most important being the rapid and efficient nature of the procedure [10], [14], [22], [23], [24], [25], [26].…”

SERS Hotspot Engineering by Aerosol Self‐Assembly of Plasmonic Ag Nanoaggregates with Tunable Interparticle Distance

“…Lower LOD and higher EF are obtained for substrates immersed in R6G solution for a longer time, that increases the actual surface concentration of molecules. [ 56 , 57 ] For example, the LOD of porous Ag SERS substrates increases from 10 −8 to 10 −13 m when the R6G adsorption time increases from a few minutes to 8 h. [ 58 ] In our SERS sensing surfaces, even though there is a short adsorption time of 2.5 min, their SERS performance and EF reach competitive values (Table S3 , Supporting Information). The above results were also reproduced using a portable Raman spectrometer instead of a confocal Raman microscope (Figure S8 , Supporting Information).…”

Self-assembled dendrite Ag arrays with tunable morphologies for surface-enhanced Raman scattering

“…Scientists have found that the Raman signals could be easily increased even by a million-fold or more if the materials to be analyzed were absorbed on rough metal surfaces or on aggregates of metal nanoparticles [4], such as the noble metal gold (Au), sliver (Ag), platinum (Pt) and palladium (Pd) [5]. Specially, noble metal Ag have been widely employed in SERS owing to the great surface plasmonic enhancement(SPR) [6,7], which has been considered a most promising substance for sensitive biological identifications [8] and detection for its insensitive to humidity, oxygen and quenchers [9]. At the same time, the size, morphology and monodispersity of Ag have a strong effect on the Raman scattering intensity.…”