Nanostrucure of Hybrid Plasmonic-Potonic Crystal Formed on Gel-Immobilized Colloidal Crystal Observer by AFM after Drying

摘要

Aiming at fabrication of hybrid plasmonic-photonic crystals, gel-immobilizedcolloidal crystals made of a polystyrene colloidal suspension and an N-(Hydroxymethyl)acrylamid-based gel were immersed into an aqueous dispersion of goldnanoparticles. Atomic force microscope (AFM) observations have been performedfor the gel-immobilized colloidal crystals with gold nanoparticles deposited ontheir surfaces. In the present study, the diameter of a colloidal sphere wasc.a. 190 nm. The diameter of a gold nanoparticle was the same as in apreliminary study, c.a. 40 nm. Various immersion times up to two hours weretested. Surface of a sample of 2 hr immersion has been observed. Prior to theAFM observation, the sample was dried in a desiccator for 18 hrs. We haveidentified a face-centered cubic {111} structure of a colloidal crystal ofnearly close packing. Nanoparticles isolated with one another have beenobserved on the surface of gel-immobilized crystal, which can be regarded asgold nanoparticles from their sizes.