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.
Institut für Physikalische Chemie und Elektrochemie, TU Dresden, Bergstr. 66 b, 01062 Dresden, Germany.
Nadja C
NC
Bigall
Thomas
T
Härtling
Markus
M
Klose
Paul
P
Simon
Lukas M
LM
Eng
Alexander
A
Eychmüller