6533b839fe1ef96bd12a5c32
RESEARCH PRODUCT
Synthesis of rod-shaped gold nanorattles with improved plasmon sensitivity and catalytic activity.
Yuriy KhalavkaJan BeckerCarsten Sönnichsensubject
Chemistrytechnology industry and agricultureNanotechnologyGeneral ChemistryDielectricBiochemistryCatalysisRodCatalysisColloid and Surface ChemistryPolarizabilityColloidal goldNanorodsense organsSurface plasmon resonancePlasmondescription
We prepared rod-shaped gold nanorattles solid gold nanorods surrounded by a thin gold shell using a galvanic replacement process starting with silver-coated gold nanorods. These structures are very promising candidates for catalytic applications and optimized plasmon sensors. They combine the advantages of rods (low plasmon resonance frequency, large polarizability, small damping) with the high surface area of hollow structures. The plasmon sensitivity to changes in the dielectric environment is up to 50% higher for gold nanorattles compared to gold nanorods with the same resonance frequency and 6x higher than for plasmons in spherical gold nanoparticles. The catalytic activity measured for the reduction of p-nitrophenol is 4x larger than for bare gold nanorods.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-20 | Journal of the American Chemical Society |