Self-assembly of small gold colloids with functionalized gold nanorods.
We present a general strategy to stabilize gold nanorod suspensions with mono- and bifunctional polyethylene glycol (PEG) and to attach a controlled number of nanoparticles or biomolecules. Characterization by gel electrophoresis, transmission electron microscopy (TEM), and optical dark-field microscopy show the specific binding of functionalized nanorods to their target while avoiding nonspecific binding to substrates, matrices, and other particles. Such nanorods are well suited for self-assembly of nanostructures and single-molecule labeling.
Pierrat
Sebastien
S
Institute for Physical Chemistry, University of Mainz, Jakob-Welderweg 11, 55128 Mainz, Germany.
Zins
Inga
I
Breivogel
Aaron
A
Sönnichsen
Carsten
C