Metal nanoparticles with gain toward single-molecule detection by surface-enhanced Raman scattering.

Nano Lett 2010 Jan;10(1):243-9

Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.

Single-molecule detection via surface-enhanced Raman scattering (SERS) has raised great interest over the past decade. The usual approach toward this goal is to harness the strong surface plasmon resonance of light with complex metallic nanostructures, such as particle aggregates, two-particle gaps, sharp tips, or particles with sharp apexes. Here we propose another route toward the goal by introducing gain medium into single metal nanoparticles with simple geometry. Our calculations show that cubic gold nanobox particles that contain a gain material within the core can create an extremely high enhancement factor of local field intensity larger than 10(8) and a SERS enhancement factor on the order of 10(16)-10(17).

Download full-text PDF

Source
http://dx.doi.org/10.1021/nl903409xDOI Listing
January 2010
3 Reads

Publication Analysis

Top Keywords

detection surface-enhanced
8
single-molecule detection
8
raman scattering
8
enhancement factor
8
metal nanoparticles
8
surface-enhanced raman
8
metallic nanostructures
4
cubic gold
4
nanostructures particle
4
particle aggregates
4
geometry calculations
4
calculations cubic
4
gold nanobox
4
particles gain
4
plasmon resonance
4
gain material
4
resonance light
4
nanobox particles
4
simple geometry
4
light complex
4

Similar Publications