Abstract
A centrifugal route for separating small {110}-faceted gold nanostructures, namely rhombic dodecahedra (RD) and triangular bipyramids (BPs), which form simultaneously during synthesis and cannot be separated by means of conventional filtration methods, is presented. The centrifuged solution shows two distinct bands: i) RD and ii) BPs, as verified in the corresponding scanning electron microscopy images. The sorted BPs show a refractive index dependence 2.5 times that of the as-synthesized, unsorted mixture.
Original language | English (US) |
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Pages (from-to) | 4023-4027 |
Number of pages | 5 |
Journal | Advanced Materials |
Volume | 25 |
Issue number | 29 |
DOIs | |
State | Published - Aug 7 2013 |
Funding
Keywords
- bipyramids
- density gradient centrifugation
- gold nanoparticles
- localized surface plasmon resonance
- refractive index sensing
- rhombic dodecahedra
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- General Materials Science