| Autor: |
J JL Liu, B BC Cankurtaran, G GM McCredie, M MJF Ford, L LW Wieczorek, M MBC Cortie |
| Předmět: |
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| Zdroj: |
Nanotechnology; Dec2005, Vol. 16 Issue 12, p3023-3028, 6p |
| Abstrakt: |
A colloidal suspension of hollow aluminium, cap-shaped nanoparticles (‘nano-caps’) can beconveniently produced by evaporation of aluminium onto a spin-coated layer of polystyrenenanoparticles (PSNPs), followed by sonication and dissolution of the polymer template.Although ordinary spherical aluminium nanoparticles have a plasmon resonance in theultra-violet, the ‘nano-caps’ show plasmon absorption between 700 and 1200 nm due totheir geometry. The position of their extinction peaks can be tuned by varying thethickness of the aluminium and the shape of the nano-cap. The optical properties of theseshapes were modelled using the discrete dipole approximation method, which confirmedthat the ‘caps’ have very significantly red-shifted absorbance and scattering compared tospheres. This finding suggests that aluminium nano-caps might compete with goldand silver nanoparticles in applications requiring absorption in the near infrared. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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