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The analysis describes the implementation of the chemically patterned microspheres for controlled nanoparticle assembly in the construction of surface enhanced Raman spectroscopy (SERS) hot spots. The approach facilitates the analysis of the plasmonic and other optically active nanostructures that highly depend on size, shape and crystallinity.

A simple strategy for placing analyte molecules in hot spots between closely spaced nanowires leading to intense surface-enhanced Raman spectroscopy (SERS) enhancement is described. The results are highly reproducible probably because of the regularity of the SERS substrate which consists of highly ordered and regular silver nanowires fabricated in porous aluminum oxide (PAO).

The article provides information on a study that investigates hot spots in silver nanowire bundles for surface-enhanced Raman spectroscopy. It demonstrated a simple strategy for obtaining hot spots of the form "metal/molecule/metal", which automatically and eventually positions many analyte molecules in the junction between neighboring tips of silver nanowires that were fabricated in porous aluminum oxide (PAO) then exposed by the controlled dissolution of the alumina matrix. The article informs that silver nanowires were grown in highly ordered PAO template by AC electrodeposition.