Large-area crack-free Au–SiO2 2D inverse opal composite films: Fabrication and SERS applications

Achieving Functionality and Multifunctionality through Bulk and Interfacial Structuring of Colloidal-Crystal-Templated Materials

“…Due to structural effects, the surface enhancement increases significantly beyond what would be observed for the corresponding nonstructured or disordered templated metals . Even when gold nanoparticles are supported on a dielectric inverse opal structure (e.g., silica inverse opals), a greater Raman signal enhancement is obtained than for unsupported gold nanoparticles or Au–SiO 2 nonphotonic structures . The plasmonic enhancement can then be used to increase sensitivity of different biosensor platforms with specific binding groups bonded to the metal in the 3DOM structure .…”

“…130 Even when gold nanoparticles are supported on a dielectric inverse opal structure (e.g., silica inverse opals), a greater Raman signal enhancement is obtained than for unsupported gold nanoparticles or Au−SiO 2 nonphotonic structures. 131 The plasmonic enhancement can then be used to increase sensitivity of different biosensor platforms with specific binding groups bonded to the metal in the 3DOM structure. 132 The complexity of a 3DOM device that relies on localized surface plasmon resonance can be increased even more as illustrated in the following example of a biomedical application.…”

Coupling Au-loaded magnetic frameworks to photonic crystal for the improvement of photothermal heating effect in SERS

“…To solve these problems, more efforts have been dedicated to improving the PC structure. Subramanian et al 38 proposed a hexagonal inverse opal PC for Au NPs embedded in the silica matrix. It could prevent the formation of excess Au agglomerates and avoid SPR-induced local heating under a laser power of 4 mW.…”