title: Core-satellites assembly of silver nanoparticles on a single gold nanoparticle via metal ion-mediated complex.
abstract: We report core-satellites (Au-Ag) coupled plasmonic nanoassemblies based on bottom-up, high-density assembly of molecular-scale silver nanoparticles on a single gold nanoparticle surface, and demonstrate direct observation and quantification of enhanced plasmon coupling (i.e., intensity amplification and apparent spectra shift) in a single particle level. We also explore metal ion sensing capability based on our coupled plasmonic core-satellites, which enabled at least 1000 times better detection limit as compared to that of a single plasmonic nanoparticle. Our results demonstrate and suggest substantial promise for the development of coupled plasmonic nanostructures for ultrasensitive detection of various biological and chemical analytes.
authors: World Class University Program of Chemical Convergence for Energy & Environment, School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors: Inhee
authors: I
authors: Choi
authors: Hyeon Don
authors: HD
authors: Song
authors: Suseung
authors: S
authors: Lee
authors: Young In
authors: YI
authors: Yang
authors: Taewook
authors: T
authors: Kang
authors: Jongheop
authors: J
authors: Yi
mesh_terms: D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008670:Metals / Q000032:analysis*; D012680:Sensitivity and Specificity; D012834:Silver / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
chemical_list: D008670:Metals; D012834:Silver; D006046:Gold