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Correlation between structure and optoelectronic properties in a two‐dimensional nanoparticle assembly
Author(s) -
Mangold Markus A.,
Niedermeier Martin A.,
Rawolle Monika,
Dirks Beate,
Perlich Jan,
Roth Stephan V.,
Holleitner Alexander W.,
MüllerBuschbaum Peter
Publication year - 2011
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201004424
Subject(s) - grazing incidence small angle scattering , materials science , scattering , nanoparticle , hexagonal crystal system , absorption (acoustics) , metal , dielectric , colloidal gold , dielectric function , nanotechnology , optoelectronics , optics , crystallography , chemistry , physics , composite material , neutron scattering , small angle neutron scattering , metallurgy
The optical properties of two‐dimensional assemblies of metal nanoparticles are strongly influenced by the morphological configuration of the metal particles in the layer. Therefore, we correlate the structural and optical properties of two‐dimensional, hexagonal gold nanoparticle arrays. We characterize the structure of the arrays using grazing‐incidence small angle X‐ray scattering (GISAXS). From the GISAXS pattern, we determine the size of the gold particles as well as the lattice spacing of the hexagonal assembly. Based upon these parameters we calculate the dielectric function of the gold particle array using the Maxwell–Garnett effective medium theory. We further deduce the absorption spectrum which closely follows the measured absorption and photoconductance spectrum. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)