Silver nanoprisms/graphene oxide/silicon nanowires composites for R6G surface-enhanced Raman spectroscopy sensor

2020 Biointerface Research in Applied Chemistry  
In this study, Silver nanoprisms/Graphene Oxide/Silicon nanowires (AgNPr/GO/SiNWs) nanocomposites have been fabricated for Surface-Enhanced Raman Spectroscopy (SERS) of Rhodamine 6G (R6G). The SiNWs have been synthesized using the metal-assisted chemical etching method. The surface morphologies of the SiNWs samples have been investigated using scanning electron microscopy. By varying the etching time from 5 to 30 min, the nanowire lengths have been tuned from 2 to 10 µm. While the average
more » ... re diameter remained unaffected (30-60 nm) with the increase in etching time, increments of nanowires length were found to alter the bundle morphology. The final SERS structure is obtained by depositing the GO layer followed by AgNPr. The obtained SERS sensor exhibited an enhanced efficiency as compared to AgNPr/SiNW matrix. The results demonstrate that a maximum efficiency factor of 6.1×1010 could be achieved with sensor fabricated with 30 min etched SiNWs.
doi:10.33263/briac103.670674 fatcat:uxel3kuugbgatoo6vrzvt4stja