Nanomaterials have attracted much attention because of their unique optical, electrical, magnetic, and mechanical properties which are different from their bulk counterparts. The distinct characteristics of nanomaterials generally depend on their size and shape. Especially, optical and electrical properties of 0 D nanoparticles and 1 D nanorods can be precisely tuned by adjusting the size and shape. For example, Au nanorods have two plasmon bands in the range of visible and near IR wavelengths, which can be finely tuned by changing the aspect ratio of the length to the diameter of nanorods. However, a control of arrangement of nanorods on a solid substrate as well as in a solution is necessary because the interparticle coupling of nanorods changes the plasmon bands in position and broadness. In this study, Au nanorods were first selectively placed at the periphery of spherical micelles of diblock copolymers, which form a single layer in nano-scale pseudo-hexagonal order, by controlling the relative size between nanorods and micelles. Then, the organization of micelles with nanorods was altered by solvent annealing, which can affect the plasmonic coupling of nanorods. Such changes were characterized by observing the plasmonic extinction of nanorods as well as the microscopic images.

Selective placement of gold nanorods in a diblock copolymer micellar film and their reorganization by solvent annealing

247th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.