We present an enhanced method to form stable dispersions of medium-sized silicon nanoparticles for solar cell applications by thermally induced grafting of acrylic acid to the nanoparticle surface. In order to confirm their covalent attachment on the silicon nanoparticles and to assess the quality of the functionalization, X-ray photoelectron spectroscopy… (More)
The experiments were performed with a home-built low-temperature scanning tunneling microscope (lt-stm) operating at 7 K using a liquid helium flow cryostat (Helitran lt-3b). The setup is similar to the combined afm/stm described by Wintjes et al. .