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This paper reports on the assessment of a simple and economical self-assembly methodology to obtain reproducible substrates onto the optical fiber tip for surface-enhanced Raman spectroscopy (SERS) applications. The method relies on the use of the nanosphere lithography of the optical fiber end facet. A careful analysis has been carried out to investigate the capability of the proposed procedure to...
A new nanosphere lithography technique is presented to produce a periodic nanocavities of two sizes. The process starts by deposition of a bilayer of polystyrene microspheres on photoresist through self assembly as a mask. The spheres act as microlenses to direct UV light both to the centers of the bottom spheres and between these centers, resulting in bigger and smaller nanocavities. The appearance...
An electroless chemical etching technique using polystyrene nanospheres as self-assembled mask is developed to fabricate size-controllable, periodic silicon nanopillars (NPs) and subsequent nanocones (NCs) arrays. The Si NCs are obtained based on the NPs structure using cost-effective ammonia-related etching chemistry. The diameter, height, and periodicity of the NCs can be systematically controlled...
Ordered GeSi nanoislands were fabricated in combination of self-assembly and nanosphere lithography on Si (001) substrates. Well ordered pits in a hexagonal lattice on Si (001) substrates are readily obtained via nanosphere lithography. The preferential nucleation of GeSi nanoislands in the pits results in laterally ordered nanoislands on such prepatterned Si (001) surface during Ge deposition. Multilayer...
We use the self-assembled polystyrene nanosphere monolayer pattern to replace photoresist mask for the fabrication of 2D nanostructures on various substrates. The optical properties of these artificial structures are measured and compared with theoretical calculation.
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