Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5364588 | Applied Surface Science | 2012 | 5 Pages |
We proposed a rapid, simple and room-temperature method to fabricate hierarchical silver nanocap arrays, in which hot spots could be facilely engineered on three-dimensional curved surface. Both optical property and surface-enhanced Raman scattering (SERS) activity displayed non-monotonic Ag thickness dependence. Furthermore, the simulation results obtained by finite-difference time-domain (FDTD) method reveal that hot spots intensity and density on three-dimensional curved surface significantly vary and strongly depend on deposited Ag thickness. The investigation opens a possibility for facile fabrication of SERS substrate with promising hot spot engineering on three-dimensional surface and extremely high SERS activity.
Graphical abstractDownload full-size imageHighlights⺠Rapid and room-temperature method to fabricate hierarchical Ag array is proposed. ⺠Arrays consist of submicrosized ordered caps with nanoscale Ag particles on surface. ⺠Controlling Ag deposition thickness leads to various surface roughnesses. ⺠Both optical property and SERS activity display non-monotonic behaviors. ⺠Hot spots engineering on three-dimensional curved surface is facilely achieved.