High refractive index in low metal content nanoplasmonic surfaces from self-assembled block copolymer thin films

Abstract

Block copolymer-templated gold nanostructured surfaces of high refractive index due to controlled plasmonic nanoparticle shape.

Fractionation of block copolymers for pore size control and reduced dispersity in mesoporous inorganic thin films

“…macroscopic phase separation, increase in the pore size dispersity, multimodal pore size distribution and a decrease in the longrange order of the structure, 67 which limits their applicability in particular when both mean pore diameter and dispersity are important. Our findings are equally relevant for other BCP techniques, such as sequential infiltration synthesis 68,69 or aqueous metal reduction, 70,71 where nanostructured BCP films serve as scaffolds for multistep fabrication procedures post self-assembly.…”

Selective surface-enhanced Raman scattering in a bulk nanoplasmonic Bi2O3-Ag eutectic composite

“…Alternatively, combining various NPs in a single composite may result in a material tunable in a wide wavelength range. Novel fabrication methods, such as DSE [16], NPDD [15], block-copolymer-based techniques [19] or nanoparticles aligned in porous matrices [40] can enable manufacturing of such advanced materials.…”

“…Even the reported 3D SERS platforms are not genuine volumetric systems but networks of NPs embedded on various surfaces or on other nano-/microparticles [12][13][14]. However, recent advances in manufacturing bulk nanoplasmonic composites via methods such as directional solidification of eutectics (DSE), nanoparticle direct doping (NPDD) and block co-polymer based techniques [15][16][17][18][19] have opened new paths for creating three-dimensional materials potentially suitable for SERS. It provides the necessary toolkit to develop novel bulk SERS-active materials.…”

Large area Al2O3–Au raspberry-like nanoclusters from iterative block-copolymer self-assembly

“…Out-of-plane PS-b-P2VP lamellae were obtained directly by spin-coating of a 1 wt% solution of PS 102k -b-P2VP 97k (BCP3) in PGMEA onto the modied Si wafers. 15…”

“…11,12 Subsequently, the production of large scale arrays of nanoparticles (NP) has been demonstrated by the selective hybridization with metallic or dielectric species of the nanostructured BCP scaffolds. [13][14][15][16][17] However, the energy minimization during self-assembly process for common di-BCPs limits the number of accessible NPs patterns such as lines or dots. 11,12 Multi-BCPs represent a possible alternative, giving access to many more morphologies, however accessing multi-BCPs relies on complex synthesis.…”