Preparation, structural, and optical features of two-dimensional cross-linked DNA/gold-nanoparticle conjugates.
The formation and the optical features of two-dimensional aggregates formed by DNA-directed immobilization and cross-linking of bifunctional DNA-gold nanoparticles at flat gold substrates are analyzed. The samples are structurally characterized by atomic force microscopy to evaluate the particle size, the particle densities, and the degree of aggregation. The optical characteristics determined by UV/visible measurements are correlated with the structural features observed.
RWTH Aachen, Institute of Inorganic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
Michael
M
Noyong
Buelent
B
Ceyhan
Christof M
CM
Niemeyer
Ulrich
U
Simon
DNA; Nanoparticles; Optical properties; Self-assembly