title: Raman-active two-tiered Ag nanoparticles with a concentric cavity.
abstract: A two-tiered Ag nanoparticle containing a cavity at the center of each nanoparticle is generated by two simple steps of nano-imprinting and metal vacuum deposition. It enables sub-zeptomole detection of organic molecules and five orders of the dynamic sensing range.
authors: Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
authors: Jung-Sub
authors: JS
authors: Wi
authors: Sweta
authors: S
authors: Sengupta
authors: Robert J
authors: RJ
authors: Wilson
authors: Mingliang
authors: M
authors: Zhang
authors: Mary
authors: M
authors: Tang
authors: Shan X
authors: SX
authors: Wang
mesh_terms: D004560:Electricity; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D011137:Polystyrenes / Q000737:chemistry; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D011137:Polystyrenes; D012834:Silver