Tuning Localized Surface Plasmon Resonances by Self-Assembly in Multi- Metal Nanostructures
Research output: Other conference contribution › Paper, poster or abstract › Scientific
|Publication status||Published - 17 Sep 2017|
|Event||International Symposium on DSA - University of Chicago, Chicago, United States|
Duration: 17 Sep 2017 → 19 Sep 2017
Conference number: 3
|Conference||International Symposium on DSA|
|Period||17/09/17 → 19/09/17|
structures. We demonstrate that combining plasmonic nanoarrays with block copolymer self-assembly allows realization of multi-metal structures that display altered optical behavior.
A high speed electron-beam lithography technique (Dots-On-The-Fly) was used to fabricate arrays of thin, plasmonic gold structures, which then acted as a directing template for the self-assembly of asymmetric poly(styrene-b-2-vinyl pyridine) (PS-P2VP). Solvothermal annealing resulted in the PS-P2VP assembling in the gap regions of the plasmonic structures. The P2VP domains could then be converted into a variety of metals such as Au, Ag or Pt to populate the gap with plasmonic nanoparticles. 3D and 2D computational modeling was used to estimate the effects of geometry and material combinations on the far field spectrum and the local field-enhancement in the gap. Self-assembled
multimaterial plasmonic devices have various applications in near field sensing, nonlinear optical interactions and photocatalysis.