Optically coupled gold nanostructures: plasmon enhanced luminescence from gold nanorod-nanocluster hybrids

Abstract

Photoluminescent (PL) gold nanoclusters (AuNCs) show many advantages over conventional semiconductor quantum dots, however, their application potential is limited by their relatively low absorption cross-section and quantum yield. Plasmonic enhancement...

Towards site-specific emission enhancement of gold nanoclusters using plasmonic systems: advantages and limitations

“…Another approach to PL enhancement measurement was therefore used in the last experiment. In this method, which we first introduced in our previous report, 45 three solutions are always studied at the same time – pure AuNCs, AuNRs@AuNCs, and AuNCs mixed with AuNRs but not attached to them (denoted as AuNRs + AuNCs). The measurement then proceeds in many steps, where the number of AuNCs added to each sample is gradually increased.…”

Gold nanocluster composites: preparation strategies, optical and catalytic properties, and applications

“…96 While for AuNR which was often used in the MEF effect, 97 the maximum photoluminescence enhancement can be achieved only when the distance of AuNC and AuNR was reduced to 5 nm. 98…”

Engineering Plasmon-Enhanced Fluorescent Gold Nanoclusters Using Bovine Serum Albumin as a Novel Separation Layer for Improved Selectivity

“…The fluorescence intensity of AuNRs@SiO 2 @AuNCs was increased by 2-fold through surface plasmonic coupling. Pavelka’s group also obtained AuNRs@SiO 2 @AuNCs plasmon nanomaterials by combining AuNCs with AuNRs . Through the plasmon coupling, the fluorescence intensity of AuNRs@SiO 2 @AuNCs was increased by 4 times.…”

“…Pavelka's group also obtained AuNRs@SiO 2 @AuNCs plasmon nanomaterials by combining AuNCs with AuNRs. 17 Through the plasmon coupling, the fluorescence intensity of AuNRs@ SiO 2 @AuNCs was increased by 4 times. In comparison with the above two strategies, the plasmon-enhanced luminescent strategies can not only improve the photoluminescence efficiency of AuNCs, but the as-prepared AuNCs also exhibit high pH stability and biocompatibility.…”