Figure 3.

Control of nanospacers. (a) A single molecule trapped within a gap between a gold film and a gold nanoparticle. Adapted with permission from ref (30). Copyright 2016 Springer Nature Limited. (b) CdSe/ZnSe QDs trapped within a gap between a gold film and a silver nanocube. Reproduced with permission from ref (51). Copyright 2015 The Author(s) licensed under a CC-BY Creative Commons Attribution 4.0 License. (c) CdSe QDs coupled to a SiO₂ coated silver nanowire, with controlled QD-nanowire distance and (d) PL lifetime for different gap thicknesses. Adapted with permission from ref (55). Copyright 2007 American Physical Society.