Photochemical tuning of plasmon resonances in single gold nanoparticles
Artikel i vetenskaplig tidskrift, 2008

We report on the spectrally controlled photochemical tuning of the size, shape, and localized surface plasmon resonances of individual gold nanoparticles. Single spheres, extracted from a colloidal solution, and elongated nanodiscs, fabricated by electron beam lithography, were exposed to a gold salt solution while being illuminated one by one by a focused 532-nm laser beam. The photochemical reduction of tetrachloroaureate complexes, followed by the subsequent agglomeration of gold atoms at the particle surface, lead to a well-controlled single-particle growth. This fully in situ monitored method allows us to tune the radius of single spheres as well as the aspect ratio of single ellipsoidal particles, enabling spectral control of their respective localized surface plasmon resonances.

PARTICLES

SHAPE

NANOPARTICLES

SPECTROSCOPY

GROWTH

SIZE-CONTROLLED SYNTHESIS

ENHANCED RAMAN-SCATTERING

NANOCRYSTALS

TRANSITION

FLUORESCENCE

METAL

Författare

T. Hartling

Technische Universität Dresden

Yury Alaverdyan

Chalmers, Teknisk fysik, Bionanofotonik

M. T. Wenzel

Technische Universität Dresden

R. Kullock

Technische Universität Dresden

Mikael Käll

Chalmers, Teknisk fysik, Bionanofotonik

L. Eng

Technische Universität Dresden

Journal of Physical Chemistry C

1932-7447 (ISSN) 1932-7455 (eISSN)

Vol. 112 4920-4924

Ämneskategorier

Annan teknik

DOI

10.1021/jp711257y