Hot-Spot Engineering in Polygonal Nanofinger Assemblies for Surface Enhanced Raman Spectroscopy
Citations Over TimeTop 10% of 2011 papers
Abstract
Multiparticle assemblies of nanoscale structures are the fundamental building blocks for powerful plasmonic devices. Here we show the controlled formation of polygonal metal nanostructure assemblies, including digon, trigon, tetragon, pentagon, and hexagon arrays, which were formed on top of predefined flexible polymer pillars that undergo self-coalescence, analogous to finger closing, with the aid of microcapillary forces. This hybrid approach of combining top-down fabrication with self-assembly enables the formation of complex nanoplasmonic structures with sub-nanometer gaps between gold nanoparticles. On comparison of the polygon-shaped assemblies, the symmetry dependence of the nanoplasmonic structures was determined for application to surface enhanced Raman spectroscopy (SERS), with the pentagonal assembly having the largest Raman enhancement for the tested molecules. Electromagnetic simulations of the polygonal structures were performed to visualize the field enhancements of the hot spots so as to guide the rational design of optimal SERS structures.
Related Papers
- Study on PMMA performace by nanometre SiO_2 modified(2004)
- Study on Epoxy Resin by Nanometer CaCC_3 Modified(2004)
- Modification of Nanometer TiO_2 and Research Progress in the Application of Nanometer TiO_2 in the Leather Industry(2013)
- DEVELOPMENT OF NANOMETER V_2O_5 CATALYST(2002)
- Effect of nanometer-silica on UV curable dispersing system and nanometer-composites(2003)