Solution-based characterization of surface-enhanced Raman response of single scattering centers

Journal Article · Thu Mar 06 00:00:00 EST 2008 · Journal of the American Chemical Society

OSTI ID:947756

Laurence, T A; Talley, C; Schwartzberg, A; Braun, G; Moskovits, M; Reich, N; Huser, T

We demonstrate the rapid optical characterization of large numbers of individual metal nanoparticles freely diffusing in colloidal solution by confocal laser spectroscopy. We find that hollow gold nanospheres and solid silver nanoparticles linked with a bifunctional ligand, both designed nanostructures, exhibit significantly higher monodispersity in their Rayleigh and Raman scattering response than randomly aggregated gold and silver nanoparticles. We show that measurements of rotational diffusion timescales allow sizing of particles significantly more reliably than can be obtained using translational diffusion timescales.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 947756
• Report Number(s): LLNL-JRNL-402077; JACSAT; TRN: US200905%%252
• Journal Information: Journal of the American Chemical Society, Vol. 131, Issue 1; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUMM MECHANICS
GENERAL PHYSICS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
59 BASIC BIOLOGICAL SCIENCES
DIFFUSION
GOLD
LASER SPECTROSCOPY
NANOSTRUCTURES
SCATTERING
SILVER
SIZE