Monodisperse platinum nanospheres with adjustable diameters from 10 to 100 nm: synthesis and distinct optical properties.
We present a facile and reproducible method for synthesizing monodisperse platinum (Pt) spheres with sizes ranging from 10 to 100 nm in diameter and exceptionally small standard deviations of 3% for large spheres. The reaction takes place in aqueous solution using a multistep seed-mediated approach. The Pt nanospheres consist of several small crystallites resulting in a surface roughness of 5-10 nm. Extinction spectra are measured from particles dispersed in water and calculated for single particles which are found to be in excellent agreement. We obtain a linear correlation between the plasmon extinction maximum (from UV to the visible regions) and the particle diameter which might be of value for experimentalists in the field.
Bigall
Nadja C
NC
Institut für Physikalische Chemie und Elektrochemie, TU Dresden, Bergstr. 66 b, 01062 Dresden, Germany.
Härtling
Thomas
T
Klose
Markus
M
Simon
Paul
P
Eng
Lukas M
LM
Eychmüller
Alexander
A