Document Type
Article
Publication Date
2010
Publication Title
Journal of Materials Chemistry
Volume
20
First page number:
6891
Last page number:
6895
Abstract
Hot spots have the contradictively geometrical requirements for both the narrowest interstices to provide strong near-field coupling, and sufficient space to allow entrance of the analytes. Herein, a two-step method is employed to create hot spots within hybrid nanostructures, which consist of self-supported nanoporous gold films with the absorbed probes and subsequent nanoparticle conjugates without surface agents or mechanical motion. The molecules confined into 1 nm interstice exhibit 2.9 × 107 times enhancement in Raman scattering compared to pure nanoporous gold. Giant enhancement primarily results from strong near-field coupling between nanopore and nanoparticle, which is theoretically confirmed by finite-difference time-domain simulation. Excellent detection limits toward 10−11 mol l−1 offer an opportunity to track spatial orientation of single molecule and engineer hybrid nanostructures as commercial SERS substrates.
Keywords
Gold films; Nanostructured materials; Nanostructures; Raman effect
Disciplines
Electrical and Computer Engineering | Electronic Devices and Semiconductor Manufacturing | Nanoscience and Nanotechnology | Semiconductor and Optical Materials
Language
English
Permissions
© Royal Society of Chemistry 2013
Repository Citation
Qian, L.,
Das, B.,
Li, Y.,
Yang, Z.
(2010).
Giant Raman Enhancement on nanoporous Gold Film By Conjugating with nanoparticles for Single-molecule Detection.
Journal of Materials Chemistry, 20
6891-6895.
https://digitalscholarship.unlv.edu/ece_fac_articles/558
Included in
Electronic Devices and Semiconductor Manufacturing Commons, Nanoscience and Nanotechnology Commons, Semiconductor and Optical Materials Commons
