Linker-free TiO 2 /CdSe hybrid nanorods (NRs) were prepared by growing CdSe QDs in the presence of TiO 2 NR seeds using seeded-growth type colloidal injection approach. TEM studies revealed the abundant formation of anatase TiO 2 NRs with different lengths. We found that the as-prepared TiO 2 seeds determined the morphology of TiO 2 /CdSe NRs. The photophysics of these materials were studied by photoluminescence (PL) and femtosecond transient absorption spectroscopy. While we observed the efficient PL quenching in TiO 2 /CdSe NRs, the bleach dynamics of TiO 2 /CdSe NRs is similar to that of CdSe NRs. It suggests that while surface traps that arise from the lattice mismatch between CdSe and TiO 2 are mainly observed in transient absorption measurements the ultrafast exciton dissociation over the experimental time resolution occurs in TiO 2 /CdSe NRs.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films