Journal
LANGMUIR
Volume 26, Issue 6, Pages 4188-4195Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la9032223
Keywords
-
Funding
- Danish Ministry of Science
- Danish National Research Foundation
Ask authors/readers for more resources
Silica shells were directly coated onto surfactant-capped gold nanorods by it simple one-step method. The procedure required no intermediate coating of the gold nanorod prior to the formation of the smooth silica shell, the thickness of which could be accurately controlled over the range 60-150 nm. These silica-encased gold nanorods were then covered with a gold overcoat to yield nanoparticles with unique optical properties that varied with the thicknesses of both the silica layer and the gold overcoat. Using these bulk solution-phase techniques, homogeneous distributions of gold-silica-gold layered nanoparticles with a pronounced plasmon extinction band in the near-IR (i.e., similar to 900-1700 nm) are readily and reproducibly prepared. More specifically, when using a core gold nanorod whose dimensions yield a plasmon band in the visible region of the spectrum (e.g., similar to 685 nm), the effect of the gold overcoat is to produce a broad plasmon band that is red-shifted by as much as similar to 1000 nm. As such, these multilaminate particles should be of interest as a convenient tool to enhance weak near-IR radiative transitions (e.g., singlet oxygen, O-2(a(1)Delta(g)), phosphorescence at 1270 nm).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available