title: Site-selective synthesis of silver nanoparticles in pre-patterned trenches and their localized surface plasmon resonances.
abstract: A method for depositing silver nanoparticles in a pre-patterned trench by site-selective synthesis is described. In the trench patterns with various shapes, silver nanoparticles can be selectively nucleated and grown only on polyvinylpyrrolidone (PVP) domains by attraction (or repulsion) between silver ions and the hydrophilic PVP island domains in a silica matrix of the trench (or the hydrophobic fluorosilane layer). Regarding the silver nanoparticles in the trench, localized surface plasmon resonance (LSPR) could be excited by obliquely incident light, reradiating the enhanced electromagnetic field in the far- and near-fields. Even in the case of a large angle incidence in total internal reflection (TIR), the patterned silver nanoparticle clusters underwent strong scattering with a high intensity, due to the LSPR effect.
authors.affiliation: National Creative Research Center for Active Plasmonics Application Systems, Inter-University Semiconductor Research Center and School of Electrical Engineering, Seoul National University, Seoul, Republic of Korea.
authors.forename: Hansik
authors.initials: H
authors.lastname: Yun
authors.forename: Il-Min
authors.initials: IM
authors.lastname: Lee
authors.forename: Sang Hyuk
authors.initials: SH
authors.lastname: Im
authors.forename: Seung-Yeol
authors.initials: SY
authors.lastname: Lee
authors.forename: Byoungho
authors.initials: B
authors.lastname: Lee