Versatile template-directed synthesis of gold nanocages with a predefined number of windows

Extremely symmetrical gold nanocages might be produced with a controllable variety of round home windows of both 2, three, four, 6 or 12 by way of an authentic fabrication route. The artificial pathway consists of three important phases: the synthesis of silica/polystyrene multipod templates, the regioselective seeded progress of a gold shell on the unmasked a part of the silica floor and the event of gold nanocages by dissolving/etching the templates. Electron microscopy and tomography present proof of the symmetrical options of the as-obtained nanostructures. The optical properties of nanocages with four and 12 home windows had been measured on the single particle stage by spatial modulation spectroscopy and correlated with numerical simulations based mostly on finite-element modeling. The brand new multi-step synthesis strategy reported right here additionally permits the synthesis of rattle-like nanostructures by filling of the nanocages with a visitor nano-object. With the potential to regulate the chemical composition, measurement and geometry of each the visitor particle and the host cage, it opens new routes in direction of the fabrication of hole nanostructures of excessive curiosity for quite a lot of functions together with sensing units, catalytic reactors and biomedicine.

Graphical abstract: Versatile template-directed synthesis of gold nanocages with a predefined number of windows

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